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
39
40
41
42
43
44
45
46
47
48
49
50
51
|
//// [genericTypeAssertions2.ts]
class A<T> { foo(x: T) { } }
class B<T> extends A<T> {
bar(): T {
return null;
}
}
var foo = new A<number>();
var r: A<string> = <B<string>>new B();
var r2: A<number> = <B<string>>new B(); // error
var r3: B<number> = <A<number>>new B(); // error
var r4: A<number> = <A<number>>new A();
var r5: A<number> = <A<number>>[]; // error
//// [genericTypeAssertions2.js]
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var A = /** @class */ (function () {
function A() {
}
A.prototype.foo = function (x) { };
return A;
}());
var B = /** @class */ (function (_super) {
__extends(B, _super);
function B() {
return _super !== null && _super.apply(this, arguments) || this;
}
B.prototype.bar = function () {
return null;
};
return B;
}(A));
var foo = new A();
var r = new B();
var r2 = new B(); // error
var r3 = new B(); // error
var r4 = new A();
var r5 = []; // error
|
