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<a href="a00572.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">// Pair implementation -*- 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) 2001-2018 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</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="l00006"></a><span class="lineno"> 6</span> <span class="comment">// software; you can redistribute it and/or modify it under the</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// terms of the GNU General Public License as published by the</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// any later version.</span></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> <span class="comment">// This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// GNU General Public License for more details.</span></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> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></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> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></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> <span class="comment">/*</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"> * Copyright (c) 1994</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * Hewlett-Packard Company</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> *</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * Permission to use, copy, modify, distribute and sell this software</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * and its documentation for any purpose is hereby granted without fee,</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * provided that the above copyright notice appear in all copies and</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * that both that copyright notice and this permission notice appear</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * in supporting documentation. Hewlett-Packard Company makes no</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * representations about the suitability of this software for any</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * purpose. It is provided "as is" without express or implied warranty.</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> *</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"> * Copyright (c) 1996,1997</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * Silicon Graphics Computer Systems, Inc.</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> *</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * Permission to use, copy, modify, distribute and sell this software</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * and its documentation for any purpose is hereby granted without fee,</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * provided that the above copyright notice appear in all copies and</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * that both that copyright notice and this permission notice appear</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * in supporting documentation. Silicon Graphics makes no</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * representations about the suitability of this software for any</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * purpose. It is provided "as is" without express or implied warranty.</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> */</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">/** @file bits/stl_pair.h</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * This is an internal header file, included by other library headers.</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * Do not attempt to use it directly. @headername{utility}</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> */</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> <span class="preprocessor">#ifndef _STL_PAIR_H</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#define _STL_PAIR_H 1</span></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> <span class="preprocessor">#include <<a class="code" href="a00422.html">bits/move.h</a>></span> <span class="comment">// for std::move / std::forward, and std::swap</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> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#include <<a class="code" href="a00167.html">type_traits</a>></span> <span class="comment">// for std::__decay_and_strip too</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="keyword">namespace </span><a class="code" href="a01541.html">std</a> _GLIBCXX_VISIBILITY(default)</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> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"></span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> /**</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * @addtogroup utilities</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * @{</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> */</span></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> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> /// piecewise_construct_t</span></div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="a07747.html"> 76</a></span> <span class="comment"></span> <span class="keyword">struct </span><a class="code" href="a07747.html">piecewise_construct_t</a> { <span class="keyword">explicit</span> <a class="code" href="a07747.html">piecewise_construct_t</a>() = <span class="keywordflow">default</span>; };</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"></span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> /// piecewise_construct</span></div><div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="a01480.html#ga4be4b722e942cd646f19614bcff7a328"> 79</a></span> <span class="comment"></span> _GLIBCXX17_INLINE constexpr <a class="code" href="a07747.html">piecewise_construct_t</a> <a class="code" href="a01480.html#ga4be4b722e942cd646f19614bcff7a328">piecewise_construct</a> =</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="code" href="a07747.html">piecewise_construct_t</a>();</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>  <span class="comment">// Forward declarations.</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">template</span><<span class="keyword">typename</span>...></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">class </span><a class="code" href="a02883.html">tuple</a>;</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>  <span class="keyword">template</span><std::size_t...