54 lines
1.7 KiB
TypeScript
54 lines
1.7 KiB
TypeScript
//// [genericTypeAssertions2.ts]
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class A<T> { foo(x: T) { } }
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class B<T> extends A<T> {
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bar(): T {
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return null;
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}
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}
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var foo = new A<number>();
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var r: A<string> = <B<string>>new B();
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var r2: A<number> = <B<string>>new B(); // error
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var r3: B<number> = <A<number>>new B(); // error
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var r4: A<number> = <A<number>>new A();
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var r5: A<number> = <A<number>>[]; // error
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//// [genericTypeAssertions2.js]
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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var A = /** @class */ (function () {
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function A() {
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}
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A.prototype.foo = function (x) { };
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return A;
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}());
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var B = /** @class */ (function (_super) {
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__extends(B, _super);
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function B() {
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return _super !== null && _super.apply(this, arguments) || this;
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}
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B.prototype.bar = function () {
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return null;
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};
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return B;
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}(A));
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var foo = new A();
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var r = new B();
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var r2 = new B(); // error
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var r3 = new B(); // error
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var r4 = new A();
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var r5 = []; // error
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