c456bbd466
* New aliases for type alias instantiations * New aliases for conditional, mapped, and anonymous object type instantiations * Accept new baselines * Fix issues with re-aliasing * Accept new baselines
43 lines
1.1 KiB
Plaintext
43 lines
1.1 KiB
Plaintext
=== tests/cases/compiler/deferredLookupTypeResolution2.ts ===
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// Repro from #17456
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type StringContains<S extends string, L extends string> = ({ [K in S]: 'true' } & { [key: string]: 'false'})[L];
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>StringContains : StringContains<S, L>
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>key : string
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type ObjectHasKey<O, L extends string> = StringContains<Extract<keyof O, string>, L>;
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>ObjectHasKey : ObjectHasKey<O, L>
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type A<T> = ObjectHasKey<T, '0'>;
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>A : A<T>
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type B = ObjectHasKey<[string, number], '1'>; // "true"
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>B : "true"
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type C = ObjectHasKey<[string, number], '2'>; // "false"
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>C : "false"
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type D = A<[string]>; // "true"
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>D : "true"
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// Error, "false" not handled
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type E<T> = { true: 'true' }[ObjectHasKey<T, '1'>];
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>E : E<T>
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>true : "true"
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type Juxtapose<T> = ({ true: 'otherwise' } & { [k: string]: 'true' })[ObjectHasKey<T, '1'>];
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>Juxtapose : Juxtapose<T>
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>true : "otherwise"
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>k : string
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// Error, "otherwise" is missing
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type DeepError<T> = { true: 'true' }[Juxtapose<T>];
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>DeepError : DeepError<T>
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>true : "true"
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type DeepOK<T> = { true: 'true', otherwise: 'false' }[Juxtapose<T>];
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>DeepOK : DeepOK<T>
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>true : "true"
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>otherwise : "false"
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