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Remove getUnionTypeOfSubtypeConstituents

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This commit is contained in:
Mohamed Hegazy 2015-05-06 13:05:12 -07:00
parent 5e94ce65ed
commit 0a28a3ec80
1 changed files with 2 additions and 6 deletions
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8
src/compiler/checker.ts
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@ -3634,10 +3634,6 @@ module ts {
return type;
}
function getUnionTypeOfSubtypeConstituents(source: UnionType, target: Type): Type {
return getUnionType(filter(source.types, t => isTypeSubtypeOf(t, target)));
}
function getReducedTypeOfUnionType(type: UnionType): Type {
// If union type was created without subtype reduction, perform the deferred reduction now
if (!type.reducedType) {
@ -5399,7 +5395,7 @@ module ts {
}
// If the current type is a union type, remove all constituents that aren't subtypes of the target.
if (type.flags & TypeFlags.Union) {
return getUnionTypeOfSubtypeConstituents(<UnionType>type, targetType);
return getUnionType(filter((<UnionType>type).types, t => isTypeSubtypeOf(t, targetType)));
}
}
}
@ -5416,7 +5412,7 @@ module ts {
let instanceType = getUnionType(map(constructSignatures, signature => getReturnTypeOfSignature(getErasedSignature(signature))));
// Pickup type from union types
if (type.flags & TypeFlags.Union) {
return getUnionTypeOfSubtypeConstituents(<UnionType>type, instanceType);
return getUnionType(filter((<UnionType>type).types, t => isTypeSubtypeOf(t, instanceType)));
}
return instanceType;
}