| // 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 or deferred type, 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 throws a CastError when v |
| /// is not null and the type of v is not a subtype of T. |
| /// @author rodionov |
| |
| import '../../../Utils/expect.dart'; |
| |
| abstract class I {} |
| |
| class C implements I { |
| C(this.x); |
| int x; |
| } |
| |
| abstract class G<S, T> {} |
| |
| typedef bool func(int i); |
| |
| main() { |
| Expect.throws(() { 1 as func; }, (e) => e is TypeError); |
| Expect.throws(() { 1 as G<int, int>; }, (e) => e is TypeError); |
| Expect.throws(() { true as I; }, (e) => e is TypeError); |
| Expect.throws(() { C(1) as G<int, bool>; }, (e) => e is TypeError); |
| Expect.throws(() { (() => true) as func; }, (e) => e is TypeError); |
| Expect.throws(() { (() => true) as int; }, (e) => e is TypeError); |
| } |