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Clarify code checking for UMD exports... #9897

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Merged
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Sep 14, 2016
Merged

Clarify code checking for UMD exports... #9897

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aded015
Clarify code checking for UMD exports and eagerly return `undefined` …
Jul 22, 2016
b58f4dd
Respond to PR comments
Jul 22, 2016
715d3f2
Merge branch 'master' into umd_export
Sep 13, 2016
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11 changes: 5 additions & 6 deletions src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -18398,7 +18398,7 @@ namespace ts {

// When resolved as an expression identifier, if the given node references an exported entity, return the declaration
// node of the exported entity's container. Otherwise, return undefined.
function getReferencedExportContainer(node: Identifier, prefixLocals?: boolean): SourceFile | ModuleDeclaration | EnumDeclaration {
function getReferencedExportContainer(node: Identifier, prefixLocals?: boolean): SourceFile | ModuleDeclaration | EnumDeclaration | undefined {
node = getParseTreeNode(node, isIdentifier);
if (node) {
// When resolving the export container for the name of a module or enum
Expand All @@ -18420,10 +18420,11 @@ namespace ts {
const parentSymbol = getParentOfSymbol(symbol);
if (parentSymbol) {
if (parentSymbol.flags & SymbolFlags.ValueModule && parentSymbol.valueDeclaration.kind === SyntaxKind.SourceFile) {
const symbolFile = <SourceFile>parentSymbol.valueDeclaration;
const referenceFile = getSourceFileOfNode(node);
// If `node` accesses an export and that export isn't in the same file, then symbol is a namespace export, so return undefined.
if (parentSymbol.valueDeclaration === getSourceFileOfNode(node)) {
return <SourceFile>parentSymbol.valueDeclaration;
}
const symbolIsUmdExport = symbolFile !== referenceFile;
return symbolIsUmdExport ? undefined : symbolFile;
}
for (let n = node.parent; n; n = n.parent) {
if (isModuleOrEnumDeclaration(n) && getSymbolOfNode(n) === parentSymbol) {
Expand All @@ -18433,8 +18434,6 @@ namespace ts {
}
}
}

return undefined;
}

// When resolved as an expression identifier, if the given node references an import, return the declaration of
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