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no-invalid-assertion: disallow asserting string literal type to incompatible template literal type #735

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ajafff opened this issue Jan 6, 2021 · 0 comments

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awaiting more feedback enhancement

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ajafff commented Jan 6, 2021 •

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declare function get<T>(): T;

get<'foo'>() as `bar${string}`; // <-- invalid
get<'foo'>() as `foo${number}`; // <-- invalid
get<'foo'>() as `foo${string}`; // valid
get<'barfoo'>() as `bar${string}`; // valid
get<`bar${string}`>() as 'foo'; // compile error
get<`bar${string}`>() as `foo${string}`; // compile error

ajafff added enhancement awaiting more feedback labels

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