<!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 1.8.13"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libstdc++: numeric 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="navtreedata.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); </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 id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">libstdc++ </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.13 --> </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('a15229_source.html','');}); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">ext/numeric</div> </div> </div><!--header--> <div class="contents"> <a href="a15229.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> // Numeric extensions -*- C++ -*-</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> // Copyright (C) 2002-2015 Free Software Foundation, Inc.</div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> //</div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> // This file is part of the GNU ISO C++ Library. This library is free</div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> // software; you can redistribute it and/or modify it under the</div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> // terms of the GNU General Public License as published by the</div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> // Free Software Foundation; either version 3, or (at your option)</div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> // any later version.</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> // This library is distributed in the hope that it will be useful,</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> // but WITHOUT ANY WARRANTY; without even the implied warranty of</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> // GNU General Public License for more details.</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> // Under Section 7 of GPL version 3, you are granted additional</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> // permissions described in the GCC Runtime Library Exception, version</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> // 3.1, as published by the Free Software Foundation.</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> // You should have received a copy of the GNU General Public License and</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> // a copy of the GCC Runtime Library Exception along with this program;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> // <http://www.gnu.org/licenses/>.</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</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>  *</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  * Copyright (c) 1994</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  * Hewlett-Packard Company</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  *</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  * Permission to use, copy, modify, distribute and sell this software</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  * and its documentation for any purpose is hereby granted without fee,</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  * provided that the above copyright notice appear in all copies and</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  * that both that copyright notice and this permission notice appear</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  * in supporting documentation. Hewlett-Packard Company makes no</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  * representations about the suitability of this software for any</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  * purpose. It is provided "as is" without express or implied warranty.</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  *</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  *</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  * Copyright (c) 1996</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  * Silicon Graphics Computer Systems, Inc.</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  *</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  * Permission to use, copy, modify, distribute and sell this software</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  * and its documentation for any purpose is hereby granted without fee,</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  * provided that the above copyright notice appear in all copies and</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  * that both that copyright notice and this permission notice appear</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  * in supporting documentation. Silicon Graphics makes no</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  * representations about the suitability of this software for any</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  * purpose. It is provided "as is" without express or implied warranty.</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  */</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> /** @file ext/numeric</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  * This file is a GNU extension to the Standard C++ Library (possibly</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  * containing extensions from the HP/SGI STL subset). </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  */</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> #ifndef _EXT_NUMERIC</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> #define _EXT_NUMERIC 1</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> #pragma GCC system_header</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> #include <bits/concept_check.h></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> #include <numeric></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> #include <ext/functional> // For identity_element</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> {</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  // Returns __x ** __n, where __n >= 0. _Note that "multiplication"</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  // is required to be associative, but not necessarily commutative.</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  template<typename _Tp, typename _Integer, typename _MonoidOperation></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  _Tp</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  __power(_Tp __x, _Integer __n, _MonoidOperation __monoid_op)</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>  if (__n == 0)</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  return identity_element(__monoid_op);</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  else</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  {</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  while ((__n & 1) == 0)</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>  __n >>= 1;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  __x = __monoid_op(__x, __x);</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> </div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  _Tp __result = __x;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  __n >>= 1;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  while (__n != 0)</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  __x = __monoid_op(__x, __x);</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  if ((__n & 1) != 0)</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  __result = __monoid_op(__result, __x);</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  __n >>= 1;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  return __result;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</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> </div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  template<typename _Tp, typename _Integer></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  inline _Tp</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  __power(_Tp __x, _Integer __n)</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  { return __power(__x, __n, std::multiplies<_Tp>()); }</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  /**</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  * This is an SGI extension.</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  * @ingroup SGIextensions</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  * @doctodo</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  */</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  // Alias for the internal name __power. Note that power is an extension,</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  // not part of the C++ standard.</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  template<typename _Tp, typename _Integer, typename _MonoidOperation></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  inline _Tp</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  power(_Tp __x, _Integer __n, _MonoidOperation __monoid_op)</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  { return __power(__x, __n, __monoid_op); }</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>  /**</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  * This is an SGI extension.</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  * @ingroup SGIextensions</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  * @doctodo</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>  template<typename _Tp, typename _Integer></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  inline _Tp</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  power(_Tp __x, _Integer __n)</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  { return __power(__x, __n); }</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  using std::iota;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> #else</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>  * This is an SGI extension.</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  * @ingroup SGIextensions</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  * @doctodo</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  */</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  // iota is not part of the C++ standard. It is an extension.</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  template<typename _ForwardIter, typename _Tp></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  void</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  iota(_ForwardIter __first, _ForwardIter __last, _Tp __value)</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  {</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  // concept requirements</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  __glibcxx_function_requires(_Mutable_ForwardIteratorConcept<_ForwardIter>)</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  __glibcxx_function_requires(_ConvertibleConcept<_Tp,</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  typename std::iterator_traits<_ForwardIter>::value_type>)</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> </div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  while (__first != __last)</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  *__first++ = __value++;</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> #endif // C++11</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> } // namespace</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> #endif</div></div><!-- fragment --></div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="navelem"><a class="el" href="dir_3a83f109ff04170a1f8448445d1bdcba.html">include</a></li><li class="navelem"><a class="el" href="dir_d6815ee4ad7be618f033845800be3017.html">ext</a></li><li class="navelem"><a class="el" href="a15229.html">numeric</a></li> <li class="footer">Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.13 </li> </ul> </div> </body> </html>