31 lines
1.1 KiB
Plaintext
31 lines
1.1 KiB
Plaintext
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectTypeArgsAndConstraints5.ts (3 errors) ====
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// Generic call with constraints infering type parameter from object member properties
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class C {
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x: string;
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}
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class D {
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x: string;
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y: string;
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}
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function foo<T, U extends T>(t: T, t2: U) {
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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return (x: T) => t2;
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}
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var c: C;
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var d: D;
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var r2 = foo(d, c); // the constraints are self-referencing, no downstream error
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var r9 = foo(() => 1, () => { }); // the constraints are self-referencing, no downstream error
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function other<T, U extends T>() {
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~~~~~~~~~~~
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!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
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var r5 = foo<T, U>(c, d); // error
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~
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!!! Argument of type 'C' is not assignable to parameter of type 'T'.
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}
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