f8b6a8fc8d
* Introduce literal freshness for literal enum members, allow enum references in ambient const initializers * Merge statements * Add enum literal readonly property test case * Accept better baselines post-merge
20 lines
573 B
TypeScript
20 lines
573 B
TypeScript
// repro from #22093
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enum A { one = "one", two = "two" };
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enum B { foo = "foo", bar = "bar" };
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type C = A | B.foo;
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type D = A | "foo";
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class List<T>
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{
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private readonly items: T[] = [];
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}
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function asList<T>(arg: T): List<T> { return new List(); }
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// TypeScript incorrectly infers the return type of "asList(x)" to be "List<A | B>"
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// The correct type is "List<A | B.foo>"
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function fn1(x: C): List<C> { return asList(x); }
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// If we use the literal "foo" instead of B.foo, the correct type is inferred
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function fn2(x: D): List<D> { return asList(x); } |