Merge branch 'master' into addTsConfigWatcher

src/compiler/binder.ts

@@ -74,7 +74,7 @@ namespace ts {
         // If the current node is a container that also container that also contains locals.  Examples:
         //
         //      Functions, Methods, Modules, Source-files.
-        IsContainerWithLocals   = IsContainer | HasLocals
+        IsContainerWithLocals = IsContainer | HasLocals
     }
 
     export function bindSourceFile(file: SourceFile) {
@@ -139,7 +139,7 @@ namespace ts {
         function getDeclarationName(node: Declaration): string {
             if (node.name) {
                 if (node.kind === SyntaxKind.ModuleDeclaration && node.name.kind === SyntaxKind.StringLiteral) {
-                    return '"' + (<LiteralExpression>node.name).text + '"';
+                    return `"${(<LiteralExpression>node.name).text}"`;
                 }
                 if (node.name.kind === SyntaxKind.ComputedPropertyName) {
                     let nameExpression = (<ComputedPropertyName>node.name).expression;
@@ -830,7 +830,7 @@ namespace ts {
 
             // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
             // string to contain unicode escapes (as per ES5).
-            return nodeText === '"use strict"' || nodeText === "'use strict'";
+            return nodeText === "\"use strict\"" || nodeText === "'use strict'";
         }
 
         function bindWorker(node: Node) {
@@ -930,7 +930,7 @@ namespace ts {
         function bindSourceFileIfExternalModule() {
             setExportContextFlag(file);
             if (isExternalModule(file)) {
-                bindAnonymousDeclaration(file, SymbolFlags.ValueModule, '"' + removeFileExtension(file.fileName) + '"');
+                bindAnonymousDeclaration(file, SymbolFlags.ValueModule, `"${removeFileExtension(file.fileName)}"`);
             }
         }
 
@@ -1062,4 +1062,4 @@ namespace ts {
                 : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
         }
     }
-}
+}

src/compiler/commandLineParser.ts

@@ -335,7 +335,7 @@ namespace ts {
       * @param fileName The path to the config file
       */
     export function readConfigFile(fileName: string): { config?: any; error?: Diagnostic }  {
-        let text = '';
+        let text = "";
         try {
             text = sys.readFile(fileName);
         }
@@ -422,10 +422,13 @@ namespace ts {
                 if (json["files"] instanceof Array) {
                     fileNames = map(<string[]>json["files"], s => combinePaths(basePath, s));
                 }
+                else {
+                    errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));                    
+                }
             }
             else {
                 let exclude = json["exclude"] instanceof Array ? map(<string[]>json["exclude"], normalizeSlashes) : undefined;
-                let sysFiles = host.readDirectory(basePath, ".ts", exclude).concat(host.readDirectory(basePath, ".tsx", exclude));
+                let sysFiles = host.readDirectory(basePath, ".ts", exclude).concat(host.readDirectory(basePath, ".tsx", exclude));
                 for (let i = 0; i < sysFiles.length; i++) {
                     let name = sysFiles[i];
                     if (fileExtensionIs(name, ".d.ts")) {

src/compiler/core.ts

@@ -24,6 +24,7 @@ namespace ts {
             set,
             contains,
             remove,
+            clear,
             forEachValue: forEachValueInMap
         };
 
@@ -51,6 +52,10 @@ namespace ts {
         function normalizeKey(key: string) {
             return getCanonicalFileName(normalizeSlashes(key));
         }
+        
+        function clear() {
+            files = {};
+        }
     }
 
     export const enum Comparison {
@@ -193,6 +198,13 @@ namespace ts {
         return array[array.length - 1];
     }
 
+    /**
+     * Performs a binary search, finding the index at which 'value' occurs in 'array'.
+     * If no such index is found, returns the 2's-complement of first index at which
+     * number[index] exceeds number.
+     * @param array A sorted array whose first element must be no larger than number
+     * @param number The value to be searched for in the array.
+     */
     export function binarySearch(array: number[], value: number): number {
         let low = 0;
         let high = array.length - 1;
@@ -219,10 +231,10 @@ namespace ts {
     export function reduceLeft<T, U>(array: T[], f: (a: U, x: T) => U, initial: U): U;
     export function reduceLeft<T, U>(array: T[], f: (a: U, x: T) => U, initial?: U): U {
         if (array) {
-            var count = array.length;
+            const count = array.length;
             if (count > 0) {
-                var pos = 0;
-                var result = arguments.length <= 2 ? array[pos++] : initial;
+                let pos = 0;
+                let result = arguments.length <= 2 ? array[pos++] : initial;
                 while (pos < count) {
                     result = f(<U>result, array[pos++]);
                 }
@@ -236,9 +248,9 @@ namespace ts {
     export function reduceRight<T, U>(array: T[], f: (a: U, x: T) => U, initial: U): U;
     export function reduceRight<T, U>(array: T[], f: (a: U, x: T) => U, initial?: U): U {
         if (array) {
-            var pos = array.length - 1;
+            let pos = array.length - 1;
             if (pos >= 0) {
-                var result = arguments.length <= 2 ? array[pos--] : initial;
+                let result = arguments.length <= 2 ? array[pos--] : initial;
                 while (pos >= 0) {
                     result = f(<U>result, array[pos--]);
                 }
@@ -523,7 +535,7 @@ namespace ts {
         if (path.lastIndexOf("file:///", 0) === 0) {
             return "file:///".length;
         }
-        let idx = path.indexOf('://');
+        let idx = path.indexOf("://");
         if (idx !== -1) {
             return idx + "://".length;
         }
@@ -709,7 +721,7 @@ namespace ts {
     /**
      *  List of supported extensions in order of file resolution precedence.
      */
-    export const supportedExtensions = [".tsx", ".ts", ".d.ts"];
+    export const supportedExtensions = [".ts", ".tsx", ".d.ts"];
 
     const extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
     export function removeFileExtension(path: string): string {
@@ -805,4 +817,4 @@ namespace ts {
             Debug.assert(false, message);
         }
     }
-}
+}

src/compiler/declarationEmitter.ts

@@ -750,14 +750,18 @@ namespace ts {
         }
 
         function writeTypeAliasDeclaration(node: TypeAliasDeclaration) {
+            let prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
             emitJsDocComments(node);
             emitModuleElementDeclarationFlags(node);
             write("type ");
             writeTextOfNode(currentSourceFile, node.name);
+            emitTypeParameters(node.typeParameters);
             write(" = ");
             emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
             write(";");
             writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
 
             function getTypeAliasDeclarationVisibilityError(symbolAccesibilityResult: SymbolAccessiblityResult): SymbolAccessibilityDiagnostic {
                 return {
@@ -1371,7 +1375,7 @@ namespace ts {
             else {
                 writeTextOfNode(currentSourceFile, node.name);
             }
-            if (node.initializer || hasQuestionToken(node)) {
+            if (resolver.isOptionalParameter(node)) {
                 write("?");
             }
             decreaseIndent();
@@ -1497,11 +1501,8 @@ namespace ts {
                         //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
                         writeTextOfNode(currentSourceFile, bindingElement.propertyName);
                         write(": ");
-
-                        // If bindingElement has propertyName property, then its name must be another bindingPattern of SyntaxKind.ObjectBindingPattern
-                        emitBindingPattern(<BindingPattern>bindingElement.name);
                     }
-                    else if (bindingElement.name) {
+                    if (bindingElement.name) {
                         if (isBindingPattern(bindingElement.name)) {
                             // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
                             // In the case of rest element, we will omit rest element.

src/compiler/diagnosticInformationMap.generated.ts

@@ -294,7 +294,7 @@ namespace ts {
         Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: DiagnosticCategory.Error, key: "Multiple constructor implementations are not allowed." },
         Duplicate_function_implementation: { code: 2393, category: DiagnosticCategory.Error, key: "Duplicate function implementation." },
         Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: DiagnosticCategory.Error, key: "Overload signature is not compatible with function implementation." },
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: DiagnosticCategory.Error, key: "Individual declarations in merged declaration {0} must be all exported or all local." },
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: DiagnosticCategory.Error, key: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
         Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: DiagnosticCategory.Error, key: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
         Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: DiagnosticCategory.Error, key: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
         Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: DiagnosticCategory.Error, key: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
@@ -425,6 +425,8 @@ namespace ts {
         JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: DiagnosticCategory.Error, key: "JSX element class does not support attributes because it does not have a '{0}' property" },
         The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: DiagnosticCategory.Error, key: "The global type 'JSX.{0}' may not have more than one property" },
         Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: DiagnosticCategory.Error, key: "Cannot emit namespaced JSX elements in React" },
+        A_member_initializer_in_a_const_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_const_enums: { code: 2651, category: DiagnosticCategory.Error, key: "A member initializer in a 'const' enum declaration cannot reference members declared after it, including members defined in other 'const' enums." },
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: DiagnosticCategory.Error, key: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: DiagnosticCategory.Error, key: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: DiagnosticCategory.Error, key: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: DiagnosticCategory.Error, key: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -613,5 +615,6 @@ namespace ts {
         Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: DiagnosticCategory.Error, key: "Expected corresponding JSX closing tag for '{0}'." },
         JSX_attribute_expected: { code: 17003, category: DiagnosticCategory.Error, key: "JSX attribute expected." },
         Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: DiagnosticCategory.Error, key: "Cannot use JSX unless the '--jsx' flag is provided." },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: DiagnosticCategory.Error, key: "A constructor cannot contain a 'super' call when its class extends 'null'" },
     };
 }

src/compiler/diagnosticMessages.json

@@ -1,4 +1,4 @@
-{
+ {
     "Unterminated string literal.": {
         "category": "Error",
         "code": 1002
@@ -1165,7 +1165,7 @@
         "category": "Error",
         "code": 2394
     },
-    "Individual declarations in merged declaration {0} must be all exported or all local.": {
+    "Individual declarations in merged declaration '{0}' must be all exported or all local.": {
         "category": "Error",
         "code": 2395
     },
@@ -1689,6 +1689,14 @@
         "category": "Error",
         "code": 2650
     },
+    "A member initializer in a 'const' enum declaration cannot reference members declared after it, including members defined in other 'const' enums.": {
+        "category": "Error",
+        "code": 2651
+    },    
+    "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead.": {
+        "category": "Error",
+        "code": 2652
+    },
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",
         "code": 4000
@@ -2445,5 +2453,9 @@
     "Cannot use JSX unless the '--jsx' flag is provided.": {
         "category": "Error",
         "code": 17004
+    },
+    "A constructor cannot contain a 'super' call when its class extends 'null'": {
+      "category": "Error",
+      "code": 17005
     }
 }

src/compiler/parser.ts

@@ -844,6 +844,10 @@ namespace ts {
             return token = scanner.scanJsxIdentifier();
         }
 
+        function scanJsxText(): SyntaxKind {
+            return token = scanner.scanJsxToken();
+        }
+
         function speculationHelper<T>(callback: () => T, isLookAhead: boolean): T {
             // Keep track of the state we'll need to rollback to if lookahead fails (or if the
             // caller asked us to always reset our state).
@@ -913,9 +917,11 @@ namespace ts {
             return token > SyntaxKind.LastReservedWord;
         }
 
-        function parseExpected(kind: SyntaxKind, diagnosticMessage?: DiagnosticMessage): boolean {
+        function parseExpected(kind: SyntaxKind, diagnosticMessage?: DiagnosticMessage, shouldAdvance = true): boolean {
             if (token === kind) {
-                nextToken();
+                if (shouldAdvance) {
+                    nextToken();
+                }
                 return true;
             }
 
@@ -3148,7 +3154,7 @@ namespace ts {
         }
 
         function parseAwaitExpression() {
-            var node = <AwaitExpression>createNode(SyntaxKind.AwaitExpression);
+            const node = <AwaitExpression>createNode(SyntaxKind.AwaitExpression);
             nextToken();
             node.expression = parseUnaryExpressionOrHigher();
             return finishNode(node);
@@ -3178,7 +3184,7 @@ namespace ts {
                         return parseTypeAssertion();
                     }
                     if (lookAhead(nextTokenIsIdentifierOrKeyword)) {
-                        return parseJsxElementOrSelfClosingElement();
+                        return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
                     }
                     // Fall through
                 default:
@@ -3308,14 +3314,14 @@ namespace ts {
             return finishNode(node);
         }
 
-        function parseJsxElementOrSelfClosingElement(): JsxElement|JsxSelfClosingElement {
-            let opening = parseJsxOpeningOrSelfClosingElement();
+        function parseJsxElementOrSelfClosingElement(inExpressionContext: boolean): JsxElement | JsxSelfClosingElement {
+            let opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
             if (opening.kind === SyntaxKind.JsxOpeningElement) {
                 let node = <JsxElement>createNode(SyntaxKind.JsxElement, opening.pos);
                 node.openingElement = opening;
 
                 node.children = parseJsxChildren(node.openingElement.tagName);
-                node.closingElement = parseJsxClosingElement();
+                node.closingElement = parseJsxClosingElement(inExpressionContext);
                 return finishNode(node);
             }
             else {
@@ -3336,11 +3342,11 @@ namespace ts {
                 case SyntaxKind.JsxText:
                     return parseJsxText();
                 case SyntaxKind.OpenBraceToken:
-                    return parseJsxExpression();
+                    return parseJsxExpression(/*inExpressionContext*/ false);
                 case SyntaxKind.LessThanToken:
-                    return parseJsxElementOrSelfClosingElement();
+                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
             }
-            Debug.fail('Unknown JSX child kind ' + token);
+            Debug.fail("Unknown JSX child kind " + token);
         }
 
         function parseJsxChildren(openingTagName: EntityName): NodeArray<JsxChild> {
@@ -3368,7 +3374,7 @@ namespace ts {
             return result;
         }
 
-        function parseJsxOpeningOrSelfClosingElement(): JsxOpeningElement|JsxSelfClosingElement {
+        function parseJsxOpeningOrSelfClosingElement(inExpressionContext: boolean): JsxOpeningElement|JsxSelfClosingElement {
             let fullStart = scanner.getStartPos();
 
             parseExpected(SyntaxKind.LessThanToken);
@@ -3378,12 +3384,22 @@ namespace ts {
             let attributes = parseList(ParsingContext.JsxAttributes, parseJsxAttribute);
             let node: JsxOpeningLikeElement;
 
-            if (parseOptional(SyntaxKind.GreaterThanToken)) {
+            if (token === SyntaxKind.GreaterThanToken) {
+                // Closing tag, so scan the immediately-following text with the JSX scanning instead
+                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
+                // scanning errors
                 node = <JsxOpeningElement>createNode(SyntaxKind.JsxOpeningElement, fullStart);
+                scanJsxText();
             }
             else {
                 parseExpected(SyntaxKind.SlashToken);
-                parseExpected(SyntaxKind.GreaterThanToken);
+                if (inExpressionContext) {
+                    parseExpected(SyntaxKind.GreaterThanToken);
+                }
+                else {
+                    parseExpected(SyntaxKind.GreaterThanToken, /*diagnostic*/ undefined, /*advance*/ false);
+                    scanJsxText();
+                }
                 node = <JsxSelfClosingElement>createNode(SyntaxKind.JsxSelfClosingElement, fullStart);
             }
 
@@ -3406,14 +3422,20 @@ namespace ts {
             return elementName;
         }
 
-        function parseJsxExpression(): JsxExpression {
+        function parseJsxExpression(inExpressionContext: boolean): JsxExpression {
             let node = <JsxExpression>createNode(SyntaxKind.JsxExpression);
 
             parseExpected(SyntaxKind.OpenBraceToken);
             if (token !== SyntaxKind.CloseBraceToken) {
                 node.expression = parseExpression();
             }
-            parseExpected(SyntaxKind.CloseBraceToken);
+            if (inExpressionContext) {
+                parseExpected(SyntaxKind.CloseBraceToken);
+            }
+            else {
+                parseExpected(SyntaxKind.CloseBraceToken, /*message*/ undefined, /*advance*/ false);
+                scanJsxText();
+            }
 
             return finishNode(node);
         }
@@ -3432,7 +3454,7 @@ namespace ts {
                         node.initializer = parseLiteralNode();
                         break;
                     default:
-                        node.initializer = parseJsxExpression();
+                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
                         break;
                 }
             }
@@ -3448,11 +3470,17 @@ namespace ts {
             return finishNode(node);
         }
 
-        function parseJsxClosingElement(): JsxClosingElement {
+        function parseJsxClosingElement(inExpressionContext: boolean): JsxClosingElement {
             let node = <JsxClosingElement>createNode(SyntaxKind.JsxClosingElement);
             parseExpected(SyntaxKind.LessThanSlashToken);
             node.tagName = parseJsxElementName();
-            parseExpected(SyntaxKind.GreaterThanToken);
+            if (inExpressionContext) {
+                parseExpected(SyntaxKind.GreaterThanToken);
+            }
+            else {
+                parseExpected(SyntaxKind.GreaterThanToken, /*diagnostic*/ undefined, /*advance*/ false);
+                scanJsxText();
+            }
             return finishNode(node);
         }
 
@@ -5140,7 +5168,7 @@ namespace ts {
                 // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
                 // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
                 if (token === SyntaxKind.FromKeyword || (token === SyntaxKind.StringLiteral && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(SyntaxKind.FromKeyword)
+                    parseExpected(SyntaxKind.FromKeyword);
                     node.moduleSpecifier = parseModuleSpecifier();
                 }
             }
@@ -6011,7 +6039,7 @@ namespace ts {
             return;
 
             function visitNode(node: IncrementalNode) {
-                let text = '';
+                let text = "";
                 if (aggressiveChecks && shouldCheckNode(node)) {
                     text = oldText.substring(node.pos, node.end);
                 }

src/compiler/program.ts

@@ -8,6 +8,9 @@ namespace ts {
     /* @internal */ export let ioWriteTime = 0;
 
     /** The version of the TypeScript compiler release */
+    
+    let emptyArray: any[] = [];
+    
     export const version = "1.6.0";
 
     export function findConfigFile(searchPath: string): string {
@@ -25,6 +28,62 @@ namespace ts {
         }
         return undefined;
     }
+    
+    export function resolveTripleslashReference(moduleName: string, containingFile: string): string {
+        let basePath = getDirectoryPath(containingFile);
+        let referencedFileName = isRootedDiskPath(moduleName) ? moduleName : combinePaths(basePath, moduleName);
+        return normalizePath(referencedFileName);
+    }
+    
+    export function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModule {
+        // TODO: use different resolution strategy based on compiler options
+        return legacyNameResolver(moduleName, containingFile, compilerOptions, host);
+    }
+
+    function legacyNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModule {
+        
+        // module names that contain '!' are used to reference resources and are not resolved to actual files on disk
+        if (moduleName.indexOf('!') != -1) {
+            return { resolvedFileName: undefined, failedLookupLocations: [] };
+        }
+        
+        let searchPath = getDirectoryPath(containingFile);
+        let searchName: string;
+
+        let failedLookupLocations: string[] = [];
+
+        let referencedSourceFile: string;
+        while (true) {
+            searchName = normalizePath(combinePaths(searchPath, moduleName));
+            referencedSourceFile = forEach(supportedExtensions, extension => {
+                if (extension === ".tsx" && !compilerOptions.jsx) {
+                    // resolve .tsx files only if jsx support is enabled 
+                    // 'logical not' handles both undefined and None cases
+                    return undefined;
+                }
+                
+                let candidate = searchName + extension;
+                if (host.fileExists(candidate)) {
+                    return candidate;
+                }
+                else {
+                    failedLookupLocations.push(candidate);
+                }
+            });
+
+            if (referencedSourceFile) {
+                break;
+            }
+
+            let parentPath = getDirectoryPath(searchPath);
+            if (parentPath === searchPath) {
+                break;
+            }
+            searchPath = parentPath;
+        }
+
+        return { resolvedFileName: referencedSourceFile, failedLookupLocations };
+    }
 
     export function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost {
         let currentDirectory: string;
@@ -92,7 +151,8 @@ namespace ts {
         }
 
         const newLine = getNewLineCharacter(options);
-
+        
+    
         return {
             getSourceFile,
             getDefaultLibFileName: options => combinePaths(getDirectoryPath(normalizePath(sys.getExecutingFilePath())), getDefaultLibFileName(options)),
@@ -100,7 +160,9 @@ namespace ts {
             getCurrentDirectory: () => currentDirectory || (currentDirectory = sys.getCurrentDirectory()),
             useCaseSensitiveFileNames: () => sys.useCaseSensitiveFileNames,
             getCanonicalFileName,
-            getNewLine: () => newLine
+            getNewLine: () => newLine,
+            fileExists: fileName => sys.fileExists(fileName),
+            readFile: fileName => sys.readFile(fileName)
         };
     }
 
@@ -143,7 +205,7 @@ namespace ts {
         }
     }
 
-    export function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost): Program {
+    export function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program {
         let program: Program;
         let files: SourceFile[] = [];
         let diagnostics = createDiagnosticCollection();
@@ -158,24 +220,56 @@ namespace ts {
         let start = new Date().getTime();
 
         host = host || createCompilerHost(options);
+        
+        // initialize resolveModuleNameWorker only if noResolve is false
+        let resolveModuleNamesWorker: (moduleNames: string[], containingFile: string) => string[];
+        if (!options.noResolve) {
+            resolveModuleNamesWorker = host.resolveModuleNames;
+            if (!resolveModuleNamesWorker) {
+                resolveModuleNamesWorker = (moduleNames, containingFile) => {
+                    return map(moduleNames, moduleName => {
+                        let moduleResolution = resolveModuleName(moduleName, containingFile, options, host);
+                        return moduleResolution.resolvedFileName;
+                    });
+                }
+            }
+        }
 
         let filesByName = createFileMap<SourceFile>(fileName => host.getCanonicalFileName(fileName));
-
-        forEach(rootNames, name => processRootFile(name, /*isDefaultLib:*/ false));
-
-        // Do not process the default library if:
-        //  - The '--noLib' flag is used.
-        //  - A 'no-default-lib' reference comment is encountered in
-        //      processing the root files.
-        if (!skipDefaultLib) {
-            processRootFile(host.getDefaultLibFileName(options), /*isDefaultLib:*/ true);
+        
+        if (oldProgram) {
+            // check properties that can affect structure of the program or module resolution strategy
+            // if any of these properties has changed - structure cannot be reused
+            let oldOptions = oldProgram.getCompilerOptions();
+            if ((oldOptions.module !== options.module) || 
+                (oldOptions.noResolve !== options.noResolve) || 
+                (oldOptions.target !== options.target) || 
+                (oldOptions.noLib !== options.noLib) ||
+                (oldOptions.jsx !== options.jsx)) {
+                oldProgram = undefined;
+            }
+        }
+        
+        if (!tryReuseStructureFromOldProgram()) {
+            forEach(rootNames, name => processRootFile(name, false));
+            // Do not process the default library if:
+            //  - The '--noLib' flag is used.
+            //  - A 'no-default-lib' reference comment is encountered in
+            //      processing the root files.
+            if (!skipDefaultLib) {
+                processRootFile(host.getDefaultLibFileName(options), true);
+            }
         }
 
         verifyCompilerOptions();
 
+        // unconditionally set oldProgram to undefined to prevent it from being captured in closure
+        oldProgram = undefined;
+
         programTime += new Date().getTime() - start;
 
         program = {
+            getRootFileNames: () => rootNames,
             getSourceFile: getSourceFile,
             getSourceFiles: () => files,
             getCompilerOptions: () => options,
@@ -211,6 +305,82 @@ namespace ts {
             return classifiableNames;
         }
 
