blob: daafba2de488353c53137bf645c3d56dc85c1102 [file] [log] [blame]
* Copyright (c) 2019, 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 A class S is a superclass of a class C iff either:
* - S is the superclass of C, or
* - S is a superclass of a class S0 and S0 is a superclass of C.
* @description Checks that the superclass-subclass relationship is transitive.
* Test type aliases
* @author
// SharedOptions=--enable-experiment=nonfunction-type-aliases
import "../../../Utils/expect.dart";
class A {}
typedef AAlias = A;
class B extends AAlias {}
typedef BAlias = B;
class C extends BAlias {}
typedef CAlias = C;
class D extends CAlias {}
main() {
D d = new D();
Expect.isTrue(d is C);
Expect.isTrue(d is B);
Expect.isTrue(d is A);