Language/Classes/Superinterfaces/implicit_interface_t02.dart

// 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 the implicit interface of a class
/// C includes an instance member m of type F and C declares or inherits a
/// corresponding instance member m of type F' if F' is not a subtype of F.
/// @description Checks that it is a compile error if the type F' of
/// inherited instance member m is not a subtype of F.
/// @compile-error
/// @author ilya


abstract class I {
  foo(var x);
}

class S {
  foo() {}
}

class C extends S implements I {}

main () {
  new C();
}