| // Copyright (c) 2022, 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 The Enum class behaves as if it was declared as: |
| /// |
| /// class Enum { |
| /// // No default constructor. |
| /// external int get index; |
| /// external String toString(); |
| /// } |
| /// We intend to (at least pretend to) let enum classes extend Enum, and let |
| /// mixins and members access the default index and toString() through super.. |
| /// (In practice, we may use a different class implementing Enum as the |
| /// superclass, but for checking the validity of super.index/super.toString(), |
| /// we analyze against Enum itself, so it must have non-abstract |
| /// implementations.) |
| /// |
| /// This all makes it look as if Enum would be a valid superclass for the mixin |
| /// applications and methods of the enhanced enum class. |
| /// |
| /// @description Check `index` and `toString()` members |
| /// @author sgrekhov@unipro.ru |
| |
| // SharedOptions=--enable-experiment=enhanced-enums |
| |
| import "../../Utils/expect.dart"; |
| |
| enum E1<T> { |
| e1<int>(42), |
| e2<String>("42"), |
| e3<bool>(true); |
| |
| const E1(T t); |
| } |
| |
| main() { |
| Expect.equals(0, E1.e1.index); |
| Expect.equals(1, E1.e2.index); |
| Expect.equals(2, E1.e3.index); |
| Expect.equals("E1.e1", E1.e1.toString()); |
| Expect.equals("E1.e2", E1.e2.toString()); |
| Expect.equals("E1.e3", E1.e3.toString()); |
| } |