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Ron Buckton
2016-11-14 15:26:33 -08:00
parent db4ea4a008
commit cb1bb19358
1 changed files with 2 additions and 2 deletions
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src/compiler/checker.ts
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@@ -17257,10 +17257,10 @@ namespace ts {
function checkElementTypeOfArrayOrString(arrayOrStringType: Type, errorNode: Node): Type {
Debug.assert(languageVersion < ScriptTarget.ES2015);
// After we remove all types that are StringLike, we will know if there was a string constituent
// based on whether the remaining type is the same as the initial type.
let arrayType = arrayOrStringType;
if (arrayOrStringType.flags & TypeFlags.Union) {
// After we remove all types that are StringLike, we will know if there was a string constituent
// based on whether the result of filter is a new array.
const arrayTypes = (arrayOrStringType as UnionType).types;
const filteredTypes = filter(arrayTypes, t => !(t.flags & TypeFlags.StringLike));
if (filteredTypes !== arrayTypes) {