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=== tests/cases/conformance/types/typeParameters/typeArgumentLists/typeParameterAsTypeParameterConstraint2.ts ===
// using a type parameter as a constraint for a type parameter is invalid
// these should be errors unless otherwise noted
function foo<T, U extends T>(x: T, y: U): U { return y; } // this is now an error
>foo : <T, U extends T>(x: T, y: U) => U
>x : T
>y : U
>y : U
foo(1, '');
>foo(1, '') : number
>foo : <T, U extends T>(x: T, y: U) => U
>1 : 1
>'' : ""
foo(1, {});
>foo(1, {}) : number
>foo : <T, U extends T>(x: T, y: U) => U
>1 : 1
>{} : {}
interface NumberVariant extends Number {
x: number;
>x : number
}
var n: NumberVariant;
>n : NumberVariant
var r3 = foo(1, n);
>r3 : number
>foo(1, n) : number
>foo : <T, U extends T>(x: T, y: U) => U
>1 : 1
>n : NumberVariant
function foo2<T, U extends { length: T }>(x: T, y: U) { return y; } // this is now an error
>foo2 : <T, U extends { length: T; }>(x: T, y: U) => U
>length : T
>x : T
>y : U
>y : U
foo2(1, { length: '' });
>foo2(1, { length: '' }) : { length: number; }
>foo2 : <T, U extends { length: T; }>(x: T, y: U) => U
>1 : 1
>{ length: '' } : { length: string; }
>length : string
>'' : ""
foo2(1, { length: {} });
>foo2(1, { length: {} }) : { length: number; }
>foo2 : <T, U extends { length: T; }>(x: T, y: U) => U
>1 : 1
>{ length: {} } : { length: {}; }
>length : {}
>{} : {}
foo2([], ['']);
>foo2([], ['']) : { length: any[]; }
>foo2 : <T, U extends { length: T; }>(x: T, y: U) => U
>[] : undefined[]
>[''] : string[]
>'' : ""
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