40 lines
No EOL
1.3 KiB
Text
40 lines
No EOL
1.3 KiB
Text
==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithObjectTypeArgsAndConstraints4.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 r = foo(c, d);
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var r2 = foo(d, c); // error because C does not extend D
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var r3 = foo(c, { x: '', foo: c });
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var r4 = foo(null, null);
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var r5 = foo({}, null);
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var r6 = foo(null, {});
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var r7 = foo({}, {});
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var r8 = foo(() => { }, () => { });
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var r9 = foo(() => { }, () => 1);
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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 r4 = foo(c, d);
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var r5 = foo<T, U>(c, d); // error
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~~~~~~~~~~~~~~~
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!!! Supplied parameters do not match any signature of call target.
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}
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