<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.3"/> <title>libstdc++: stl_iterator_base_funcs.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); $(window).load(resizeHeight); </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">libstdc++ </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.3 --> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> $(document).ready(function(){initNavTree('a01498_source.html','');}); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">stl_iterator_base_funcs.h</div> </div> </div><!--header--> <div class="contents"> <a href="a01498.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Functions used by iterators -*- C++ -*-</span></div> <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div> <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010</span></div> <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Free Software Foundation, Inc.</span></div> <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div> <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span></div> <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// software; you can redistribute it and/or modify it under the</span></div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// terms of the GNU General Public License as published by the</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// any later version.</span></div> <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div> <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// This library is distributed in the hope that it will be useful,</span></div> <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div> <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div> <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">// GNU General Public License for more details.</span></div> <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div> <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div> <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div> <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">/*</span></div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> *</span></div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * Copyright (c) 1994</span></div> <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * Hewlett-Packard Company</span></div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> *</span></div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * Permission to use, copy, modify, distribute and sell this software</span></div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * and its documentation for any purpose is hereby granted without fee,</span></div> <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * provided that the above copyright notice appear in all copies and</span></div> <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * that both that copyright notice and this permission notice appear</span></div> <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * in supporting documentation. Hewlett-Packard Company makes no</span></div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * representations about the suitability of this software for any</span></div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * purpose. It is provided "as is" without express or implied warranty.</span></div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> *</span></div> <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> *</span></div> <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * Copyright (c) 1996-1998</span></div> <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * Silicon Graphics Computer Systems, Inc.</span></div> <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> *</span></div> <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * Permission to use, copy, modify, distribute and sell this software</span></div> <div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * and its documentation for any purpose is hereby granted without fee,</span></div> <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * provided that the above copyright notice appear in all copies and</span></div> <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * that both that copyright notice and this permission notice appear</span></div> <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * in supporting documentation. Silicon Graphics makes no</span></div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * representations about the suitability of this software for any</span></div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * purpose. It is provided "as is" without express or implied warranty.</span></div> <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> */</span></div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"></span></div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">/** @file bits/stl_iterator_base_funcs.h</span></div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * This is an internal header file, included by other library headers.</span></div> <div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * Do not attempt to use it directly. @headername{iterator}</span></div> <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> *</span></div> <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * This file contains all of the general iterator-related utility</span></div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * functions, such as distance() and advance().</span></div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> */</span></div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#ifndef _STL_ITERATOR_BASE_FUNCS_H</span></div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"></span><span class="preprocessor">#define _STL_ITERATOR_BASE_FUNCS_H 1</span></div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#pragma GCC system_header</span></div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#include <<a class="code" href="a01052.html">bits/concept_check.h</a>></span></div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div> <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="keyword">namespace </span>std _GLIBCXX_VISIBILITY(default)</div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> {</div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _InputIterator></div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">inline</span> <span class="keyword">typename</span> iterator_traits<_InputIterator>::difference_type</div> <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  __distance(_InputIterator __first, _InputIterator __last,</div> <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  input_iterator_tag)</div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  {</div> <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="comment">// concept requirements</span></div> <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  __glibcxx_function_requires(_InputIteratorConcept<_InputIterator>)</div> <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  typename iterator_traits<_InputIterator>::difference_type __n = 0;</div> <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  while (__first != __last)</div> <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  {</div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  ++__first;</div> <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  ++__n;</div> <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  }</div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">return</span> __n;</div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  }</div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _RandomAccessIterator></div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keyword">inline</span> <span class="keyword">typename</span> iterator_traits<_RandomAccessIterator>::difference_type</div> <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  __distance(_RandomAccessIterator __first, _RandomAccessIterator __last,</div> <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  random_access_iterator_tag)</div> <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  {</div> <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// concept requirements</span></div> <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  __glibcxx_function_requires(_RandomAccessIteratorConcept<</div> <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  _RandomAccessIterator>)</div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  return __last - __first;</div> <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  }</div> <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"></span></div> <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> /**</span></div> <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * @brief A generalization of pointer arithmetic.</span></div> <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * @param __first An input iterator.</span></div> <div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> * @param __last An input iterator.</span></div> <div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> * @return The distance between them.</span></div> <div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> *</span></div> <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> * Returns @c n such that __first + n == __last. This requires</span></div> <div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> * that @p __last must be reachable from @p __first. Note that @c</span></div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * n may be negative.</span></div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> *</span></div> <div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> * For random access iterators, this uses their @c + and @c - operations</span></div> <div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * and are constant time. For other %iterator classes they are linear time.