></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">struct </span>_Index_tuple;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="comment">// Concept utility functions, reused in conditionally-explicit</span></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="comment">// constructors.</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// See PR 70437, don't look at is_constructible or</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// is_convertible if the types are the same to</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// avoid querying those properties for incomplete types.</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">template</span> <<span class="keywordtype">bool</span>, <span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">struct </span>_PCC</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>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _ConstructiblePair()</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>  <span class="keywordflow">return</span> __and_<is_constructible<_T1, const _U1&>,</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="code" href="a03575.html">is_constructible<_T2, const _U2&></a>>::value;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  }</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>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _ImplicitlyConvertiblePair()</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">return</span> __and_<is_convertible<const _U1&, _T1>,</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  is_convertible<const _U2&, _T2>>::value;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  }</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _MoveConstructiblePair()</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  {</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">return</span> __and_<is_constructible<_T1, _U1&&>,</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  is_constructible<_T2, _U2&&>>::value;</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> </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _ImplicitlyMoveConvertiblePair()</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="keywordflow">return</span> __and_<is_convertible<_U1&&, _T1>,</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  is_convertible<_U2&&, _T2>>::value;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  }</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="keyword">template</span> <<span class="keywordtype">bool</span> __implicit, <span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _CopyMovePair()</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>  <span class="keyword">using</span> __do_converts = __and_<is_convertible<const _U1&, _T1>,</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  is_convertible<_U2&&, _T2>>;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keyword">using</span> __converts = <span class="keyword">typename</span> conditional<__implicit,</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  __do_converts,</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  __not_<__do_converts>>::type;</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">return</span> __and_<is_constructible<_T1, const _U1&>,</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  is_constructible<_T2, _U2&&>,</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  __converts</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  >::value;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</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>  <span class="keyword">template</span> <<span class="keywordtype">bool</span> __implicit, <span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _MoveCopyPair()</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  {</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keyword">using</span> __do_converts = __and_<is_convertible<_U1&&, _T1>,</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  is_convertible<const _U2&, _T2>>;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">using</span> __converts = <span class="keyword">typename</span> conditional<__implicit,</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  __do_converts,</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  __not_<__do_converts>>::type;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">return</span> __and_<is_constructible<_T1, _U1&&>,</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  is_constructible<_T2, const _U2&&>,</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  __converts</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  >::value;</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>  };</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">struct </span>_PCC<false, _T1, _T2></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="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _ConstructiblePair()</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  {</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  }</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>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _ImplicitlyConvertiblePair()</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>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  }</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>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _MoveConstructiblePair()</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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> </div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> _ImplicitlyMoveConvertiblePair()</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>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  }</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  };</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// PR libstdc++/79141, a utility type for preventing</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">// initialization of an argument of a disabled assignment</span></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="comment">// operator from a pair of empty braces.</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keyword">struct </span>__nonesuch_no_braces : std::__nonesuch {</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keyword">explicit</span> __nonesuch_no_braces(<span class="keyword">const</span> __nonesuch&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  };</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="preprocessor">#endif // C++11</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> _U1, <span class="keyword">typename</span> _U2> <span class="keyword">class </span>__pair_base</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  {</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2> <span class="keyword">friend</span> <span class="keyword">struct </span>pair;</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  __pair_base() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  ~__pair_base() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  __pair_base(<span class="keyword">const</span> __pair_base&) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  __pair_base& operator=(<span class="keyword">const</span> __pair_base&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="preprocessor">#endif // C++11</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  };</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"></span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> /**</span></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> * @brief Struct holding two objects of arbitrary type.</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> *</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment"> * @tparam _T1 Type of first object.</span></div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment"> * @tparam _T2 Type of second object.</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment"> */</span></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00208"></a><span class="lineno"><a class="line" href="a07767.html"> 208</a></span>  <span class="keyword">struct </span><a class="code" href="a07767.html">pair</a></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  : <span class="keyword">private</span> __pair_base<_T1, _T2></div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  {</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">typedef</span> _T1 first_type; <span class="comment">/// @c first_type is the first bound type</span></div><div class="line"><a name="l00212"></a><span class="lineno"><a class="line" href="a07767.html#a6d205c1eab800cb27d82060d11d531a3"> 212</a></span> <span class="comment"></span> <span class="keyword">typedef</span> _T2 <a class="code" href="a07767.html#a6d205c1eab800cb27d82060d11d531a3">second_type</a>; <span class="comment">/// @c second_type is the second bound type</span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment"></span></div><div class="line"><a name="l00214"></a><span class="lineno"><a class="line" href="a07767.html#a198b03cffc037835dc1dc01c926ce251"> 214</a></span>  _T1 <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>; <span class="comment">/// @c first is a copy of the first object</span></div><div class="line"><a name="l00215"></a><span class="lineno"><a class="line" href="a07767.html#a91179413226db12e66346d3673b7835f"> 215</a></span> <span class="comment"></span> _T2 <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>; <span class="comment">/// @c second is a copy of the second object</span></div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment"></span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">// 265. std::pair::pair() effects overly restrictive</span><span class="comment"></span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment"> /** The default constructor creates @c first and @c second using their</span></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment"> * respective default constructors. */</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1 = _T1,</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keyword">typename</span> _U2 = _T2,</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keyword">typename</span> <a class="code" href="a04191.html">enable_if</a><__and_<</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  __is_implicitly_default_constructible<_U1>,</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  __is_implicitly_default_constructible<_U2>></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  ::value, <span class="keywordtype">bool</span>>::type = <span class="keyword">true</span>></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00229"></a><span class="lineno"><a class="line" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403"> 229</a></span>  _GLIBCXX_CONSTEXPR <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>()</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>() { }</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1 = _T1,</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keyword">typename</span> _U2 = _T2,</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keyword">typename</span> <a class="code" href="a04191.html">enable_if</a><__and_<</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <a class="code" href="a03579.html">is_default_constructible<_U1></a>,</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <a class="code" href="a03579.html">is_default_constructible<_U2></a>,</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  __not_<</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  __and_<__is_implicitly_default_constructible<_U1>,</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  __is_implicitly_default_constructible<_U2>>>></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  ::value, <span class="keywordtype">bool</span>>::type = <span class="keyword">false</span>></div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keyword">explicit</span> constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>()</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>() { }</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"></span></div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment"> /** Two objects may be passed to a @c pair constructor to be copied. */</span></div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="preprocessor">#if __cplusplus < 201103L</span></div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> _T1& __a, <span class="keyword">const</span> _T2& __b)</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(__a), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(__b) { }</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="comment">// Shortcut for constraining the templates that don't take pairs.</span></div><div class="line"><a name="l00252"></a><span class="lineno"><a class="line" href="a07767.html#a1f43fbe0731e417b35a98d52ac6b8287"> 252</a></span>  <span class="keyword">using</span> <a class="code" href="a07767.html#a1f43fbe0731e417b35a98d52ac6b8287">_PCCP</a> = _PCC<true, _T1, _T2>;</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1 = _T1, <span class="keyword">typename</span> _U2=_T2, <span class="keyword">typename</span></div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <a class="code" href="a04191.html">enable_if</a><_PCCP::template</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  _ConstructiblePair<_U1, _U2>()</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  && _PCCP::template</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  _ImplicitlyConvertiblePair<_U1, _U2>(),</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">true</span>></div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> _T1& __a, <span class="keyword">const</span> _T2& __b)</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(__a), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(__b) { }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1 = _T1, <span class="keyword">typename</span> _U2=_T2, <span class="keyword">typename</span></div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <a class="code" href="a04191.html">enable_if</a><_PCCP::template</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  _ConstructiblePair<_U1, _U2>()</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  && !_PCCP::template</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  _ImplicitlyConvertiblePair<_U1, _U2>(),</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">false</span>></div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keyword">explicit</span> constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> _T1& __a, <span class="keyword">const</span> _T2& __b)</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(__a), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(__b) { }</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment"></span></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment"> /** There is also a templated copy ctor for the @c pair class itself. */</span></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="preprocessor">#if __cplusplus < 201103L</span></div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> pair<_U1, _U2>& __p)</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(__p.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(__p.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>) { }</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">// Shortcut for constraining the templates that take pairs.</span></div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keyword">using</span> <a class="code" href="a07767.html#a685ed9e4eb27e5926029813616218270">_PCCFP</a> = _PCC<!is_same<_T1, _U1>::value</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  || !is_same<_T2, _U2>::value,</div><div class="line"><a name="l00283"></a><span class="lineno"><a class="line" href="a07767.html#a685ed9e4eb27e5926029813616218270"> 283</a></span>  _T1, _T2>;</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span> </div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2, <span class="keyword">typename</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <a class="code" href="a04191.html">enable_if<_PCCFP<_U1, _U2>::template</a></div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  _ConstructiblePair<_U1, _U2>()</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  && <a class="code" href="a07767.html#a685ed9e4eb27e5926029813616218270">_PCCFP<_U1, _U2>::template</a></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  _ImplicitlyConvertiblePair<_U1, _U2>(),</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">true</span>></div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> <a class="code" href="a07767.html">pair<_U1, _U2></a>& __p)</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(__p.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(__p.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>) { }</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> </div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2, <span class="keyword">typename</span></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <a class="code" href="a04191.html">enable_if<_PCCFP<_U1, _U2>::template</a></div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  _ConstructiblePair<_U1, _U2>()</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  && !_PCCFP<_U1, _U2>::template</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  _ImplicitlyConvertiblePair<_U1, _U2>(),</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">false</span>></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keyword">explicit</span> constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> <a class="code" href="a07767.html">pair<_U1, _U2></a>& __p)</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(__p.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(__p.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>) { }</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span> </div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>&) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>&&) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> </div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="comment">// DR 811.</span></div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span></div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  enable_if<_PCCP::template</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  _MoveCopyPair<true, _U1, _T2>(),</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">true</span>></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(_U1&& __x, <span class="keyword">const</span> _T2& __y)</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U1>(__x)), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(__y) { }</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span> </div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span></div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  enable_if<_PCCP::template</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  _MoveCopyPair<false, _U1, _T2>(),</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">false</span>></div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keyword">explicit</span> constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(_U1&& __x, <span class="keyword">const</span> _T2& __y)</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U1>(__x)), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(__y) { }</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> </div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U2, <span class="keyword">typename</span></div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  enable_if<_PCCP::template</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  _CopyMovePair<true, _T1, _U2>(),</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">true</span>></div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> _T1& __x, _U2&& __y)</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(__x), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U2>(__y)) { }</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U2, <span class="keyword">typename</span></div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  enable_if<_PCCP::template</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  _CopyMovePair<false, _T1, _U2>(),</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">false</span>></div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keyword">explicit</span> <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(<span class="keyword">const</span> _T1& __x, _U2&& __y)</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(__x), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U2>(__y)) { }</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2, <span class="keyword">typename</span></div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  enable_if<_PCCP::template</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  _MoveConstructiblePair<_U1, _U2>()</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  && _PCCP::template</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  _ImplicitlyMoveConvertiblePair<_U1, _U2>(),</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">true</span>></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(_U1&& __x, _U2&& __y)</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U1>(__x)), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U2>(__y)) { }</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2, <span class="keyword">typename</span></div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  enable_if<_PCCP::template</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  _MoveConstructiblePair<_U1, _U2>()</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  && !_PCCP::template</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  _ImplicitlyMoveConvertiblePair<_U1, _U2>(),</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">false</span>></div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keyword">explicit</span> constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(_U1&& __x, _U2&& __y)</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U1>(__x)), <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U2>(__y)) { }</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> </div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2, <span class="keyword">typename</span></div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  enable_if<_PCCFP<_U1, _U2>::template</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  _MoveConstructiblePair<_U1, _U2>()</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  && _PCCFP<_U1, _U2>::template</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  _ImplicitlyMoveConvertiblePair<_U1, _U2>(),</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">true</span>></div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(pair<_U1, _U2>&& __p)</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U1>(__p.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>)),</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U2>(__p.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>)) { }</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> </div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2, <span class="keyword">typename</span></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  enable_if<_PCCFP<_U1, _U2>::template</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  _MoveConstructiblePair<_U1, _U2>()</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  && !_PCCFP<_U1, _U2>::template</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  _ImplicitlyMoveConvertiblePair<_U1, _U2>(),</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keywordtype">bool</span>>::type=<span class="keyword">false</span>></div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keyword">explicit</span> constexpr <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(pair<_U1, _U2>&& __p)</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  : <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U1>(__p.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>)),</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>(<a class="code" href="a01541.html">std</a>::<a class="code" href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a><_U2>(__p.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>)) { }</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>  <span class="keyword">template</span><<span class="keyword">typename</span>... _Args1, <span class="keyword">typename</span>... _Args2></div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(piecewise_construct_t, tuple<_Args1...>, tuple<_Args2...>);</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span> </div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>&</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  operator=(<span class="keyword">typename</span> conditional<</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  __and_<is_copy_assignable<_T1>,</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  is_copy_assignable<_T2>>::value,</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keyword">const</span> <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>&, <span class="keyword">const</span> __nonesuch_no_braces&>::type __p)</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>  <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a> = __p.first;</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a> = __p.second;</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  }</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>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>&</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  operator=(<span class="keyword">typename</span> conditional<</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  __and_<is_move_assignable<_T1>,</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  is_move_assignable<_T2>>::value,</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>&&, __nonesuch_no_braces&&>::type __p)</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  noexcept(__and_<is_nothrow_move_assignable<_T1>,</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  is_nothrow_move_assignable<_T2>>::value)</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>  <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a> = std::forward<first_type>(__p.first);</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a> = std::forward<second_type>(__p.second);</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  }</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span> </div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="keyword">typename</span> enable_if<__and_<is_assignable<_T1&, const _U1&>,</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  is_assignable<_T2&, const _U2&>>::value,</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>&>::type</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  operator=(<span class="keyword">const</span> pair<_U1, _U2>& __p)</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  {</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a> = __p.first;</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a> = __p.second;</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  }</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _U1, <span class="keyword">typename</span> _U2></div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keyword">typename</span> enable_if<__and_<is_assignable<_T1&, _U1&&>,</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  is_assignable<_T2&, _U2&&>>::value,</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>&>::type</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  operator=(pair<_U1, _U2>&& __p)</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  {</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a> = std::forward<_U1>(__p.first);</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a> = std::forward<_U2>(__p.second);</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  }</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span> </div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  swap(<a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>& __p)</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  noexcept(__and_<__is_nothrow_swappable<_T1>,</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  __is_nothrow_swappable<_T2>>::value)</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  {</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keyword">using</span> std::swap;</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  swap(<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>, __p.first);</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  swap(<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>, __p.second);</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  }</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keyword">template</span><<span class="keyword">typename</span>... _Args1, std::size_t... _Indexes1,</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="keyword">typename</span>... _Args2, std::size_t... _Indexes2></div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <a class="code" href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">pair</a>(tuple<_Args1...>&, tuple<_Args2...>&,</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>);</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  };</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span> </div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="preprocessor">#if __cpp_deduction_guides >= 201606</span></div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2> pair(_T1, _T2) -> pair<_T1, _T2>;</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span> <span class="comment"></span></div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span> <span class="comment"> /// Two pairs of the same type are equal iff their members are equal.</span></div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keyword">inline</span> _GLIBCXX_CONSTEXPR <span class="keywordtype">bool</span></div><div class="line"><a name="l00448"></a><span class="lineno"><a class="line" href="a01480.html#ga5559f33b5ba6dbf83e961888d324dd40"> 448</a></span>  operator==(<span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __x, <span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __y)</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  { <span class="keywordflow">return</span> __x.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a> == __y.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a> && __x.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a> == __y.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>; }</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span> <span class="comment"></span></div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span> <span class="comment"> /// <http://gcc.gnu.org/onlinedocs/libstdc++/manual/utilities.html></span></div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="keyword">inline</span> _GLIBCXX_CONSTEXPR <span class="keywordtype">bool</span></div><div class="line"><a name="l00454"></a><span class="lineno"><a class="line" href="a01480.html#ga69e152dbea8e3ca77b307634084fb164"> 454</a></span>  operator<(<span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __x, <span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __y)</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  { <span class="keywordflow">return</span> __x.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a> < __y.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a></div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  || (!(__y.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a> < __x.<a class="code" href="a07767.html#a198b03cffc037835dc1dc01c926ce251">first</a>) && __x.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a> < __y.<a class="code" href="a07767.html#a91179413226db12e66346d3673b7835f">second</a>); }</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span> <span class="comment"></span></div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span> <span class="comment"> /// Uses @c operator== to find the result.</span></div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keyword">inline</span> _GLIBCXX_CONSTEXPR <span class="keywordtype">bool</span></div><div class="line"><a name="l00461"></a><span class="lineno"><a class="line" href="a01480.html#ga226dae1d9406b9c3804f20d31c15e21a"> 461</a></span>  operator!=(<span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __x, <span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __y)</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  { <span class="keywordflow">return</span> !(__x == __y); }</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span> <span class="comment"></span></div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span> <span class="comment"> /// Uses @c operator< to find the result.