+        function tryReuseStructureFromOldProgram(): boolean {
+            if (!oldProgram) {
+                return false;
+            }
+            
+            Debug.assert(!oldProgram.structureIsReused);
+
+            // there is an old program, check if we can reuse its structure
+            let oldRootNames = oldProgram.getRootFileNames();
+            if (!arrayIsEqualTo(oldRootNames, rootNames)) {
+                return false;
+            }
+            
+            // check if program source files has changed in the way that can affect structure of the program
+            let newSourceFiles: SourceFile[] = [];
+            for (let oldSourceFile of oldProgram.getSourceFiles()) {
+                let newSourceFile = host.getSourceFile(oldSourceFile.fileName, options.target);
+                if (!newSourceFile) {
+                    return false;
+                }
+
+                if (oldSourceFile !== newSourceFile) {                    
+                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
+                        // value of no-default-lib has changed
+                        // this will affect if default library is injected into the list of files
+                        return false;
+                    }
+
+                    // check tripleslash references
+                    if (!arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
+                        // tripleslash references has changed
+                        return false;
+                    }
+                    
+                    // check imports
+                    collectExternalModuleReferences(newSourceFile);                    
+                    if (!arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
+                        // imports has changed
+                        return false;
+                    }
+                    
+                    if (resolveModuleNamesWorker) {
+                        let moduleNames = map(newSourceFile.imports, name => name.text);
+                        let resolutions = resolveModuleNamesWorker(moduleNames, newSourceFile.fileName);
+                        // ensure that module resolution results are still correct
+                        for (let i = 0; i < moduleNames.length; ++i) {
+                            let oldResolution = getResolvedModuleFileName(oldSourceFile, moduleNames[i]);
+                            if (oldResolution !== resolutions[i]) {
+                                return false;
+                            }                            
+                        }
+                    }
+                    // pass the cache of module resolutions from the old source file
+                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
+                }
+                else {
+                    // file has no changes - use it as is
+                    newSourceFile = oldSourceFile;
+                }
+                
+                // if file has passed all checks it should be safe to reuse it
+                newSourceFiles.push(newSourceFile);
+            }
+            
+            // update fileName -> file mapping
+            for (let file of newSourceFiles) {
+                filesByName.set(file.fileName, file);
+            }
+            
+            files = newSourceFiles;
+            
+            oldProgram.structureIsReused = true;
+                
+            return true;
+        }
+
         function getEmitHost(writeFileCallback?: WriteFileCallback): EmitHost {
             return {
                 getCanonicalFileName: fileName => host.getCanonicalFileName(fileName),
@@ -370,16 +540,66 @@ namespace ts {
 
         function processRootFile(fileName: string, isDefaultLib: boolean) {
             processSourceFile(normalizePath(fileName), isDefaultLib);
+        }        
+    
+        function fileReferenceIsEqualTo(a: FileReference, b: FileReference): boolean {
+            return a.fileName === b.fileName;
+        }
+        
+        function moduleNameIsEqualTo(a: LiteralExpression, b: LiteralExpression): boolean {
+            return a.text === b.text;
+        }
+        
+        function collectExternalModuleReferences(file: SourceFile): void {
+            if (file.imports) {
+                return;
+            }
+            
+            let imports: LiteralExpression[];
+            for (let node of file.statements) {
+                switch (node.kind) {
+                    case SyntaxKind.ImportDeclaration:
+                    case SyntaxKind.ImportEqualsDeclaration:
+                    case SyntaxKind.ExportDeclaration:
+                        let moduleNameExpr = getExternalModuleName(node);
+                        if (!moduleNameExpr || moduleNameExpr.kind !== SyntaxKind.StringLiteral) {
+                            break;
+                        }
+                        if (!(<LiteralExpression>moduleNameExpr).text) {
+                            break;
+                        }
+
+                        (imports || (imports = [])).push(<LiteralExpression>moduleNameExpr);
+                        break;
+                    case SyntaxKind.ModuleDeclaration:
+                        if ((<ModuleDeclaration>node).name.kind === SyntaxKind.StringLiteral && (node.flags & NodeFlags.Ambient || isDeclarationFile(file))) {
+                            // TypeScript 1.0 spec (April 2014): 12.1.6
+                            // An AmbientExternalModuleDeclaration declares an external module. 
+                            // This type of declaration is permitted only in the global module.
+                            // The StringLiteral must specify a top - level external module name.
+                            // Relative external module names are not permitted
+                            forEachChild((<ModuleDeclaration>node).body, node => {
+                                if (isExternalModuleImportEqualsDeclaration(node) &&
+                                    getExternalModuleImportEqualsDeclarationExpression(node).kind === SyntaxKind.StringLiteral) {
+                                    let moduleName = <LiteralExpression>getExternalModuleImportEqualsDeclarationExpression(node);
+                                    // TypeScript 1.0 spec (April 2014): 12.1.6
+                                    // An ExternalImportDeclaration in anAmbientExternalModuleDeclaration may reference other external modules 
+                                    // only through top - level external module names. Relative external module names are not permitted.
+                                    if (moduleName) {
+                                        (imports || (imports = [])).push(moduleName);
+                                    }
+                                }
+                            });
+                        }
+                        break;
+                }
+            }
+
+            file.imports = imports || emptyArray;
         }
 
         function processSourceFile(fileName: string, isDefaultLib: boolean, refFile?: SourceFile, refPos?: number, refEnd?: number) {
-            let start: number;
-            let length: number;
             let diagnosticArgument: string[];
-            if (refEnd !== undefined && refPos !== undefined) {
-                start = refPos;
-                length = refEnd - refPos;
-            }
             let diagnostic: DiagnosticMessage;
             if (hasExtension(fileName)) {
                 if (!options.allowNonTsExtensions && !forEach(supportedExtensions, extension => fileExtensionIs(host.getCanonicalFileName(fileName), extension))) {
@@ -411,8 +631,8 @@ namespace ts {
             }
 
             if (diagnostic) {
-                if (refFile) {
-                    diagnostics.add(createFileDiagnostic(refFile, start, length, diagnostic, ...diagnosticArgument));
+                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
+                    diagnostics.add(createFileDiagnostic(refFile, refPos, refEnd - refPos, diagnostic, ...diagnosticArgument));
                 }
                 else {
                     diagnostics.add(createCompilerDiagnostic(diagnostic, ...diagnosticArgument));
@@ -421,7 +641,7 @@ namespace ts {
         }
 
         // Get source file from normalized fileName
-        function findSourceFile(fileName: string, isDefaultLib: boolean, refFile?: SourceFile, refStart?: number, refLength?: number): SourceFile {
+        function findSourceFile(fileName: string, isDefaultLib: boolean, refFile?: SourceFile, refPos?: number, refEnd?: number): SourceFile {
             let canonicalName = host.getCanonicalFileName(normalizeSlashes(fileName));
             if (filesByName.contains(canonicalName)) {
                 // We've already looked for this file, use cached result
@@ -436,8 +656,8 @@ namespace ts {
 
                 // We haven't looked for this file, do so now and cache result
                 let file = host.getSourceFile(fileName, options.target, hostErrorMessage => {
-                    if (refFile) {
-                        diagnostics.add(createFileDiagnostic(refFile, refStart, refLength,
+                    if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                        diagnostics.add(createFileDiagnostic(refFile, refPos, refEnd - refPos,
                             Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
                     }
                     else {
@@ -473,8 +693,13 @@ namespace ts {
                 if (file && host.useCaseSensitiveFileNames()) {
                     let sourceFileName = useAbsolutePath ? getNormalizedAbsolutePath(file.fileName, host.getCurrentDirectory()) : file.fileName;
                     if (canonicalName !== sourceFileName) {
-                        diagnostics.add(createFileDiagnostic(refFile, refStart, refLength,
-                            Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, sourceFileName));
+                        if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                            diagnostics.add(createFileDiagnostic(refFile, refPos, refEnd - refPos,
+                                Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, sourceFileName));
+                        }
+                        else {
+                            diagnostics.add(createCompilerDiagnostic(Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, sourceFileName));
+                        }
                     }
                 }
                 return file;
@@ -483,60 +708,35 @@ namespace ts {
 
         function processReferencedFiles(file: SourceFile, basePath: string) {
             forEach(file.referencedFiles, ref => {
-                let referencedFileName = isRootedDiskPath(ref.fileName) ? ref.fileName : combinePaths(basePath, ref.fileName);
-                processSourceFile(normalizePath(referencedFileName), /* isDefaultLib */ false, file, ref.pos, ref.end);
+                let referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
+                processSourceFile(referencedFileName, /* isDefaultLib */ false, file, ref.pos, ref.end);
             });
         }
-
-        function processImportedModules(file: SourceFile, basePath: string) {
-            forEach(file.statements, node => {
-                if (node.kind === SyntaxKind.ImportDeclaration || node.kind === SyntaxKind.ImportEqualsDeclaration || node.kind === SyntaxKind.ExportDeclaration) {
-                    let moduleNameExpr = getExternalModuleName(node);
-                    if (moduleNameExpr && moduleNameExpr.kind === SyntaxKind.StringLiteral) {
-                        let moduleNameText = (<LiteralExpression>moduleNameExpr).text;
-                        if (moduleNameText) {
-                            let searchPath = basePath;
-                            let searchName: string;
-                            while (true) {
-                                searchName = normalizePath(combinePaths(searchPath, moduleNameText));
-                                if (forEach(supportedExtensions, extension => findModuleSourceFile(searchName + extension, moduleNameExpr))) {
-                                    break;
-                                }
-                                let parentPath = getDirectoryPath(searchPath);
-                                if (parentPath === searchPath) {
-                                    break;
-                                }
-                                searchPath = parentPath;
-                            }
-                        }
+       
+        function processImportedModules(file: SourceFile, basePath: string) {            
+            collectExternalModuleReferences(file);            
+            if (file.imports.length) {               
+                file.resolvedModules = {};
+                let oldSourceFile = oldProgram && oldProgram.getSourceFile(file.fileName);
+                
+                let moduleNames = map(file.imports, name => name.text);
+                let resolutions = resolveModuleNamesWorker(moduleNames, file.fileName);
+                for (let i = 0; i < file.imports.length; ++i) {
+                    let resolution = resolutions[i];
+                    setResolvedModuleName(file, moduleNames[i], resolution);
+                    if (resolution) {
+                        findModuleSourceFile(resolution, file.imports[i]);
                     }
-                }
-                else if (node.kind === SyntaxKind.ModuleDeclaration && (<ModuleDeclaration>node).name.kind === SyntaxKind.StringLiteral && (node.flags & NodeFlags.Ambient || isDeclarationFile(file))) {
-                    // TypeScript 1.0 spec (April 2014): 12.1.6
-                    // An AmbientExternalModuleDeclaration declares an external module.
-                    // This type of declaration is permitted only in the global module.
-                    // The StringLiteral must specify a top - level external module name.
-                    // Relative external module names are not permitted
-                    forEachChild((<ModuleDeclaration>node).body, node => {
-                        if (isExternalModuleImportEqualsDeclaration(node) &&
-                            getExternalModuleImportEqualsDeclarationExpression(node).kind === SyntaxKind.StringLiteral) {
-
-                            let nameLiteral = <LiteralExpression>getExternalModuleImportEqualsDeclarationExpression(node);
-                            let moduleName = nameLiteral.text;
-                            if (moduleName) {
-                                // TypeScript 1.0 spec (April 2014): 12.1.6
-                                // An ExternalImportDeclaration in anAmbientExternalModuleDeclaration may reference other external modules
-                                // only through top - level external module names. Relative external module names are not permitted.
-                                let searchName = normalizePath(combinePaths(basePath, moduleName));
-                                forEach(supportedExtensions, extension => findModuleSourceFile(searchName + extension, nameLiteral));
-                            }
-                        }
-                    });
-                }
-            });
+                }                
+            }
+            else {
+                // no imports - drop cached module resolutions
+                file.resolvedModules = undefined;
+            }
+            return;
 
             function findModuleSourceFile(fileName: string, nameLiteral: Expression) {
-                return findSourceFile(fileName, /* isDefaultLib */ false, file, nameLiteral.pos, nameLiteral.end - nameLiteral.pos);
+                return findSourceFile(fileName, /* isDefaultLib */ false, file, nameLiteral.pos, nameLiteral.end);
             }
         }
 

src/compiler/scanner.ts

@@ -319,14 +319,21 @@ namespace ts {
     }
 
     /* @internal */
+    /**
+     * We assume the first line starts at position 0 and 'position' is non-negative.
+     */
     export function computeLineAndCharacterOfPosition(lineStarts: number[], position: number) {
         let lineNumber = binarySearch(lineStarts, position);
         if (lineNumber < 0) {
             // If the actual position was not found,
-            // the binary search returns the negative value of the next line start
+            // the binary search returns the 2's-complement of the next line start
             // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
-            // then the search will return -2
+            // then the search will return -2.
+            //
+            // We want the index of the previous line start, so we subtract 1.
+            // Review 2's-complement if this is confusing.
             lineNumber = ~lineNumber - 1;
+            Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
         }
         return {
             line: lineNumber,
@@ -401,6 +408,9 @@ namespace ts {
               case CharacterCodes.greaterThan:
                   // Starts of conflict marker trivia
                   return true;
+              case CharacterCodes.hash:
+                  // Only if its the beginning can we have #! trivia
+                  return pos === 0;
               default:
                   return ch > CharacterCodes.maxAsciiCharacter;
           }
@@ -461,6 +471,13 @@ namespace ts {
                       }
                       break;
 
+                  case CharacterCodes.hash:
+                      if (isShebangTrivia(text, pos)) {
+                          pos = scanShebangTrivia(text, pos);
+                          continue;
+                      }
+                      break;
+
                   default:
                       if (ch > CharacterCodes.maxAsciiCharacter && (isWhiteSpace(ch) || isLineBreak(ch))) {
                           pos++;
@@ -528,13 +545,31 @@ namespace ts {
         return pos;
     }
 
-    // Extract comments from the given source text starting at the given position. If trailing is
-    // false, whitespace is skipped until the first line break and comments between that location
-    // and the next token are returned.If trailing is true, comments occurring between the given
-    // position and the next line break are returned.The return value is an array containing a
-    // TextRange for each comment. Single-line comment ranges include the beginning '//' characters
-    // but not the ending line break. Multi - line comment ranges include the beginning '/* and
-    // ending '*/' characters.The return value is undefined if no comments were found.
+    const shebangTriviaRegex = /^#!.*/;
+
+    function isShebangTrivia(text: string, pos: number) {
+        // Shebangs check must only be done at the start of the file
+        Debug.assert(pos === 0);
+        return shebangTriviaRegex.test(text);
+    }
+
+    function scanShebangTrivia(text: string, pos: number) {
+        let shebang = shebangTriviaRegex.exec(text)[0];
+        pos = pos + shebang.length;
+        return pos;
+    }
+
+    /**
+     * Extract comments from text prefixing the token closest following `pos`. 
+     * The return value is an array containing a TextRange for each comment.
+     * Single-line comment ranges include the beginning '//' characters but not the ending line break.
+     * Multi - line comment ranges include the beginning '/* and ending '<asterisk>/' characters.
+     * The return value is undefined if no comments were found.
+     * @param trailing 
+     * If false, whitespace is skipped until the first line break and comments between that location
+     * and the next token are returned.
+     * If true, comments occurring between the given position and the next line break are returned.
+     */
     function getCommentRanges(text: string, pos: number, trailing: boolean): CommentRange[] {
         let result: CommentRange[];
         let collecting = trailing || pos === 0;
@@ -617,6 +652,13 @@ namespace ts {
     export function getTrailingCommentRanges(text: string, pos: number): CommentRange[] {
         return getCommentRanges(text, pos, /*trailing*/ true);
     }
+    
+    /** Optionally, get the shebang */
+    export function getShebang(text: string): string {
+        return shebangTriviaRegex.test(text)
+            ? shebangTriviaRegex.exec(text)[0]
+            : undefined;
+    }
 
     export function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean {
         return ch >= CharacterCodes.A && ch <= CharacterCodes.Z || ch >= CharacterCodes.a && ch <= CharacterCodes.z ||
@@ -629,9 +671,8 @@ namespace ts {
             ch >= CharacterCodes._0 && ch <= CharacterCodes._9 || ch === CharacterCodes.$ || ch === CharacterCodes._ ||
             ch > CharacterCodes.maxAsciiCharacter && isUnicodeIdentifierPart(ch, languageVersion);
     }
-
-    /* @internal */
-    // Creates a scanner over a (possibly unspecified) range of a piece of text.
+
+    // Creates a scanner over a (possibly unspecified) range of a piece of text.
     export function createScanner(languageVersion: ScriptTarget,
                                   skipTrivia: boolean,
                                   languageVariant = LanguageVariant.Standard,
@@ -1087,6 +1128,18 @@ namespace ts {
                     return token = SyntaxKind.EndOfFileToken;
                 }
                 let ch = text.charCodeAt(pos);
+
+                // Special handling for shebang
+                if (ch === CharacterCodes.hash && pos === 0 && isShebangTrivia(text, pos)) {
+                    pos = scanShebangTrivia(text, pos);
+                    if (skipTrivia) {
+                        continue;
+                    }
+                    else {
+                        return token = SyntaxKind.ShebangTrivia;
+                    }
+                }
+
                 switch (ch) {
                     case CharacterCodes.lineFeed:
                     case CharacterCodes.carriageReturn:

src/compiler/sys.ts

@@ -30,8 +30,8 @@ namespace ts {
     declare var global: any;
     declare var __filename: string;
     declare var Buffer: {  
-        new (str: string, encoding ?: string): any;  
-    }
+        new (str: string, encoding?: string): any;  
+    };
 
     declare class Enumerator {
         public atEnd(): boolean;
@@ -188,13 +188,13 @@ namespace ts {
             };
         }
         function getNodeSystem(): System {
-            var _fs = require("fs");
-            var _path = require("path");
-            var _os = require('os');
+            const _fs = require("fs");
+            const _path = require("path");
+            const _os = require("os");
 
-            var platform: string = _os.platform();
+            const platform: string = _os.platform();
             // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
-            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
+            const useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
 
             function readFile(fileName: string, encoding?: string): string {
                 if (!_fs.existsSync(fileName)) {
@@ -228,7 +228,7 @@ namespace ts {
             function writeFile(fileName: string, data: string, writeByteOrderMark?: boolean): void {
                 // If a BOM is required, emit one
                 if (writeByteOrderMark) {
-                    data = '\uFEFF' + data;
+                    data = "\uFEFF" + data;
                 }
 
                 _fs.writeFileSync(fileName, data, "utf8");
@@ -271,10 +271,10 @@ namespace ts {
                 newLine: _os.EOL,
                 useCaseSensitiveFileNames: useCaseSensitiveFileNames,
                 write(s: string): void {  
-                    var buffer = new Buffer(s, 'utf8');  
-                    var offset: number = 0;
-                    var toWrite: number = buffer.length;
-                    var written = 0;
+                    const buffer = new Buffer(s, "utf8");  
+                    let offset: number = 0;
+                    let toWrite: number = buffer.length;
+                    let written = 0;
                     // 1 is a standard descriptor for stdout
                     while ((written = _fs.writeSync(1, buffer, offset, toWrite)) < toWrite) {
                         offset += written;
@@ -297,7 +297,7 @@ namespace ts {
                         }
 
                         callback(fileName);
-                    };
+                    }
                 },
                 resolvePath: function (path: string): string {
                     return _path.resolve(path);
@@ -334,7 +334,9 @@ namespace ts {
         if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
             return getWScriptSystem();
         }
-        else if (typeof module !== "undefined" && module.exports) {
+        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
+            // process and process.nextTick checks if current environment is node-like
+            // process.browser check excludes webpack and browserify
             return getNodeSystem();
         }
         else {

src/compiler/tsc.ts

@@ -3,7 +3,7 @@
 
 namespace ts {
     export interface SourceFile {
-        fileWatcher: FileWatcher;
+        fileWatcher?: FileWatcher;
     }
 
     /**
@@ -14,7 +14,7 @@ namespace ts {
         let matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
 
         if (!matchResult) {
-            errors.push(createCompilerDiagnostic(Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, 'en', 'ja-jp'));
+            errors.push(createCompilerDiagnostic(Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
             return false;
         }
 
@@ -49,7 +49,7 @@ namespace ts {
         }
 
         // TODO: Add codePage support for readFile?
-        let fileContents = '';
+        let fileContents = "";
         try {
             fileContents = sys.readFile(filePath);
         }
@@ -245,7 +245,7 @@ namespace ts {
             reportDiagnostic(createCompilerDiagnostic(Diagnostics.Compilation_complete_Watching_for_file_changes));
         }
 
-        function getSourceFile(fileName: string, languageVersion: ScriptTarget, onError ?: (message: string) => void) {
+        function getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void) {
             // Return existing SourceFile object if one is available
             if (cachedProgram) {
                 let sourceFile = cachedProgram.getSourceFile(fileName);
@@ -355,22 +355,23 @@ namespace ts {
         return { program, exitStatus };
 
         function compileProgram(): ExitStatus {
-            // First get any syntactic errors.
-            let diagnostics = program.getSyntacticDiagnostics();
-            reportDiagnostics(diagnostics);
+            let diagnostics: Diagnostic[];
+            
+            // First get and report any syntactic errors.
+            diagnostics = program.getSyntacticDiagnostics();
 
             // If we didn't have any syntactic errors, then also try getting the global and
             // semantic errors.
             if (diagnostics.length === 0) {
-                let diagnostics = program.getGlobalDiagnostics();
-                reportDiagnostics(diagnostics);
+                diagnostics = program.getOptionsDiagnostics().concat(program.getGlobalDiagnostics());
 
                 if (diagnostics.length === 0) {
-                    let diagnostics = program.getSemanticDiagnostics();
-                    reportDiagnostics(diagnostics);
+                    diagnostics = program.getSemanticDiagnostics();
                 }
             }
 
+            reportDiagnostics(diagnostics);
+
             // If the user doesn't want us to emit, then we're done at this point.
             if (compilerOptions.noEmit) {
                 return diagnostics.length

src/compiler/types.ts

@@ -9,6 +9,7 @@ namespace ts {
         contains(fileName: string): boolean;
         remove(fileName: string): void;
         forEachValue(f: (v: T) => void): void;
+        clear(): void;
     }
 
     export interface TextRange {
@@ -17,6 +18,7 @@ namespace ts {
     }
 
     // token > SyntaxKind.Identifer => token is a keyword
+    // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
     export const enum SyntaxKind {
         Unknown,
         EndOfFileToken,
@@ -24,6 +26,8 @@ namespace ts {
         MultiLineCommentTrivia,
         NewLineTrivia,
         WhitespaceTrivia,
+        // We detect and preserve #! on the first line
+        ShebangTrivia,
         // We detect and provide better error recovery when we encounter a git merge marker.  This
         // allows us to edit files with git-conflict markers in them in a much more pleasant manner.
         ConflictMarkerTrivia,
@@ -583,9 +587,9 @@ namespace ts {
      * Several node kinds share function-like features such as a signature,
      * a name, and a body. These nodes should extend FunctionLikeDeclaration.
      * Examples:
-     *  FunctionDeclaration
-     *  MethodDeclaration
-     *  AccessorDeclaration
+     * - FunctionDeclaration
+     * - MethodDeclaration
+     * - AccessorDeclaration
      */
     export interface FunctionLikeDeclaration extends SignatureDeclaration {
         _functionLikeDeclarationBrand: any;
@@ -1240,6 +1244,10 @@ namespace ts {
         moduleName: string;
         referencedFiles: FileReference[];
         languageVariant: LanguageVariant;
+        
+        // this map is used by transpiler to supply alternative names for dependencies (i.e. in case of bundling)
+        /* @internal */
+        renamedDependencies?: Map<string>;
 
         /**
          * lib.d.ts should have a reference comment like
@@ -1272,8 +1280,12 @@ namespace ts {
         // Stores a line map for the file.
         // This field should never be used directly to obtain line map, use getLineMap function instead.
         /* @internal */ lineMap: number[];
-
         /* @internal */ classifiableNames?: Map<string>;
+        // Stores a mapping 'external module reference text' -> 'resolved file name' | undefined
+        // It is used to resolve module names in the checker.
+        // Content of this fiels should never be used directly - use getResolvedModuleFileName/setResolvedModuleFileName functions instead
+        /* @internal */ resolvedModules: Map<string>;
+        /* @internal */ imports: LiteralExpression[];
     }
 
     export interface ScriptReferenceHost {
@@ -1282,7 +1294,7 @@ namespace ts {
         getCurrentDirectory(): string;
     }
 
-    export interface ParseConfigHost {
+    export interface ParseConfigHost extends ModuleResolutionHost {
         readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
     }
 
@@ -1300,6 +1312,12 @@ namespace ts {
     }
 
     export interface Program extends ScriptReferenceHost {
+        
+        /**
+         * Get a list of root file names that were passed to a 'createProgram'
+         */
+        getRootFileNames(): string[]
+        
         /**
          * Get a list of files in the program
          */
@@ -1340,6 +1358,9 @@ namespace ts {
         /* @internal */ getIdentifierCount(): number;
         /* @internal */ getSymbolCount(): number;
         /* @internal */ getTypeCount(): number;
+
+        // For testing purposes only.
+        /* @internal */ structureIsReused?: boolean;
     }
 
     export interface SourceMapSpan {
@@ -1431,6 +1452,7 @@ namespace ts {
 
         getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
         getJsxIntrinsicTagNames(): Symbol[];
+        isOptionalParameter(node: ParameterDeclaration): boolean;
 
