// Copyright (c) 2018, 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.

// @dart = 2.9

/// @assertion A mixin declaration syntax separate from class declarations:
/// mixinDeclaration :
///   metadata? 'mixin' identifier typeParameters? ('on' types)?
///     ('implements' types)? '{' mixinMember* '}'
///
/// @description Checks that mixin declaration above is correct.
/// @author ngl@unipro.ru


class I {}
class J {}

class B {}
class C {}

mixin M on B, C implements I, J {}

class A implements B, C, I, J {}

class MA extends A with M {}

main() {
  new MA();
}