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This commit is contained in:
Vladimir Matveev
2016-03-17 07:05:33 -07:00
parent 6cf57b1bca
commit c9ef8be16c
1 changed files with 4 additions and 3 deletions
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7
src/compiler/emitter.ts
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@@ -4221,15 +4221,16 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
const isExported = getCombinedNodeFlags(node) & NodeFlags.Export;
if (languageVersion >= ScriptTarget.ES6 && (!isExported || modulekind === ModuleKind.ES6)) {
// emit ES6 destructuring only if target module is ES6 or variable is not exported
// exported variables in CJS\AMD are prefixed with 'exports.' so result javascript { exports.toString } = 1; is illegal
// exported variables in CJS/AMD are prefixed with 'exports.' so result javascript { exports.toString } = 1; is illegal
const isTopLevelDeclarationInSystemModule =
modulekind === ModuleKind.System &&
shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/true);
if (isTopLevelDeclarationInSystemModule) {
// in System modules top level variables are hoisted
// so variable declarations with destructuring are turned into destructuring assignments
// In System modules top level variables are hoisted
// so variable declarations with destructuring are turned into destructuring assignments.
// As a result, they will need parentheses to disambiguate object binding assignments from blocks.
write("(");
}