         // Should not be called directly.  Should only be accessed through the Program instance.
         /* @internal */ getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
@@ -1574,7 +1596,8 @@ namespace ts {
         getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
         getBlockScopedVariableId(node: Identifier): number;
         getReferencedValueDeclaration(reference: Identifier): Declaration;
-        getTypeReferenceSerializationKind(node: TypeReferenceNode): TypeReferenceSerializationKind; 
+        getTypeReferenceSerializationKind(typeName: EntityName): TypeReferenceSerializationKind; 
+        isOptionalParameter(node: ParameterDeclaration): boolean;
     }
 
     export const enum SymbolFlags {
@@ -1768,7 +1791,9 @@ namespace ts {
         ContainsUndefinedOrNull = 0x00200000,  // Type is or contains Undefined or Null type
         /* @internal */
         ContainsObjectLiteral   = 0x00400000,  // Type is or contains object literal type
-        ESSymbol                = 0x00800000,  // Type of symbol primitive introduced in ES6
+        /* @internal */
+        ContainsAnyFunctionType = 0x00800000,  // Type is or contains object literal type
+        ESSymbol                = 0x01000000,  // Type of symbol primitive introduced in ES6
 
         /* @internal */
         Intrinsic = Any | String | Number | Boolean | ESSymbol | Void | Undefined | Null,
@@ -1777,10 +1802,12 @@ namespace ts {
         StringLike = String | StringLiteral,
         NumberLike = Number | Enum,
         ObjectType = Class | Interface | Reference | Tuple | Anonymous,
-        UnionOrIntersection = Union | Intersection,
+        UnionOrIntersection = Union | Intersection,
         StructuredType = ObjectType | Union | Intersection,
         /* @internal */
-        RequiresWidening = ContainsUndefinedOrNull | ContainsObjectLiteral
+        RequiresWidening = ContainsUndefinedOrNull | ContainsObjectLiteral,
+        /* @internal */
+        PropagatingFlags = ContainsUndefinedOrNull | ContainsObjectLiteral | ContainsAnyFunctionType
     }
 
     // Properties common to all types
@@ -2220,9 +2247,23 @@ namespace ts {
         byteOrderMark = 0xFEFF,
         tab = 0x09,                   // \t
         verticalTab = 0x0B,           // \v
+    }   
+    
+    export interface ModuleResolutionHost {
+        fileExists(fileName: string): boolean;
+        // readFile function is used to read arbitrary text files on disk, i.e. when resolution procedure needs the content of 'package.json'
+        // to determine location of bundled typings for node module 
+        readFile(fileName: string): string;
     }
+    
+    export interface ResolvedModule {
+        resolvedFileName: string;
+        failedLookupLocations: string[];
+    }
+    
+    export type ModuleNameResolver = (moduleName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost) => ResolvedModule;
 
-    export interface CompilerHost {
+    export interface CompilerHost extends ModuleResolutionHost {
         getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
         getCancellationToken?(): CancellationToken;
         getDefaultLibFileName(options: CompilerOptions): string;
@@ -2231,6 +2272,15 @@ namespace ts {
         getCanonicalFileName(fileName: string): string;
         useCaseSensitiveFileNames(): boolean;
         getNewLine(): string;
+        
+        /*
+         * CompilerHost must either implement resolveModuleNames (in case if it wants to be completely in charge of 
+         * module name resolution) or provide implementation for methods from ModuleResolutionHost (in this case compiler 
+         * will appply built-in module resolution logic and use members of ModuleResolutionHost to ask host specific questions).
+         * If resolveModuleNames is implemented then implementation for members from ModuleResolutionHost can be just 
+         * 'throw new Error("NotImplemented")'  
+         */
+        resolveModuleNames?(moduleNames: string[], containingFile: string): string[];
     }
 
     export interface TextSpan {

src/compiler/utilities.ts

@@ -80,6 +80,41 @@ namespace ts {
         return node.end - node.pos;
     }
 
+    export function arrayIsEqualTo<T>(arr1: T[], arr2: T[], comparer?: (a: T, b: T) => boolean): boolean {
+        if (!arr1 || !arr2) {
+            return arr1 === arr2;
+        }
+
+        if (arr1.length !== arr2.length) {
+            return false;
+        }
+
+        for (let i = 0; i < arr1.length; ++i) {
+            let equals = comparer ? comparer(arr1[i], arr2[i]) : arr1[i] === arr2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+
+        return true;
+    }    
+   
+    export function hasResolvedModuleName(sourceFile: SourceFile, moduleNameText: string): boolean {
+        return sourceFile.resolvedModules && hasProperty(sourceFile.resolvedModules, moduleNameText);
+    }
+
+    export function getResolvedModuleFileName(sourceFile: SourceFile, moduleNameText: string): string {
+        return hasResolvedModuleName(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+    }
+
+    export function setResolvedModuleName(sourceFile: SourceFile, moduleNameText: string, resolvedFileName: string): void {
+        if (!sourceFile.resolvedModules) {
+            sourceFile.resolvedModules = {};
+        }
+
+        sourceFile.resolvedModules[moduleNameText] = resolvedFileName;
+    }
+
     // Returns true if this node contains a parse error anywhere underneath it.
     export function containsParseError(node: Node): boolean {
         aggregateChildData(node);
@@ -205,7 +240,7 @@ namespace ts {
     // Make an identifier from an external module name by extracting the string after the last "/" and replacing
     // all non-alphanumeric characters with underscores
     export function makeIdentifierFromModuleName(moduleName: string): string {
-        return getBaseFileName(moduleName).replace(/\W/g, "_");
+        return getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
     }
 
     export function isBlockOrCatchScoped(declaration: Declaration) {
@@ -381,24 +416,15 @@ namespace ts {
     }
 
     export function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode: SourceFile) {
-        // If parameter/type parameter, the prev token trailing comments are part of this node too
-        if (node.kind === SyntaxKind.Parameter || node.kind === SyntaxKind.TypeParameter) {
-            // e.g.   (/** blah */ a, /** blah */ b);
-
-            // e.g.:     (
-            //            /** blah */ a,
-            //            /** blah */ b);
-            return concatenate(
-                getTrailingCommentRanges(sourceFileOfNode.text, node.pos),
-                getLeadingCommentRanges(sourceFileOfNode.text, node.pos));
-        }
-        else {
-            return getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
-        }
+        return getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
     }
 
     export function getJsDocComments(node: Node, sourceFileOfNode: SourceFile) {
-        return filter(getLeadingCommentRangesOfNode(node, sourceFileOfNode), isJsDocComment);
+        let commentRanges = (node.kind === SyntaxKind.Parameter || node.kind === SyntaxKind.TypeParameter) ?
+            concatenate(getTrailingCommentRanges(sourceFileOfNode.text, node.pos),
+                getLeadingCommentRanges(sourceFileOfNode.text, node.pos)) :
+            getLeadingCommentRangesOfNode(node, sourceFileOfNode);
+        return filter(commentRanges, isJsDocComment);
 
         function isJsDocComment(comment: CommentRange) {
             // True if the comment starts with '/**' but not if it is '/**/'
@@ -615,6 +641,20 @@ namespace ts {
         return false;
     }
 
+    export function introducesArgumentsExoticObject(node: Node) {
+        switch (node.kind) {
+            case SyntaxKind.MethodDeclaration:
+            case SyntaxKind.MethodSignature:
+            case SyntaxKind.Constructor:
+            case SyntaxKind.GetAccessor:
+            case SyntaxKind.SetAccessor:
+            case SyntaxKind.FunctionDeclaration:
+            case SyntaxKind.FunctionExpression:
+                return true;
+        }
+        return false;
+    }
+
     export function isFunctionBlock(node: Node) {
         return node && node.kind === SyntaxKind.Block && isFunctionLike(node.parent);
     }
@@ -988,15 +1028,13 @@ namespace ts {
         if (node) {
             switch (node.kind) {
                 case SyntaxKind.Parameter:
-                    return (<ParameterDeclaration>node).questionToken !== undefined;
                 case SyntaxKind.MethodDeclaration:
                 case SyntaxKind.MethodSignature:
-                    return (<MethodDeclaration>node).questionToken !== undefined;
                 case SyntaxKind.ShorthandPropertyAssignment:
                 case SyntaxKind.PropertyAssignment:
                 case SyntaxKind.PropertyDeclaration:
                 case SyntaxKind.PropertySignature:
-                    return (<PropertyDeclaration>node).questionToken !== undefined;
+                    return (<ParameterDeclaration | MethodDeclaration | PropertyDeclaration>node).questionToken !== undefined;
             }
         }
 
@@ -1424,6 +1462,22 @@ namespace ts {
         return isFunctionLike(n) || n.kind === SyntaxKind.ModuleDeclaration || n.kind === SyntaxKind.SourceFile;
     }
 
+    export function cloneEntityName(node: EntityName): EntityName {
+        if (node.kind === SyntaxKind.Identifier) {
+            let clone = <Identifier>createSynthesizedNode(SyntaxKind.Identifier);
+            clone.text = (<Identifier>node).text;
+            return clone;
+        }
+        else {
+            let clone = <QualifiedName>createSynthesizedNode(SyntaxKind.QualifiedName);
+            clone.left = cloneEntityName((<QualifiedName>node).left);
+            clone.left.parent = clone;
+            clone.right = <Identifier>cloneEntityName((<QualifiedName>node).right);
+            clone.right.parent = clone;
+            return clone;
+        }
+    }
+
     export function nodeIsSynthesized(node: Node): boolean {
         return node.pos === -1;
     }
@@ -1868,7 +1922,7 @@ namespace ts {
 
         function writeTrimmedCurrentLine(pos: number, nextLineStart: number) {
             let end = Math.min(comment.end, nextLineStart - 1);
-            let currentLineText = currentSourceFile.text.substring(pos, end).replace(/^\s+|\s+$/g, '');
+            let currentLineText = currentSourceFile.text.substring(pos, end).replace(/^\s+|\s+$/g, "");
             if (currentLineText) {
                 // trimmed forward and ending spaces text
                 writer.write(currentLineText);

src/harness/compilerRunner.ts

@@ -1,6 +1,6 @@
-/// <reference path='harness.ts' />
-/// <reference path='runnerbase.ts' />
-/// <reference path='typeWriter.ts' />
+/// <reference path="harness.ts" />
+/// <reference path="runnerbase.ts" />
+/// <reference path="typeWriter.ts" />
 
 const enum CompilerTestType {
     Conformance,
@@ -9,7 +9,7 @@ const enum CompilerTestType {
 }
 
 class CompilerBaselineRunner extends RunnerBase {
-    private basePath = 'tests/cases';
+    private basePath = "tests/cases";
     private testSuiteName: string;
     private errors: boolean;
     private emit: boolean;
@@ -25,21 +25,21 @@ class CompilerBaselineRunner extends RunnerBase {
         this.decl = true;
         this.output = true;
         if (testType === CompilerTestType.Conformance) {
-            this.testSuiteName = 'conformance';
+            this.testSuiteName = "conformance";
         }
         else if (testType === CompilerTestType.Regressions) {
-            this.testSuiteName = 'compiler';
+            this.testSuiteName = "compiler";
         }
         else if (testType === CompilerTestType.Test262) {
-            this.testSuiteName = 'test262';
+            this.testSuiteName = "test262";
         } else {
-            this.testSuiteName = 'compiler'; // default to this for historical reasons
+            this.testSuiteName = "compiler"; // default to this for historical reasons
         }
-        this.basePath += '/' + this.testSuiteName;
+        this.basePath += "/" + this.testSuiteName;
     }
 
     public checkTestCodeOutput(fileName: string) {
-        describe('compiler tests for ' + fileName, () => {
+        describe("compiler tests for " + fileName, () => {
             // Mocha holds onto the closure environment of the describe callback even after the test is done.
             // Everything declared here should be cleared out in the "after" callback.
             let justName: string;
@@ -64,14 +64,14 @@ class CompilerBaselineRunner extends RunnerBase {
             let createNewInstance = false;
 
             before(() => {
-                justName = fileName.replace(/^.*[\\\/]/, ''); // strips the fileName from the path.
+                justName = fileName.replace(/^.*[\\\/]/, ""); // strips the fileName from the path.
                 content = Harness.IO.readFile(fileName);
                 testCaseContent = Harness.TestCaseParser.makeUnitsFromTest(content, fileName);
                 units = testCaseContent.testUnitData;
                 tcSettings = testCaseContent.settings;
                 createNewInstance = false;
                 lastUnit = units[units.length - 1];
-                rootDir = lastUnit.originalFilePath.indexOf('conformance') === -1 ? 'tests/cases/compiler/' : lastUnit.originalFilePath.substring(0, lastUnit.originalFilePath.lastIndexOf('/')) + '/';
+                rootDir = lastUnit.originalFilePath.indexOf("conformance") === -1 ? "tests/cases/compiler/" : lastUnit.originalFilePath.substring(0, lastUnit.originalFilePath.lastIndexOf("/")) + "/";
                 harnessCompiler = Harness.Compiler.getCompiler();
                 // We need to assemble the list of input files for the compiler and other related files on the 'filesystem' (ie in a multi-file test)
                 // If the last file in a test uses require or a triple slash reference we'll assume all other files will be brought in via references,
@@ -106,7 +106,7 @@ class CompilerBaselineRunner extends RunnerBase {
                    eventually to remove this limitation. */
                 for (let i = 0; i < tcSettings.length; ++i) {
                     // noImplicitAny is passed to getCompiler, but target is just passed in the settings blob to setCompilerSettings
-                    if (!createNewInstance && (tcSettings[i].flag == "noimplicitany" || tcSettings[i].flag === 'target')) {
+                    if (!createNewInstance && (tcSettings[i].flag == "noimplicitany" || tcSettings[i].flag === "target")) {
                         harnessCompiler = Harness.Compiler.getCompiler();
                         harnessCompiler.setCompilerSettings(tcSettings);
                         createNewInstance = true;
@@ -148,9 +148,9 @@ class CompilerBaselineRunner extends RunnerBase {
             }
 
             // check errors
-            it('Correct errors for ' + fileName, () => {
+            it("Correct errors for " + fileName, () => {
                 if (this.errors) {
-                    Harness.Baseline.runBaseline('Correct errors for ' + fileName, justName.replace(/\.tsx?$/, '.errors.txt'), (): string => {
+                    Harness.Baseline.runBaseline("Correct errors for " + fileName, justName.replace(/\.tsx?$/, ".errors.txt"), (): string => {
                         if (result.errors.length === 0) return null;
                         return getErrorBaseline(toBeCompiled, otherFiles, result);
                     });
@@ -158,12 +158,12 @@ class CompilerBaselineRunner extends RunnerBase {
             });
 
             // Source maps?
-            it('Correct sourcemap content for ' + fileName, () => {
+            it("Correct sourcemap content for " + fileName, () => {
                 if (options.sourceMap || options.inlineSourceMap) {
-                    Harness.Baseline.runBaseline('Correct sourcemap content for ' + fileName, justName.replace(/\.tsx?$/, '.sourcemap.txt'), () => {
+                    Harness.Baseline.runBaseline("Correct sourcemap content for " + fileName, justName.replace(/\.tsx?$/, ".sourcemap.txt"), () => {
                         let record = result.getSourceMapRecord();
                         if (options.noEmitOnError && result.errors.length !== 0 && record === undefined) {
-                            // Because of the noEmitOnError option no files are created. We need to return null because baselining isn't required.
+                            // Because of the noEmitOnError option no files are created. We need to return null because baselining isn"t required.
                             return null;
                         }
                         return record;
@@ -171,35 +171,35 @@ class CompilerBaselineRunner extends RunnerBase {
                 }
             });
 
-            it('Correct JS output for ' + fileName, () => {
-                if (!ts.fileExtensionIs(lastUnit.name, '.d.ts') && this.emit) {
+            it("Correct JS output for " + fileName, () => {
+                if (!ts.fileExtensionIs(lastUnit.name, ".d.ts") && this.emit) {
                     if (result.files.length === 0 && result.errors.length === 0) {
-                        throw new Error('Expected at least one js file to be emitted or at least one error to be created.');
+                        throw new Error("Expected at least one js file to be emitted or at least one error to be created.");
                     }
 
                     // check js output
-                    Harness.Baseline.runBaseline('Correct JS output for ' + fileName, justName.replace(/\.tsx?/, '.js'), () => {
-                        let tsCode = '';
+                    Harness.Baseline.runBaseline("Correct JS output for " + fileName, justName.replace(/\.tsx?/, ".js"), () => {
+                        let tsCode = "";
                         let tsSources = otherFiles.concat(toBeCompiled);
                         if (tsSources.length > 1) {
-                            tsCode += '//// [' + fileName + '] ////\r\n\r\n';
+                            tsCode += "//// [" + fileName + "] ////\r\n\r\n";
                         }
                         for (let i = 0; i < tsSources.length; i++) {
-                            tsCode += '//// [' + Harness.Path.getFileName(tsSources[i].unitName) + ']\r\n';
-                            tsCode += tsSources[i].content + (i < (tsSources.length - 1) ? '\r\n' : '');
+                            tsCode += "//// [" + Harness.Path.getFileName(tsSources[i].unitName) + "]\r\n";
+                            tsCode += tsSources[i].content + (i < (tsSources.length - 1) ? "\r\n" : "");
                         }
 
-                        let jsCode = '';
+                        let jsCode = "";
                         for (let i = 0; i < result.files.length; i++) {
-                            jsCode += '//// [' + Harness.Path.getFileName(result.files[i].fileName) + ']\r\n';
+                            jsCode += "//// [" + Harness.Path.getFileName(result.files[i].fileName) + "]\r\n";
                             jsCode += getByteOrderMarkText(result.files[i]);
                             jsCode += result.files[i].code;
                         }
 
                         if (result.declFilesCode.length > 0) {
-                            jsCode += '\r\n\r\n';
+                            jsCode += "\r\n\r\n";
                             for (let i = 0; i < result.declFilesCode.length; i++) {
-                                jsCode += '//// [' + Harness.Path.getFileName(result.declFilesCode[i].fileName) + ']\r\n';
+                                jsCode += "//// [" + Harness.Path.getFileName(result.declFilesCode[i].fileName) + "]\r\n";
                                 jsCode += getByteOrderMarkText(result.declFilesCode[i]);
                                 jsCode += result.declFilesCode[i].code;
                             }
@@ -210,13 +210,13 @@ class CompilerBaselineRunner extends RunnerBase {
                         }, options);
 
                         if (declFileCompilationResult && declFileCompilationResult.declResult.errors.length) {
-                            jsCode += '\r\n\r\n//// [DtsFileErrors]\r\n';
-                            jsCode += '\r\n\r\n';
+                            jsCode += "\r\n\r\n//// [DtsFileErrors]\r\n";
+                            jsCode += "\r\n\r\n";
                             jsCode += getErrorBaseline(declFileCompilationResult.declInputFiles, declFileCompilationResult.declOtherFiles, declFileCompilationResult.declResult);
                         }
 
                         if (jsCode.length > 0) {
-                            return tsCode + '\r\n\r\n' + jsCode;
+                            return tsCode + "\r\n\r\n" + jsCode;
                         } else {
                             return null;
                         }
@@ -224,28 +224,28 @@ class CompilerBaselineRunner extends RunnerBase {
                 }
             });
 
-            it('Correct Sourcemap output for ' + fileName, () => {
+            it("Correct Sourcemap output for " + fileName, () => {
                 if (options.inlineSourceMap) {
                     if (result.sourceMaps.length > 0) {
-                        throw new Error('No sourcemap files should be generated if inlineSourceMaps was set.');
+                        throw new Error("No sourcemap files should be generated if inlineSourceMaps was set.");
                     }
                     return null;
                 }
                 else if (options.sourceMap) {
                     if (result.sourceMaps.length !== result.files.length) {
-                        throw new Error('Number of sourcemap files should be same as js files.');
+                        throw new Error("Number of sourcemap files should be same as js files.");
                     }
 
-                    Harness.Baseline.runBaseline('Correct Sourcemap output for ' + fileName, justName.replace(/\.tsx?/, '.js.map'), () => {
+                    Harness.Baseline.runBaseline("Correct Sourcemap output for " + fileName, justName.replace(/\.tsx?/, ".js.map"), () => {
                         if (options.noEmitOnError && result.errors.length !== 0 && result.sourceMaps.length === 0) {
                             // We need to return null here or the runBaseLine will actually create a empty file.
                             // Baselining isn't required here because there is no output.
                             return null;
                         }
 
-                        let sourceMapCode = '';
+                        let sourceMapCode = "";
                         for (let i = 0; i < result.sourceMaps.length; i++) {
-                            sourceMapCode += '//// [' + Harness.Path.getFileName(result.sourceMaps[i].fileName) + ']\r\n';
+                            sourceMapCode += "//// [" + Harness.Path.getFileName(result.sourceMaps[i].fileName) + "]\r\n";
                             sourceMapCode += getByteOrderMarkText(result.sourceMaps[i]);
                             sourceMapCode += result.sourceMaps[i].code;
                         }
@@ -255,7 +255,7 @@ class CompilerBaselineRunner extends RunnerBase {
                 }
             });
 
-            it('Correct type/symbol baselines for ' + fileName, () => {
+            it("Correct type/symbol baselines for " + fileName, () => {
                 if (fileName.indexOf("APISample") >= 0) {
                     return;
                 }
@@ -317,15 +317,15 @@ class CompilerBaselineRunner extends RunnerBase {
                         let fullBaseLine = generateBaseLine(fullResults, isSymbolBaseLine);
                         let pullBaseLine = generateBaseLine(pullResults, isSymbolBaseLine);
 
-                        let fullExtension = isSymbolBaseLine ? '.symbols' : '.types';
-                        let pullExtension = isSymbolBaseLine ? '.symbols.pull' : '.types.pull';
+                        let fullExtension = isSymbolBaseLine ? ".symbols" : ".types";
+                        let pullExtension = isSymbolBaseLine ? ".symbols.pull" : ".types.pull";
 
                         if (fullBaseLine !== pullBaseLine) {
-                            Harness.Baseline.runBaseline('Correct full information for ' + fileName, justName.replace(/\.tsx?/, fullExtension), () => fullBaseLine);
-                            Harness.Baseline.runBaseline('Correct pull information for ' + fileName, justName.replace(/\.tsx?/, pullExtension), () => pullBaseLine);
+                            Harness.Baseline.runBaseline("Correct full information for " + fileName, justName.replace(/\.tsx?/, fullExtension), () => fullBaseLine);
+                            Harness.Baseline.runBaseline("Correct pull information for " + fileName, justName.replace(/\.tsx?/, pullExtension), () => pullBaseLine);
                         }
                         else {
-                            Harness.Baseline.runBaseline('Correct information for ' + fileName, justName.replace(/\.tsx?/, fullExtension), () => fullBaseLine);
+                            Harness.Baseline.runBaseline("Correct information for " + fileName, justName.replace(/\.tsx?/, fullExtension), () => fullBaseLine);
                         }
                     }
 
@@ -334,7 +334,7 @@ class CompilerBaselineRunner extends RunnerBase {
                         let typeMap: { [fileName: string]: { [lineNum: number]: string[]; } } = {};
 
                         allFiles.forEach(file => {
-                            let codeLines = file.content.split('\n');
+                            let codeLines = file.content.split("\n");
                             typeWriterResults[file.unitName].forEach(result => {
                                 if (isSymbolBaseline && !result.symbol) {
                                     return;
@@ -354,30 +354,30 @@ class CompilerBaselineRunner extends RunnerBase {
                                 typeMap[file.unitName][result.line] = typeInfo;
                             });
 
-                            typeLines.push('=== ' + file.unitName + ' ===\r\n');
+                            typeLines.push("=== " + file.unitName + " ===\r\n");
                             for (let i = 0; i < codeLines.length; i++) {
                                 let currentCodeLine = codeLines[i];
-                                typeLines.push(currentCodeLine + '\r\n');
+                                typeLines.push(currentCodeLine + "\r\n");
                                 if (typeMap[file.unitName]) {
                                     let typeInfo = typeMap[file.unitName][i];
                                     if (typeInfo) {
                                         typeInfo.forEach(ty => {
-                                            typeLines.push('>' + ty + '\r\n');
+                                            typeLines.push(">" + ty + "\r\n");
                                         });
-                                        if (i + 1 < codeLines.length && (codeLines[i + 1].match(/^\s*[{|}]\s*$/) || codeLines[i + 1].trim() === '')) {
+                                        if (i + 1 < codeLines.length && (codeLines[i + 1].match(/^\s*[{|}]\s*$/) || codeLines[i + 1].trim() === "")) {
                                         }
                                         else {
-                                            typeLines.push('\r\n');
+                                            typeLines.push("\r\n");
                                         }
                                     }
                                 }
                                 else {
-                                    typeLines.push('No type information for this code.');
+                                    typeLines.push("No type information for this code.");
                                 }
                             }
                         });
 
