| // 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. | |
| // @dart = 2.7 | |
| /*class: A:checkedInstance*/ | |
| class A {} | |
| /*class: B:*/ | |
| class B extends A {} | |
| /*class: C:checks=[$isA],instance*/ | |
| class C implements B {} // Implements A through `implements B`. | |
| @pragma('dart2js:noInline') | |
| test(o) => o is A; | |
| main() { | |
| test(new C()); | |
| test(null); | |
| } |