| /* |
| * Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| * for details. All rights reserved. Use of this source code is governed by a |
| * BSD-style license that can be found in the LICENSE file. |
| */ |
| /** |
| * @assertion Evaluation of the cast expression e as T proceeds as follows: |
| * The expression e is evaluated to a value v. |
| * Then, if T is malformed, a dynamic error occurs. |
| * Otherwise, if the interface of the class of v is a subtype of T, the cast |
| * expression evaluates to v. |
| * Otherwise, if v is null, the cast expression evaluates to v. |
| * In all other cases, a CastError is thrown. |
| * @description Checks that the type cast operator works as specified when the |
| * type of v is a subtype of T. |
| * @author rodionov |
| * @reviewer iefremov |
| */ |
| import "../../Utils/expect.dart"; |
| |
| abstract class I {} |
| class C implements I { |
| C(this.x); |
| int x; |
| } |
| |
| main() { |
| var c=null; |
| Expect.equals(1, 1 as int); |
| Expect.equals(0, 0 as num); |
| Expect.equals(null, c as num); |
| Expect.equals("foo", "foo" as String); |
| Expect.equals("bar", "bar" as Pattern); |
| c = new C(1); |
| Expect.identical(c, c as I); |
| try { |
| c = 1 as I; |
| Expect.fail("CastError expected"); |
| } on CastError catch (e) {} |
| } |