-                        return typeLines.join('');
+                        return typeLines.join("");
                     }
                 }
             });
@@ -385,7 +385,7 @@ class CompilerBaselineRunner extends RunnerBase {
     }
 
     public initializeTests() {
-        describe(this.testSuiteName + ' tests', () => {
+        describe(this.testSuiteName + " tests", () => {
             describe("Setup compiler for compiler baselines", () => {
                 let harnessCompiler = Harness.Compiler.getCompiler();
                 this.parseOptions();
@@ -416,23 +416,23 @@ class CompilerBaselineRunner extends RunnerBase {
             this.decl = false;
             this.output = false;
 
-            let opts = this.options.split(',');
+            let opts = this.options.split(",");
             for (let i = 0; i < opts.length; i++) {
                 switch (opts[i]) {
-                    case 'error':
+                    case "error":
                         this.errors = true;
                         break;
-                    case 'emit':
+                    case "emit":
                         this.emit = true;
                         break;
-                    case 'decl':
+                    case "decl":
                         this.decl = true;
                         break;
-                    case 'output':
+                    case "output":
                         this.output = true;
                         break;
                     default:
-                        throw new Error('unsupported flag');
+                        throw new Error("unsupported flag");
                 }
             }
         }

src/harness/fourslashRunner.ts

@@ -1,10 +1,11 @@
-///<reference path='fourslash.ts' />
-///<reference path='harness.ts'/>
-///<reference path='runnerbase.ts' />
+///<reference path="fourslash.ts" />
+///<reference path="harness.ts"/>
+///<reference path="runnerbase.ts" />
 
 const enum FourSlashTestType {
     Native,
     Shims,
+    ShimsWithPreprocess,
     Server
 }
 
@@ -16,16 +17,20 @@ class FourSlashRunner extends RunnerBase {
         super();
         switch (testType) {
             case FourSlashTestType.Native:
-                this.basePath = 'tests/cases/fourslash';
-                this.testSuiteName = 'fourslash';
+                this.basePath = "tests/cases/fourslash";
+                this.testSuiteName = "fourslash";
                 break;
             case FourSlashTestType.Shims:
-                this.basePath = 'tests/cases/fourslash/shims';
-                this.testSuiteName = 'fourslash-shims';
+                this.basePath = "tests/cases/fourslash/shims";
+                this.testSuiteName = "fourslash-shims";
+                break;
+            case FourSlashTestType.ShimsWithPreprocess:
+                this.basePath = 'tests/cases/fourslash/shims-pp';
+                this.testSuiteName = 'fourslash-shims-pp';
                 break;
             case FourSlashTestType.Server:
-                this.basePath = 'tests/cases/fourslash/server';
-                this.testSuiteName = 'fourslash-server';
+                this.basePath = "tests/cases/fourslash/server";
+                this.testSuiteName = "fourslash-server";
                 break;
         }
     }
@@ -35,25 +40,25 @@ class FourSlashRunner extends RunnerBase {
             this.tests = this.enumerateFiles(this.basePath, /\.ts/i, { recursive: false });
         }
 
-        describe(this.testSuiteName + ' tests', () => {
+        describe(this.testSuiteName + " tests", () => {
             this.tests.forEach((fn: string) => {
                  describe(fn, () => {
                        fn = ts.normalizeSlashes(fn);
-                        let justName = fn.replace(/^.*[\\\/]/, '');
+                        let justName = fn.replace(/^.*[\\\/]/, "");
 
                         // Convert to relative path
-                        let testIndex = fn.indexOf('tests/');
+                        let testIndex = fn.indexOf("tests/");
                         if (testIndex >= 0) fn = fn.substr(testIndex);
 
                         if (justName && !justName.match(/fourslash\.ts$/i) && !justName.match(/\.d\.ts$/i)) {
-                            it(this.testSuiteName + ' test ' + justName + ' runs correctly', () => {
+                            it(this.testSuiteName + " test " + justName + " runs correctly", () => {
                                 FourSlash.runFourSlashTest(this.basePath, this.testType, fn);
                         });
                     }
                 });
             });
 
-            describe('Generate Tao XML', () => {
+            describe("Generate Tao XML", () => {
                 let invalidReasons: any = {};
                 FourSlash.xmlData.forEach(xml => {
                     if (xml.invalidReason !== null) {
@@ -69,37 +74,37 @@ class FourSlashRunner extends RunnerBase {
                 invalidReport.sort((lhs, rhs) => lhs.count > rhs.count ? -1 : lhs.count === rhs.count ? 0 : 1);
 
                 let lines: string[] = [];
-                lines.push('<!-- Blocked Test Report');
+                lines.push("<!-- Blocked Test Report");
                 invalidReport.forEach((reasonAndCount) => {
-                    lines.push(reasonAndCount.count + ' tests blocked by ' + reasonAndCount.reason);
+                    lines.push(reasonAndCount.count + " tests blocked by " + reasonAndCount.reason);
                 });
-                lines.push('-->');
-                lines.push('<TaoTest xmlns="http://microsoft.com/schemas/VSLanguages/TAO">');
-                lines.push('    <InitTest>');
-                lines.push('        <StartTarget />');
-                lines.push('    </InitTest>');
-                lines.push('    <ScenarioList>');
+                lines.push("-->");
+                lines.push("<TaoTest xmlns=\"http://microsoft.com/schemas/VSLanguages/TAO\">");
+                lines.push("    <InitTest>");
+                lines.push("        <StartTarget />");
+                lines.push("    </InitTest>");
+                lines.push("    <ScenarioList>");
                 FourSlash.xmlData.forEach(xml => {
                     if (xml.invalidReason !== null) {
-                        lines.push('<!-- Skipped ' + xml.originalName + ', reason: ' + xml.invalidReason + ' -->');
+                        lines.push("<!-- Skipped " + xml.originalName + ", reason: " + xml.invalidReason + " -->");
                     } else {
-                        lines.push('        <Scenario Name="' + xml.originalName + '">');
+                        lines.push("        <Scenario Name=\"" + xml.originalName + "\">");
                         xml.actions.forEach(action => {
-                            lines.push('            ' + action);
+                            lines.push("            " + action);
                         });
-                        lines.push('        </Scenario>');
+                        lines.push("        </Scenario>");
                     }
                 });
-                lines.push('    </ScenarioList>');
-                lines.push('    <CleanupScenario>');
-                lines.push('        <CloseAllDocuments />');
-                lines.push('        <CleanupCreatedFiles />');
-                lines.push('    </CleanupScenario>');
-                lines.push('    <CleanupTest>');
-                lines.push('        <CloseTarget />');
-                lines.push('    </CleanupTest>');
-                lines.push('</TaoTest>');
-                Harness.IO.writeFile('built/local/fourslash.xml', lines.join('\r\n'));
+                lines.push("    </ScenarioList>");
+                lines.push("    <CleanupScenario>");
+                lines.push("        <CloseAllDocuments />");
+                lines.push("        <CleanupCreatedFiles />");
+                lines.push("    </CleanupScenario>");
+                lines.push("    <CleanupTest>");
+                lines.push("        <CloseTarget />");
+                lines.push("    </CleanupTest>");
+                lines.push("</TaoTest>");
+                Harness.IO.writeFile("built/local/fourslash.xml", lines.join("\r\n"));
             });
         });
     }
@@ -108,6 +113,6 @@ class FourSlashRunner extends RunnerBase {
 class GeneratedFourslashRunner extends FourSlashRunner {
     constructor(testType: FourSlashTestType) {
         super(testType);
-        this.basePath += '/generated/';
+        this.basePath += "/generated/";
     }
 }

src/harness/harness.ts

@@ -14,24 +14,27 @@
 // limitations under the License.
 //
 
-/// <reference path='..\services\services.ts' />
-/// <reference path='..\services\shims.ts' />
-/// <reference path='..\server\session.ts' />
-/// <reference path='..\server\client.ts' />
-/// <reference path='..\server\node.d.ts' />
-/// <reference path='external\mocha.d.ts'/>
-/// <reference path='external\chai.d.ts'/>
-/// <reference path='sourceMapRecorder.ts'/>
-/// <reference path='runnerbase.ts'/>
+/// <reference path="..\services\services.ts" />
+/// <reference path="..\services\shims.ts" />
+/// <reference path="..\server\session.ts" />
+/// <reference path="..\server\client.ts" />
+/// <reference path="..\server\node.d.ts" />
+/// <reference path="external\mocha.d.ts"/>
+/// <reference path="external\chai.d.ts"/>
+/// <reference path="sourceMapRecorder.ts"/>
+/// <reference path="runnerbase.ts"/>
 
-var Buffer: BufferConstructor = require('buffer').Buffer;
+// Block scoped definitions work poorly for global variables, temporarily enable var
+/* tslint:disable:no-var-keyword */
+var Buffer: BufferConstructor = require("buffer").Buffer;
 
 // this will work in the browser via browserify
-var _chai: typeof chai = require('chai');
+var _chai: typeof chai = require("chai");
 var assert: typeof _chai.assert = _chai.assert;
 var expect: typeof _chai.expect = _chai.expect;
 declare var __dirname: string; // Node-specific
 var global = <any>Function("return this").call(null);
+/* tslint:enable:no-var-keyword */
 
 module Utils {
     // Setup some globals based on the current environment
@@ -63,7 +66,7 @@ module Utils {
                 eval(fileContents);
                 break;
             case ExecutionEnvironment.Node:
-                let vm = require('vm');
+                let vm = require("vm");
                 if (nodeContext) {
                     vm.runInNewContext(fileContents, nodeContext, fileName);
                 } else {
@@ -71,7 +74,7 @@ module Utils {
                 }
                 break;
             default:
-                throw new Error('Unknown context');
+                throw new Error("Unknown context");
         }
     }
 
@@ -80,9 +83,9 @@ module Utils {
         // Split up the input file by line
         // Note: IE JS engine incorrectly handles consecutive delimiters here when using RegExp split, so
         // we have to use string-based splitting instead and try to figure out the delimiting chars
-        let lines = content.split('\r\n');
+        let lines = content.split("\r\n");
         if (lines.length === 1) {
-            lines = content.split('\n');
+            lines = content.split("\n");
 
             if (lines.length === 1) {
                 lines = content.split("\r");
@@ -93,7 +96,7 @@ module Utils {
 
     /** Reads a file under /tests */
     export function readTestFile(path: string) {
-        if (path.indexOf('tests') < 0) {
+        if (path.indexOf("tests") < 0) {
             path = "tests/" + path;
         }
 
@@ -388,7 +391,7 @@ module Utils {
 
 module Harness.Path {
     export function getFileName(fullPath: string) {
-        return fullPath.replace(/^.*[\\\/]/, '');
+        return fullPath.replace(/^.*[\\\/]/, "");
     }
 
     export function filePath(fullPath: string) {
@@ -412,6 +415,7 @@ module Harness {
         log(text: string): void;
         getMemoryUsage?(): number;
     }
+    export var IO: IO;
 
     module IOImpl {
         declare class Enumerator {
@@ -484,8 +488,8 @@ module Harness {
             declare let require: any;
             let fs: any, pathModule: any;
             if (require) {
-                fs = require('fs');
-                pathModule = require('path');
+                fs = require("fs");
+                pathModule = require("path");
             } else {
                 fs = pathModule = {};
             }
@@ -493,7 +497,7 @@ module Harness {
             export let readFile: typeof IO.readFile = ts.sys.readFile;
             export let writeFile: typeof IO.writeFile = ts.sys.writeFile;
             export let fileExists: typeof IO.fileExists = fs.existsSync;
-            export let log: typeof IO.log = console.log;
+            export let log: typeof IO.log = s => console.log(s);
 
             export function createDirectory(path: string) {
                 if (!directoryExists(path)) {
@@ -559,8 +563,8 @@ module Harness {
             let serverRoot = "http://localhost:8888/";
 
             // Unused?
-            let newLine = '\r\n';
-            let currentDirectory = () => '';
+            let newLine = "\r\n";
+            let currentDirectory = () => "";
             let supportsCodePage = () => false;
 
             module Http {
@@ -606,9 +610,9 @@ module Harness {
                 export function writeToServerSync(url: string, action: string, contents?: string): XHRResponse {
                     let xhr = new XMLHttpRequest();
                     try {
-                        let actionMsg = '?action=' + action;
-                        xhr.open('POST', url + actionMsg, false);
-                        xhr.setRequestHeader('Access-Control-Allow-Origin', '*');
+                        let actionMsg = "?action=" + action;
+                        xhr.open("POST", url + actionMsg, false);
+                        xhr.setRequestHeader("Access-Control-Allow-Origin", "*");
                         xhr.send(contents);
                     }
                     catch (e) {
@@ -624,7 +628,7 @@ module Harness {
             }
 
             export function deleteFile(path: string) {
-                Http.writeToServerSync(serverRoot + path, 'DELETE', null);
+                Http.writeToServerSync(serverRoot + path, "DELETE", null);
             }
 
             export function directoryExists(path: string): boolean {
@@ -637,15 +641,15 @@ module Harness {
                 if (dirPath.match(/localhost:\d+$/) || dirPath.match(/localhost:\d+\/$/)) {
                     dirPath = null;
                     // path + fileName
-                } else if (dirPath.indexOf('.') === -1) {
-                    dirPath = dirPath.substring(0, dirPath.lastIndexOf('/'));
+                } else if (dirPath.indexOf(".") === -1) {
+                    dirPath = dirPath.substring(0, dirPath.lastIndexOf("/"));
                     // path
                 } else {
                     // strip any trailing slash
                     if (dirPath.match(/.*\/$/)) {
                         dirPath = dirPath.substring(0, dirPath.length - 2);
                     }
-                    dirPath = dirPath.substring(0, dirPath.lastIndexOf('/'));
+                    dirPath = dirPath.substring(0, dirPath.lastIndexOf("/"));
                 }
 
                 return dirPath;
@@ -660,7 +664,7 @@ module Harness {
             export function _listFilesImpl(path: string, spec?: RegExp, options?: any) {
                 let response = Http.getFileFromServerSync(serverRoot + path);
                 if (response.status === 200) {
-                    let results = response.responseText.split(',');
+                    let results = response.responseText.split(",");
                     if (spec) {
                         return results.filter(file => spec.test(file));
                     } else {
@@ -668,12 +672,12 @@ module Harness {
                     }
                 }
                 else {
-                    return [''];
+                    return [""];
                 }
             };
             export let listFiles = Utils.memoize(_listFilesImpl);
 
-            export let log = console.log;
+            export let log = (s: string) => console.log(s);
 
             export function readFile(file: string) {
                 let response = Http.getFileFromServerSync(serverRoot + file);
@@ -685,12 +689,11 @@ module Harness {
             }
 
             export function writeFile(path: string, contents: string) {
-                Http.writeToServerSync(serverRoot + path, 'WRITE', contents);
+                Http.writeToServerSync(serverRoot + path, "WRITE", contents);
             }
         }
     }
 
-    export var IO: IO;
     switch (Utils.getExecutionEnvironment()) {
         case Utils.ExecutionEnvironment.CScript:
             IO = IOImpl.CScript;
@@ -722,7 +725,7 @@ module Harness {
             tcServicesFileName = "built/local/typescriptServices.js";
             break;
         default:
-            throw new Error('Unknown context');
+            throw new Error("Unknown context");
     }
     export let tcServicesFile = IO.readFile(tcServicesFileName);
 
@@ -745,12 +748,12 @@ module Harness {
 
             public Write(str: string) {
                 // out of memory usage concerns avoid using + or += if we're going to do any manipulation of this string later
-                this.currentLine = [(this.currentLine || ''), str].join('');
+                this.currentLine = [(this.currentLine || ""), str].join("");
             }
 
             public WriteLine(str: string) {
                 // out of memory usage concerns avoid using + or += if we're going to do any manipulation of this string later
-                this.lines.push([(this.currentLine || ''), str].join(''));
+                this.lines.push([(this.currentLine || ""), str].join(""));
                 this.currentLine = undefined;
             }
 
@@ -799,7 +802,7 @@ module Harness {
                     if (this.fileCollection.hasOwnProperty(p)) {
                         let current = <Harness.Compiler.WriterAggregator>this.fileCollection[p];
                         if (current.lines.length > 0) {
-                            if (p.indexOf('.d.ts') !== -1) { current.lines.unshift(['////[', Path.getFileName(p), ']'].join('')); }
+                            if (p.indexOf(".d.ts") !== -1) { current.lines.unshift(["////[", Path.getFileName(p), "]"].join("")); }
                             result.push({ fileName: p, file: this.fileCollection[p] });
                         }
                     }
@@ -828,12 +831,12 @@ module Harness {
         const carriageReturnLineFeed = "\r\n";
         const lineFeed = "\n";
 
-        export let defaultLibFileName = 'lib.d.ts';
-        export let defaultLibSourceFile = createSourceFileAndAssertInvariants(defaultLibFileName, IO.readFile(libFolder + 'lib.core.d.ts'), /*languageVersion*/ ts.ScriptTarget.Latest);
-        export let defaultES6LibSourceFile = createSourceFileAndAssertInvariants(defaultLibFileName, IO.readFile(libFolder + 'lib.core.es6.d.ts'), /*languageVersion*/ ts.ScriptTarget.Latest);
+        export let defaultLibFileName = "lib.d.ts";
+        export let defaultLibSourceFile = createSourceFileAndAssertInvariants(defaultLibFileName, IO.readFile(libFolder + "lib.core.d.ts"), /*languageVersion*/ ts.ScriptTarget.Latest);
+        export let defaultES6LibSourceFile = createSourceFileAndAssertInvariants(defaultLibFileName, IO.readFile(libFolder + "lib.core.es6.d.ts"), /*languageVersion*/ ts.ScriptTarget.Latest);
 
         // Cache these between executions so we don't have to re-parse them for every test
-        export let fourslashFileName = 'fourslash.ts';
+        export let fourslashFileName = "fourslash.ts";
         export let fourslashSourceFile: ts.SourceFile;
 
         export function getCanonicalFileName(fileName: string): string {
@@ -865,6 +868,29 @@ module Harness {
                 }
             };
             inputFiles.forEach(register);
+            
+            function getSourceFile(fn: string, languageVersion: ts.ScriptTarget) {
+                fn = ts.normalizePath(fn);
+                if (Object.prototype.hasOwnProperty.call(filemap, getCanonicalFileName(fn))) {
+                    return filemap[getCanonicalFileName(fn)];
+                }
+                else if (currentDirectory) {
+                    let canonicalAbsolutePath = getCanonicalFileName(ts.getNormalizedAbsolutePath(fn, currentDirectory));
+                    return Object.prototype.hasOwnProperty.call(filemap, getCanonicalFileName(canonicalAbsolutePath)) ? filemap[canonicalAbsolutePath] : undefined;
+                }
+                else if (fn === fourslashFileName) {
+                    let tsFn = "tests/cases/fourslash/" + fourslashFileName;
+                    fourslashSourceFile = fourslashSourceFile || createSourceFileAndAssertInvariants(tsFn, Harness.IO.readFile(tsFn), scriptTarget);
+                    return fourslashSourceFile;
+                }
+                else {
+                    if (fn === defaultLibFileName) {
+                        return languageVersion === ts.ScriptTarget.ES6 ? defaultES6LibSourceFile : defaultLibSourceFile;
+                    }
+                    // Don't throw here -- the compiler might be looking for a test that actually doesn't exist as part of the TC
+                    return undefined;
+                }
+            }
 
             let newLine =
                 newLineKind === ts.NewLineKind.CarriageReturnLineFeed ? carriageReturnLineFeed :
@@ -873,33 +899,14 @@ module Harness {
 
             return {
                 getCurrentDirectory,
-                getSourceFile: (fn, languageVersion) => {
-                    fn = ts.normalizePath(fn);
-                    if (Object.prototype.hasOwnProperty.call(filemap, getCanonicalFileName(fn))) {
-                        return filemap[getCanonicalFileName(fn)];
-                    }
-                    else if (currentDirectory) {
-                        let canonicalAbsolutePath = getCanonicalFileName(ts.getNormalizedAbsolutePath(fn, currentDirectory));
-                        return Object.prototype.hasOwnProperty.call(filemap, getCanonicalFileName(canonicalAbsolutePath)) ? filemap[canonicalAbsolutePath] : undefined;
-                    }
-                    else if (fn === fourslashFileName) {
-                        let tsFn = 'tests/cases/fourslash/' + fourslashFileName;
-                        fourslashSourceFile = fourslashSourceFile || createSourceFileAndAssertInvariants(tsFn, Harness.IO.readFile(tsFn), scriptTarget);
-                        return fourslashSourceFile;
-                    }
-                    else {
-                        if (fn === defaultLibFileName) {
-                            return languageVersion === ts.ScriptTarget.ES6 ? defaultES6LibSourceFile : defaultLibSourceFile;
-                        }
-                        // Don't throw here -- the compiler might be looking for a test that actually doesn't exist as part of the TC
-                        return undefined;
-                    }
-                },
+                getSourceFile,
                 getDefaultLibFileName: options => defaultLibFileName,
                 writeFile,
                 getCanonicalFileName,
                 useCaseSensitiveFileNames: () => useCaseSensitiveFileNames,
-                getNewLine: () => newLine
+                getNewLine: () => newLine,
+                fileExists: fileName => getSourceFile(fileName, ts.ScriptTarget.ES5) !== undefined,
+                readFile: (fileName: string): string => { throw new Error("NotYetImplemented"); }
             };
         }
 
@@ -974,7 +981,7 @@ module Harness {
                     settingsCallback(null);
                 }
 
-                let newLine = '\r\n';
+                let newLine = "\r\n";
                 options.skipDefaultLibCheck = true;
 
                 // Files from built\local that are requested by test "@includeBuiltFiles" to be in the context.
@@ -1011,19 +1018,19 @@ module Harness {
                         // "fileName", "comments", "declaration", "module", "nolib", "sourcemap", "target", "out", "outdir", "noimplicitany", "noresolve"
                         case "module":
                         case "modulegentarget":
-                            if (typeof setting.value === 'string') {
-                                if (setting.value.toLowerCase() === 'amd') {
+                            if (typeof setting.value === "string") {
+                                if (setting.value.toLowerCase() === "amd") {
                                     options.module = ts.ModuleKind.AMD;
-                                } else if (setting.value.toLowerCase() === 'umd') {
+                                } else if (setting.value.toLowerCase() === "umd") {
                                     options.module = ts.ModuleKind.UMD;
-                                } else if (setting.value.toLowerCase() === 'commonjs') {
+                                } else if (setting.value.toLowerCase() === "commonjs") {
                                     options.module = ts.ModuleKind.CommonJS;
-                                } else if (setting.value.toLowerCase() === 'system') {
+                                } else if (setting.value.toLowerCase() === "system") {
                                     options.module = ts.ModuleKind.System;
-                                } else if (setting.value.toLowerCase() === 'unspecified') {
+                                } else if (setting.value.toLowerCase() === "unspecified") {
                                     options.module = ts.ModuleKind.None;
                                 } else {
-                                    throw new Error('Unknown module type ' + setting.value);
+                                    throw new Error("Unknown module type " + setting.value);
                                 }
                             } else {
                                 options.module = <any>setting.value;
@@ -1031,152 +1038,152 @@ module Harness {
                             break;
 
                         case "target":
-                        case 'codegentarget':
-                            if (typeof setting.value === 'string') {
-                                if (setting.value.toLowerCase() === 'es3') {
+                        case "codegentarget":
+                            if (typeof setting.value === "string") {
+                                if (setting.value.toLowerCase() === "es3") {
                                     options.target = ts.ScriptTarget.ES3;
-                                } else if (setting.value.toLowerCase() === 'es5') {
+                                } else if (setting.value.toLowerCase() === "es5") {
                                     options.target = ts.ScriptTarget.ES5;
-                                } else if (setting.value.toLowerCase() === 'es6') {
+                                } else if (setting.value.toLowerCase() === "es6") {
                                     options.target = ts.ScriptTarget.ES6;
                                 } else {
-                                    throw new Error('Unknown compile target ' + setting.value);
+                                    throw new Error("Unknown compile target " + setting.value);
                                 }
                             } else {
                                 options.target = <any>setting.value;
                             }
                             break;
                             
