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Make types of optional parameters and properties nullable

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This commit is contained in:
Anders Hejlsberg 2016-02-15 17:02:43 -08:00
parent 09fa3e5e15
commit 41401c7cae
1 changed files with 3 additions and 2 deletions
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5
src/compiler/checker.ts
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@ -2677,7 +2677,8 @@ namespace ts {
// Use type from type annotation if one is present
if (declaration.type) {
return getTypeFromTypeNode(declaration.type);
const type = getTypeFromTypeNode(declaration.type);
return declaration.questionToken ? getNullableType(type) : type;
}
if (declaration.kind === SyntaxKind.Parameter) {
@ -2692,7 +2693,7 @@ namespace ts {
// Use contextual parameter type if one is available
const type = getContextuallyTypedParameterType(<ParameterDeclaration>declaration);
if (type) {
return type;
return declaration.questionToken ? getNullableType(type) : type;
}
}