| // 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 |
| |
| class C<T> { |
| final T _x; |
| C(this._x); |
| |
| void testC() { |
| if (_x is int) { |
| _x.isOdd; |
| } |
| } |
| } |
| |
| extension type ET1(int id) { |
| String get _x => "Lily was here"; |
| } |
| |
| extension type ET2(int _x) {} |
| |
| main() { |
| C<num?> c = C(43); |
| if (c._x is int) { |
| c._x.isEven; |
| } |
| c.testC(); |
| } |