69 lines
2.8 KiB
Plaintext
69 lines
2.8 KiB
Plaintext
==== tests/cases/conformance/types/typeParameters/typeArgumentLists/functionConstraintSatisfaction2.ts (14 errors) ====
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// satisfaction of a constraint to Function, all of these invocations are errors unless otherwise noted
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function foo<T extends Function>(x: T): T { return x; }
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foo(1);
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~
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!!! Argument of type 'number' is not assignable to parameter of type 'Function'.
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foo(() => { }, 1);
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~~~~~~~~~~~~~~~~~
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!!! Supplied parameters do not match any signature of call target.
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foo(1, () => { });
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~~~~~~~~~~~~~~~~~
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!!! Supplied parameters do not match any signature of call target.
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function foo2<T extends (x: string) => string>(x: T): T { return x; }
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class C {
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foo: string;
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}
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var b: { new (x: string): string };
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class C2<T> {
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foo: T;
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}
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var b2: { new <T>(x: T): T };
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var r = foo2(new Function());
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~~~~~~~~~~~~~~
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!!! Argument of type 'Function' is not assignable to parameter of type '(x: string) => string'.
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var r2 = foo2((x: string[]) => x);
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~~~~~~~~~~~~~~~~~~
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!!! Argument of type '(x: string[]) => string[]' is not assignable to parameter of type '(x: string) => string'.
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var r6 = foo2(C);
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~
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!!! Argument of type 'typeof C' is not assignable to parameter of type '(x: string) => string'.
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var r7 = foo2(b);
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~
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!!! Argument of type 'new (x: string) => string' is not assignable to parameter of type '(x: string) => string'.
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var r8 = foo2(<U>(x: U) => x); // no error expected
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var r11 = foo2(<U, V>(x: U, y: V) => x);
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~~~~~~~~~~~~~~~~~~~~~~~
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!!! Argument of type '<U, V>(x: U, y: V) => U' is not assignable to parameter of type '(x: string) => string'.
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var r13 = foo2(C2);
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~~
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!!! Argument of type 'typeof C2' is not assignable to parameter of type '(x: string) => string'.
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var r14 = foo2(b2);
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~~
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!!! Argument of type 'new <T>(x: T) => T' is not assignable to parameter of type '(x: string) => string'.
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interface F2 extends Function { foo: string; }
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var f2: F2;
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var r16 = foo2(f2);
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~~
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!!! Argument of type 'F2' is not assignable to parameter of type '(x: string) => string'.
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function fff<T extends { (): void }, U extends T>(x: T, y: 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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foo2(x);
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~
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!!! Argument of type 'T' is not assignable to parameter of type '(x: string) => string'.
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foo2(y);
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~
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!!! Argument of type 'U' is not assignable to parameter of type '(x: string) => string'.
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}
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