| // 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. |
| |
| /*@testedFeatures=checks*/ |
| library test; |
| |
| class B { |
| Object _x; |
| void f([num x = 10]) { |
| _x = x; |
| } |
| |
| void g({num x = 20}) { |
| _x = x; |
| } |
| |
| void check(Object expectedValue) { |
| if (_x != expectedValue) { |
| throw 'Expected _x == $expectedValue; got ${_x}'; |
| } |
| } |
| } |
| |
| abstract class I<T> { |
| void f([T x]); |
| void g({T x}); |
| } |
| |
| class C extends B implements I<num> {} |
| |
| main() { |
| C c = new C(); |
| c.f(); |
| c.check(10); |
| c.g(); |
| c.check(20); |
| } |