| // 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 Unless explicitly stated otherwise, all ordinary rules that apply |
| /// to methods apply to abstract methods. |
| /// It is a compile error if an instance method m1 overrides an instance member |
| /// m2 and m1 does not declare all the named parameters declared by m2. |
| /// @description Checks that no compile error is produced when the overriding |
| /// abstract method has the same set of named parameters as the non-abstract |
| /// instance method being overriden, but in a different order. |
| /// @author rodionov |
| |
| import "../../../Utils/expect.dart"; |
| |
| class A { |
| f({var x, var y}) { return x+y; } |
| } |
| |
| abstract class C extends A { |
| f({var y, var x}); |
| } |
| |
| class D extends C { |
| f({var x, var y}) { return x-y; } |
| } |
| |
| main() { |
| A a = new A(); |
| Expect.equals(3, a.f(x:2, y:1)); |
| a = new D(); |
| Expect.equals(1, a.f(x:2, y:1)); |
| } |