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Do not allow use of block-scoped variable before its definition

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This commit is contained in:
Mohamed Hegazy
2014-10-13 22:19:19 -07:00
parent cf89f5cf58
commit 1dde985f1d
16 changed files with 220 additions and 6 deletions
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src/compiler/checker.ts
+15
View File
@@ -314,6 +314,21 @@ module ts {
if (!s && nameNotFoundMessage) {
error(errorLocation, nameNotFoundMessage, nameArg);
}
if (s && s.flags & SymbolFlags.BlockScoped) {
var declaration = forEach(s.declarations, d => d.flags & NodeFlags.BlockScoped ? d : undefined);
Debug.assert(declaration, "Bock-scoped variable declaration is undefined");
var declarationSourceFile = getSourceFileOfNode(declaration);
var referenceSourceFile = getSourceFileOfNode(errorLocation);
if (declarationSourceFile === referenceSourceFile && declaration.pos > errorLocation.pos) {
error(errorLocation, Diagnostics.Block_scoped_variable_0_used_before_its_declaration, identifierToString(declaration.name));
}
else if (compilerOptions.out) {
var sourceFiles = program.getSourceFiles();
if (sourceFiles.indexOf(referenceSourceFile) < sourceFiles.indexOf(declarationSourceFile)) {
error(errorLocation, Diagnostics.Block_scoped_variable_0_used_before_its_declaration, identifierToString(declaration.name));
}
}
}
return s;
}
src/compiler/diagnosticInformationMap.generated.ts
+1
View File
@@ -269,6 +269,7 @@ module ts {
Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: DiagnosticCategory.Error, key: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: DiagnosticCategory.Error, key: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: DiagnosticCategory.Error, key: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: DiagnosticCategory.Error, key: "Block-scoped variable '{0}' used before its declaration." },
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_name_1_from_private_module_2: { code: 4001, category: DiagnosticCategory.Error, key: "Type parameter '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
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}'." },
src/compiler/diagnosticMessages.json
+10 -6
View File
@@ -451,27 +451,27 @@
"category": "Error",
"code": 1151
},
"'var', 'let' or 'const' expected.": {
"'var', 'let' or 'const' expected.": {
"category": "Error",
"code": 1152
},
"'let' variable declarations are only available when targeting ECMAScript 6 and higher.": {
"'let' variable declarations are only available when targeting ECMAScript 6 and higher.": {
"category": "Error",
"code": 1153
},
"'const' variable declarations are only available when targeting ECMAScript 6 and higher.": {
"'const' variable declarations are only available when targeting ECMAScript 6 and higher.": {
"category": "Error",
"code": 1154
},
"const must be intialized.": {
"const must be intialized.": {
"category": "Error",
"code": 1155
},
"const must be declared inside a block.": {
"const must be declared inside a block.": {
"category": "Error",
"code": 1156
},
"let must be declared inside a block.": {
"let must be declared inside a block.": {
"category": "Error",
"code": 1157
},
@@ -1068,6 +1068,10 @@
"category": "Error",
"code": 2447
},
"Block-scoped variable '{0}' used before its declaration.": {
"category": "Error",
"code": 2448
},
"Import declaration '{0}' is using private name '{1}'.": {
"category": "Error",