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Only defer function type inference when contextual type is function type

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This commit is contained in:
Anders Hejlsberg 2019-04-25 17:32:27 -07:00
parent 50f5e160aa
commit be88d53ab3
1 changed files with 4 additions and 4 deletions
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8
src/compiler/checker.ts
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@ -23778,14 +23778,14 @@ namespace ts {
const constructSignature = getSingleSignature(type, SignatureKind.Construct, /*allowMembers*/ true);
const signature = callSignature || constructSignature;
if (signature && signature.typeParameters) {
if (checkMode & CheckMode.SkipGenericFunctions && getSingleCallOrConstructSignature(type)) {
skippedGenericFunction(node, checkMode);
return anyFunctionType;
}
const contextualType = getApparentTypeOfContextualType(<Expression>node);
if (contextualType && !isMixinConstructorType(contextualType)) {
const contextualSignature = getSingleSignature(getNonNullableType(contextualType), callSignature ? SignatureKind.Call : SignatureKind.Construct, /*allowMembers*/ false);
if (contextualSignature && !contextualSignature.typeParameters) {
if (checkMode & CheckMode.SkipGenericFunctions) {
skippedGenericFunction(node, checkMode);
return anyFunctionType;
}
const context = getInferenceContext(node)!;
// We have an expression that is an argument of a generic function for which we are performing
// type argument inference. The expression is of a function type with a single generic call