Language/Mixins/Mixin_Application/syntax_t20.dart

// Copyright (c) 2016, 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
 * classDefinition:
 *   metadata abstract? class mixinApplicationClass
 * ;
 * mixinClassApplication:
 *   identifer typeParameters? `=' mixinApplication `;'
 *
 * mixinApplication:
 *   type mixins interfaces?
 * ;
 *
 * A mixin application of the form S with M; defines a class C with superclass
 * S.
 * A mixin application of the form S with M1,...,Mk; defines a class C whose
 * superclass is the application of the mixin composition Mk−1∗...∗M1 to S.
 * In both cases above, C declares the same instance members as M (respectively,
 * Mk).
 * @description Test that mixin may have type parameters. Test that if there are
 * two members have the same name then it is a compile error
 * @issue 26409
 * @compile-error
 * @author sgrekhov@unipro.ru
 */

class A<T> {
  T? a;
}

class S<T> extends A<T> {
  T? a;
}

mixin M<T> on A<T> {
  T? a;
}

class C extends S<int> with M<String> {
}

main() {
  C c = new C();
}