41 lines
812 B
TypeScript
41 lines
812 B
TypeScript
//// [genericTypeAssertions5.ts]
|
|
interface A {
|
|
foo(): string;
|
|
}
|
|
|
|
interface B extends A {
|
|
bar(): number;
|
|
}
|
|
|
|
interface C extends A {
|
|
baz(): number;
|
|
}
|
|
|
|
var a: A;
|
|
var b: B;
|
|
var c: C;
|
|
|
|
function foo2<T extends A>(x: T) {
|
|
var y = x;
|
|
y = a; // error: cannot convert A to T
|
|
y = b; // error: cannot convert B to T
|
|
y = c; // error: cannot convert C to T
|
|
y = <T>a;
|
|
y = <T>b; // error: cannot convert B to T
|
|
y = <T>c; // error: cannot convert C to T
|
|
}
|
|
|
|
//// [genericTypeAssertions5.js]
|
|
var a;
|
|
var b;
|
|
var c;
|
|
function foo2(x) {
|
|
var y = x;
|
|
y = a; // error: cannot convert A to T
|
|
y = b; // error: cannot convert B to T
|
|
y = c; // error: cannot convert C to T
|
|
y = a;
|
|
y = b; // error: cannot convert B to T
|
|
y = c; // error: cannot convert C to T
|
|
}
|