| // 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. |
| |
| import 'value_class_support_lib.dart'; |
| |
| class Animal { |
| final int numberOfLegs; |
| Animal({required this.numberOfLegs}); |
| } |
| |
| @valueClass |
| class Cat extends Animal { |
| final int numberOfWhiskers; |
| } |
| |
| main() { |
| Cat cat = new Cat(numberOfWhiskers: 20, numberOfLegs: 4); |
| (cat as dynamic).copyWith(numberOfWhiskers: 4); |
| } |
| |
| |
| |