52 lines
2.6 KiB
Plaintext
52 lines
2.6 KiB
Plaintext
=== tests/cases/compiler/inferTypeParameterConstraints.ts ===
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// Repro from #42636
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type SubGuard<A, X extends [A]> = X;
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>SubGuard : Symbol(SubGuard, Decl(inferTypeParameterConstraints.ts, 0, 0))
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>A : Symbol(A, Decl(inferTypeParameterConstraints.ts, 2, 14))
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>X : Symbol(X, Decl(inferTypeParameterConstraints.ts, 2, 16))
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>A : Symbol(A, Decl(inferTypeParameterConstraints.ts, 2, 14))
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>X : Symbol(X, Decl(inferTypeParameterConstraints.ts, 2, 16))
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type IsSub<M extends any[], S extends any[]> = M extends [...SubGuard<M[number], infer B>, ...S, ...any[]] ? B : never;
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>IsSub : Symbol(IsSub, Decl(inferTypeParameterConstraints.ts, 2, 36))
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>M : Symbol(M, Decl(inferTypeParameterConstraints.ts, 4, 11))
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>S : Symbol(S, Decl(inferTypeParameterConstraints.ts, 4, 27))
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>M : Symbol(M, Decl(inferTypeParameterConstraints.ts, 4, 11))
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>SubGuard : Symbol(SubGuard, Decl(inferTypeParameterConstraints.ts, 0, 0))
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>M : Symbol(M, Decl(inferTypeParameterConstraints.ts, 4, 11))
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>B : Symbol(B, Decl(inferTypeParameterConstraints.ts, 4, 86))
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>S : Symbol(S, Decl(inferTypeParameterConstraints.ts, 4, 27))
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>B : Symbol(B, Decl(inferTypeParameterConstraints.ts, 4, 86))
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type E0 = IsSub<[1, 2, 3, 4], [2, 3, 4]>; // [1 | 2 | 3 | 4]
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>E0 : Symbol(E0, Decl(inferTypeParameterConstraints.ts, 4, 119))
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>IsSub : Symbol(IsSub, Decl(inferTypeParameterConstraints.ts, 2, 36))
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type E1 = [1, 2, 3, 4] extends [...infer B, 2, 3, 4, ...any[]] ? B : never; // unknown[]
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>E1 : Symbol(E1, Decl(inferTypeParameterConstraints.ts, 6, 41))
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>B : Symbol(B, Decl(inferTypeParameterConstraints.ts, 8, 40))
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>B : Symbol(B, Decl(inferTypeParameterConstraints.ts, 8, 40))
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// Repro from #42636
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type Constrain<T extends C, C> = unknown;
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>Constrain : Symbol(Constrain, Decl(inferTypeParameterConstraints.ts, 8, 75))
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>T : Symbol(T, Decl(inferTypeParameterConstraints.ts, 12, 15))
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>C : Symbol(C, Decl(inferTypeParameterConstraints.ts, 12, 27))
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>C : Symbol(C, Decl(inferTypeParameterConstraints.ts, 12, 27))
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type Foo<A> = A extends Constrain<infer X, A> ? X : never;
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>Foo : Symbol(Foo, Decl(inferTypeParameterConstraints.ts, 12, 41))
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>A : Symbol(A, Decl(inferTypeParameterConstraints.ts, 14, 9))
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>A : Symbol(A, Decl(inferTypeParameterConstraints.ts, 14, 9))
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>Constrain : Symbol(Constrain, Decl(inferTypeParameterConstraints.ts, 8, 75))
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>X : Symbol(X, Decl(inferTypeParameterConstraints.ts, 14, 39))
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>A : Symbol(A, Decl(inferTypeParameterConstraints.ts, 14, 9))
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>X : Symbol(X, Decl(inferTypeParameterConstraints.ts, 14, 39))
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type T0 = Foo<string>; // string
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>T0 : Symbol(T0, Decl(inferTypeParameterConstraints.ts, 14, 58))
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>Foo : Symbol(Foo, Decl(inferTypeParameterConstraints.ts, 12, 41))
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