| // Copyright (c) 2023, 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 An instance field is promotable if all the following conditions |
| /// hold: |
| /// - It refers to a field (not a getter) |
| /// - The field is private |
| /// - The field is final |
| /// - There is no getter with the same name elsewhere in the library |
| /// - There is no non-final field with the same name elsewhere in the library |
| /// - There is no implicit noSuchMethod forwarder with the same name elsewhere |
| /// in the library. |
| /// |
| /// @description Checks that if there are other concrete class instance getters |
| /// with the same name in the same library and they are not final fields then |
| /// the field is not promotable. Test the case when there is a member with the |
| /// same name in some extension type in the same library. In this case promotion |
| /// is allowed |
| /// @author sgrekhov22@gmail.com |
| /// @issue 53437, language#3326 |
| |
| import "dart:math"; |
| |
| enum E { |
| e1(1), e2(2); |
| final num? _x; |
| |
| const E(this._x); |
| |
| void testE() { |
| if (_x is int) { |
| _x.isOdd; |
| } |
| } |
| } |
| |
| extension type ET1(int id) { |
| num? get _x => Random().nextBool() ? null : 42; |
| } |
| |
| extension type ET2(int _x) {} |
| |
| main() { |
| var v = E.e1; |
| if (v._x is int) { |
| v._x.isEven; |
| } |
| E.e1.testE(); |
| } |