| // 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 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 |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-strong |
| class C {} |
| |
| main() { |
| C? c = C(); |
| c = null; |
| |
| int? i = null; |
| |
| String? s = ""; |
| s = null; |
| } |
