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Merge pull request #8739 from evansb/fix-8738

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Fix #8738: Handles Re-assignment of Exported Clause Member
This commit is contained in:
Vladimir Matveev
2016-06-07 16:23:02 -07:00
parent 6913c32db6 47eac4f4af
commit 8b7fb8e7e8
5 changed files with 212 additions and 10 deletions
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74
src/compiler/emitter.ts
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@@ -2613,11 +2613,21 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true);
}
function isNameOfExportedDeclarationInNonES6Module(node: Node): boolean {
if (modulekind === ModuleKind.System || node.kind !== SyntaxKind.Identifier || nodeIsSynthesized(node)) {
return false;
}
return !exportEquals && exportSpecifiers && hasProperty(exportSpecifiers, (<Identifier>node).text);
}
function emitPrefixUnaryExpression(node: PrefixUnaryExpression) {
const exportChanged = (node.operator === SyntaxKind.PlusPlusToken || node.operator === SyntaxKind.MinusMinusToken) &&
const isPlusPlusOrMinusMinus = (node.operator === SyntaxKind.PlusPlusToken
|| node.operator === SyntaxKind.MinusMinusToken);
const externalExportChanged = isPlusPlusOrMinusMinus &&
isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
if (exportChanged) {
if (externalExportChanged) {
// emit
// ++x
// as
@@ -2626,6 +2636,12 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
emitNodeWithoutSourceMap(node.operand);
write(`", `);
}
const internalExportChanged = isPlusPlusOrMinusMinus &&
isNameOfExportedDeclarationInNonES6Module(node.operand);
if (internalExportChanged) {
emitAliasEqual(<Identifier> node.operand);
}
write(tokenToString(node.operator));
// In some cases, we need to emit a space between the operator and the operand. One obvious case
@@ -2651,14 +2667,16 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
}
emit(node.operand);
if (exportChanged) {
if (externalExportChanged) {
write(")");
}
}
function emitPostfixUnaryExpression(node: PostfixUnaryExpression) {
const exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
if (exportChanged) {
const externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
const internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand);
if (externalExportChanged) {
// export function returns the value that was passes as the second argument
// however for postfix unary expressions result value should be the value before modification.
// emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
@@ -2676,6 +2694,16 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
write(") + 1)");
}
}
else if (internalExportChanged) {
emitAliasEqual(<Identifier> node.operand);
emit(node.operand);
if (node.operator === SyntaxKind.PlusPlusToken) {
write(" += 1");
}
else {
write(" -= 1");
}
}
else {
emit(node.operand);
write(tokenToString(node.operator));
@@ -2777,24 +2805,50 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
}
}
function emitAliasEqual(name: Identifier): boolean {
for (const specifier of exportSpecifiers[name.text]) {
emitStart(specifier.name);
emitContainingModuleName(specifier);
if (languageVersion === ScriptTarget.ES3 && name.text === "default") {
write('["default"]');
}
else {
write(".");
emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
}
emitEnd(specifier.name);
write(" = ");
}
return true;
}
function emitBinaryExpression(node: BinaryExpression) {
if (languageVersion < ScriptTarget.ES6 && node.operatorToken.kind === SyntaxKind.EqualsToken &&
(node.left.kind === SyntaxKind.ObjectLiteralExpression || node.left.kind === SyntaxKind.ArrayLiteralExpression)) {
emitDestructuring(node, node.parent.kind === SyntaxKind.ExpressionStatement);
}
else {
const exportChanged =
node.operatorToken.kind >= SyntaxKind.FirstAssignment &&
node.operatorToken.kind <= SyntaxKind.LastAssignment &&
const isAssignment = isAssignmentOperator(node.operatorToken.kind);
const externalExportChanged = isAssignment &&
isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
if (exportChanged) {
if (externalExportChanged) {
// emit assignment 'x <op> y' as 'exports("x", x <op> y)'
write(`${exportFunctionForFile}("`);
emitNodeWithoutSourceMap(node.left);
write(`", `);
}
const internalExportChanged = isAssignment &&
isNameOfExportedDeclarationInNonES6Module(node.left);
if (internalExportChanged) {
// export { foo }
// emit foo = 2 as exports.foo = foo = 2
emitAliasEqual(<Identifier>node.left);
}
if (node.operatorToken.kind === SyntaxKind.AsteriskAsteriskToken || node.operatorToken.kind === SyntaxKind.AsteriskAsteriskEqualsToken) {
// Downleveled emit exponentiation operator using Math.pow
emitExponentiationOperator(node);
@@ -2815,7 +2869,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
}
if (exportChanged) {
if (externalExportChanged) {
write(")");
}
}