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getTypeFromArrayBindingPattern returns an iterable in ES6

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Jason Freeman
2015-03-24 18:39:25 -07:00
parent 8c2cd26103
commit 42ed6aab89
1 changed files with 10 additions and 1 deletions
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11
src/compiler/checker.ts
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@@ -2153,7 +2153,16 @@ module ts {
hasSpreadElement = true;
}
});
return !elementTypes.length ? anyArrayType : hasSpreadElement ? createArrayType(getUnionType(elementTypes)) : createTupleType(elementTypes);
if (!elementTypes.length) {
return languageVersion >= ScriptTarget.ES6 ? createIterableType(anyType) : anyArrayType;
}
else if (hasSpreadElement) {
var unionOfElements = getUnionType(elementTypes);
return languageVersion >= ScriptTarget.ES6 ? createIterableType(unionOfElements) : createArrayType(unionOfElements);
}
// If the pattern has at least one element, and no rest element, then it should imply a tuple type.
return createTupleType(elementTypes);
}
// Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself