<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://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 1.8.15"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libstdc++: utility 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"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(initResizable); /* @license-end */</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 1.8.15 --> </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"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(function(){initNavTree('a00176_source.html','');}); /* @license-end */ </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">utility</div> </div> </div><!--header--> <div class="contents"> <a href="a00176.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> // <utility> -*- 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) 2001-2018 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) 1996,1997</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 include/utility</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  * This is a Standard C++ Library header.</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  */</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> #ifndef _GLIBCXX_UTILITY</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> #define _GLIBCXX_UTILITY 1</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> #pragma GCC system_header</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> /**</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  * @defgroup utilities Utilities</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  *</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  * Components deemed generally useful. Includes pair, tuple,</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  * forward/move helpers, ratio, function object, metaprogramming and</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  * type traits, time, date, and memory functions.</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> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> #include <bits/c++config.h></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> #include <bits/stl_relops.h></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> #include <bits/stl_pair.h></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> #if __cplusplus >= 201103L</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> #include <type_traits></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> #include <bits/move.h></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> #include <initializer_list></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> namespace std _GLIBCXX_VISIBILITY(default)</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> _GLIBCXX_BEGIN_NAMESPACE_VERSION</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>  /// Finds the size of a given tuple type.</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  template<typename _Tp></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  struct tuple_size;</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>  // _GLIBCXX_RESOLVE_LIB_DEFECTS</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  // 2313. tuple_size should always derive from integral_constant<size_t, N></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  // 2770. tuple_size<const T> specialization is not SFINAE compatible</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>  template<typename _Tp,</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  typename _Up = typename remove_cv<_Tp>::type,</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  typename = typename enable_if<is_same<_Tp, _Up>::value>::type,</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  size_t = tuple_size<_Tp>::value></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  using __enable_if_has_tuple_size = _Tp;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  template<typename _Tp></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  struct tuple_size<const __enable_if_has_tuple_size<_Tp>></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  : public tuple_size<_Tp> { };</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  template<typename _Tp></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  struct tuple_size<volatile __enable_if_has_tuple_size<_Tp>></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  : public tuple_size<_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>  template<typename _Tp></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  struct tuple_size<const volatile __enable_if_has_tuple_size<_Tp>></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  : public tuple_size<_Tp> { };</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  /// Gives the type of the ith element of a given tuple type.</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  template<std::size_t __i, typename _Tp></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  struct tuple_element;</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  // Duplicate of C++14's tuple_element_t for internal use in C++11 mode</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  template<std::size_t __i, typename _Tp></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  using __tuple_element_t = typename tuple_element<__i, _Tp>::type;</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>  template<std::size_t __i, typename _Tp></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  struct tuple_element<__i, const _Tp></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  {</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  typedef typename add_const<__tuple_element_t<__i, _Tp>>::type type;</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> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  template<std::size_t __i, typename _Tp></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  struct tuple_element<__i, volatile _Tp></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>  typedef typename add_volatile<__tuple_element_t<__i, _Tp>>::type type;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  };</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  template<std::size_t __i, typename _Tp></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  struct tuple_element<__i, const volatile _Tp></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>  typedef typename add_cv<__tuple_element_t<__i, _Tp>>::type type;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  };</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> #if __cplusplus > 201103L</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> #define __cpp_lib_tuple_element_t 201402</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  template<std::size_t __i, typename _Tp></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  using tuple_element_t = typename tuple_element<__i, _Tp>::type;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> #endif</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  // Various functions which give std::pair a tuple-like interface.</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  /// Partial specialization for std::pair</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  template<typename _T1, typename _T2></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  struct __is_tuple_like_impl<std::pair<_T1, _T2>> : true_type</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> </div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  /// Partial specialization for std::pair</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  template<class _Tp1, class _Tp2></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  struct tuple_size<std::pair<_Tp1, _Tp2>></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  : public integral_constant<std::size_t, 2> { };</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  /// Partial specialization for std::pair</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  template<class _Tp1, class _Tp2></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  struct tuple_element<0, std::pair<_Tp1, _Tp2>></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  { typedef _Tp1 type; };</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  /// Partial specialization for std::pair</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  template<class _Tp1, class _Tp2></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  struct tuple_element<1, std::pair<_Tp1, _Tp2>></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  { typedef _Tp2 type; };</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  template<std::size_t _Int></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  struct __pair_get;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> </div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  template<></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  struct __pair_get<0></div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  {</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  template<typename _Tp1, typename _Tp2></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  static constexpr _Tp1&</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  __get(std::pair<_Tp1, _Tp2>& __pair) noexcept</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  { return __pair.first; }</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>  template<typename _Tp1, typename _Tp2></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  static constexpr _Tp1&&</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  __move_get(std::pair<_Tp1, _Tp2>&& __pair) noexcept</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  { return std::forward<_Tp1>(__pair.first); }</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>  template<typename _Tp1, typename _Tp2></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  static constexpr const _Tp1&</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  __const_get(const std::pair<_Tp1, _Tp2>& __pair) noexcept</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  { return __pair.first; }</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> </div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  template<typename _Tp1, typename _Tp2></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  static constexpr const _Tp1&&</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  __const_move_get(const std::pair<_Tp1, _Tp2>&& __pair) noexcept</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  { return std::forward<const _Tp1>(__pair.first); }</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>  template<></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  struct __pair_get<1></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  {</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  template<typename _Tp1, typename _Tp2></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  static constexpr _Tp2&</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  __get(std::pair<_Tp1, _Tp2>& __pair) noexcept</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  { return __pair.second; }</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>  template<typename _Tp1, typename _Tp2></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  static constexpr _Tp2&&</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  __move_get(std::pair<_Tp1, _Tp2>&& __pair) noexcept</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  { return std::forward<_Tp2>(__pair.second); }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  template<typename _Tp1, typename _Tp2></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  static constexpr const _Tp2&</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  __const_get(const std::pair<_Tp1, _Tp2>& __pair) noexcept</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  { return __pair.second; }</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  template<typename _Tp1, typename _Tp2></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  static constexpr const _Tp2&&</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  __const_move_get(const std::pair<_Tp1, _Tp2>&& __pair) noexcept</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  { return std::forward<const _Tp2>(__pair.second); }</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  };</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  template<std::size_t _Int, class _Tp1, class _Tp2></div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  constexpr typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type&</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  get(std::pair<_Tp1, _Tp2>& __in) noexcept</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  { return __pair_get<_Int>::__get(__in); }</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  template<std::size_t _Int, class _Tp1, class _Tp2></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  constexpr typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type&&</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  get(std::pair<_Tp1, _Tp2>&& __in) noexcept</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  { return __pair_get<_Int>::__move_get(std::move(__in)); }</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  template<std::size_t _Int, class _Tp1, class _Tp2></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  constexpr const typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type&</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  get(const std::pair<_Tp1, _Tp2>& __in) noexcept</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  { return __pair_get<_Int>::__const_get(__in); }</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  template<std::size_t _Int, class _Tp1, class _Tp2></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  constexpr const typename tuple_element<_Int, std::pair<_Tp1, _Tp2>>::type&&</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  get(const std::pair<_Tp1, _Tp2>&& __in) noexcept</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  { return __pair_get<_Int>::__const_move_get(std::move(__in)); }</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> </div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> #if __cplusplus > 201103L</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> #define __cpp_lib_tuples_by_type 201304</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  constexpr _Tp&</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  get(pair<_Tp, _Up>& __p) noexcept</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  { return __p.first; }</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> </div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  constexpr const _Tp&</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  get(const pair<_Tp, _Up>& __p) noexcept</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  { return __p.first; }</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  constexpr _Tp&&</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  get(pair<_Tp, _Up>&& __p) noexcept</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  { return std::move(__p.first); }</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  constexpr const _Tp&&</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  get(const pair<_Tp, _Up>&& __p) noexcept</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  { return std::move(__p.first); }</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> </div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  constexpr _Tp&</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  get(pair<_Up, _Tp>& __p) noexcept</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  { return __p.second; }</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  constexpr const _Tp&</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  get(const pair<_Up, _Tp>& __p) noexcept</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  { return __p.second; }</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  constexpr _Tp&&</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  get(pair<_Up, _Tp>&& __p) noexcept</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  { return std::move(__p.second); }</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> </div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  constexpr const _Tp&&</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  get(const pair<_Up, _Tp>&& __p) noexcept</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  { return std::move(__p.second); }</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> #define __cpp_lib_exchange_function 201304</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> </div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  /// Assign @p __new_val to @p __obj and return its previous value.</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  template <typename _Tp, typename _Up = _Tp></div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  inline _Tp</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  exchange(_Tp& __obj, _Up&& __new_val)</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  { return std::__exchange(__obj, std::forward<_Up>(__new_val)); }</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> #endif</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> </div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  // Stores a tuple of indices. Used by tuple and pair, and by bind() to</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  // extract the elements in a tuple.