//// [genericTypeAssertions2.ts] class A { foo(x: T) { } } class B extends A { bar(): T { return null; } } var foo = new A(); var r: A = >new B(); var r2: A = >new B(); // error var r3: B = >new B(); // error var r4: A = >new A(); var r5: A = >[]; // error //// [genericTypeAssertions2.js] var __extends = (this && this.__extends) || function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; function __() { this.constructor = d; } __.prototype = b.prototype; d.prototype = new __(); }; var A = (function () { function A() { } A.prototype.foo = function (x) { }; return A; })(); var B = (function (_super) { __extends(B, _super); function B() { _super.apply(this, arguments); } 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