maxmustermann/TypeScript
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Revert to declared type when '!' postfix operator would produce 'nothing'

Browse source
This commit is contained in:
Anders Hejlsberg 2016-05-11 09:26:03 -07:00
parent 8c9348d8d6
commit 5edf72666d
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
src/compiler/checker.ts
View file

@ -7621,6 +7621,9 @@ namespace ts {
const visitedFlowStart = visitedFlowCount;
const result = getTypeAtFlowNode(reference.flowNode);
visitedFlowCount = visitedFlowStart;
if (reference.parent.kind === SyntaxKind.NonNullExpression && getTypeWithFacts(result, TypeFacts.NEUndefinedOrNull) === nothingType) {
return declaredType;
}
return result;
function getTypeAtFlowNode(flow: FlowNode): Type {