| // 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. |
| |
| /** |
| * @assertion |
| * NORM(T*) = |
| * let S be NORM(T) |
| * if S is a top type then S |
| * if S is Null then Null |
| * if S is R? then R? |
| * if S is R* then R* |
| * else S* |
| * |
| * @description Checks that if NORM(T) is Null then NORM(T*) = Null |
| * |
| * @author sgrekhov@unipro.ru |
| */ |
| // Requirements=nnbd-weak |
| import 'opted_in_lib.dart'; |
| import 'opted_out_lib.dart'; |
| |
| class C extends LF<Null> implements A<Null> {} |
| |
| main() { |
| new C(); |
| } |