</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  template<size_t... _Indexes> struct _Index_tuple { };</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> </div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> #ifdef __has_builtin</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span> # if __has_builtin(__make_integer_seq)</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> # define _GLIBCXX_USE_MAKE_INTEGER_SEQ 1</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> # endif</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> #endif</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span> </div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  // Builds an _Index_tuple<0, 1, 2, ..., _Num-1>.</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  template<size_t _Num></div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  struct _Build_index_tuple</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  {</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> #if _GLIBCXX_USE_MAKE_INTEGER_SEQ</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  template<typename, size_t... _Indices></div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  using _IdxTuple = _Index_tuple<_Indices...>;</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> </div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  using __type = __make_integer_seq<_IdxTuple, size_t, _Num>;</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span> #else</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  using __type = _Index_tuple<__integer_pack(_Num)...>;</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span> #endif</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  };</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> </div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span> #if __cplusplus > 201103L</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span> </div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span> #define __cpp_lib_integer_sequence 201304</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span> </div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  /// Class template integer_sequence</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  template<typename _Tp, _Tp... _Idx></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  struct integer_sequence</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  {</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  typedef _Tp value_type;</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  static constexpr size_t size() noexcept { return sizeof...(_Idx); }</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  };</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> </div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  /// Alias template make_integer_sequence</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  template<typename _Tp, _Tp _Num></div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  using make_integer_sequence</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span> #if _GLIBCXX_USE_MAKE_INTEGER_SEQ</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  = __make_integer_seq<integer_sequence, _Tp, _Num>;</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span> #else</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  = integer_sequence<_Tp, __integer_pack(_Num)...>;</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span> #endif</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span> </div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span> #undef _GLIBCXX_USE_MAKE_INTEGER_SEQ</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  /// Alias template index_sequence</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  template<size_t... _Idx></div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  using index_sequence = integer_sequence<size_t, _Idx...>;</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span> </div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  /// Alias template make_index_sequence</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  template<size_t _Num></div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  using make_index_sequence = make_integer_sequence<size_t, _Num>;</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> </div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  /// Alias template index_sequence_for</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  template<typename... _Types></div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  using index_sequence_for = make_index_sequence<sizeof...(_Types)>;</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span> #endif</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span> </div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span> #if __cplusplus > 201402L</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> </div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  struct in_place_t {</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  explicit in_place_t() = default;</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  };</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> </div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  inline constexpr in_place_t in_place{};</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span> </div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  template<typename _Tp> struct in_place_type_t</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  {</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  explicit in_place_type_t() = default;</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  };</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  template<typename _Tp></div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  inline constexpr in_place_type_t<_Tp> in_place_type{};</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span> </div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  template<size_t _Idx> struct in_place_index_t</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  {</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  explicit in_place_index_t() = default;</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  };</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span> </div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  template<size_t _Idx></div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  inline constexpr in_place_index_t<_Idx> in_place_index{};</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span> </div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  template<typename></div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  struct __is_in_place_type_impl : false_type</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  { };</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span> </div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  template<typename _Tp></div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  struct __is_in_place_type_impl<in_place_type_t<_Tp>> : true_type</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  { };</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span> </div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  template<typename _Tp></div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  struct __is_in_place_type</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  : public __is_in_place_type_impl<_Tp></div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  { };</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span> #define __cpp_lib_as_const 201510</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  template<typename _Tp></div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  constexpr add_const_t<_Tp>& as_const(_Tp& __t) noexcept { return __t; }</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> </div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  template<typename _Tp></div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  void as_const(const _Tp&&) = delete;</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span> </div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> #endif // C++17</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span> </div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span> } // namespace</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span> </div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span> #endif</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span> </div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> #endif /* _GLIBCXX_UTILITY */</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_47f59b4ef76325ed55a7fd4bed4be05b.html">include</a></li><li class="navelem"><a class="el" href="a00176.html">utility</a></li> <li class="footer">Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.15 </li> </ul> </div> </body> </html>