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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of dart.core; | |
6 | |
7 /** | 5 /** |
8 * The [Iterator] class provides methods to iterate over an object. It | 6 * The [Iterator] class provides methods to iterate over an object. It |
9 * is transparently used by the for-in construct to test for the end | 7 * is transparently used by the for-in construct to test for the end |
10 * of the iteration, and to get the elements. | 8 * of the iteration, and to get the elements. |
11 * | 9 * |
12 * If the object iterated over is changed during the iteration, the | 10 * If the object iterated over is changed during the iteration, the |
13 * behavior is unspecified. | 11 * behavior is unspecified. |
14 */ | 12 */ |
15 abstract class Iterator<E> { | 13 abstract class Iterator<E> { |
16 /** | 14 /** |
17 * Gets the next element in the iteration. Throws a | 15 * Gets the next element in the iteration. Throws a |
18 * [StateError] if no element is left. | 16 * [StateError] if no element is left. |
19 */ | 17 */ |
20 E next(); | 18 E next(); |
21 | 19 |
22 /** | 20 /** |
23 * Returns whether the [Iterator] has elements left. | 21 * Returns whether the [Iterator] has elements left. |
24 */ | 22 */ |
25 bool get hasNext; | 23 bool get hasNext; |
26 } | 24 } |
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