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Display support for nullable types

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This commit is contained in:
Anders Hejlsberg 2016-02-15 09:38:49 -08:00
parent 6d6d2a11bc
commit f08f6067e8
1 changed files with 4 additions and 1 deletions
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5
src/compiler/checker.ts
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@ -53,7 +53,6 @@ namespace ts {
const allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ModuleKind.System;
const strictNullChecks = compilerOptions.strictNullChecks;
const emitResolver = createResolver();
const undefinedSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Transient, "undefined");
@ -1873,6 +1872,10 @@ namespace ts {
else if (type.flags & TypeFlags.Tuple) {
writeTupleType(<TupleType>type);
}
else if (isNullableType(type)) {
writeType(getNonNullableType(type), TypeFormatFlags.InElementType);
writePunctuation(writer, SyntaxKind.QuestionToken);
}
else if (type.flags & TypeFlags.UnionOrIntersection) {
writeUnionOrIntersectionType(<UnionOrIntersectionType>type, flags);
}