blob: cc1c7ef980ad3ac3f1b2723670eae257f4567ab8 [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 compile error if mixin is applied to the
/// class which doesn't implement required interface
/// @author
class A {
covariant num number = 0;
class B {
int number = 1;
mixin M on A {
test() {
super.number = 3;
class MA extends B with M {}
// ^
// [analyzer] unspecified
// [cfe] unspecified
main() {
new MA().test();