| // Copyright (c) 2017, 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 |
| |
| import 'package:expect/expect.dart'; |
| |
| typedef Bar = int Function(int); |
| |
| int defaultBar(int value) => value + 1; |
| |
| class Foo { |
| final Bar bar; |
| |
| const Foo._(Bar bar) : bar = bar ?? defaultBar; |
| |
| const Foo.baz({Bar bar}) : this._(bar); |
| } |
| |
| void main() { |
| final foo = const Foo.baz(); |
| Expect.equals(2, foo.bar(1)); |
| } |
