| // Copyright (c) 2016, 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 If f is marked sync*, then a fresh instance i implementing |
| /// the built-in class Iterable is associated with the invocation and |
| /// immediately returned. |
| /// A Dart implementation will need to provide a specific implementation of |
| /// Iterable that will be returned by sync* methods. A typical strategy would |
| /// be to produce an instance of a subclass of class IterableBase defined in |
| /// dart:core. The only method that needs to be added by the Dart |
| /// implementation in that case is iterator. |
| /// |
| /// @description Check that a fresh instance of Iterable is returned to the |
| /// caller of sync generator. |
| /// |
| /// @author a.semenov@unipro.ru |
| |
| |
| import '../../../Utils/expect.dart'; |
| |
| Iterable test() sync* { |
| yield 1; |
| } |
| |
| main() { |
| Set history = new Set.identity(); |
| for (var i = 0; i < 10; i++) { |
| Iterable s = test(); |
| Expect.isFalse(history.contains(s)); |
| history.add(s); |
| } |
| } |