| // Copyright (c) 2020, 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. | |
| abstract class A<T> { | |
| factory A(T value) = _A; | |
| } | |
| class _A<T> implements A<T> { | |
| _A(T value); | |
| } | |
| abstract class B<T> { | |
| factory B(int value) = _B; | |
| } | |
| class _B<T> implements B<T> { | |
| _B(int value); | |
| } | |
| main() {} |