Language/Mixins/Mixin_Application/superinterfaces_t12.dart

// Copyright (c) 2016, 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 S be a class, M be a mixin with required superinterfaces
 * T1, . . . , Tn, combined superinterface MS, implemented interfaces
 * I1, . . . , Ik and members as mixin member declarations, and let N be a name.
 * It is a compile-time error to apply M to S if S does not implement, directly
 * or indirectly, all of T1, . . . , Tn.
 * @description Checks that it is no error if M directly implements all
 * its superinterfaces
 * @static-clean
 * @author sgrekhov@unipro.ru
 */
// SharedOptions=--enable-experiment=nonfunction-type-aliases
class A {
  int get a => 0;
}

abstract class B implements A {
  int get b;
}

typedef BAlias = B;

class M implements BAlias {
  int get a => -1;
  int get b => 1;
}

class S {
}

class C extends S with M {
}

main() {
  new C();
}