| // 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 A type T is assignable to a type S if T is dynamic, or if T is a |
| /// subtype of S. |
| /// |
| /// @description Checks that if type T is not dynamic and T is a subtype of S |
| /// then a type T is not assignable to a type S. Test type aliases |
| /// |
| /// @author sgrekhov@unipro.ru |
| |
| // SharedOptions=--enable-experiment=nonfunction-type-aliases |
| |
| class A {} |
| class B extends A {} |
| class C extends A {} |
| |
| typedef AAlias = A; |
| typedef BAlias = B; |
| typedef CAlias = C; |
| |
| main() { |
| BAlias b1 = new A(); |
| // ^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| BAlias b2 = new C(); |
| // ^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| BAlias? b3 = new A(); |
| // ^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| BAlias? b4 = new C(); |
| // ^^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