</span></div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keyword">inline</span> _GLIBCXX_CONSTEXPR <span class="keywordtype">bool</span></div><div class="line"><a name="l00467"></a><span class="lineno"><a class="line" href="a01480.html#ga00de6fe7684f71fc08bad81b4bc65c52"> 467</a></span>  operator>(<span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __x, <span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __y)</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  { <span class="keywordflow">return</span> __y < __x; }</div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span> <span class="comment"></span></div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <span class="comment"> /// Uses @c operator< to find the result.</span></div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keyword">inline</span> _GLIBCXX_CONSTEXPR <span class="keywordtype">bool</span></div><div class="line"><a name="l00473"></a><span class="lineno"><a class="line" href="a01480.html#ga9e2bd7d69af9d03b7df4858595a3202e"> 473</a></span>  operator<=(<span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __x, <span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __y)</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  { <span class="keywordflow">return</span> !(__y < __x); }</div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span> <span class="comment"></span></div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span> <span class="comment"> /// Uses @c operator< to find the result.</span></div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="keyword">inline</span> _GLIBCXX_CONSTEXPR <span class="keywordtype">bool</span></div><div class="line"><a name="l00479"></a><span class="lineno"><a class="line" href="a01480.html#ga4abfa75dbeb7ee6922ab97aaaba57d47"> 479</a></span>  operator>=(<span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __x, <span class="keyword">const</span> <a class="code" href="a07767.html">pair<_T1, _T2></a>& __y)</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  { <span class="keywordflow">return</span> !(__x < __y); }</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span> </div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="comment"> /// See std::pair::swap().</span></div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span> <span class="comment"></span> <span class="comment">// Note: no std::swap overloads in C++03 mode, this has performance</span></div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <span class="comment">// implications, see, eg, libstdc++/38466.</span></div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keyword">inline</span></div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="preprocessor">#if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11</span></div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="comment">// Constrained free swap overload, see p0185r1</span></div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keyword">typename</span> enable_if<__and_<__is_swappable<_T1>,</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  __is_swappable<_T2>>::value>::type</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00495"></a><span class="lineno"><a class="line" href="a01480.html#ga9d75305041fc556b922d4b3bd2667742"> 495</a></span>  swap(<a class="code" href="a07767.html">pair<_T1, _T2></a>& __x, <a class="code" href="a07767.html">pair<_T1, _T2></a>& __y)</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  noexcept(noexcept(__x.swap(__y)))</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  { __x.swap(__y); }</div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span> </div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="preprocessor">#if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++11</span></div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keyword">typename</span> enable_if<!__and_<__is_swappable<_T1>,</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  __is_swappable<_T2>>::value>::type</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  swap(pair<_T1, _T2>&, pair<_T1, _T2>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span> <span class="preprocessor">#endif // __cplusplus >= 201103L</span></div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span> <span class="comment"></span></div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> <span class="comment"> /**</span></div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span> <span class="comment"> * @brief A convenience wrapper for creating a pair from two objects.</span></div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span> <span class="comment"> * @param __x The first object.</span></div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span> <span class="comment"> * @param __y The second object.</span></div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span> <span class="comment"> * @return A newly-constructed pair<> object of the appropriate type.</span></div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="comment"> *</span></div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment"> * The standard requires that the objects be passed by reference-to-const,</span></div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span> <span class="comment"> * but LWG issue #181 says they should be passed by const value. We follow</span></div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span> <span class="comment"> * the LWG by default.</span></div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span> <span class="comment"> */</span></div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="comment">// 181. make_pair() unintended behavior</span></div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="comment">// NB: DR 706.