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Merge pull request #12064 from Microsoft/cacheSignatureInstantiations

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Cache generic signature instantiations
This commit is contained in:
Anders Hejlsberg
2016-11-07 17:16:05 -08:00
committed by GitHub
parent ddc4ae7eac 4c1e4169bd
commit 8f568d4740
5 changed files with 9 additions and 13 deletions
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8
src/compiler/checker.ts
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@@ -4232,7 +4232,7 @@ namespace ts {
for (const baseSig of baseSignatures) {
const typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
if (typeParamCount === typeArgCount) {
const sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
const sig = typeParamCount ? createSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
sig.typeParameters = classType.localTypeParameters;
sig.resolvedReturnType = classType;
result.push(sig);
@@ -4982,6 +4982,12 @@ namespace ts {
}
function getSignatureInstantiation(signature: Signature, typeArguments: Type[]): Signature {
const instantiations = signature.instantiations || (signature.instantiations = createMap<Signature>());
const id = getTypeListId(typeArguments);
return instantiations[id] || (instantiations[id] = createSignatureInstantiation(signature, typeArguments));
}
function createSignatureInstantiation(signature: Signature, typeArguments: Type[]): Signature {
return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
}

2
src/compiler/types.ts
View File

@@ -2923,6 +2923,8 @@ namespace ts {
isolatedSignatureType?: ObjectType; // A manufactured type that just contains the signature for purposes of signature comparison
/* @internal */
typePredicate?: TypePredicate;
/* @internal */
instantiations?: Map<Signature>; // Generic signature instantiation cache
}
export const enum IndexKind {