| // 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 Let C be a concrete class that does not declare its own |
| /// noSuchMethod(). |
| /// It is a compile error if the implicit interface of C includes an instance |
| /// member m of type F and C does not declare or inherit a corresponding |
| /// instance member m of type F' such that F' <: F. |
| /// |
| /// @description Checks that there are no errors if the type F' of inherited |
| /// instance member m is in fact a subtype of F. |
| /// @author ilya |
| |
| abstract class I { |
| foo(int x); |
| } |
| |
| class S { |
| foo(num x) {} |
| } |
| |
| class C extends S implements I {} |
| |
| main () { |
| new C(); |
| } |
