| // 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 A for statement of the form for (finalConstVarOrType? id in e) s |
| /// is equivalent to the following code: |
| /// var n0 = e.iterator; |
| /// while (n0.moveNext()) { |
| /// finalConstVarOrType? id = n0.current; |
| /// s |
| /// } |
| /// where n0 is an identifier that does not occur anywhere in the program, except |
| /// that for purposes of static typechecking, it is checked under the assumption |
| /// that n0 is declared to be of type T, where T is the static type of e.iterator. |
| /// @description Checks that all of the mentioned methods are executed in the |
| /// specified order. |
| /// @author iefremov |
| |
| import '../../../../Utils/expect.dart'; |
| |
| var log = ""; |
| addLog(String s) { |
| log = '$log$s'; |
| } |
| |
| class TestIterator implements Iterator { |
| get current { |
| addLog("current"); |
| } |
| |
| bool moveNext() { |
| if (i < 2) { |
| addLog("moveNext()"); |
| i++; |
| return true; |
| } |
| addLog("moveNext()-exited"); |
| return false; |
| } |
| static int i = 0; |
| } |
| |
| class TestIterable extends Iterable { |
| Iterator get iterator { |
| addLog("iterator"); |
| return new TestIterator(); |
| } |
| } |
| |
| main() { |
| for ( var id in new TestIterable() ) { |
| addLog("addLog()"); |
| } |
| Expect.equals("iteratormoveNext()currentaddLog()moveNext()currentaddLog()moveNext()-exited", |
| log, "Wrong 'for statement' execution!"); |
| } |