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Remove unused code in resolveMappedTypeMembers

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This commit is contained in:
Anders Hejlsberg
2016-11-27 19:58:05 -08:00
parent 8ee5f7d64f
commit 9970606f35
1 changed files with 1 additions and 10 deletions
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11
src/compiler/checker.ts
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@@ -4494,7 +4494,6 @@ namespace ts {
function resolveMappedTypeMembers(type: MappedType) {
const members: SymbolTable = createMap<Symbol>();
let stringIndexInfo: IndexInfo;
let numberIndexInfo: IndexInfo;
// Resolve upfront such that recursive references see an empty object type.
setStructuredTypeMembers(type, emptySymbols, emptyArray, emptyArray, undefined, undefined);
// In { [P in K]: T }, we refer to P as the type parameter type, K as the constraint type,
@@ -4529,16 +4528,8 @@ namespace ts {
else if (t.flags & TypeFlags.String) {
stringIndexInfo = createIndexInfo(propType, isReadonly);
}
else if (t.flags & TypeFlags.Number) {
numberIndexInfo = createIndexInfo(propType, isReadonly);
}
});
// If we created both a string and a numeric string index signature, and if the two index
// signatures have identical types, discard the redundant numeric index signature.
if (stringIndexInfo && numberIndexInfo && isTypeIdenticalTo(stringIndexInfo.type, numberIndexInfo.type)) {
numberIndexInfo = undefined;
}
setStructuredTypeMembers(type, members, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
setStructuredTypeMembers(type, members, emptyArray, emptyArray, stringIndexInfo, undefined);
}
function getTypeParameterFromMappedType(type: MappedType) {