68 lines
1.6 KiB
TypeScript
68 lines
1.6 KiB
TypeScript
//// [genericTypeAssertions4.ts]
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class A {
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foo() { return ""; }
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}
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class B extends A {
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bar() { return 1; }
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}
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class C extends A {
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baz() { return 1; }
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}
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var a: A;
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var b: B;
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var c: C;
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function foo2<T extends A>(x: T) {
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var y = x;
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y = a; // error: cannot convert A to T
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y = b; // error: cannot convert B to T
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y = c; // error: cannot convert C to T
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y = <T>a;
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y = <T>b; // error: cannot convert B to T
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y = <T>c; // error: cannot convert C to T
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}
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//// [genericTypeAssertions4.js]
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var __extends = (this && this.__extends) || function (d, b) {
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for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
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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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var A = (function () {
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function A() {
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}
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A.prototype.foo = function () { return ""; };
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return A;
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}());
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var B = (function (_super) {
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__extends(B, _super);
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function B() {
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_super.apply(this, arguments);
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}
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B.prototype.bar = function () { return 1; };
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return B;
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}(A));
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var C = (function (_super) {
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__extends(C, _super);
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function C() {
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_super.apply(this, arguments);
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}
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C.prototype.baz = function () { return 1; };
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return C;
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}(A));
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var a;
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var b;
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var c;
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function foo2(x) {
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var y = x;
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y = a; // error: cannot convert A to T
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y = b; // error: cannot convert B to T
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y = c; // error: cannot convert C to T
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y = a;
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y = b; // error: cannot convert B to T
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y = c; // error: cannot convert C to T
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}
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