3 * Copyright (C) 2009 Didier Villevalois, Maciej Piechotka
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 * Maciej Piechotka <uzytkownik2@gmail.com>
24 * A bi-directional iterator.
27 public interface Gee.BidirIterator<G> : Gee.Iterator<G> {
29 * Rewinds to the previous element in the iteration.
31 * @return ``true`` if the iterator has a previous element
33 public abstract bool previous ();
36 * Checks whether there is a previous element in the iteration.
38 * @return ``true`` if the iterator has a previous element
40 public abstract bool has_previous ();
43 * Rewinds to the first element in the iteration.
45 * @return ``true`` if the iterator has a first element
47 public abstract bool first ();
50 * Advances to the last element in the iteration.
52 * @return ``true`` if the iterator has a last element
54 public abstract bool last ();