blob: dd1e570eb1bd210ea5b1f44467bd3436cd60889e [file] [log] [blame]
// 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 runtime error if mixin is applied to the
/// class which doesn't implement required interface by covariant. See
/// @issue 35111
/// @author
import "../../Utils/expect.dart";
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() {
Expect.throws(() {
new MA().test(new Y());