// 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.

import 'package:meta/dart2js.dart';

class A {}

/*class: B:checks=[$isA]*/
class B implements A {}

/*class: C:checks=[]*/
class C extends B {} // Implements A through `extends B`.

@noInline
test(o) => o is A;

main() {
  test(new C());
  test(new B());
  test(null);
}