| // 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. |
| |
| /// @assertion The type system is extended with a notion of a legacy type |
| /// operator. For every type T, there is an additional type T* which is the |
| /// legacy version of the type. There is no surface syntax for legacy types, and |
| /// implementations should display the legacy type T* in the same way that they |
| /// would display the type T, except in so far as it is useful to communicate to |
| /// programmers for the purposes of error messages that the type originates in |
| /// unmigrated code. |
| /// |
| /// @description Check that all fields of legacy type T* are nullable. Test mixin |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-weak |
| import "legacy_lib.dart"; |
| |
| class B extends A with Mx {} |
| |
| main() { |
| B b = new B(); |
| b.iMx = null; |
| } |