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Merge pull request #16505 from Microsoft/decl-emit-parenthesize-keyof

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Add parentheses around keyof in declaration emit when needed
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Nathan Shively-Sanders
2017-06-13 14:17:49 -07:00
committed by GitHub
parent 6370fc8b85 2d2ac6794f
commit 57f8648b0f
5 changed files with 68 additions and 0 deletions
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6
src/compiler/checker.ts
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@@ -3233,9 +3233,15 @@ namespace ts {
writer.writeStringLiteral(literalTypeToString(<LiteralType>type));
}
else if (type.flags & TypeFlags.Index) {
if (flags & TypeFormatFlags.InElementType) {
writePunctuation(writer, SyntaxKind.OpenParenToken);
}
writer.writeKeyword("keyof");
writeSpace(writer);
writeType((<IndexType>type).type, TypeFormatFlags.InElementType);
if (flags & TypeFormatFlags.InElementType) {
writePunctuation(writer, SyntaxKind.CloseParenToken);
}
}
else if (type.flags & TypeFlags.IndexedAccess) {
writeType((<IndexedAccessType>type).objectType, TypeFormatFlags.InElementType);