-                        case 'experimentaldecorators':
-                            options.experimentalDecorators = setting.value === 'true';
+                        case "experimentaldecorators":
+                            options.experimentalDecorators = setting.value === "true";
                             break;
 
-                        case 'emitdecoratormetadata':
-                            options.emitDecoratorMetadata = setting.value === 'true';
+                        case "emitdecoratormetadata":
+                            options.emitDecoratorMetadata = setting.value === "true";
                             break;
                             
-                        case 'experimentalasyncfunctions':
-                            options.experimentalAsyncFunctions = setting.value === 'true';
+                        case "experimentalasyncfunctions":
+                            options.experimentalAsyncFunctions = setting.value === "true";
                             break;
 
-                        case 'noemithelpers':
-                            options.noEmitHelpers = setting.value === 'true';
+                        case "noemithelpers":
+                            options.noEmitHelpers = setting.value === "true";
                             break;
 
-                        case 'noemitonerror':
-                            options.noEmitOnError = setting.value === 'true';
+                        case "noemitonerror":
+                            options.noEmitOnError = setting.value === "true";
                             break;
 
-                        case 'noresolve':
-                            options.noResolve = setting.value === 'true';
+                        case "noresolve":
+                            options.noResolve = setting.value === "true";
                             break;
 
-                        case 'noimplicitany':
-                            options.noImplicitAny = setting.value === 'true';
+                        case "noimplicitany":
+                            options.noImplicitAny = setting.value === "true";
                             break;
 
-                        case 'nolib':
-                            options.noLib = setting.value === 'true';
+                        case "nolib":
+                            options.noLib = setting.value === "true";
                             break;
 
-                        case 'out':
-                        case 'outfileoption':
+                        case "out":
+                        case "outfileoption":
                             options.out = setting.value;
                             break;
 
-                        case 'outdiroption':
-                        case 'outdir':
+                        case "outdiroption":
+                        case "outdir":
                             options.outDir = setting.value;
                             break;
 
-                        case 'skipdefaultlibcheck':
+                        case "skipdefaultlibcheck":
                             options.skipDefaultLibCheck = setting.value === "true";
                             break;
 
-                        case 'sourceroot':
+                        case "sourceroot":
                             options.sourceRoot = setting.value;
                             break;
 
-                        case 'maproot':
+                        case "maproot":
                             options.mapRoot = setting.value;
                             break;
 
-                        case 'sourcemap':
-                            options.sourceMap = setting.value === 'true';
+                        case "sourcemap":
+                            options.sourceMap = setting.value === "true";
                             break;
 
-                        case 'declaration':
-                            options.declaration = setting.value === 'true';
+                        case "declaration":
+                            options.declaration = setting.value === "true";
                             break;
 
-                        case 'newline':
-                            if (setting.value.toLowerCase() === 'crlf') {
+                        case "newline":
+                            if (setting.value.toLowerCase() === "crlf") {
                                 options.newLine = ts.NewLineKind.CarriageReturnLineFeed;
                             }
-                            else if (setting.value.toLowerCase() === 'lf') {
+                            else if (setting.value.toLowerCase() === "lf") {
                                 options.newLine = ts.NewLineKind.LineFeed;
                             }
                             else {
-                                throw new Error('Unknown option for newLine: ' + setting.value);
+                                throw new Error("Unknown option for newLine: " + setting.value);
                             }
                             break;
 
-                        case 'comments':
-                            options.removeComments = setting.value === 'false';
+                        case "comments":
+                            options.removeComments = setting.value === "false";
                             break;
 
-                        case 'stripinternal':
-                            options.stripInternal = setting.value === 'true';
+                        case "stripinternal":
+                            options.stripInternal = setting.value === "true";
 
-                        case 'usecasesensitivefilenames':
-                            useCaseSensitiveFileNames = setting.value === 'true';
+                        case "usecasesensitivefilenames":
+                            useCaseSensitiveFileNames = setting.value === "true";
                             break;
 
-                        case 'filename':
+                        case "filename":
                             // Not supported yet
                             break;
 
-                        case 'emitbom':
-                            options.emitBOM = setting.value === 'true';
+                        case "emitbom":
+                            options.emitBOM = setting.value === "true";
                             break;
 
-                        case 'errortruncation':
-                            options.noErrorTruncation = setting.value === 'false';
+                        case "errortruncation":
+                            options.noErrorTruncation = setting.value === "false";
                             break;
 
-                        case 'preserveconstenums':
-                            options.preserveConstEnums = setting.value === 'true';
+                        case "preserveconstenums":
+                            options.preserveConstEnums = setting.value === "true";
                             break;
 
-                        case 'isolatedmodules':
-                            options.isolatedModules = setting.value === 'true';
+                        case "isolatedmodules":
+                            options.isolatedModules = setting.value === "true";
                             break;
 
-                        case 'suppressimplicitanyindexerrors':
-                            options.suppressImplicitAnyIndexErrors = setting.value === 'true';
+                        case "suppressimplicitanyindexerrors":
+                            options.suppressImplicitAnyIndexErrors = setting.value === "true";
                             break;
 
-                        case 'includebuiltfile':
+                        case "includebuiltfile":
                             let builtFileName = libFolder + setting.value;
                             includeBuiltFiles.push({ unitName: builtFileName, content: normalizeLineEndings(IO.readFile(builtFileName), newLine) });
                             break;
 
-                        case 'inlinesourcemap':
-                            options.inlineSourceMap = setting.value === 'true';
+                        case "inlinesourcemap":
+                            options.inlineSourceMap = setting.value === "true";
                             break;
 
-                        case 'inlinesources':
-                            options.inlineSources = setting.value === 'true';
+                        case "inlinesources":
+                            options.inlineSources = setting.value === "true";
                             break;
 
-                        case 'jsx':
-                            options.jsx = setting.value.toLowerCase() === 'react' ? ts.JsxEmit.React :
-                                          setting.value.toLowerCase() === 'preserve' ? ts.JsxEmit.Preserve :
+                        case "jsx":
+                            options.jsx = setting.value.toLowerCase() === "react" ? ts.JsxEmit.React :
+                                          setting.value.toLowerCase() === "preserve" ? ts.JsxEmit.Preserve :
                                           ts.JsxEmit.None;
                             break;
 
                         default:
-                            throw new Error('Unsupported compiler setting ' + setting.flag);
+                            throw new Error("Unsupported compiler setting " + setting.flag);
                     }
                 }
             }
@@ -1189,7 +1196,7 @@ module Harness {
                 // Current directory is needed for rwcRunner to be able to use currentDirectory defined in json file
                 currentDirectory?: string) {
                 if (options.declaration && result.errors.length === 0 && result.declFilesCode.length !== result.files.length) {
-                    throw new Error('There were no errors and declFiles generated did not match number of js files generated');
+                    throw new Error("There were no errors and declFiles generated did not match number of js files generated");
                 }
 
                 let declInputFiles: { unitName: string; content: string }[] = [];
@@ -1250,8 +1257,8 @@ module Harness {
         }
 
         function normalizeLineEndings(text: string, lineEnding: string): string {
-            let normalized = text.replace(/\r\n?/g, '\n');
-            if (lineEnding !== '\n') {
+            let normalized = text.replace(/\r\n?/g, "\n");
+            if (lineEnding !== "\n") {
                 normalized = normalized.replace(/\n/g, lineEnding);
             }
             return normalized;
@@ -1282,10 +1289,10 @@ module Harness {
                 let message = ts.flattenDiagnosticMessageText(error.messageText, ts.sys.newLine);
 
                 let errLines = RunnerBase.removeFullPaths(message)
-                    .split('\n')
-                    .map(s => s.length > 0 && s.charAt(s.length - 1) === '\r' ? s.substr(0, s.length - 1) : s)
+                    .split("\n")
+                    .map(s => s.length > 0 && s.charAt(s.length - 1) === "\r" ? s.substr(0, s.length - 1) : s)
                     .filter(s => s.length > 0)
-                    .map(s => '!!! ' + ts.DiagnosticCategory[error.category].toLowerCase() + " TS" + error.code + ": " + s);
+                    .map(s => "!!! " + ts.DiagnosticCategory[error.category].toLowerCase() + " TS" + error.code + ": " + s);
                 errLines.forEach(e => outputLines.push(e));
 
                 totalErrorsReported++;
@@ -1305,7 +1312,7 @@ module Harness {
 
 
                 // Header
-                outputLines.push('==== ' + inputFile.unitName + ' (' + fileErrors.length + ' errors) ====');
+                outputLines.push("==== " + inputFile.unitName + " (" + fileErrors.length + " errors) ====");
 
                 // Make sure we emit something for every error
                 let markedErrorCount = 0;
@@ -1314,13 +1321,13 @@ module Harness {
                 // we have to string-based splitting instead and try to figure out the delimiting chars
 
                 let lineStarts = ts.computeLineStarts(inputFile.content);
-                let lines = inputFile.content.split('\n');
+                let lines = inputFile.content.split("\n");
                 if (lines.length === 1) {
                     lines = lines[0].split("\r");
                 }
 
                 lines.forEach((line, lineIndex) => {
-                    if (line.length > 0 && line.charAt(line.length - 1) === '\r') {
+                    if (line.length > 0 && line.charAt(line.length - 1) === "\r") {
                         line = line.substr(0, line.length - 1);
                     }
 
@@ -1333,7 +1340,7 @@ module Harness {
                         nextLineStart = lineStarts[lineIndex + 1];
                     }
                     // Emit this line from the original file
-                    outputLines.push('    ' + line);
+                    outputLines.push("    " + line);
                     fileErrors.forEach(err => {
                         // Does any error start or continue on to this line? Emit squiggles
                         let end = ts.textSpanEnd(err);
@@ -1345,7 +1352,7 @@ module Harness {
                             // Calculate the start of the squiggle
                             let squiggleStart = Math.max(0, relativeOffset);
                             // TODO/REVIEW: this doesn't work quite right in the browser if a multi file test has files whose names are just the right length relative to one another
-                            outputLines.push('    ' + line.substr(0, squiggleStart).replace(/[^\s]/g, ' ') + new Array(Math.min(length, line.length - squiggleStart) + 1).join('~'));
+                            outputLines.push("    " + line.substr(0, squiggleStart).replace(/[^\s]/g, " ") + new Array(Math.min(length, line.length - squiggleStart) + 1).join("~"));
 
                             // If the error ended here, or we're at the end of the file, emit its message
                             if ((lineIndex === lines.length - 1) || nextLineStart > end) {
@@ -1360,7 +1367,7 @@ module Harness {
                 });
 
                 // Verify we didn't miss any errors in this file
-                assert.equal(markedErrorCount, fileErrors.length, 'count of errors in ' + inputFile.unitName);
+                assert.equal(markedErrorCount, fileErrors.length, "count of errors in " + inputFile.unitName);
             });
 
             let numLibraryDiagnostics = ts.countWhere(diagnostics, diagnostic => {
@@ -1373,10 +1380,10 @@ module Harness {
             });
 
             // Verify we didn't miss any errors in total
-            assert.equal(totalErrorsReported + numLibraryDiagnostics + numTest262HarnessDiagnostics, diagnostics.length, 'total number of errors');
+            assert.equal(totalErrorsReported + numLibraryDiagnostics + numTest262HarnessDiagnostics, diagnostics.length, "total number of errors");
 
             return minimalDiagnosticsToString(diagnostics) +
-                ts.sys.newLine + ts.sys.newLine + outputLines.join('\r\n');
+                ts.sys.newLine + ts.sys.newLine + outputLines.join("\r\n");
         }
 
         export function collateOutputs(outputFiles: Harness.Compiler.GeneratedFile[]): string {
@@ -1384,15 +1391,15 @@ module Harness {
             outputFiles.sort((a, b) => cleanName(a.fileName).localeCompare(cleanName(b.fileName)));
 
             // Emit them
-            let result = '';
+            let result = "";
             for (let outputFile of outputFiles) {
                 // Some extra spacing if this isn't the first file
                 if (result.length) {
-                    result += '\r\n\r\n';
+                    result += "\r\n\r\n";
                 }
 
                 // FileName header + content
-                result += '/*====== ' + outputFile.fileName + ' ======*/\r\n';
+                result += "/*====== " + outputFile.fileName + " ======*/\r\n";
                 
                 result += outputFile.code;
             }
@@ -1400,7 +1407,7 @@ module Harness {
             return result;
 
             function cleanName(fn: string) {
-                let lastSlash = ts.normalizeSlashes(fn).lastIndexOf('/');
+                let lastSlash = ts.normalizeSlashes(fn).lastIndexOf("/");
                 return fn.substr(lastSlash + 1).toLowerCase();
             }
         }
@@ -1418,7 +1425,7 @@ module Harness {
         // This does not need to exist strictly speaking, but many tests will need to be updated if it's removed
         export function compileString(code: string, unitName: string, callback: (result: CompilerResult) => void) {
             // NEWTODO: Re-implement 'compileString'
-            throw new Error('compileString NYI');
+            throw new Error("compileString NYI");
         }
 
         export interface GeneratedFile {
@@ -1432,26 +1439,26 @@ module Harness {
         }
 
         export function isTS(fileName: string) {
-            return stringEndsWith(fileName, '.ts');
+            return stringEndsWith(fileName, ".ts");
         }
 
         export function isTSX(fileName: string) {
-            return stringEndsWith(fileName, '.tsx');
+            return stringEndsWith(fileName, ".tsx");
         }
 
         export function isDTS(fileName: string) {
-            return stringEndsWith(fileName, '.d.ts');
+            return stringEndsWith(fileName, ".d.ts");
         }
 
         export function isJS(fileName: string) {
-            return stringEndsWith(fileName, '.js');
+            return stringEndsWith(fileName, ".js");
         }
         export function isJSX(fileName: string) {
-            return stringEndsWith(fileName, '.jsx');
+            return stringEndsWith(fileName, ".jsx");
         }
 
         export function isJSMap(fileName: string) {
-            return stringEndsWith(fileName, '.js.map');
+            return stringEndsWith(fileName, ".js.map") || stringEndsWith(fileName, ".jsx.map");
         }
 
         /** Contains the code and errors of a compilation and some helper methods to check its status. */
@@ -1478,7 +1485,7 @@ module Harness {
                         this.sourceMaps.push(emittedFile);
                     }
                     else {
-                        throw new Error('Unrecognized file extension for file ' + emittedFile.fileName);
+                        throw new Error("Unrecognized file extension for file " + emittedFile.fileName);
                     }
                 });
 
@@ -1587,10 +1594,10 @@ module Harness {
                     // Subfile content line
                     // Append to the current subfile content, inserting a newline needed
                     if (currentFileContent === null) {
-                        currentFileContent = '';
+                        currentFileContent = "";
                     } else {
                         // End-of-line
-                        currentFileContent = currentFileContent + '\n';
+                        currentFileContent = currentFileContent + "\n";
                     }
                     currentFileContent = currentFileContent + line;
                 }
@@ -1601,7 +1608,7 @@ module Harness {
 
             // EOF, push whatever remains
             let newTestFile2 = {
-                content: currentFileContent || '',
+                content: currentFileContent || "",
                 name: currentFileName,
                 fileOptions: currentFileOptions,
                 originalFilePath: fileName,
@@ -1623,27 +1630,27 @@ module Harness {
 
         export function localPath(fileName: string, baselineFolder?: string, subfolder?: string) {
             if (baselineFolder === undefined) {
-                return baselinePath(fileName, 'local', 'tests/baselines', subfolder);
+                return baselinePath(fileName, "local", "tests/baselines", subfolder);
             }
             else {
-                return baselinePath(fileName, 'local', baselineFolder, subfolder);
+                return baselinePath(fileName, "local", baselineFolder, subfolder);
             }
         }
 
         function referencePath(fileName: string, baselineFolder?: string, subfolder?: string) {
             if (baselineFolder === undefined) {
-                return baselinePath(fileName, 'reference', 'tests/baselines', subfolder);
+                return baselinePath(fileName, "reference", "tests/baselines", subfolder);
             }
             else {
-                return baselinePath(fileName, 'reference', baselineFolder, subfolder);
+                return baselinePath(fileName, "reference", baselineFolder, subfolder);
             }
         }
 
         function baselinePath(fileName: string, type: string, baselineFolder: string, subfolder?: string) {
             if (subfolder !== undefined) {
-                return Harness.userSpecifiedRoot + baselineFolder + '/' +  subfolder + '/' + type + '/' + fileName;
+                return Harness.userSpecifiedRoot + baselineFolder + "/" +  subfolder + "/" + type + "/" + fileName;
             } else {
-                return Harness.userSpecifiedRoot + baselineFolder + '/'  + type + '/' + fileName;
+                return Harness.userSpecifiedRoot + baselineFolder + "/"  + type + "/" + fileName;
             }
         }
 
@@ -1677,7 +1684,7 @@ module Harness {
             let actual = generateContent();
 
             if (actual === undefined) {
-                throw new Error('The generated content was "undefined". Return "null" if no baselining is required."');
+                throw new Error("The generated content was \"undefined\". Return \"null\" if no baselining is required.\"");
             }
 
             // Store the content in the 'local' folder so we
@@ -1700,10 +1707,10 @@ module Harness {
             let refFileName = referencePath(relativeFileName, opts && opts.Baselinefolder, opts && opts.Subfolder);
 
             if (actual === null) {
-                actual = '<no content>';
+                actual = "<no content>";
             }
 
-            let expected = '<no content>';
+            let expected = "<no content>";
             if (IO.fileExists(refFileName)) {
                 expected = IO.readFile(refFileName);
             }
@@ -1712,10 +1719,10 @@ module Harness {
         }
 
         function writeComparison(expected: string, actual: string, relativeFileName: string, actualFileName: string, descriptionForDescribe: string) {
-            let encoded_actual = (new Buffer(actual)).toString('utf8');
+            let encoded_actual = (new Buffer(actual)).toString("utf8");
             if (expected != encoded_actual) {
                 // Overwrite & issue error
-                let errMsg = 'The baseline file ' + relativeFileName + ' has changed';
+                let errMsg = "The baseline file " + relativeFileName + " has changed";
                 throw new Error(errMsg);
             }
         }
@@ -1744,7 +1751,7 @@ module Harness {
     }
 
     export function isLibraryFile(filePath: string): boolean {
-        return (Path.getFileName(filePath) === 'lib.d.ts') || (Path.getFileName(filePath) === 'lib.core.d.ts');
+        return (Path.getFileName(filePath) === "lib.d.ts") || (Path.getFileName(filePath) === "lib.core.d.ts");
     }
 
     export function isBuiltFile(filePath: string): boolean {

src/harness/harnessLanguageService.ts

@@ -1,7 +1,7 @@
-/// <reference path='..\services\services.ts' />
-/// <reference path='..\services\shims.ts' />
-/// <reference path='..\server\client.ts' />
-/// <reference path='harness.ts' />
+/// <reference path="..\services\services.ts" />
+/// <reference path="..\services\shims.ts" />
+/// <reference path="..\server\client.ts" />
+/// <reference path="harness.ts" />
 
 module Harness.LanguageService {
     export class ScriptInfo {
@@ -203,9 +203,35 @@ module Harness.LanguageService {
     /// Shim adapter
     class ShimLanguageServiceHost extends LanguageServiceAdapterHost implements ts.LanguageServiceShimHost, ts.CoreServicesShimHost {
         private nativeHost: NativeLanguageServiceHost;
-        constructor(cancellationToken?: ts.HostCancellationToken, options?: ts.CompilerOptions) {
+
+        public getModuleResolutionsForFile: (fileName: string)=> string;
+
+        constructor(preprocessToResolve: boolean, cancellationToken?: ts.HostCancellationToken, options?: ts.CompilerOptions) {
             super(cancellationToken, options);
             this.nativeHost = new NativeLanguageServiceHost(cancellationToken, options);
+
+            if (preprocessToResolve) {
+                let compilerOptions = this.nativeHost.getCompilationSettings()
+                let moduleResolutionHost: ts.ModuleResolutionHost = {
+                    fileExists: fileName => this.getScriptInfo(fileName) !== undefined,
+                    readFile: fileName => {
+                        let scriptInfo = this.getScriptInfo(fileName);
+                        return scriptInfo && scriptInfo.content;
+                    }
+                };
+                this.getModuleResolutionsForFile = (fileName) => {
+                    let scriptInfo = this.getScriptInfo(fileName);
+                    let preprocessInfo = ts.preProcessFile(scriptInfo.content, /*readImportFiles*/ true);
+                    let imports: ts.Map<string> = {};
+                    for (let module of preprocessInfo.importedFiles) {
+                        let resolutionInfo = ts.resolveModuleName(module.fileName, fileName, compilerOptions, moduleResolutionHost);
+                        if (resolutionInfo.resolvedFileName) {
+                            imports[module.fileName] = resolutionInfo.resolvedFileName;
+                        }
+                    }
+                    return JSON.stringify(imports);
+                }
+            }
         }
 
         getFilenames(): string[] { return this.nativeHost.getFilenames(); }
@@ -229,7 +255,11 @@ module Harness.LanguageService {
         readDirectory(rootDir: string, extension: string): string {
             throw new Error("NYI");
         }
-
+        fileExists(fileName: string) { return this.getScriptInfo(fileName) !== undefined; }        
+        readFile(fileName: string) { 
+            let snapshot = this.nativeHost.getScriptSnapshot(fileName);
+            return snapshot && snapshot.getText(0, snapshot.getLength());
+        }        
         log(s: string): void { this.nativeHost.log(s); }
         trace(s: string): void { this.nativeHost.trace(s); }
         error(s: string): void { this.nativeHost.error(s); }
@@ -242,7 +272,7 @@ module Harness.LanguageService {
             throw new Error("NYI");
         }
         getClassificationsForLine(text: string, lexState: ts.EndOfLineState, classifyKeywordsInGenerics?: boolean): ts.ClassificationResult {
-            let result = this.shim.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics).split('\n');
+            let result = this.shim.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics).split("\n");
             let entries: ts.ClassificationInfo[] = [];
             let i = 0;
             let position = 0;
@@ -381,6 +411,9 @@ module Harness.LanguageService {
         getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: ts.FormatCodeOptions): ts.TextChange[] {
             return unwrapJSONCallResult(this.shim.getFormattingEditsAfterKeystroke(fileName, position, key, JSON.stringify(options)));
         }
+        getDocCommentTemplateAtPosition(fileName: string, position: number): ts.TextInsertion {
+            return unwrapJSONCallResult(this.shim.getDocCommentTemplateAtPosition(fileName, position));
+        }
         getEmitOutput(fileName: string): ts.EmitOutput {
             return unwrapJSONCallResult(this.shim.getEmitOutput(fileName));
         }
@@ -396,8 +429,8 @@ module Harness.LanguageService {
     export class ShimLanugageServiceAdapter implements LanguageServiceAdapter {
         private host: ShimLanguageServiceHost;
         private factory: ts.TypeScriptServicesFactory;
-        constructor(cancellationToken?: ts.HostCancellationToken, options?: ts.CompilerOptions) {
-            this.host = new ShimLanguageServiceHost(cancellationToken, options);
+        constructor(preprocessToResolve: boolean, cancellationToken?: ts.HostCancellationToken, options?: ts.CompilerOptions) {
+            this.host = new ShimLanguageServiceHost(preprocessToResolve, cancellationToken, options);
             this.factory = new TypeScript.Services.TypeScriptServicesFactory();
         }
         getHost() { return this.host; }
@@ -416,6 +449,7 @@ module Harness.LanguageService {
             let convertResult: ts.PreProcessedFileInfo = {
                 referencedFiles: [],
                 importedFiles: [],
+                ambientExternalModules: [],
                 isLibFile: shimResult.isLibFile
             };
 

src/harness/loggedIO.ts

@@ -73,7 +73,7 @@ interface PlaybackControl {
 module Playback {
     let recordLog: IOLog = undefined;
     let replayLog: IOLog = undefined;
-    let recordLogFileNameBase = '';
+    let recordLogFileNameBase = "";
 
     interface Memoized<T> {
         (s: string): T;
@@ -99,7 +99,7 @@ module Playback {
         return {
             timestamp: (new Date()).toString(),
             arguments: [],
-            currentDirectory: '',
+            currentDirectory: "",
             filesRead: [],
             filesWritten: [],
             filesDeleted: [],
@@ -110,7 +110,7 @@ module Playback {
             dirExists: [],
             dirsCreated: [],
             pathsResolved: [],
-            executingPath: ''
+            executingPath: ""
         };
     }
 
