| // Copyright (c) 2016, 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. |
| |
| // In non strong-mode, `FutureOr<T>` is dynamic, even if `T` doesn't exist. |
| // `FutureOr<T>` can not be used as superclass, mixin, nor can it be |
| // implemented (as interface). |
| |
| import 'dart:async'; |
| import 'package:expect/expect.dart'; |
| |
| class A |
| extends FutureOr<String> /*@compile-error=unspecified*/ |
| extends Object with FutureOr<bool> /*@compile-error=unspecified*/ |
| implements FutureOr<int> /*@compile-error=unspecified*/ |
| {} |
| |
| main() { |
| } |