</span></div> <div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> */</span></div> <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  template<typename _InputIterator></div> <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  inline typename iterator_traits<_InputIterator>::difference_type</div> <div class="line"><a name="l00114"></a><span class="lineno"><a class="code" href="a01604.html#a5852ded2c7147a161b33951ef37ecba8"> 114</a></span>  <a class="code" href="a01604.html#a5852ded2c7147a161b33951ef37ecba8" title="A generalization of pointer arithmetic.">distance</a>(_InputIterator __first, _InputIterator __last)</div> <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  {</div> <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="comment">// concept requirements -- taken care of in __distance</span></div> <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordflow">return</span> std::__distance(__first, __last,</div> <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="code" href="a01665.html#ga304181cfe40c7dc4e4f1bcccdae99f8d">std::__iterator_category</a>(__first));</div> <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  }</div> <div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div> <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _InputIterator, <span class="keyword">typename</span> _Distance></div> <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div> <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  __advance(_InputIterator& __i, _Distance __n, input_iterator_tag)</div> <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  {</div> <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="comment">// concept requirements</span></div> <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  __glibcxx_function_requires(_InputIteratorConcept<_InputIterator>)</div> <div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  while (__n--)</div> <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  ++__i;</div> <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div> <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div> <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  template<typename _BidirectionalIterator, typename _Distance></div> <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  inline <span class="keywordtype">void</span></div> <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  __advance(_BidirectionalIterator& __i, _Distance __n,</div> <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  bidirectional_iterator_tag)</div> <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  {</div> <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="comment">// concept requirements</span></div> <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  __glibcxx_function_requires(_BidirectionalIteratorConcept<</div> <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  _BidirectionalIterator>)</div> <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  if (__n > 0)</div> <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  while (__n--)</div> <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  ++__i;</div> <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  else</div> <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  while (__n++)</div> <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  --__i;</div> <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  }</div> <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div> <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  template<typename _RandomAccessIterator, typename _Distance></div> <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  inline <span class="keywordtype">void</span></div> <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  __advance(_RandomAccessIterator& __i, _Distance __n,</div> <div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  random_access_iterator_tag)</div> <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  {</div> <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="comment">// concept requirements</span></div> <div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  __glibcxx_function_requires(_RandomAccessIteratorConcept<</div> <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  _RandomAccessIterator>)</div> <div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  __i += __n;</div> <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div> <div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"></span></div> <div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> /**</span></div> <div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> * @brief A generalization of pointer arithmetic.</span></div> <div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment"> * @param __i An input iterator.</span></div> <div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> * @param __n The @a delta by which to change @p __i.</span></div> <div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"> * @return Nothing.</span></div> <div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment"> *</span></div> <div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"> * This increments @p i by @p n. For bidirectional and random access</span></div> <div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"> * iterators, @p __n may be negative, in which case @p __i is decremented.</span></div> <div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> *</span></div> <div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"> * For random access iterators, this uses their @c + and @c - operations</span></div> <div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> * and are constant time. For other %iterator classes they are linear time.</span></div> <div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"> */</span></div> <div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  template<typename _InputIterator, typename _Distance></div> <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  inline <span class="keywordtype">void</span></div> <div class="line"><a name="l00172"></a><span class="lineno"><a class="code" href="a01604.html#a2d43d8e656c1d71e14e398cdd726af37"> 172</a></span>  <a class="code" href="a01604.html#a2d43d8e656c1d71e14e398cdd726af37" title="A generalization of pointer arithmetic.">advance</a>(_InputIterator& __i, _Distance __n)</div> <div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  {</div> <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="comment">// concept requirements -- taken care of in __advance</span></div> <div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keyword">typename</span> iterator_traits<_InputIterator>::difference_type __d = __n;</div> <div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  std::__advance(__i, __d, <a class="code" href="a01665.html#ga304181cfe40c7dc4e4f1bcccdae99f8d">std::__iterator_category</a>(__i));</div> <div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div> <div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div> <div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="preprocessor">#ifdef __GXX_EXPERIMENTAL_CXX0X__</span></div> <div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _ForwardIterator></div> <div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keyword">inline</span> _ForwardIterator</div> <div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  next(_ForwardIterator __x, <span class="keyword">typename</span></div> <div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  iterator_traits<_ForwardIterator>::difference_type __n = 1)</div> <div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  {</div> <div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <a class="code" href="a01604.html#a2d43d8e656c1d71e14e398cdd726af37" title="A generalization of pointer arithmetic.">std::advance</a>(__x, __n);</div> <div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">return</span> __x;</div> <div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  }</div> <div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div> <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _B<span class="keywordtype">id</span>irectionalIterator></div> <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keyword">inline</span> _BidirectionalIterator</div> <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  prev(_BidirectionalIterator __x, <span class="keyword">typename</span></div> <div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  iterator_traits<_BidirectionalIterator>::difference_type __n = 1) </div> <div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  {</div> <div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <a class="code" href="a01604.html#a2d43d8e656c1d71e14e398cdd726af37" title="A generalization of pointer arithmetic.">std::advance</a>(__x, -__n);</div> <div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordflow">return</span> __x;</div> <div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  }</div> <div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div> <div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="preprocessor">#endif // __GXX_EXPERIMENTAL_CXX0X__</span></div> <div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00201"></a><span class="lineno"> 201</span> _GLIBCXX_END_NAMESPACE_VERSION</div> <div class="line"><a name="l00202"></a><span class="lineno"> 202</span> } <span class="comment">// namespace</span></div> <div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div> <div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="preprocessor">#endif </span><span class="comment">/* _STL_ITERATOR_BASE_FUNCS_H */</span><span 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