Add tests
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33
tests/cases/compiler/infiniteConstraints.ts
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33
tests/cases/compiler/infiniteConstraints.ts
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// @strict: true
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// Both of the following types trigger the recursion limiter in getImmediateBaseConstraint
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type T1<B extends { [K in keyof B]: Extract<B[Exclude<keyof B, K>], { val: string }>["val"] }> = B;
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type T2<B extends { [K in keyof B]: B[Exclude<keyof B, K>]["val"] }> = B;
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// Repros from #22950
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type AProp<T extends { a: string }> = T
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declare function myBug<
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T extends { [K in keyof T]: T[K] extends AProp<infer U> ? U : never }
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>(arg: T): T
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const out = myBug({obj1: {a: "test"}})
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type Value<V extends string = string> = Record<"val", V>;
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declare function value<V extends string>(val: V): Value<V>;
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declare function ensureNoDuplicates<
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T extends {
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[K in keyof T]: Extract<T[K], Value>["val"] extends Extract<T[Exclude<keyof T, K>], Value>["val"]
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? never
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: any
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}
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>(vals: T): void;
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const noError = ensureNoDuplicates({main: value("test"), alternate: value("test2")});
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const shouldBeNoError = ensureNoDuplicates({main: value("test")});
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const shouldBeError = ensureNoDuplicates({main: value("dup"), alternate: value("dup")});
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