blob: ea5c1486b6833b7f4760c6056e43e1ea7d592f49 [file] [log] [blame]
* Copyright (c) 2011, 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 The interface of class C is an implicit interface that declares
* instance members that correspond to the instance members declared by C, and
* whose direct superinterfaces are the direct superinterfaces of C. When a
* class name appears as type, that name denotes the interface of the class.
* @description Checks that a class can be used as an interface.
* @author msyabro
import "../../Utils/expect.dart";
abstract class A {}
class C {}
class B implements A {}
class D implements C {}
main() {
var b = new B();
Expect.isTrue(b is A);
var d = new D();
Expect.isTrue(d is C);