00001 // Types used in iterator implementation -*- C++ -*-
00002
00003 // Copyright (C) 2001, 2002 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library. This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
00014 // GNU General Public License for more details.
00015
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING. If not, write to the Free
00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00019 // USA.
00020
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction. Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License. This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029
00030 /*
00031 *
00032 * Copyright (c) 1994
00033 * Hewlett-Packard Company
00034 *
00035 * Permission to use, copy, modify, distribute and sell this software
00036 * and its documentation for any purpose is hereby granted without fee,
00037 * provided that the above copyright notice appear in all copies and
00038 * that both that copyright notice and this permission notice appear
00039 * in supporting documentation. Hewlett-Packard Company makes no
00040 * representations about the suitability of this software for any
00041 * purpose. It is provided "as is" without express or implied warranty.
00042 *
00043 *
00044 * Copyright (c) 1996-1998
00045 * Silicon Graphics Computer Systems, Inc.
00046 *
00047 * Permission to use, copy, modify, distribute and sell this software
00048 * and its documentation for any purpose is hereby granted without fee,
00049 * provided that the above copyright notice appear in all copies and
00050 * that both that copyright notice and this permission notice appear
00051 * in supporting documentation. Silicon Graphics makes no
00052 * representations about the suitability of this software for any
00053 * purpose. It is provided "as is" without express or implied warranty.
00054 */
00055
00064 #ifndef __GLIBCPP_INTERNAL_ITERATOR_BASE_TYPES_H
00065 #define __GLIBCPP_INTERNAL_ITERATOR_BASE_TYPES_H
00066
00067 #pragma GCC system_header
00068
00069 namespace std
00070 {
00079
00080 struct input_iterator_tag {};
00082 struct output_iterator_tag {};
00084 struct forward_iterator_tag : public input_iterator_tag {};
00086 struct bidirectional_iterator_tag : public forward_iterator_tag {};
00088 struct random_access_iterator_tag : public bidirectional_iterator_tag {};
00090
00091
00100 template<typename _Category, typename _Tp, typename _Distance = ptrdiff_t,
00101 typename _Pointer = _Tp*, typename _Reference = _Tp&>
00102 struct iterator {
00104 typedef _Category iterator_category;
00106 typedef _Tp value_type;
00108 typedef _Distance difference_type;
00110 typedef _Pointer pointer;
00112 typedef _Reference reference;
00113 };
00114
00121 template<typename _Iterator>
00122 struct iterator_traits {
00123 typedef typename _Iterator::iterator_category iterator_category;
00124 typedef typename _Iterator::value_type value_type;
00125 typedef typename _Iterator::difference_type difference_type;
00126 typedef typename _Iterator::pointer pointer;
00127 typedef typename _Iterator::reference reference;
00128 };
00129
00130 template<typename _Tp>
00131 struct iterator_traits<_Tp*> {
00132 typedef random_access_iterator_tag iterator_category;
00133 typedef _Tp value_type;
00134 typedef ptrdiff_t difference_type;
00135 typedef _Tp* pointer;
00136 typedef _Tp& reference;
00137 };
00138
00139 template<typename _Tp>
00140 struct iterator_traits<const _Tp*> {
00141 typedef random_access_iterator_tag iterator_category;
00142 typedef _Tp value_type;
00143 typedef ptrdiff_t difference_type;
00144 typedef const _Tp* pointer;
00145 typedef const _Tp& reference;
00146 };
00147
00154 template<typename _Iter>
00155 inline typename iterator_traits<_Iter>::iterator_category
00156 __iterator_category(const _Iter&)
00157 { return typename iterator_traits<_Iter>::iterator_category(); }
00158
00159 } // namespace std
00160
00161 #endif /* __GLIBCPP_INTERNAL_ITERATOR_BASE_TYPES_H */
00162
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