| // Copyright (c) 2011, 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 It is a compile error if a factory returns a non-null object whose |
| /// type is not a subtype of its actual return type. |
| /// @description Checks that returning an object of subtype of M |
| /// from factory constructor M does not produce an error. |
| /// @author kaigorodov |
| |
| |
| abstract class A { |
| A(); |
| factory A.f() => new C(); |
| } |
| |
| class C extends A {} |
| |
| main() { |
| new A.f(); |
| } |