</span></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  constexpr pair<typename __decay_and_strip<_T1>::__type,</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <span class="keyword">typename</span> __decay_and_strip<_T2>::__type></div><div class="line"><a name="l00524"></a><span class="lineno"><a class="line" href="a01480.html#ga0409e288f07b697cb6885d1002df0bd6"> 524</a></span>  <a class="code" href="a01480.html#ga0409e288f07b697cb6885d1002df0bd6">make_pair</a>(_T1&& __x, _T2&& __y)</div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  {</div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> __decay_and_strip<_T1>::__type __ds_type1;</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> __decay_and_strip<_T2>::__type __ds_type2;</div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keyword">typedef</span> <a class="code" href="a07767.html">pair<__ds_type1, __ds_type2></a> __pair_type;</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <span class="keywordflow">return</span> __pair_type(std::forward<_T1>(__x), std::forward<_T2>(__y));</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  }</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _T1, <span class="keyword">typename</span> _T2></div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  <span class="keyword">inline</span> pair<_T1, _T2></div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <a class="code" href="a01480.html#ga0409e288f07b697cb6885d1002df0bd6">make_pair</a>(_T1 __x, _T2 __y)</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  { <span class="keywordflow">return</span> pair<_T1, _T2>(__x, __y); }</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span> <span class="comment"></span></div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span> <span class="comment"> /// @}</span></div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span> <span class="comment"></span></div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span> } <span class="comment">// namespace std</span></div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span> </div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span> <span class="preprocessor">#endif </span><span class="comment">/* _STL_PAIR_H */</span><span class="preprocessor"></span></div><div class="ttc" id="a00422_html"><div class="ttname"><a href="a00422.html">move.h</a></div></div>
<div class="ttc" id="a07767_html"><div class="ttname"><a href="a07767.html">std::pair</a></div><div class="ttdoc">Struct holding two objects of arbitrary type.</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00208">stl_pair.h:208</a></div></div>
<div class="ttc" id="a04191_html"><div class="ttname"><a href="a04191.html">std::enable_if</a></div><div class="ttdoc">Define a member typedef type only if a boolean constant is true.</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l01913">type_traits:1913</a></div></div>
<div class="ttc" id="a00167_html"><div class="ttname"><a href="a00167.html">type_traits</a></div></div>
<div class="ttc" id="a01480_html_ga0409e288f07b697cb6885d1002df0bd6"><div class="ttname"><a href="a01480.html#ga0409e288f07b697cb6885d1002df0bd6">std::make_pair</a></div><div class="ttdeci">constexpr pair< typename __decay_and_strip< _T1 >::__type, typename __decay_and_strip< _T2 >::__type > make_pair(_T1 &&__x, _T2 &&__y)</div><div class="ttdoc">A convenience wrapper for creating a pair from two objects.</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00524">stl_pair.h:524</a></div></div>
<div class="ttc" id="a03579_html"><div class="ttname"><a href="a03579.html">std::is_default_constructible</a></div><div class="ttdoc">is_default_constructible</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l00878">type_traits:878</a></div></div>
<div class="ttc" id="a01541_html"><div class="ttname"><a href="a01541.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div>
<div class="ttc" id="a03575_html"><div class="ttname"><a href="a03575.html">std::is_constructible</a></div><div class="ttdoc">is_constructible</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l00872">type_traits:872</a></div></div>
<div class="ttc" id="a07767_html_a1f43fbe0731e417b35a98d52ac6b8287"><div class="ttname"><a href="a07767.html#a1f43fbe0731e417b35a98d52ac6b8287">std::pair< _BiIter, _BiIter >::_PCCP</a></div><div class="ttdeci">_PCC< true, _BiIter, _BiIter > _PCCP</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00252">stl_pair.h:252</a></div></div>
<div class="ttc" id="a02883_html"><div class="ttname"><a href="a02883.html">std::tuple</a></div><div class="ttdoc">Primary class template, tuple.</div><div class="ttdef"><b>Definition:</b> <a href="a00161_source.html#l00053">tuple:53</a></div></div>
<div class="ttc" id="a07767_html_a6929daaffd0e81a977ee4a694ead8403"><div class="ttname"><a href="a07767.html#a6929daaffd0e81a977ee4a694ead8403">std::pair::pair</a></div><div class="ttdeci">constexpr pair()</div><div class="ttdoc">second is a copy of the second object</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00229">stl_pair.h:229</a></div></div>
<div class="ttc" id="a01480_html_gacb5baec338e12b99cb6bddea7506c7c6"><div class="ttname"><a href="a01480.html#gacb5baec338e12b99cb6bddea7506c7c6">std::forward</a></div><div class="ttdeci">constexpr _Tp && forward(typename std::remove_reference< _Tp >::type &__t) noexcept</div><div class="ttdoc">Forward an lvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00074">move.h:74</a></div></div>
<div class="ttc" id="a07767_html_a6d205c1eab800cb27d82060d11d531a3"><div class="ttname"><a href="a07767.html#a6d205c1eab800cb27d82060d11d531a3">std::pair::second_type</a></div><div class="ttdeci">_T2 second_type</div><div class="ttdoc">first_type is the first bound type</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00212">stl_pair.h:212</a></div></div>
<div class="ttc" id="a07767_html_a198b03cffc037835dc1dc01c926ce251"><div class="ttname"><a href="a07767.html#a198b03cffc037835dc1dc01c926ce251">std::pair::first</a></div><div class="ttdeci">_T1 first</div><div class="ttdoc">second_type is the second bound type</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00214">stl_pair.h:214</a></div></div>
<div class="ttc" id="a01480_html_ga4be4b722e942cd646f19614bcff7a328"><div class="ttname"><a href="a01480.html#ga4be4b722e942cd646f19614bcff7a328">std::piecewise_construct</a></div><div class="ttdeci">_GLIBCXX17_INLINE constexpr piecewise_construct_t piecewise_construct</div><div class="ttdoc">piecewise_construct</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00079">stl_pair.h:79</a></div></div>
<div class="ttc" id="a07767_html_a91179413226db12e66346d3673b7835f"><div class="ttname"><a href="a07767.html#a91179413226db12e66346d3673b7835f">std::pair::second</a></div><div class="ttdeci">_T2 second</div><div class="ttdoc">first is a copy of the first object</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00215">stl_pair.h:215</a></div></div>
<div class="ttc" id="a07747_html"><div class="ttname"><a href="a07747.html">std::piecewise_construct_t</a></div><div class="ttdoc">piecewise_construct_t</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00076">stl_pair.h:76</a></div></div>
<div class="ttc" id="a07767_html_a685ed9e4eb27e5926029813616218270"><div class="ttname"><a href="a07767.html#a685ed9e4eb27e5926029813616218270">std::pair::_PCCFP</a></div><div class="ttdeci">_PCC<!is_same< _T1, _U1 >::value||!is_same< _T2, _U2 >::value, _T1, _T2 > _PCCFP</div><div class="ttdef"><b>Definition:</b> <a href="a00572_source.html#l00283">stl_pair.h:283</a></div></div>
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