@@ -170,7 +170,7 @@ module Playback {
             if (defaultValue !== undefined) {
                 return defaultValue;
             } else {
-                throw new Error('No matching result in log array for: ' + JSON.stringify(expectedFields));
+                throw new Error("No matching result in log array for: " + JSON.stringify(expectedFields));
             }
         }
         return results[0].result;
@@ -195,7 +195,7 @@ module Playback {
         }
         // If we got here, we didn't find a match
         if (defaultValue === undefined) {
-            throw new Error('No matching result in log array for path: ' + expectedPath);
+            throw new Error("No matching result in log array for path: " + expectedPath);
         } else {
             return defaultValue;
         }
@@ -203,7 +203,7 @@ module Playback {
 
     let pathEquivCache: any = {};
     function pathsAreEquivalent(left: string, right: string, wrapper: { resolvePath(s: string): string }) {
-        let key = left + '-~~-' + right;
+        let key = left + "-~~-" + right;
         function areSame(a: string, b: string) {
             return ts.normalizeSlashes(a).toLowerCase() === ts.normalizeSlashes(b).toLowerCase();
         }
@@ -233,14 +233,14 @@ module Playback {
         wrapper.endRecord = () => {
             if (recordLog !== undefined) {
                 let i = 0;
-                let fn = () => recordLogFileNameBase + i + '.json';
+                let fn = () => recordLogFileNameBase + i + ".json";
                 while (underlying.fileExists(fn())) i++;
                 underlying.writeFile(fn(), JSON.stringify(recordLog));
                 recordLog = undefined;
             }
         };
 
-        Object.defineProperty(wrapper, 'args', {
+        Object.defineProperty(wrapper, "args", {
             get() {
                 if (replayLog !== undefined) {
                     return replayLog.arguments;
@@ -276,7 +276,7 @@ module Playback {
 
         wrapper.getCurrentDirectory = () => {
             if (replayLog !== undefined) {
-                return replayLog.currentDirectory || '';
+                return replayLog.currentDirectory || "";
             } else if (recordLog !== undefined) {
                 return recordLog.currentDirectory = underlying.getCurrentDirectory();
             } else {
@@ -286,7 +286,7 @@ module Playback {
 
         wrapper.resolvePath = recordReplay(wrapper.resolvePath, underlying)(
             (path) => callAndRecord(underlying.resolvePath(path), recordLog.pathsResolved, { path: path }),
-            memoize((path) => findResultByFields(replayLog.pathsResolved, { path: path }, !ts.isRootedDiskPath(ts.normalizeSlashes(path)) && replayLog.currentDirectory ? replayLog.currentDirectory + '/' + path : ts.normalizeSlashes(path))));
+            memoize((path) => findResultByFields(replayLog.pathsResolved, { path: path }, !ts.isRootedDiskPath(ts.normalizeSlashes(path)) && replayLog.currentDirectory ? replayLog.currentDirectory + "/" + path : ts.normalizeSlashes(path))));
 
         wrapper.readFile = recordReplay(wrapper.readFile, underlying)(
             (path) => {
@@ -299,7 +299,7 @@ module Playback {
 
         wrapper.writeFile = recordReplay(wrapper.writeFile, underlying)(
             (path, contents) => callAndRecord(underlying.writeFile(path, contents), recordLog.filesWritten, { path: path, contents: contents, bom: false }),
-            (path, contents) => noOpReplay('writeFile'));
+            (path, contents) => noOpReplay("writeFile"));
 
         wrapper.exit = (exitCode) => {
             if (recordLog !== undefined) {

src/harness/projectsRunner.ts

@@ -74,7 +74,7 @@ class ProjectRunner extends RunnerBase {
         catch (e) {
             assert(false, "Testcase: " + testCaseFileName + " does not contain valid json format: " + e.message);
         }
-        let testCaseJustName = testCaseFileName.replace(/^.*[\\\/]/, '').replace(/\.json/, "");
+        let testCaseJustName = testCaseFileName.replace(/^.*[\\\/]/, "").replace(/\.json/, "");
 
         function moduleNameToString(moduleKind: ts.ModuleKind) {
             return moduleKind === ts.ModuleKind.AMD
@@ -191,7 +191,9 @@ class ProjectRunner extends RunnerBase {
                     getCurrentDirectory,
                     getCanonicalFileName: Harness.Compiler.getCanonicalFileName,
                     useCaseSensitiveFileNames: () => ts.sys.useCaseSensitiveFileNames,
-                    getNewLine: () => ts.sys.newLine
+                    getNewLine: () => ts.sys.newLine,
+                    fileExists: fileName => getSourceFile(fileName, ts.ScriptTarget.ES5) !== undefined,
+                    readFile: fileName => Harness.IO.readFile(fileName)
                 };
             }
         }
@@ -331,9 +333,9 @@ class ProjectRunner extends RunnerBase {
             return Harness.Compiler.getErrorBaseline(inputFiles, compilerResult.errors);
         }
 
-        let name = 'Compiling project for ' + testCase.scenario + ': testcase ' + testCaseFileName;
+        let name = "Compiling project for " + testCase.scenario + ": testcase " + testCaseFileName;
 
-        describe('Projects tests', () => {
+        describe("Projects tests", () => {
             describe(name, () => {
                 function verifyCompilerResults(moduleKind: ts.ModuleKind) {
                     let compilerResult: BatchCompileProjectTestCaseResult;
@@ -367,27 +369,27 @@ class ProjectRunner extends RunnerBase {
                         compilerResult = batchCompilerProjectTestCase(moduleKind);
                     });
 
-                    it('Resolution information of (' + moduleNameToString(moduleKind) + '): ' + testCaseFileName, () => {
-                        Harness.Baseline.runBaseline('Resolution information of (' + moduleNameToString(compilerResult.moduleKind) + '): ' + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + testCaseJustName + '.json', () => {
+                    it("Resolution information of (" + moduleNameToString(moduleKind) + "): " + testCaseFileName, () => {
+                        Harness.Baseline.runBaseline("Resolution information of (" + moduleNameToString(compilerResult.moduleKind) + "): " + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + testCaseJustName + ".json", () => {
                             return JSON.stringify(getCompilerResolutionInfo(), undefined, "    ");
                         });
                     });
 
 
-                    it('Errors for (' + moduleNameToString(moduleKind) + '): ' + testCaseFileName, () => {
+                    it("Errors for (" + moduleNameToString(moduleKind) + "): " + testCaseFileName, () => {
                         if (compilerResult.errors.length) {
-                            Harness.Baseline.runBaseline('Errors for (' + moduleNameToString(compilerResult.moduleKind) + '): ' + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + testCaseJustName + '.errors.txt', () => {
+                            Harness.Baseline.runBaseline("Errors for (" + moduleNameToString(compilerResult.moduleKind) + "): " + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + testCaseJustName + ".errors.txt", () => {
                                 return getErrorsBaseline(compilerResult);
                             });
                         }
                     });
 
 
-                    it('Baseline of emitted result (' + moduleNameToString(moduleKind) + '): ' + testCaseFileName, () => {
+                    it("Baseline of emitted result (" + moduleNameToString(moduleKind) + "): " + testCaseFileName, () => {
                         if (testCase.baselineCheck) {
                             ts.forEach(compilerResult.outputFiles, outputFile => {
 
-                                Harness.Baseline.runBaseline('Baseline of emitted result (' + moduleNameToString(compilerResult.moduleKind) + '): ' + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + outputFile.fileName, () => {
+                                Harness.Baseline.runBaseline("Baseline of emitted result (" + moduleNameToString(compilerResult.moduleKind) + "): " + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + outputFile.fileName, () => {
                                     try {
                                         return ts.sys.readFile(getProjectOutputFolder(outputFile.fileName, compilerResult.moduleKind));
                                     }
@@ -400,9 +402,9 @@ class ProjectRunner extends RunnerBase {
                     });
 
 
-                    it('SourceMapRecord for (' + moduleNameToString(moduleKind) + '): ' + testCaseFileName, () => {
+                    it("SourceMapRecord for (" + moduleNameToString(moduleKind) + "): " + testCaseFileName, () => {
                         if (compilerResult.sourceMapData) {
-                            Harness.Baseline.runBaseline('SourceMapRecord for (' + moduleNameToString(compilerResult.moduleKind) + '): ' + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + testCaseJustName + '.sourcemap.txt', () => {
+                            Harness.Baseline.runBaseline("SourceMapRecord for (" + moduleNameToString(compilerResult.moduleKind) + "): " + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + testCaseJustName + ".sourcemap.txt", () => {
                                 return Harness.SourceMapRecoder.getSourceMapRecord(compilerResult.sourceMapData, compilerResult.program,
                                     ts.filter(compilerResult.outputFiles, outputFile => Harness.Compiler.isJS(outputFile.emittedFileName)));
                             });
@@ -411,11 +413,11 @@ class ProjectRunner extends RunnerBase {
 
                     // Verify that all the generated .d.ts files compile
 
-                    it('Errors in generated Dts files for (' + moduleNameToString(moduleKind) + '): ' + testCaseFileName, () => {
+                    it("Errors in generated Dts files for (" + moduleNameToString(moduleKind) + "): " + testCaseFileName, () => {
                         if (!compilerResult.errors.length && testCase.declaration) {
                             let dTsCompileResult = compileCompileDTsFiles(compilerResult);
                             if (dTsCompileResult.errors.length) {
-                                Harness.Baseline.runBaseline('Errors in generated Dts files for (' + moduleNameToString(compilerResult.moduleKind) + '): ' + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + testCaseJustName + '.dts.errors.txt', () => {
+                                Harness.Baseline.runBaseline("Errors in generated Dts files for (" + moduleNameToString(compilerResult.moduleKind) + "): " + testCaseFileName, getBaselineFolder(compilerResult.moduleKind) + testCaseJustName + ".dts.errors.txt", () => {
                                     return getErrorsBaseline(dTsCompileResult);
                                 });
                             }

src/harness/runner.ts

@@ -13,12 +13,12 @@
 // limitations under the License.
 //
 
-/// <reference path='test262Runner.ts' />
-/// <reference path='compilerRunner.ts' />
-/// <reference path='fourslashRunner.ts' />
-/// <reference path='projectsRunner.ts' />
-/// <reference path='rwcRunner.ts' />
-/// <reference path='harness.ts' />
+/// <reference path="test262Runner.ts" />
+/// <reference path="compilerRunner.ts" />
+/// <reference path="fourslashRunner.ts" />
+/// <reference path="projectsRunner.ts" />
+/// <reference path="rwcRunner.ts" />
+/// <reference path="harness.ts" />
 
 let runners: RunnerBase[] = [];
 let iterations: number = 1;
@@ -32,13 +32,13 @@ function runTests(runners: RunnerBase[]) {
 }
 
 // users can define tests to run in mytest.config that will override cmd line args, otherwise use cmd line args (test.config), otherwise no options
-let mytestconfig = 'mytest.config';
-let testconfig = 'test.config';
+let mytestconfig = "mytest.config";
+let testconfig = "test.config";
 let testConfigFile =
     Harness.IO.fileExists(mytestconfig) ? Harness.IO.readFile(mytestconfig) :
-    (Harness.IO.fileExists(testconfig) ? Harness.IO.readFile(testconfig) : '');
+    (Harness.IO.fileExists(testconfig) ? Harness.IO.readFile(testconfig) : "");
 
-if (testConfigFile !== '') {
+if (testConfigFile !== "") {
     let testConfig = JSON.parse(testConfigFile);
     if (testConfig.light) {
         Harness.lightMode = true;
@@ -51,33 +51,36 @@ if (testConfigFile !== '') {
             }
 
             switch (option) {
-                case 'compiler':
+                case "compiler":
                     runners.push(new CompilerBaselineRunner(CompilerTestType.Conformance));
                     runners.push(new CompilerBaselineRunner(CompilerTestType.Regressions));
                     runners.push(new ProjectRunner());
                     break;
-                case 'conformance':
+                case "conformance":
                     runners.push(new CompilerBaselineRunner(CompilerTestType.Conformance));
                     break;
-                case 'project':
+                case "project":
                     runners.push(new ProjectRunner());
                     break;
-                case 'fourslash':
+                case "fourslash":
                     runners.push(new FourSlashRunner(FourSlashTestType.Native));
                     break;
-                case 'fourslash-shims':
+                case "fourslash-shims":
                     runners.push(new FourSlashRunner(FourSlashTestType.Shims));
                     break;
+                case 'fourslash-shims-pp':
+                    runners.push(new FourSlashRunner(FourSlashTestType.ShimsWithPreprocess));
+                    break;
                 case 'fourslash-server':
                     runners.push(new FourSlashRunner(FourSlashTestType.Server));
                     break;
-                case 'fourslash-generated':
+                case "fourslash-generated":
                     runners.push(new GeneratedFourslashRunner(FourSlashTestType.Native));
                     break;
-                case 'rwc':
+                case "rwc":
                     runners.push(new RWCRunner());
                     break;
-                case 'test262':
+                case "test262":
                     runners.push(new Test262BaselineRunner());
                     break;
             }
@@ -98,10 +101,11 @@ if (runners.length === 0) {
     // language services
     runners.push(new FourSlashRunner(FourSlashTestType.Native));
     runners.push(new FourSlashRunner(FourSlashTestType.Shims));
+    runners.push(new FourSlashRunner(FourSlashTestType.ShimsWithPreprocess));
     runners.push(new FourSlashRunner(FourSlashTestType.Server));
     // runners.push(new GeneratedFourslashRunner());
 }
 
-ts.sys.newLine = '\r\n';
+ts.sys.newLine = "\r\n";
 
 runTests(runners);

src/harness/runnerbase.ts

@@ -33,7 +33,7 @@ abstract class RunnerBase {
         
         // when running in the browser the 'full path' is the host name, shows up in error baselines
         let localHost = /http:\/localhost:\d+/g;
-        fixedPath = fixedPath.replace(localHost, '');
+        fixedPath = fixedPath.replace(localHost, "");
         return fixedPath;
     }
 }

src/harness/rwcRunner.ts

@@ -1,7 +1,7 @@
-/// <reference path='harness.ts'/>
-/// <reference path='runnerbase.ts' />
-/// <reference path='loggedIO.ts' />
-/// <reference path='..\compiler\commandLineParser.ts'/>
+/// <reference path="harness.ts"/>
+/// <reference path="runnerbase.ts" />
+/// <reference path="loggedIO.ts" />
+/// <reference path="..\compiler\commandLineParser.ts"/>
 
 module RWC {
     function runWithIOLog(ioLog: IOLog, fn: () => void) {
@@ -26,8 +26,8 @@ module RWC {
             let compilerResult: Harness.Compiler.CompilerResult;
             let compilerOptions: ts.CompilerOptions;
             let baselineOpts: Harness.Baseline.BaselineOptions = {
-                Subfolder: 'rwc',
-                Baselinefolder: 'internal/baselines'
+                Subfolder: "rwc",
+                Baselinefolder: "internal/baselines"
             };
             let baseName = /(.*)\/(.*).json/.exec(ts.normalizeSlashes(jsonPath))[2];
             let currentDirectory: string;
@@ -49,7 +49,7 @@ module RWC {
                 useCustomLibraryFile = undefined;
             });
 
-            it('can compile', () => {
+            it("can compile", () => {
                 let harnessCompiler = Harness.Compiler.getCompiler();
                 let opts: ts.ParsedCommandLine;
 
@@ -74,10 +74,11 @@ module RWC {
                     });
 
                     // Add files to compilation
+                    let isInInputList = (resolvedPath: string) => (inputFile: { unitName: string; content: string; }) => inputFile.unitName === resolvedPath;
                     for (let fileRead of ioLog.filesRead) {
                         // Check if the file is already added into the set of input files.
-                        var resolvedPath = ts.normalizeSlashes(ts.sys.resolvePath(fileRead.path));
-                        let inInputList = ts.forEach(inputFiles, inputFile => inputFile.unitName === resolvedPath);
+                        const resolvedPath = ts.normalizeSlashes(ts.sys.resolvePath(fileRead.path));
+                        let inInputList = ts.forEach(inputFiles, isInInputList(resolvedPath));
 
                         if (!Harness.isLibraryFile(fileRead.path)) {
                             if (inInputList) {
@@ -130,14 +131,14 @@ module RWC {
             });
 
 
-            it('has the expected emitted code', () => {
-                Harness.Baseline.runBaseline('has the expected emitted code', baseName + '.output.js', () => {
+            it("has the expected emitted code", () => {
+                Harness.Baseline.runBaseline("has the expected emitted code", baseName + ".output.js", () => {
                     return Harness.Compiler.collateOutputs(compilerResult.files);
                 }, false, baselineOpts);
             });
 
-            it('has the expected declaration file content', () => {
-                Harness.Baseline.runBaseline('has the expected declaration file content', baseName + '.d.ts', () => {
+            it("has the expected declaration file content", () => {
+                Harness.Baseline.runBaseline("has the expected declaration file content", baseName + ".d.ts", () => {
                     if (!compilerResult.declFilesCode.length) {
                         return null;
                     }
@@ -146,8 +147,8 @@ module RWC {
                 }, false, baselineOpts);
             });
 
-            it('has the expected source maps', () => {
-                Harness.Baseline.runBaseline('has the expected source maps', baseName + '.map', () => {
+            it("has the expected source maps", () => {
+                Harness.Baseline.runBaseline("has the expected source maps", baseName + ".map", () => {
                     if (!compilerResult.sourceMaps.length) {
                         return null;
                     }
@@ -156,16 +157,16 @@ module RWC {
                 }, false, baselineOpts);
             });
 
-            /*it('has correct source map record', () => {
+            /*it("has correct source map record", () => {
                 if (compilerOptions.sourceMap) {
-                    Harness.Baseline.runBaseline('has correct source map record', baseName + '.sourcemap.txt', () => {
+                    Harness.Baseline.runBaseline("has correct source map record", baseName + ".sourcemap.txt", () => {
                         return compilerResult.getSourceMapRecord();
                     }, false, baselineOpts);
                 }
             });*/
 
-            it('has the expected errors', () => {
-                Harness.Baseline.runBaseline('has the expected errors', baseName + '.errors.txt', () => {
+            it("has the expected errors", () => {
+                Harness.Baseline.runBaseline("has the expected errors", baseName + ".errors.txt", () => {
                     if (compilerResult.errors.length === 0) {
                         return null;
                     }
@@ -176,9 +177,9 @@ module RWC {
 
             // Ideally, a generated declaration file will have no errors. But we allow generated
             // declaration file errors as part of the baseline.
-            it('has the expected errors in generated declaration files', () => {
+            it("has the expected errors in generated declaration files", () => {
                 if (compilerOptions.declaration && !compilerResult.errors.length) {
-                    Harness.Baseline.runBaseline('has the expected errors in generated declaration files', baseName + '.dts.errors.txt', () => {
+                    Harness.Baseline.runBaseline("has the expected errors in generated declaration files", baseName + ".dts.errors.txt", () => {
                         let declFileCompilationResult = Harness.Compiler.getCompiler().compileDeclarationFiles(inputFiles, otherFiles, compilerResult,
                             /*settingscallback*/ undefined, compilerOptions, currentDirectory);
                         if (declFileCompilationResult.declResult.errors.length === 0) {

src/harness/sourceMapRecorder.ts

@@ -13,7 +13,7 @@
 // limitations under the License.
 //
 
-///<reference path='harness.ts'/>
+///<reference path="harness.ts"/>
 
 module Harness.SourceMapRecoder {
 
@@ -50,11 +50,11 @@ module Harness.SourceMapRecoder {
                 return true;
             }
 
-            if (sourceMapMappings.charAt(decodingIndex) == ',') {
+            if (sourceMapMappings.charAt(decodingIndex) == ",") {
                 return true;
             }
 
-            if (sourceMapMappings.charAt(decodingIndex) == ';') {
+            if (sourceMapMappings.charAt(decodingIndex) == ";") {
                 return true;
             }
 
@@ -117,7 +117,7 @@ module Harness.SourceMapRecoder {
             }
 
             while (decodingIndex < sourceMapMappings.length) {
-                if (sourceMapMappings.charAt(decodingIndex) == ';') {
+                if (sourceMapMappings.charAt(decodingIndex) == ";") {
                     // New line
                     decodeOfEncodedMapping.emittedLine++;
                     decodeOfEncodedMapping.emittedColumn = 1;
@@ -125,7 +125,7 @@ module Harness.SourceMapRecoder {
                     continue;
                 }
 
-                if (sourceMapMappings.charAt(decodingIndex) == ',') {
+                if (sourceMapMappings.charAt(decodingIndex) == ",") {
                     // Next entry is on same line - no action needed
                     decodingIndex++;
                     continue;
@@ -459,6 +459,6 @@ module Harness.SourceMapRecoder {
             SourceMapSpanWriter.close(); // If the last spans werent emitted, emit them
         }
         sourceMapRecoder.Close();
-        return sourceMapRecoder.lines.join('\r\n');
+        return sourceMapRecoder.lines.join("\r\n");
     }
 }

src/harness/test262Runner.ts

@@ -1,9 +1,9 @@
-/// <reference path='harness.ts' />
-/// <reference path='runnerbase.ts' />
+/// <reference path="harness.ts" />
+/// <reference path="runnerbase.ts" />
 
 class Test262BaselineRunner extends RunnerBase {
-    private static basePath = 'internal/cases/test262';
-    private static helpersFilePath = 'tests/cases/test262-harness/helpers.d.ts';
+    private static basePath = "internal/cases/test262";
+    private static helpersFilePath = "tests/cases/test262-harness/helpers.d.ts";
     private static helperFile = {
         unitName: Test262BaselineRunner.helpersFilePath,
         content: Harness.IO.readFile(Test262BaselineRunner.helpersFilePath)
@@ -15,8 +15,8 @@ class Test262BaselineRunner extends RunnerBase {
         module: ts.ModuleKind.CommonJS
     };
     private static baselineOptions: Harness.Baseline.BaselineOptions = {
-        Subfolder: 'test262',
-        Baselinefolder: 'internal/baselines'
+        Subfolder: "test262",
+        Baselinefolder: "internal/baselines"
     };
 
     private static getTestFilePath(filename: string): string {
@@ -24,7 +24,7 @@ class Test262BaselineRunner extends RunnerBase {
     }
 
     private runTest(filePath: string) {
-        describe('test262 test for ' + filePath, () => {
+        describe("test262 test for " + filePath, () => {
             // Mocha holds onto the closure environment of the describe callback even after the test is done.
             // Everything declared here should be cleared out in the "after" callback.
             let testState: {
@@ -36,7 +36,7 @@ class Test262BaselineRunner extends RunnerBase {
 
             before(() => {
                 let content = Harness.IO.readFile(filePath);
-                let testFilename = ts.removeFileExtension(filePath).replace(/\//g, '_') + ".test";
+                let testFilename = ts.removeFileExtension(filePath).replace(/\//g, "_") + ".test";
                 let testCaseContent = Harness.TestCaseParser.makeUnitsFromTest(content, testFilename);
 
                 let inputFiles = testCaseContent.testUnitData.map(unit => {
@@ -61,15 +61,15 @@ class Test262BaselineRunner extends RunnerBase {
                 testState = undefined;
             });
 
-            it('has the expected emitted code', () => {
-                Harness.Baseline.runBaseline('has the expected emitted code', testState.filename + '.output.js', () => {
+            it("has the expected emitted code", () => {
+                Harness.Baseline.runBaseline("has the expected emitted code", testState.filename + ".output.js", () => {
                     let files = testState.compilerResult.files.filter(f => f.fileName !== Test262BaselineRunner.helpersFilePath);
                     return Harness.Compiler.collateOutputs(files);
                 }, false, Test262BaselineRunner.baselineOptions);
             });
 
-            it('has the expected errors', () => {
-                Harness.Baseline.runBaseline('has the expected errors', testState.filename + '.errors.txt', () => {
+            it("has the expected errors", () => {
+                Harness.Baseline.runBaseline("has the expected errors", testState.filename + ".errors.txt", () => {
                     let errors = testState.compilerResult.errors;
                     if (errors.length === 0) {
                         return null;
@@ -79,13 +79,13 @@ class Test262BaselineRunner extends RunnerBase {
                 }, false, Test262BaselineRunner.baselineOptions);
             });
 
