// 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();
}