| /* |
| * 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 evaluates to null when |
| * the first argument evaluates to null. |
| * @author rodionov |
| * @reviewer kaigorodov |
| */ |
| import "../../Utils/expect.dart"; |
| |
| n() => null; |
| |
| class C {} |
| abstract class G<S, T> {} |
| typedef bool func(int); |
| |
| main() { |
| Expect.isNull(n() as int, "null expected"); |
| Expect.isNull(null as C, "null expected"); |
| Expect.isNull(n() as G<int, bool>, "null expected"); |
| Expect.isNull(n() as func, "null expected"); |
| } |