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
|
interface IFoo<T> {
foo(x: T): T;
}
var iFoo: IFoo<number>;
iFoo.foo(1);
class IntFooBad implements IFoo<number> { // error
foo(x: string): string { return null; }
}
var intFooBad: IntFooBad;
class IntFoo implements IFoo<number> {
foo(x: number): number { return null; }
}
var intFoo: IntFoo;
class StringFoo2 implements IFoo<string> {
foo(x: string): string { return null; }
}
var stringFoo2: StringFoo2;
stringFoo2.foo("hm");
intFoo = stringFoo2; // error
stringFoo2 = intFoo; // error
class StringFoo3 implements IFoo<string> { // error
foo<T>(x: T): T { return null; }
}
var stringFoo3: StringFoo3;
|