23 lines
951 B
Plaintext
23 lines
951 B
Plaintext
==== tests/cases/compiler/generics1.ts (3 errors) ====
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interface A { a: string; }
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interface B extends A { b: string; }
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interface C extends B { c: string; }
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interface G<T, U extends B> {
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x: T;
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y: U;
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}
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var v1: G<A, C>; // Ok
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var v2: G<{ a: string }, C>; // Ok, equivalent to G<A, C>
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var v3: G<A, A>; // Error, A not valid argument for U
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~~~~~~~
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!!! Type 'A' does not satisfy the constraint 'B':
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!!! Property 'b' is missing in type 'A'.
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var v4: G<G<A, B>, C>; // Ok
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var v5: G<any, any>; // Error, any does not satisfy constraint B
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var v6: G<any>; // Error, wrong number of arguments
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~~~~~~
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!!! Generic type 'G<T, U>' requires 2 type argument(s).
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var v7: G; // Error, no type arguments
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~
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!!! Generic type 'G<T, U>' requires 2 type argument(s).
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