| // Copyright (c) 2019, 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. |
| |
| // SharedOptions=--enable-experiment=non-nullable |
| |
| // Test that it is an error for a class to extend, implement, or mixin the type |
| // Never. |
| class A extends Never {} //# 01: compile-time error |
| |
| class A implements Never {} //# 02: compile-time error |
| |
| class A with Never {} //# 03: compile-time error |
| |
| mixin M on Never {} //# 04: compile-time error |
| |
| main() {} |
