1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
|
=== tests/cases/compiler/typeArgumentConstraintResolution1.ts ===
function foo1<T extends Date>(test: T);
>foo1 : { <T extends Date>(test: T): any; <T extends Number>(test: string): any; }
>test : T
function foo1<T extends Number>(test: string);
>foo1 : { <T extends Date>(test: T): any; <T extends Number>(test: string): any; }
>test : string
function foo1<T extends String>(test: any) { }
>foo1 : { <T extends Date>(test: T): any; <T extends Number>(test: string): any; }
>test : any
foo1<Date>(""); // should error
>foo1<Date>("") : any
>foo1 : { <T extends Date>(test: T): any; <T extends Number>(test: string): any; }
>"" : ""
function foo2<T extends Date>(test: T): T;
>foo2 : { <T extends Date>(test: T): T; <T extends Number>(test: string): T; }
>test : T
function foo2<T extends Number>(test: string): T;
>foo2 : { <T extends Date>(test: T): T; <T extends Number>(test: string): T; }
>test : string
function foo2<T extends String>(test: any): any { return null; }
>foo2 : { <T extends Date>(test: T): T; <T extends Number>(test: string): T; }
>test : any
>null : null
foo2<Date>(""); // Type Date does not satisfy the constraint 'Number' for type parameter 'T extends Number'
>foo2<Date>("") : any
>foo2 : { <T extends Date>(test: T): T; <T extends Number>(test: string): T; }
>"" : ""
|