// 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 Further, the interfaces B and C must be compatible. The on clause
/// introduces a synthetic interface combining B and C, call it A$super, which is
/// equivalent to the interface of a class declaration of the form:
///   abstract class A$super<X extends S, Y extends T> implements B, C {}
/// It is a compile-time error for the mixin declaration if the class declaration
/// above would not be valid.
///
/// @description Checks that it is a compile-time error for the mixin declaration
/// if the interfaces B and C are not compatible.
/// @author sgrekhov@unipro.ru

class S {}
class T {}
class X extends S {}
class Y extends T {}

class I<T> {
}
abstract class J<T> {
}

class A<T> {
}
abstract class B<T> extends A<T> {
}
class C<T, S> extends B<T> implements J<S> {
}

mixin M1<X extends S, Y extends T> on A<X>, B<X> implements I<X>, J<X> {}
class MA1 extends C<X, Y> with M1<X, Y> {}
//    ^^^
// [analyzer] unspecified
// [cfe] unspecified

mixin M2<X extends S, Y extends T> on A<X>, B<Y> implements I<X>, J<Y> {}
//    ^^
// [analyzer] unspecified
// [cfe] unspecified
class MA2 extends C<X, Y> with M2<X, Y> {}
//                             ^^
// [analyzer] unspecified
// [cfe] unspecified

mixin M3<X extends S, Y extends T> on A<Y>, B<X> implements I<X>, J<Y> {}
//    ^^
// [analyzer] unspecified
// [cfe] unspecified
class MA3 extends C<X, Y> with M3<X, Y> {}
//                             ^^
// [analyzer] unspecified
// [cfe] unspecified

main() {
}