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tvler/guard.ts

Created June 9, 2021 16:16
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A way to test if a Type adheres to a wider Supertype, without widening the initial Type
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guard.ts
type Guard<Type extends SuperType, SuperType> = Type;
const tuple = [1, 2, 3] as const;
type Test = Guard<typeof tuple, ReadonlyArray<number>>;
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