| // 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. | |
| // @dart=2.9 | |
| abstract class A { | |
| const A({ | |
| this.d = 3.14, | |
| this.s = 'default', | |
| }); | |
| final double d; | |
| final String s; | |
| } | |
| class B extends A with M { | |
| const B({double d = 2.71}) : super(d: d); | |
| } | |
| mixin M on A { | |
| m1() {} | |
| } |