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* 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.
* @assertion In a mixin declaration like
* mixin A<X extends S, Y extends T> on B, C implements D, E { body }
* the on clause declares the interfaces B and C as super-class constraints of
* the mixin. Having a super-class constaint allows the mixin declaration
* instance members to perform super-invocations (like if they are
* allowed by a class implementing both B and C. The mixin introduced by A can
* then only be applied to classes that implement both B and C.
* @description Checks that it is a compile error if mixin is applied to the
* class which doesn't implement required interface
* @compile-error
* @issue 35111
* @author
class S {}
class X extends S {}
class Y extends X {}
class A<T extends S> {
bar(T n) {}
class B<T extends S> extends A<S> {
bar(covariant T i) {}
mixin M<T extends S> on A<S> {
test(T t) {;
class MA extends B<Y> with M<X> {}
main() {
new MA().test(new Y());