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Merge pull request #13272 from Microsoft/externalExportStar

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Support for an external exportStar helper
This commit is contained in:
Ron Buckton
2017-06-07 13:59:54 -07:00
committed by GitHub
parent abb9681248 9250d0a290
commit d450b8b2ab
19 changed files with 177 additions and 46 deletions
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7
src/compiler/checker.ts
View File

@@ -21865,6 +21865,10 @@ namespace ts {
if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
error(node.moduleSpecifier, Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
}
if (modulekind !== ModuleKind.System && modulekind !== ModuleKind.ES2015) {
checkExternalEmitHelpers(node, ExternalEmitHelpers.ExportStar);
}
}
}
}
@@ -23539,7 +23543,8 @@ namespace ts {
case ExternalEmitHelpers.AsyncGenerator: return "__asyncGenerator";
case ExternalEmitHelpers.AsyncDelegator: return "__asyncDelegator";
case ExternalEmitHelpers.AsyncValues: return "__asyncValues";
default: Debug.fail("Unrecognized helper.");
case ExternalEmitHelpers.ExportStar: return "__exportStar";
default: Debug.fail("Unrecognized helper");
}
}

51
src/compiler/factory.ts
View File

@@ -3850,23 +3850,34 @@ namespace ts {
return emitNode && emitNode.externalHelpersModuleName;
}
export function getOrCreateExternalHelpersModuleNameIfNeeded(node: SourceFile, compilerOptions: CompilerOptions) {
if (compilerOptions.importHelpers && (isExternalModule(node) || compilerOptions.isolatedModules)) {
export function getOrCreateExternalHelpersModuleNameIfNeeded(node: SourceFile, compilerOptions: CompilerOptions, hasExportStarsToExportValues?: boolean) {
if (compilerOptions.importHelpers && isEffectiveExternalModule(node, compilerOptions)) {
const externalHelpersModuleName = getExternalHelpersModuleName(node);
if (externalHelpersModuleName) {
return externalHelpersModuleName;
}
const helpers = getEmitHelpers(node);
if (helpers) {
for (const helper of helpers) {
if (!helper.scoped) {
const parseNode = getOriginalNode(node, isSourceFile);
const emitNode = getOrCreateEmitNode(parseNode);
return emitNode.externalHelpersModuleName || (emitNode.externalHelpersModuleName = createUniqueName(externalHelpersModuleNameText));
const moduleKind = getEmitModuleKind(compilerOptions);
let create = hasExportStarsToExportValues
&& moduleKind !== ModuleKind.System
&& moduleKind !== ModuleKind.ES2015;
if (!create) {
const helpers = getEmitHelpers(node);
if (helpers) {
for (const helper of helpers) {
if (!helper.scoped) {
create = true;
break;
}
}
}
}
if (create) {
const parseNode = getOriginalNode(node, isSourceFile);
const emitNode = getOrCreateEmitNode(parseNode);
return emitNode.externalHelpersModuleName || (emitNode.externalHelpersModuleName = createUniqueName(externalHelpersModuleNameText));
}
}
}
@@ -4249,17 +4260,6 @@ namespace ts {
let exportEquals: ExportAssignment = undefined;
let hasExportStarsToExportValues = false;
const externalHelpersModuleName = getOrCreateExternalHelpersModuleNameIfNeeded(sourceFile, compilerOptions);
const externalHelpersImportDeclaration = externalHelpersModuleName && createImportDeclaration(
/*decorators*/ undefined,
/*modifiers*/ undefined,
createImportClause(/*name*/ undefined, createNamespaceImport(externalHelpersModuleName)),
createLiteral(externalHelpersModuleNameText));
if (externalHelpersImportDeclaration) {
externalImports.push(externalHelpersImportDeclaration);
}
for (const node of sourceFile.statements) {
switch (node.kind) {
case SyntaxKind.ImportDeclaration:
@@ -4370,6 +4370,17 @@ namespace ts {
}
}
const externalHelpersModuleName = getOrCreateExternalHelpersModuleNameIfNeeded(sourceFile, compilerOptions, hasExportStarsToExportValues);
const externalHelpersImportDeclaration = externalHelpersModuleName && createImportDeclaration(
/*decorators*/ undefined,
/*modifiers*/ undefined,
createImportClause(/*name*/ undefined, createNamespaceImport(externalHelpersModuleName)),
createLiteral(externalHelpersModuleNameText));
if (externalHelpersImportDeclaration) {
externalImports.unshift(externalHelpersImportDeclaration);
}
return { externalImports, exportSpecifiers, exportEquals, hasExportStarsToExportValues, exportedBindings, exportedNames, externalHelpersImportDeclaration };
}

24
src/compiler/transformers/module/module.ts
View File

@@ -103,7 +103,7 @@ namespace ts {
addRange(statements, endLexicalEnvironment());
const updated = updateSourceFileNode(node, setTextRange(createNodeArray(statements), node.statements));
if (currentModuleInfo.hasExportStarsToExportValues) {
if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
// If we have any `export * from ...` declarations
// we need to inform the emitter to add the __export helper.
addEmitHelper(updated, exportStarHelper);
@@ -408,7 +408,7 @@ namespace ts {
addRange(statements, endLexicalEnvironment());
const body = createBlock(statements, /*multiLine*/ true);
if (currentModuleInfo.hasExportStarsToExportValues) {
if (currentModuleInfo.hasExportStarsToExportValues && !compilerOptions.importHelpers) {
// If we have any `export * from ...` declarations
// we need to inform the emitter to add the __export helper.
addEmitHelper(body, exportStarHelper);
@@ -833,15 +833,7 @@ namespace ts {
// export * from "mod";
return setTextRange(
createStatement(
createCall(
createIdentifier("__export"),
/*typeArguments*/ undefined,
[
moduleKind !== ModuleKind.AMD
? createRequireCall(node)
: generatedName
]
)
createExportStarHelper(context, moduleKind !== ModuleKind.AMD ? createRequireCall(node) : generatedName)
),
node
);
@@ -1598,9 +1590,17 @@ namespace ts {
text: `
function __export(m) {
for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
}`
}
`
};
function createExportStarHelper(context: TransformationContext, module: Expression) {
const compilerOptions = context.getCompilerOptions();
return compilerOptions.importHelpers
? createCall(getHelperName("__exportStar"), /*typeArguments*/ undefined, [module, createIdentifier("exports")])
: createCall(createIdentifier("__export"), /*typeArguments*/ undefined, [module]);
}
// emit helper for dynamic import
const dynamicImportUMDHelper: EmitHelper = {
name: "typescript:dynamicimport-sync-require",

3
src/compiler/types.ts
View File

@@ -4097,6 +4097,7 @@ namespace ts {
AsyncGenerator = 1 << 12, // __asyncGenerator (used by ES2017 async generator transformation)
AsyncDelegator = 1 << 13, // __asyncDelegator (used by ES2017 async generator yield* transformation)
AsyncValues = 1 << 14, // __asyncValues (used by ES2017 for..await..of transformation)
ExportStar = 1 << 15, // __exportStar (used by CommonJS/AMD/UMD module transformation)
// Helpers included by ES2015 for..of
ForOfIncludes = Values,
@@ -4114,7 +4115,7 @@ namespace ts {
SpreadIncludes = Read | Spread,
FirstEmitHelper = Extends,
LastEmitHelper = AsyncValues
LastEmitHelper = ExportStar
}
export const enum EmitHint {