| // Copyright (c) 2017, 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. |
| |
| import "package:expect/expect.dart"; |
| |
| class A {} |
| |
| class B extends A {} |
| |
| A a1 = new B(); |
| A a2 = new A(); |
| B b1 = a1; |
| B b2 = a2; |
| |
| class C { |
| static B b3 = a1; |
| static B b4 = a2; |
| B b5 = a1; |
| } |
| |
| class D { |
| B b6 = a2; |
| } |
| |
| void main() { |
| b1; // No error |
| Expect.throwsTypeError(() { |
| b2; |
| }); |
| C.b3; // No error |
| Expect.throwsTypeError(() { |
| C.b4; |
| }); |
| new C(); // No error |
| Expect.throwsTypeError(() { |
| new D(); |
| }); |
| } |