-            it('satisfies inletiants', () => {
+            it("satisfies inletiants", () => {
                 let sourceFile = testState.program.getSourceFile(Test262BaselineRunner.getTestFilePath(testState.filename));
                 Utils.assertInvariants(sourceFile, /*parent:*/ undefined);
             });
 
-            it('has the expected AST', () => {
-                Harness.Baseline.runBaseline('has the expected AST', testState.filename + '.AST.txt', () => {
+            it("has the expected AST", () => {
+                Harness.Baseline.runBaseline("has the expected AST", testState.filename + ".AST.txt", () => {
                     let sourceFile = testState.program.getSourceFile(Test262BaselineRunner.getTestFilePath(testState.filename));
                     return Utils.sourceFileToJSON(sourceFile);
                 }, false, Test262BaselineRunner.baselineOptions);

src/harness/typeWriter.ts

@@ -71,4 +71,4 @@ class TypeWriterWalker {
             symbol: symbolString
         });
     }
-}
+}

src/lib/core.d.ts

@@ -324,9 +324,9 @@ interface String {
     /**
       * Replaces text in a string, using a regular expression or search string.
       * @param searchValue A String object or string literal that represents the regular expression
-      * @param replaceValue A function that returns the replacement text.
+      * @param replacer A function that returns the replacement text.
       */
-    replace(searchValue: string, replaceValue: (substring: string, ...args: any[]) => string): string;
+    replace(searchValue: string, replacer: (substring: string, ...args: any[]) => string): string;
 
     /**
       * Replaces text in a string, using a regular expression or search string.
@@ -338,9 +338,9 @@ interface String {
     /**
       * Replaces text in a string, using a regular expression or search string.
       * @param searchValue A Regular Expression object containing the regular expression pattern and applicable flags
-      * @param replaceValue A function that returns the replacement text.
+      * @param replacer A function that returns the replacement text.
       */
-    replace(searchValue: RegExp, replaceValue: (substring: string, ...args: any[]) => string): string;
+    replace(searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string;
 
     /**
       * Finds the first substring match in a regular expression search.

src/lib/dom.generated.d.ts

@@ -11962,7 +11962,7 @@ interface Window extends EventTarget, WindowTimers, WindowSessionStorage, Window
     onvolumechange: (ev: Event) => any;
     onwaiting: (ev: Event) => any;
     opener: Window;
-    orientation: string;
+    orientation: string | number;
     outerHeight: number;
     outerWidth: number;
     pageXOffset: number;
@@ -12777,7 +12777,7 @@ declare var onunload: (ev: Event) => any;
 declare var onvolumechange: (ev: Event) => any;
 declare var onwaiting: (ev: Event) => any;
 declare var opener: Window;
-declare var orientation: string;
+declare var orientation: string | number;
 declare var outerHeight: number;
 declare var outerWidth: number;
 declare var pageXOffset: number;
@@ -12952,4 +12952,4 @@ declare function addEventListener(type: "unload", listener: (ev: Event) => any,
 declare function addEventListener(type: "volumechange", listener: (ev: Event) => any, useCapture?: boolean): void;
 declare function addEventListener(type: "waiting", listener: (ev: Event) => any, useCapture?: boolean): void;
 declare function addEventListener(type: "wheel", listener: (ev: WheelEvent) => any, useCapture?: boolean): void;
-declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;

src/lib/es6.d.ts

@@ -87,8 +87,8 @@ interface SymbolConstructor {
     split: symbol;
 
     /** 
-      * A method that converts an object to a corresponding primitive value.Called by the ToPrimitive
-      * abstract operation.
+      * A method that converts an object to a corresponding primitive value.
+      * Called by the ToPrimitive abstract operation.
       */
     toPrimitive: symbol;
 
@@ -98,8 +98,8 @@ interface SymbolConstructor {
       */
     toStringTag: symbol;
 
-    /** 
-      * An Object whose own property names are property names that are excluded from the with 
+    /**
+      * An Object whose own property names are property names that are excluded from the 'with'
       * environment bindings of the associated objects.
       */
     unscopables: symbol;
@@ -170,16 +170,19 @@ interface ObjectConstructor {
 }
 
 interface Function {
-    /** 
-      * Returns a new function object that is identical to the argument object in all ways except 
-      * for its identity and the value of its HomeObject internal slot. 
-      */
-    toMethod(newHome: Object): Function;
-
     /**
       * Returns the name of the function. Function names are read-only and can not be changed.
       */
     name: string;
+
+    /**
+     * Determines whether the given value inherits from this function if this function was used
+     * as a constructor function.
+     *
+     * A constructor function can control which objects are recognized as its instances by
+     * 'instanceof' by overriding this method.
+     */
+    [Symbol.hasInstance](value: any): boolean;
 }
 
 interface NumberConstructor {
@@ -257,6 +260,20 @@ interface Array<T> {
     /** Iterator */
     [Symbol.iterator](): IterableIterator<T>;
 
+    /**
+     * Returns an object whose properties have the value 'true'
+     * when they will be absent when used in a 'with' statement.
+     */
+    [Symbol.unscopables](): {
+        copyWithin: boolean;
+        entries: boolean;
+        fill: boolean;
+        find: boolean;
+        findIndex: boolean;
+        keys: boolean;
+        values: boolean;
+    };
+
     /** 
       * Returns an array of key, value pairs for every entry in the array
       */
@@ -619,37 +636,76 @@ interface Math {
     [Symbol.toStringTag]: string;
 }
 
+interface Date {
+    /**
+     * Converts a Date object to a string.
+     */
+    [Symbol.toPrimitive](hint: "default"): string;
+    /**
+     * Converts a Date object to a string.
+     */
+    [Symbol.toPrimitive](hint: "string"): string;
+    /**
+     * Converts a Date object to a number.
+     */
+    [Symbol.toPrimitive](hint: "number"): number;
+    /**
+     * Converts a Date object to a string or number.
+     *
+     * @param hint The strings "number", "string", or "default" to specify what primitive to return.
+     *
+     * @throws {TypeError} If 'hint' was given something other than "number", "string", or "default".
+     * @returns A number if 'hint' was "number", a string if 'hint' was "string" or "default".
+     */
+    [Symbol.toPrimitive](hint: string): string | number;
+}
+
 interface RegExp {
-    /** 
-      * Matches a string with a regular expression, and returns an array containing the results of 
+    /**
+      * Matches a string with this regular expression, and returns an array containing the results of
       * that search.
       * @param string A string to search within.
       */
-    match(string: string): string[];
+    [Symbol.match](string: string): RegExpMatchArray;
 
     /**
-      * Replaces text in a string, using a regular expression.
-      * @param searchValue A String object or string literal that represents the regular expression
+      * Replaces text in a string, using this regular expression.
+      * @param string A String object or string literal whose contents matching against
+      *               this regular expression will be replaced
       * @param replaceValue A String object or string literal containing the text to replace for every 
-      * successful match of rgExp in stringObj.
+      *                     successful match of this regular expression.
       */
-    replace(string: string, replaceValue: string): string;
-
-    search(string: string): number;
+    [Symbol.replace](string: string, replaceValue: string): string;
 
     /**
-      * Returns an Array object into which substrings of the result of converting string to a String 
-      * have been stored. The substrings are determined by searching from left to right for matches 
-      * of the this value regular expression; these occurrences are not part of any substring in the 
-      * returned array, but serve to divide up the String value.
-      *
-      * If the regular expression that contains capturing parentheses, then each time separator is 
-      * matched the results (including any undefined results) of the capturing parentheses are spliced.
-      * @param string string value to split
-      * @param limit if not undefined, the output array is truncated so that it contains no more 
-      * than limit elements.
+      * Replaces text in a string, using this regular expression.
+      * @param string A String object or string literal whose contents matching against
+      *               this regular expression will be replaced
+      * @param replacer A function that returns the replacement text.
       */
-    split(string: string, limit?: number): string[];
+    [Symbol.replace](string: string, replacer: (substring: string, ...args: any[]) => string): string;
+
+    /**
+      * Finds the position beginning first substring match in a regular expression search
+      * using this regular expression.
+      *
+      * @param string The string to search within.
+      */
+    [Symbol.search](string: string): number;
+
+    /**
+      * Returns an array of substrings that were delimited by strings in the original input that
+      * match against this regular expression.
+      *
+      * If the regular expression contains capturing parentheses, then each time this
+      * regular expression matches, the results (including any undefined results) of the
+      * capturing parentheses are spliced.
+      *
+      * @param string string value to split
+      * @param limit if not undefined, the output array is truncated so that it contains no more
+      * than 'limit' elements.
+      */
+    [Symbol.split](string: string, limit?: number): string[];
 
     /**
       * Returns a string indicating the flags of the regular expression in question. This field is read-only.
@@ -678,6 +734,10 @@ interface RegExp {
     unicode: boolean;
 }
 
+interface RegExpConstructor {
+    [Symbol.species](): RegExpConstructor;
+}
+
 interface Map<K, V> {
     clear(): void;
     delete(key: K): boolean;

src/lib/webworker.generated.d.ts

@@ -806,7 +806,7 @@ interface EventListenerObject {
 declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
 
 interface ErrorEventHandler {
-    (event: Event | string, source?: string, fileno?: number, columnNumber?: number): void;
+    (message: string, filename?: string, lineno?: number, colno?: number, error?:Error): void;
 }
 interface PositionCallback {
     (position: Position): void;

src/server/client.ts

@@ -183,7 +183,7 @@ namespace ts.server {
 
             return {
                 configFileName: response.body.configFileName,
-                fileNameList: response.body.fileNameList
+                fileNames: response.body.fileNames
             };
         }
         
@@ -527,8 +527,33 @@ namespace ts.server {
             });
         }
 
-        getDocumentHighlights(fileName: string, position: number): DocumentHighlights[] {
-            throw new Error("Not Implemented Yet.");
+        getDocumentHighlights(fileName: string, position: number, filesToSearch: string[]): DocumentHighlights[] {
+            let { line, offset } = this.positionToOneBasedLineOffset(fileName, position);
+            let args: protocol.DocumentHighlightsRequestArgs = { file: fileName, line, offset, filesToSearch };
+
+            let request = this.processRequest<protocol.DocumentHighlightsRequest>(CommandNames.DocumentHighlights, args);
+            let response = this.processResponse<protocol.DocumentHighlightsResponse>(request);
+
+            let self = this;
+            return response.body.map(convertToDocumentHighlights);
+
+            function convertToDocumentHighlights(item: ts.server.protocol.DocumentHighlightsItem): ts.DocumentHighlights {
+                let { file, highlightSpans } = item;
+
+                return {
+                    fileName: file,
+                    highlightSpans: highlightSpans.map(convertHighlightSpan)
+                };
+
+                function convertHighlightSpan(span: ts.server.protocol.HighlightSpan): ts.HighlightSpan {
+                    let start = self.lineOffsetToPosition(file, span.start);
+                    let end = self.lineOffsetToPosition(file, span.end);
+                    return {
+                        textSpan: ts.createTextSpanFromBounds(start, end),
+                        kind: span.kind
+                    };
+                }
+            }
         }
 
         getOutliningSpans(fileName: string): OutliningSpan[] {
@@ -538,6 +563,10 @@ namespace ts.server {
         getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[] {
             throw new Error("Not Implemented Yet."); 
         }
+        
+        getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion {
+            throw new Error("Not Implemented Yet."); 
+        }
 
         getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[] {
             var lineOffset = this.positionToOneBasedLineOffset(fileName, position);

src/server/editorServices.ts

@@ -78,15 +78,76 @@ namespace ts.server {
             return this.snap().getChangeRange(oldSnapshot);
         }
     }
-
+    
+    interface TimestampedResolvedModule extends ResolvedModule {
+        lastCheckTime: number; 
+    }
+    
     export class LSHost implements ts.LanguageServiceHost {
         ls: ts.LanguageService = null;
         compilationSettings: ts.CompilerOptions;
         filenameToScript: ts.Map<ScriptInfo> = {};
         roots: ScriptInfo[] = [];
-
+        private resolvedModuleNames: ts.FileMap<Map<TimestampedResolvedModule>>;        
+        private moduleResolutionHost: ts.ModuleResolutionHost;
+        
         constructor(public host: ServerHost, public project: Project) {
+            this.resolvedModuleNames = ts.createFileMap<Map<TimestampedResolvedModule>>(ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames))
+            this.moduleResolutionHost = {
+                fileExists: fileName => this.fileExists(fileName),
+                readFile: fileName => this.host.readFile(fileName)
+            }
         }
+        
+        resolveModuleNames(moduleNames: string[], containingFile: string): string[] {
+            let currentResolutionsInFile = this.resolvedModuleNames.get(containingFile);
+            
+            let newResolutions: Map<TimestampedResolvedModule> = {};
+            let resolvedFileNames: string[] = [];
+            
+            let compilerOptions = this.getCompilationSettings();
+                        
+            for (let moduleName of moduleNames) {
+                // check if this is a duplicate entry in the list
+                let resolution = lookUp(newResolutions, moduleName);
+                if (!resolution) {
+                    let existingResolution = currentResolutionsInFile && ts.lookUp(currentResolutionsInFile, moduleName);
+                    if (moduleResolutionIsValid(existingResolution)) {
+                        // ok, it is safe to use existing module resolution results  
+                        resolution = existingResolution;
+                    }
+                    else {
+                        resolution = <TimestampedResolvedModule>resolveModuleName(moduleName, containingFile, compilerOptions, this.moduleResolutionHost);
+                        resolution.lastCheckTime = Date.now();
+                        newResolutions[moduleName] = resolution;                                                
+                    }
+                }
+                
+                ts.Debug.assert(resolution !== undefined);
+                
+                resolvedFileNames.push(resolution.resolvedFileName);                
+            }
+            
+            // replace old results with a new one
+            this.resolvedModuleNames.set(containingFile, newResolutions);
+            return resolvedFileNames;
+            
+            function moduleResolutionIsValid(resolution: TimestampedResolvedModule): boolean {
+                if (!resolution) {
+                    return false;
+                }
+                
+                if (resolution.resolvedFileName) {
+                    // TODO: consider checking failedLookupLocations  
+                    // TODO: use lastCheckTime to track expiration for module name resolution 
+                    return true;
+                }
+                
+                // consider situation if we have no candidate locations as valid resolution.
+                // after all there is no point to invalidate it if we have no idea where to look for the module.
+                return resolution.failedLookupLocations.length === 0;
+            }
+        }        
 
         getDefaultLibFileName() {
             var nodeModuleBinDir = ts.getDirectoryPath(ts.normalizePath(this.host.getExecutingFilePath()));
@@ -102,6 +163,8 @@ namespace ts.server {
 
         setCompilationSettings(opt: ts.CompilerOptions) {
             this.compilationSettings = opt;
+            // conservatively assume that changing compiler options might affect module resolution strategy
+            this.resolvedModuleNames.clear();
         }
 
         lineAffectsRefs(filename: string, line: number) {
@@ -137,6 +200,7 @@ namespace ts.server {
         removeReferencedFile(info: ScriptInfo) {
             if (!info.isOpen) {
                 this.filenameToScript[info.fileName] = undefined;
+                this.resolvedModuleNames.remove(info.fileName);
             }
         }
 
@@ -313,7 +377,7 @@ namespace ts.server {
             return this.projectService.openFile(filename, false);
         }
 
-        getFileNameList() {
+        getFileNames() {
             let sourceFiles = this.program.getSourceFiles();
             return sourceFiles.map(sourceFile => sourceFile.fileName);
         }
@@ -555,7 +619,7 @@ namespace ts.server {
                 project.projectFileWatcher.close();
                 this.configuredProjects = copyListRemovingItem(project, this.configuredProjects);
 
-                let fileNames = project.getFileNameList();
+                let fileNames = project.getFileNames();
                 for (let fileName of fileNames) {
                     this.getScriptInfo(fileName).defaultProject = undefined;
                 }
@@ -853,9 +917,6 @@ namespace ts.server {
             } else {
                 this.log("no config file");
             }
-            if (configFileName) {
-                configFileName = getAbsolutePath(configFileName, searchPath);
-            }
             if (configFileName) {
                 let project = this.findConfiguredProjectByConfigFile(configFileName);
                 if (!project) {
@@ -966,7 +1027,8 @@ namespace ts.server {
             configFilename = ts.normalizePath(configFilename);
             // file references will be relative to dirPath (or absolute)
             var dirPath = ts.getDirectoryPath(configFilename);
-            var rawConfig: { config?: ProjectOptions; error?: Diagnostic; } = ts.readConfigFile(configFilename);
+            var contents = this.host.readFile(configFilename)
+            var rawConfig: { config?: ProjectOptions; error?: Diagnostic; } = ts.parseConfigFileText(configFilename, contents);
             if (rawConfig.error) {
                 return { succeeded: false, error: rawConfig.error };
             }
@@ -1106,6 +1168,7 @@ namespace ts.server {
             InsertSpaceAfterKeywordsInControlFlowStatements: true,
             InsertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
             InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
+            InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
             PlaceOpenBraceOnNewLineForFunctions: false,
             PlaceOpenBraceOnNewLineForControlBlocks: false,
         }

src/server/node.d.ts

@@ -123,9 +123,14 @@ declare module NodeJS {
 
     export interface ReadWriteStream extends ReadableStream, WritableStream { }
 
+    interface WindowSize {
+        columns: number;
+        rows: number;
+    }
+
     export interface Process extends EventEmitter {
-        stdout: WritableStream;
-        stderr: WritableStream;
+        stdout: WritableStream & WindowSize;
+        stderr: WritableStream & WindowSize;
         stdin: ReadableStream;
         argv: string[];
         execPath: string;

src/server/protocol.d.ts

@@ -116,7 +116,7 @@ declare namespace ts.server.protocol {
         /**
           * The list of normalized file name in the project, including 'lib.d.ts'
           */
-        fileNameList?: string[];
+        fileNames?: string[];
     }
 
     /** 
@@ -156,6 +156,17 @@ declare namespace ts.server.protocol {
         arguments: FileLocationRequestArgs;
     }
 
+    /**
+      * Arguments in document highlight request; include: filesToSearch, file,
+      * line, offset.
+      */
+    export interface DocumentHighlightsRequestArgs extends FileLocationRequestArgs {
+        /**
+         * List of files to search for document highlights.
+         */
+        filesToSearch: string[];
+    }
+
     /**
       * Go to definition request; value of command field is
       * "definition". Return response giving the file locations that
@@ -238,6 +249,35 @@ declare namespace ts.server.protocol {
         body?: OccurrencesResponseItem[];
     }
 
+    /**
+      * Get document highlights request; value of command field is
+      * "documentHighlights". Return response giving spans that are relevant
+      * in the file at a given line and column.
+      */
+    export interface DocumentHighlightsRequest extends FileLocationRequest {
+        arguments: DocumentHighlightsRequestArgs
+    }
+
+    export interface HighlightSpan extends TextSpan {
+        kind: string
+    }
+
+    export interface DocumentHighlightsItem {
+        /**
+          * File containing highlight spans.
+          */
+        file: string,
+
+        /**
+          * Spans to highlight in file.
+          */
+        highlightSpans: HighlightSpan[];
+    }
+
+    export interface DocumentHighlightsResponse extends Response {
+        body?: DocumentHighlightsItem[];
+    }
+
     /**
       * Find references request; value of command field is
       * "references". Return response giving the file locations that
@@ -412,6 +452,9 @@ declare namespace ts.server.protocol {
         
         /** Defines space handling after opening and before closing non empty parenthesis. Default value is false. */
         insertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis?: boolean;
+
+        /** Defines space handling after opening and before closing non empty brackets. Default value is false. */
+        insertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets?: boolean;
         
         /** Defines whether an open brace is put onto a new line for functions or not. Default value is false. */
         placeOpenBraceOnNewLineForFunctions?: boolean;
@@ -854,6 +897,31 @@ declare namespace ts.server.protocol {
     export interface SignatureHelpResponse extends Response {
         body?: SignatureHelpItems;
     }
+
+    /**
+    * Arguments for GeterrForProject request.
+    */
+    export interface GeterrForProjectRequestArgs {
+        /**
+          * the file requesting project error list
+          */
+        file: string;
+
+        /**
+          * Delay in milliseconds to wait before starting to compute
+          * errors for the files in the file list
+          */
+        delay: number;
+    }
+
+    /**
+      * GeterrForProjectRequest request; value of command field is 
+      * "geterrForProject". It works similarly with 'Geterr', only 
+      * it request for every file in this project.
+      */
+    export interface GeterrForProjectRequest extends Request {
+        arguments: GeterrForProjectRequestArgs
+    }
     
     /**
       * Arguments for geterr messages.

src/server/session.ts

@@ -86,9 +86,11 @@ namespace ts.server {
         export const Format = "format";
         export const Formatonkey = "formatonkey";
         export const Geterr = "geterr";
+        export const GeterrForProject = "geterrForProject";
         export const NavBar = "navbar";
         export const Navto = "navto";
         export const Occurrences = "occurrences";
+        export const DocumentHighlights = "documentHighlights";
         export const Open = "open";
         export const Quickinfo = "quickinfo";
         export const References = "references";
@@ -234,7 +236,7 @@ namespace ts.server {
         }
 
         private updateErrorCheck(checkList: PendingErrorCheck[], seq: number,
-            matchSeq: (seq: number) => boolean, ms = 1500, followMs = 200) {
+            matchSeq: (seq: number) => boolean, ms = 1500, followMs = 200, requireOpen = true) {
             if (followMs > ms) {
                 followMs = ms;
             }
@@ -249,7 +251,7 @@ namespace ts.server {
             var checkOne = () => {
                 if (matchSeq(seq)) {
                     var checkSpec = checkList[index++];
-                    if (checkSpec.project.getSourceFileFromName(checkSpec.fileName, true)) {
+                    if (checkSpec.project.getSourceFileFromName(checkSpec.fileName, requireOpen)) {
                         this.syntacticCheck(checkSpec.fileName, checkSpec.project);
                         this.immediateId = setImmediate(() => {
                             this.semanticCheck(checkSpec.fileName, checkSpec.project);
@@ -313,7 +315,7 @@ namespace ts.server {
             }));
         }
 
-        private getOccurrences(line: number, offset: number, fileName: string): protocol.OccurrencesResponseItem[]{
+        private getOccurrences(line: number, offset: number, fileName: string): protocol.OccurrencesResponseItem[] {
             fileName = ts.normalizePath(fileName);
             let project = this.projectService.getProjectForFile(fileName);
 
@@ -343,6 +345,42 @@ namespace ts.server {
             });
         }
 
+        private getDocumentHighlights(line: number, offset: number, fileName: string, filesToSearch: string[]): protocol.DocumentHighlightsItem[] {
+            fileName = ts.normalizePath(fileName);
+            let project = this.projectService.getProjectForFile(fileName);
+
+            if (!project) {
+                throw Errors.NoProject;
+            }
+
+            let { compilerService } = project;
+            let position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
+            
+            let documentHighlights = compilerService.languageService.getDocumentHighlights(fileName, position, filesToSearch);
+            
+            if (!documentHighlights) {
+                return undefined;
+            }
+
+            return documentHighlights.map(convertToDocumentHighlightsItem);
+
+            function convertToDocumentHighlightsItem(documentHighlights: ts.DocumentHighlights): ts.server.protocol.DocumentHighlightsItem {
+                let { fileName, highlightSpans } = documentHighlights;
+
+                return {
+                    file: fileName,
+                    highlightSpans: highlightSpans.map(convertHighlightSpan)
+                };
+
+                function convertHighlightSpan(highlightSpan: ts.HighlightSpan): ts.server.protocol.HighlightSpan {
+                    let { textSpan, kind } = highlightSpan;
+                    let start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
+                    let end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
+                    return { start, end, kind };
+                }
+            }
+        }
+
         private getProjectInfo(fileName: string, needFileNameList: boolean): protocol.ProjectInfo {
             fileName = ts.normalizePath(fileName)
             let project = this.projectService.getProjectForFile(fileName)
@@ -352,7 +390,7 @@ namespace ts.server {
             }
 
             if (needFileNameList) {
-                projectInfo.fileNameList = project.getFileNameList();
+                projectInfo.fileNames = project.getFileNames();
             }
 
             return projectInfo;
@@ -836,7 +874,53 @@ namespace ts.server {
             }));
         }
 
