Language/Mixins/Mixin_Application/syntax_t22.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
/// classDefinition:
///   metadata abstract? class mixinApplicationClass
/// ;
/// mixinApplicationClass:
///   identifier typeParameters? `=' mixinApplication `;'
///
/// mixinApplication:
///   type mixins interfaces?
/// ;
///
/// A mixin application of the form S with M; defines a class C with superclass
/// S.
/// A mixin application of the form S with M1,...,Mk; defines a class C whose
/// superclass is the application of the mixin composition Mk−1∗...∗M1 to S.
/// In both cases above, C declares the same instance members as M (respectively,
/// Mk).
/// @description Checks that it is no compile error to declare mixin on a class
/// which has a superclass other than Object.
/// @issue 26409
/// @author sgrekhov@unipro.ru

import '../../../Utils/expect.dart';

class A {
  String a() => "A";
}

class S extends A {
}

mixin M on A {
  String m() {
    return super.a();
  }
}

class C = S with M;

main() {
  C c = new C();
  Expect.equals("A", c.m());
}