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Merge pull request #8786 from rkirov/no_double_assignment

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do not emit double assignment of class expressions.
This commit is contained in:
Mohamed Hegazy
2016-05-26 10:59:55 -07:00
parent f012159220 699dc4f9bb
commit 8aa6a9dcd6
4 changed files with 34 additions and 24 deletions
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46
src/compiler/emitter.ts
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@@ -5359,17 +5359,17 @@ const _super = (function (geti, seti) {
//
// TypeScript | Javascript
// --------------------------------|------------------------------------
// @dec | let C_1;
// class C { | let C = C_1 = class C {
// static x() { return C.y; } | static x() { return C_1.y; }
// static y = 1; | }
// @dec | let C_1 = class C {
// class C { | static x() { return C_1.y; }
// static x() { return C.y; } | }
// static y = 1; | let C = C_1;
// } | C.y = 1;
// | C = C_1 = __decorate([dec], C);
// --------------------------------|------------------------------------
// @dec | let C_1;
// export class C { | export let C = C_1 = class C {
// static x() { return C.y; } | static x() { return C_1.y; }
// static y = 1; | }
// @dec | let C_1 = class C {
// export class C { | static x() { return C_1.y; }
// static x() { return C.y; } | }
// static y = 1; | export let C = C_1;
// } | C.y = 1;
// | C = C_1 = __decorate([dec], C);
// ---------------------------------------------------------------------
@@ -5398,10 +5398,10 @@ const _super = (function (geti, seti) {
//
// TypeScript | Javascript
// --------------------------------|------------------------------------
// @dec | let C_1;
// export default class C { | let C = C_1 = class C {
// static x() { return C.y; } | static x() { return C_1.y; }
// static y = 1; | }
// @dec | let C_1 = class C {
// export default class C { | static x() { return C_1.y; }
// static x() { return C.y; } | };
// static y = 1; | let C = C_1;
// } | C.y = 1;
// | C = C_1 = __decorate([dec], C);
// | export default C;
@@ -5410,25 +5410,25 @@ const _super = (function (geti, seti) {
//
// NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System.
// Because of hoisting top level class declaration need to be emitted as class expressions.
// Because of hoisting top level class declaration need to be emitted as class expressions.
// Double bind case is only required if node is decorated.
if (isDecorated && resolver.getNodeCheckFlags(node) & NodeCheckFlags.ClassWithBodyScopedClassBinding) {
decoratedClassAlias = unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
decoratedClassAliases[getNodeId(node)] = decoratedClassAlias;
write(`let ${decoratedClassAlias};`);
writeLine();
}
if (isES6ExportedDeclaration(node) && !(node.flags & NodeFlags.Default)) {
if (isES6ExportedDeclaration(node) && !(node.flags & NodeFlags.Default) && decoratedClassAlias === undefined) {
write("export ");
}
if (!isHoistedDeclarationInSystemModule) {
write("let ");
}
emitDeclarationName(node);
if (decoratedClassAlias !== undefined) {
write(` = ${decoratedClassAlias}`);
write(`${decoratedClassAlias}`);
}
else {
emitDeclarationName(node);
}
write(" = ");
@@ -5490,6 +5490,16 @@ const _super = (function (geti, seti) {
emitToken(SyntaxKind.CloseBraceToken, node.members.end);
if (rewriteAsClassExpression) {
if (decoratedClassAlias !== undefined) {
write(";");
writeLine();
if (isES6ExportedDeclaration(node) && !(node.flags & NodeFlags.Default)) {
write("export ");
}
write("let ");
emitDeclarationName(node);
write(` = ${decoratedClassAlias}`);
}
decoratedClassAliases[getNodeId(node)] = undefined;
write(";");
}