| // 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:checkedInstance*/ |
| class A {} |
| |
| /*class: B:checks=[$isA],indirectInstance*/ |
| class B implements A {} |
| |
| /*class: C:checks=[],indirectInstance*/ |
| class C extends B {} // Implements A through `extends B`. |
| |
| /*class: D:checks=[],instance*/ |
| class D extends C {} // Implements A through `extends C`. |
| |
| @noInline |
| test(o) => o is A; |
| |
| main() { |
| test(new D()); |
| test(null); |
| } |