-        public exit() {
+        getDiagnosticsForProject(delay: number, fileName: string) {
+            let { configFileName, fileNames: fileNamesInProject } = this.getProjectInfo(fileName, true);
+            // No need to analyze lib.d.ts
+            fileNamesInProject = fileNamesInProject.filter((value, index, array) => value.indexOf("lib.d.ts") < 0);
+
+            // Sort the file name list to make the recently touched files come first
+            let highPriorityFiles: string[] = [];
+            let mediumPriorityFiles: string[] = [];
+            let lowPriorityFiles: string[] = [];
+            let veryLowPriorityFiles: string[] = [];
+            let normalizedFileName = ts.normalizePath(fileName);
+            let project = this.projectService.getProjectForFile(normalizedFileName);
+            for (let fileNameInProject of fileNamesInProject) {
+                if (this.getCanonicalFileName(fileNameInProject) == this.getCanonicalFileName(fileName))
+                    highPriorityFiles.push(fileNameInProject);
+                else {
+                    let info = this.projectService.getScriptInfo(fileNameInProject);
+                    if (!info.isOpen) {
+                        if (fileNameInProject.indexOf(".d.ts") > 0)
+                            veryLowPriorityFiles.push(fileNameInProject);
+                        else
+                            lowPriorityFiles.push(fileNameInProject);
+                    }
+                    else
+                        mediumPriorityFiles.push(fileNameInProject);
+                }
+            }
+
+            fileNamesInProject = highPriorityFiles.concat(mediumPriorityFiles).concat(lowPriorityFiles).concat(veryLowPriorityFiles);
+
+            if (fileNamesInProject.length > 0) {
+                let checkList = fileNamesInProject.map<PendingErrorCheck>((fileName: string) => {
+                    let normalizedFileName = ts.normalizePath(fileName);
+                    return { fileName: normalizedFileName, project };
+                });
+                // Project level error analysis runs on background files too, therefore
+                // doesn't require the file to be opened
+                this.updateErrorCheck(checkList, this.changeSeq, (n) => n == this.changeSeq, delay, 200, /*requireOpen*/ false);
+            }
+        }
+
+        getCanonicalFileName(fileName: string) {
+            let name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+            return ts.normalizePath(name);
+        }
+
+        exit() {
         }
 
         private handlers : Map<(request: protocol.Request) => {response?: any, responseRequired?: boolean}> = {
@@ -894,6 +978,10 @@ namespace ts.server {
                 var geterrArgs = <protocol.GeterrRequestArgs>request.arguments;
                 return {response: this.getDiagnostics(geterrArgs.delay, geterrArgs.files), responseRequired: false};
             },
+            [CommandNames.GeterrForProject]: (request: protocol.Request) => {
+                let { file, delay } = <protocol.GeterrForProjectRequestArgs>request.arguments;
+                return {response: this.getDiagnosticsForProject(delay, file), responseRequired: false};
+            },
             [CommandNames.Change]: (request: protocol.Request) => {
                 var changeArgs = <protocol.ChangeRequestArgs>request.arguments;
                 this.change(changeArgs.line, changeArgs.offset, changeArgs.endLine, changeArgs.endOffset,
@@ -937,6 +1025,10 @@ namespace ts.server {
                 var { line, offset, file: fileName } = <protocol.FileLocationRequestArgs>request.arguments;
                 return {response: this.getOccurrences(line, offset, fileName), responseRequired: true};
             },
+            [CommandNames.DocumentHighlights]: (request: protocol.Request) => {
+                var { line, offset, file: fileName, filesToSearch } = <protocol.DocumentHighlightsRequestArgs>request.arguments;
+                return {response: this.getDocumentHighlights(line, offset, fileName, filesToSearch), responseRequired: true};
+            },
             [CommandNames.ProjectInfo]: (request: protocol.Request) => {
                 var { file, needFileNameList } = <protocol.ProjectInfoRequestArgs>request.arguments;
                 return {response: this.getProjectInfo(file, needFileNameList), responseRequired: true};

src/services/formatting/rules.ts

@@ -39,12 +39,12 @@ namespace ts.formatting {
         public SpaceBetweenCloseBraceAndWhile: Rule;
         public NoSpaceAfterCloseBrace: Rule;
 
-        // No space for indexer and dot
+        // No space for dot
         public NoSpaceBeforeDot: Rule;
         public NoSpaceAfterDot: Rule;
+
+        // No space before and after indexer
         public NoSpaceBeforeOpenBracket: Rule;
-        public NoSpaceAfterOpenBracket: Rule;
-        public NoSpaceBeforeCloseBracket: Rule;
         public NoSpaceAfterCloseBracket: Rule;
 
         // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
@@ -135,6 +135,7 @@ namespace ts.formatting {
         public NoSpaceAfterOpenAngularBracket: Rule;
         public NoSpaceBeforeCloseAngularBracket: Rule;
         public NoSpaceAfterCloseAngularBracket: Rule;
+        public NoSpaceAfterTypeAssertion: Rule;
 
         // Remove spaces in empty interface literals. e.g.: x: {}
         public NoSpaceBetweenEmptyInterfaceBraceBrackets: Rule;
@@ -190,6 +191,13 @@ namespace ts.formatting {
         public NoSpaceAfterOpenParen: Rule;
         public NoSpaceBeforeCloseParen: Rule;
 
+        // Insert space after opening and before closing nonempty brackets
+        public SpaceAfterOpenBracket: Rule;
+        public SpaceBeforeCloseBracket: Rule;
+        public NoSpaceBetweenBrackets: Rule;
+        public NoSpaceAfterOpenBracket: Rule;
+        public NoSpaceBeforeCloseBracket: Rule;
+
         // Insert space after function keyword for anonymous functions
         public SpaceAfterAnonymousFunctionKeyword: Rule;
         public NoSpaceAfterAnonymousFunctionKeyword: Rule;
@@ -231,13 +239,13 @@ namespace ts.formatting {
             this.SpaceBetweenCloseBraceAndWhile = new Rule(RuleDescriptor.create1(SyntaxKind.CloseBraceToken, SyntaxKind.WhileKeyword), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Space));
             this.NoSpaceAfterCloseBrace = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBraceToken, Shared.TokenRange.FromTokens([SyntaxKind.CloseParenToken, SyntaxKind.CloseBracketToken, SyntaxKind.CommaToken, SyntaxKind.SemicolonToken])), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
 
-            // No space for indexer and dot
+            // No space for dot
             this.NoSpaceBeforeDot = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.DotToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
             this.NoSpaceAfterDot = new Rule(RuleDescriptor.create3(SyntaxKind.DotToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
+
+            // No space before and after indexer
             this.NoSpaceBeforeOpenBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.OpenBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
-            this.NoSpaceAfterOpenBracket = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
-            this.NoSpaceBeforeCloseBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
-            this.NoSpaceAfterCloseBracket = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), RuleAction.Delete));
+            this.NoSpaceAfterCloseBracket = new Rule(RuleDescriptor.create3(SyntaxKind.CloseBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext ), RuleAction.Delete));
 
             // Place a space before open brace in a function declaration
             this.FunctionOpenBraceLeftTokenRange = Shared.TokenRange.AnyIncludingMultilineComments;
@@ -331,12 +339,13 @@ namespace ts.formatting {
             this.NoSpaceAfterEllipsis = new Rule(RuleDescriptor.create1(SyntaxKind.DotDotDotToken, SyntaxKind.Identifier), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
             this.NoSpaceAfterOptionalParameters = new Rule(RuleDescriptor.create3(SyntaxKind.QuestionToken, Shared.TokenRange.FromTokens([SyntaxKind.CloseParenToken, SyntaxKind.CommaToken])), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsNotBinaryOpContext), RuleAction.Delete));
 
-            // generics
-            this.NoSpaceBeforeOpenAngularBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.TypeNames, SyntaxKind.LessThanToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterContext), RuleAction.Delete));
-            this.NoSpaceBetweenCloseParenAndAngularBracket = new Rule(RuleDescriptor.create1(SyntaxKind.CloseParenToken, SyntaxKind.LessThanToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterContext), RuleAction.Delete));
-            this.NoSpaceAfterOpenAngularBracket = new Rule(RuleDescriptor.create3(SyntaxKind.LessThanToken, Shared.TokenRange.TypeNames), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterContext), RuleAction.Delete));
-            this.NoSpaceBeforeCloseAngularBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.GreaterThanToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterContext), RuleAction.Delete));
-            this.NoSpaceAfterCloseAngularBracket = new Rule(RuleDescriptor.create3(SyntaxKind.GreaterThanToken, Shared.TokenRange.FromTokens([SyntaxKind.OpenParenToken, SyntaxKind.OpenBracketToken, SyntaxKind.GreaterThanToken, SyntaxKind.CommaToken])), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterContext), RuleAction.Delete));
+            // generics and type assertions
+            this.NoSpaceBeforeOpenAngularBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.TypeNames, SyntaxKind.LessThanToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), RuleAction.Delete));
+            this.NoSpaceBetweenCloseParenAndAngularBracket = new Rule(RuleDescriptor.create1(SyntaxKind.CloseParenToken, SyntaxKind.LessThanToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), RuleAction.Delete));
+            this.NoSpaceAfterOpenAngularBracket = new Rule(RuleDescriptor.create3(SyntaxKind.LessThanToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), RuleAction.Delete));
+            this.NoSpaceBeforeCloseAngularBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.GreaterThanToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), RuleAction.Delete));
+            this.NoSpaceAfterCloseAngularBracket = new Rule(RuleDescriptor.create3(SyntaxKind.GreaterThanToken, Shared.TokenRange.FromTokens([SyntaxKind.OpenParenToken, SyntaxKind.OpenBracketToken, SyntaxKind.GreaterThanToken, SyntaxKind.CommaToken])), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), RuleAction.Delete));
+            this.NoSpaceAfterTypeAssertion = new Rule(RuleDescriptor.create3(SyntaxKind.GreaterThanToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsTypeAssertionContext), RuleAction.Delete));
 
             // Remove spaces in empty interface literals. e.g.: x: {}
             this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new Rule(RuleDescriptor.create1(SyntaxKind.OpenBraceToken, SyntaxKind.CloseBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext, Rules.IsObjectTypeContext), RuleAction.Delete));
@@ -391,6 +400,7 @@ namespace ts.formatting {
                 this.NoSpaceAfterOpenAngularBracket,
                 this.NoSpaceBeforeCloseAngularBracket,
                 this.NoSpaceAfterCloseAngularBracket,
+                this.NoSpaceAfterTypeAssertion,
                 this.SpaceBeforeAt,
                 this.NoSpaceAfterAt,
                 this.SpaceAfterDecorator,
@@ -402,8 +412,8 @@ namespace ts.formatting {
                 this.NoSpaceBeforeSemicolon,
                 this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
                 this.NoSpaceBeforeComma,
-                this.NoSpaceBeforeOpenBracket, this.NoSpaceAfterOpenBracket,
-                this.NoSpaceBeforeCloseBracket, this.NoSpaceAfterCloseBracket,
+                this.NoSpaceBeforeOpenBracket,
+                this.NoSpaceAfterCloseBracket,
                 this.SpaceAfterSemicolon,
                 this.NoSpaceBeforeOpenParenInFuncDecl,
                 this.SpaceBetweenStatements, this.SpaceAfterTryFinally
@@ -448,6 +458,13 @@ namespace ts.formatting {
             this.NoSpaceAfterOpenParen = new Rule(RuleDescriptor.create3(SyntaxKind.OpenParenToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
             this.NoSpaceBeforeCloseParen = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
 
+            // Insert space after opening and before closing nonempty brackets
+            this.SpaceAfterOpenBracket = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Space));
+            this.SpaceBeforeCloseBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Space));
+            this.NoSpaceBetweenBrackets = new Rule(RuleDescriptor.create1(SyntaxKind.OpenBracketToken, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceAfterOpenBracket = new Rule(RuleDescriptor.create3(SyntaxKind.OpenBracketToken, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
+            this.NoSpaceBeforeCloseBracket = new Rule(RuleDescriptor.create2(Shared.TokenRange.Any, SyntaxKind.CloseBracketToken), RuleOperation.create2(new RuleOperationContext(Rules.IsSameLineTokenContext), RuleAction.Delete));
+
             // Insert space after function keyword for anonymous functions
             this.SpaceAfterAnonymousFunctionKeyword = new Rule(RuleDescriptor.create1(SyntaxKind.FunctionKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsFunctionDeclContext), RuleAction.Space));
             this.NoSpaceAfterAnonymousFunctionKeyword = new Rule(RuleDescriptor.create1(SyntaxKind.FunctionKeyword, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsFunctionDeclContext), RuleAction.Delete));
@@ -704,13 +721,15 @@ namespace ts.formatting {
             return context.contextNode.kind === SyntaxKind.TypeLiteral;// && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
         }
 
-        static IsTypeArgumentOrParameter(token: TextRangeWithKind, parent: Node): boolean {
+        static IsTypeArgumentOrParameterOrAssertion(token: TextRangeWithKind, parent: Node): boolean {
             if (token.kind !== SyntaxKind.LessThanToken && token.kind !== SyntaxKind.GreaterThanToken) {
                 return false;
             }
             switch (parent.kind) {
                 case SyntaxKind.TypeReference:
+                case SyntaxKind.TypeAssertionExpression:
                 case SyntaxKind.ClassDeclaration:
+                case SyntaxKind.ClassExpression:
                 case SyntaxKind.InterfaceDeclaration:
                 case SyntaxKind.FunctionDeclaration:
                 case SyntaxKind.FunctionExpression:
@@ -721,6 +740,7 @@ namespace ts.formatting {
                 case SyntaxKind.ConstructSignature:
                 case SyntaxKind.CallExpression:
                 case SyntaxKind.NewExpression:
+                case SyntaxKind.ExpressionWithTypeArguments:
                     return true;
                 default:
                     return false;
@@ -728,9 +748,13 @@ namespace ts.formatting {
             }
         }
 
-        static IsTypeArgumentOrParameterContext(context: FormattingContext): boolean {
-            return Rules.IsTypeArgumentOrParameter(context.currentTokenSpan, context.currentTokenParent) ||
-                Rules.IsTypeArgumentOrParameter(context.nextTokenSpan, context.nextTokenParent);
+        static IsTypeArgumentOrParameterOrAssertionContext(context: FormattingContext): boolean {
+            return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
+                Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
+        }
+
+        static IsTypeAssertionContext(context: FormattingContext): boolean {
+            return context.contextNode.kind === SyntaxKind.TypeAssertionExpression;
         }
 
         static IsVoidOpContext(context: FormattingContext): boolean {

src/services/formatting/rulesProvider.ts

@@ -71,6 +71,17 @@ namespace ts.formatting {
                 rules.push(this.globalRules.NoSpaceBetweenParens);
             }
 
+            if ( options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets ) {
+                rules.push( this.globalRules.SpaceAfterOpenBracket );
+                rules.push( this.globalRules.SpaceBeforeCloseBracket );
+                rules.push( this.globalRules.NoSpaceBetweenBrackets );
+            }
+            else {
+                rules.push( this.globalRules.NoSpaceAfterOpenBracket );
+                rules.push( this.globalRules.NoSpaceBeforeCloseBracket );
+                rules.push( this.globalRules.NoSpaceBetweenBrackets );
+            }
+
             if (options.InsertSpaceAfterSemicolonInForStatements) {
                 rules.push(this.globalRules.SpaceAfterSemicolonInFor);
             }

src/services/formatting/smartIndenter.ts

@@ -418,6 +418,7 @@ namespace ts.formatting {
                 case SyntaxKind.DefaultClause:
                 case SyntaxKind.CaseClause:
                 case SyntaxKind.ParenthesizedExpression:
+                case SyntaxKind.PropertyAccessExpression:
                 case SyntaxKind.CallExpression:
                 case SyntaxKind.NewExpression:
                 case SyntaxKind.VariableStatement:
@@ -427,6 +428,7 @@ namespace ts.formatting {
                 case SyntaxKind.ConditionalExpression:
                 case SyntaxKind.ArrayBindingPattern:
                 case SyntaxKind.ObjectBindingPattern:
+                case SyntaxKind.JsxElement:
                     return true;
             }
             return false;

src/services/shims.ts

@@ -60,10 +60,12 @@ namespace ts {
         getNewLine?(): string;
         getProjectVersion?(): string;
         useCaseSensitiveFileNames?(): boolean;
+        
+        getModuleResolutionsForFile?(fileName: string): string;
     }
 
     /** Public interface of the the of a config service shim instance.*/
-    export interface CoreServicesShimHost extends Logger {
+    export interface CoreServicesShimHost extends Logger, ModuleResolutionHost {
         /**
          * Returns a JSON-encoded value of the type: string[]
          *
@@ -205,6 +207,11 @@ namespace ts {
         getFormattingEditsForDocument(fileName: string, options: string/*Services.FormatCodeOptions*/): string;
         getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: string/*Services.FormatCodeOptions*/): string;
 
+        /**
+         * Returns JSON-encoded value of the type TextInsertion.
+         */
+        getDocCommentTemplateAtPosition(fileName: string, position: number): string;
+
         getEmitOutput(fileName: string): string;
     }
 
@@ -265,8 +272,18 @@ namespace ts {
         private files: string[];
         private loggingEnabled = false;
         private tracingEnabled = false;
-
+        
+        public resolveModuleNames: (moduleName: string[], containingFile: string) => string[];
+        
         constructor(private shimHost: LanguageServiceShimHost) {
+            // if shimHost is a COM object then property check will become method call with no arguments.
+            // 'in' does not have this effect. 
+            if ("getModuleResolutionsForFile" in this.shimHost) {
+                this.resolveModuleNames = (moduleNames: string[], containingFile: string) => {
+                    let resolutionsInFile = <Map<string>>JSON.parse(this.shimHost.getModuleResolutionsForFile(containingFile));
+                    return map(moduleNames, name => lookUp(resolutionsInFile, name));
+                };
+            }
         }
 
         public log(s: string): void {
@@ -405,6 +422,14 @@ namespace ts {
             }
             return JSON.parse(encoded);
         }
+        
+        public fileExists(fileName: string): boolean {
+            return this.shimHost.fileExists(fileName);
+        }
+        
+        public readFile(fileName: string): string {
+            return this.shimHost.readFile(fileName);
+        }
     }
 
     function simpleForwardCall(logger: Logger, actionDescription: string, action: () => any, logPerformance: boolean): any {
@@ -529,7 +554,7 @@ namespace ts {
         }
 
         private realizeDiagnostics(diagnostics: Diagnostic[]): { message: string; start: number; length: number; category: string; }[]{
-            var newLine = this.getNewLine();
+            var newLine = getNewLineOrDefaultFromHost(this.host);
             return ts.realizeDiagnostics(diagnostics, newLine);
         }
 
@@ -571,10 +596,6 @@ namespace ts {
                 });
         }
 
-        private getNewLine(): string {
-            return this.host.getNewLine ? this.host.getNewLine() : "\r\n";
-        }
-
         public getSyntacticDiagnostics(fileName: string): string {
             return this.forwardJSONCall(
                 "getSyntacticDiagnostics('" + fileName + "')",
@@ -751,7 +772,10 @@ namespace ts {
             return this.forwardJSONCall(
                 "getDocumentHighlights('" + fileName + "', " + position + ")",
                 () => {
-                    return this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
+                    var results = this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
+                    // workaround for VS document higlighting issue - keep only items from the initial file
+                    let normalizedName = normalizeSlashes(fileName).toLowerCase();
+                    return filter(results, r => normalizeSlashes(r.fileName).toLowerCase() === normalizedName);
                 });
         }
 
@@ -811,6 +835,13 @@ namespace ts {
                 });
         }
 
+        public getDocCommentTemplateAtPosition(fileName: string, position: number): string {
+            return this.forwardJSONCall(
+                "getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")",
+                () => this.languageService.getDocCommentTemplateAtPosition(fileName, position)
+            );
+        }
+
         /// NAVIGATE TO
 
         /** Return a list of symbols that are interesting to navigate to */
@@ -907,6 +938,13 @@ namespace ts {
         private forwardJSONCall(actionDescription: string, action: () => any): any {
             return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
         }
+        
+        public resolveModuleName(fileName: string, moduleName: string, compilerOptionsJson: string): string {
+            return this.forwardJSONCall(`resolveModuleName('${fileName}')`, () => {
+                let compilerOptions = <CompilerOptions>JSON.parse(compilerOptionsJson);
+                return resolveModuleName(moduleName, normalizeSlashes(fileName), compilerOptions, this.host);
+            }); 
+        }
 
         public getPreProcessedFileInfo(fileName: string, sourceTextSnapshot: IScriptSnapshot): string {
             return this.forwardJSONCall(
@@ -916,6 +954,7 @@ namespace ts {
                     var convertResult = {
                         referencedFiles: <IFileReference[]>[],
                         importedFiles: <IFileReference[]>[],
+                        ambientExternalModules: result.ambientExternalModules,
                         isLibFile: result.isLibFile
                     };
 

src/services/signatureHelp.ts

@@ -611,13 +611,11 @@ namespace ts.SignatureHelp {
                 let displayParts = mapToDisplayParts(writer =>
                     typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation));
 
-                let isOptional = hasQuestionToken(parameter.valueDeclaration);
-
                 return {
                     name: parameter.name,
                     documentation: parameter.getDocumentationComment(),
                     displayParts,
-                    isOptional
+                    isOptional: typeChecker.isOptionalParameter(<ParameterDeclaration>parameter.valueDeclaration)
                 };
             }
 

src/services/utilities.ts

@@ -414,6 +414,60 @@ namespace ts {
             }
         }
     }
+    
+    export function isInString(sourceFile: SourceFile, position: number) {
+        let token = getTokenAtPosition(sourceFile, position);
+        return token && token.kind === SyntaxKind.StringLiteral && position > token.getStart();
+    }
+
+    export function isInComment(sourceFile: SourceFile, position: number) {
+        return isInCommentHelper(sourceFile, position, /*predicate*/ undefined);
+    }
+
+    /**
+     * Returns true if the cursor at position in sourceFile is within a comment that additionally
+     * satisfies predicate, and false otherwise.
+     */
+    export function isInCommentHelper(sourceFile: SourceFile, position: number, predicate?: (c: CommentRange) => boolean): boolean {
+        let token = getTokenAtPosition(sourceFile, position);
+
+        if (token && position <= token.getStart()) {
+            let commentRanges = getLeadingCommentRanges(sourceFile.text, token.pos);
+                
+            // The end marker of a single-line comment does not include the newline character.
+            // In the following case, we are inside a comment (^ denotes the cursor position):
+            //
+            //    // asdf   ^\n
+            //
+            // But for multi-line comments, we don't want to be inside the comment in the following case:
+            //
+            //    /* asdf */^
+            //
+            // Internally, we represent the end of the comment at the newline and closing '/', respectively.
+            return predicate ?
+                forEach(commentRanges, c => c.pos < position &&
+                    (c.kind == SyntaxKind.SingleLineCommentTrivia ? position <= c.end : position < c.end) &&
+                    predicate(c)) :
+                forEach(commentRanges, c => c.pos < position &&
+                    (c.kind == SyntaxKind.SingleLineCommentTrivia ? position <= c.end : position < c.end));
+        }
+
+        return false;
+    }
+
+    export function hasDocComment(sourceFile: SourceFile, position: number) {
+        let token = getTokenAtPosition(sourceFile, position);
+
+        // First, we have to see if this position actually landed in a comment.
+        let commentRanges = getLeadingCommentRanges(sourceFile.text, token.pos);
+
+        return forEach(commentRanges, jsDocPrefix);
+        
+        function jsDocPrefix(c: CommentRange): boolean {
+            var text = sourceFile.text;
+            return text.length >= c.pos + 3 && text[c.pos] === '/' && text[c.pos + 1] === '*' && text[c.pos + 2] === '*';
+        }
+    }
 
     function nodeHasTokens(n: Node): boolean {
         // If we have a token or node that has a non-zero width, it must have tokens.
@@ -625,6 +679,14 @@ namespace ts {
         return displayPart(text, SymbolDisplayPartKind.text);
     }
 
+    const carriageReturnLineFeed = "\r\n";
+    /**
+     * The default is CRLF.
+     */
+    export function getNewLineOrDefaultFromHost(host: LanguageServiceHost | LanguageServiceShimHost) {
+        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
+    }
+
     export function lineBreakPart() {
         return displayPart("\n", SymbolDisplayPartKind.lineBreak);
     }