| // 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 An interface has a set of direct superinterfaces. |
| /// An interface J is a superinterface of an interface I iff either J is a |
| /// direct superinterface of I or J is a superinterface of a direct |
| /// superinterface of I. |
| /// @description Checks that it is a compile-time error if the chain of |
| /// superinterfaces forms a circular dependency. Test type aliases |
| /// @compile-error |
| /// @author sgrekhov@unipro.ru |
| |
| // SharedOptions=--enable-experiment=nonfunction-type-aliases |
| |
| abstract class C implements A {} |
| abstract class B implements C {} |
| |
| typedef BAlias = B; |
| |
| abstract class A implements BAlias {} |
| |
| class D implements A {} |
| |
| main() { |
| new D(); |
| } |
| |
