| // 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 We say that a type T is nullable if Null <: T and not T <: Object. |
| /// This is equivalent to the syntactic criterion that T is any of: |
| /// Null |
| /// S? for some S |
| /// S* for some S where S is nullable |
| /// FutureOr<S> for some S where S is nullable |
| /// dynamic |
| /// void |
| /// |
| /// @description Check that null can be assigned to nullable type. Test S* for |
| /// some S where S is nullable. Test pre-NNBD legacy classes |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-weak |
| import "legacy_lib.dart"; |
| |
| main() { |
| var a1 = getLegacyDynamic(null); |
| a1 = null; |
| |
| var a2 = getLegacyDynamic("Show must go on"); |
| a2 = null; |
| |
| var a3 = getLegacyNull(); |
| a3 = null; |
| } |