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Fix signature help

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This commit is contained in:
Anders Hejlsberg
2017-09-02 15:39:14 -07:00
parent b65ff647c1
commit 601a21c77b
1 changed files with 1 additions and 2 deletions
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3
src/services/signatureHelp.ts
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@@ -372,8 +372,7 @@ namespace ts.SignatureHelp {
if (isTypeParameterList) {
isVariadic = false; // type parameter lists are not variadic
prefixDisplayParts.push(punctuationPart(SyntaxKind.LessThanToken));
// Use `.mapper` to ensure we get the generic type arguments even if this is an instantiated version of the signature.
const typeParameters = candidateSignature.typeParameters; // !!! candidateSignature.mapper ? candidateSignature.mapper.mappedTypes : candidateSignature.typeParameters;
const typeParameters = (candidateSignature.target || candidateSignature).typeParameters;
signatureHelpParameters = typeParameters && typeParameters.length > 0 ? map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
suffixDisplayParts.push(punctuationPart(SyntaxKind.GreaterThanToken));
const parameterParts = mapToDisplayParts(writer =>