<!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++: move.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="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('a00422_source.html','');}); /* @license-end */ </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">move.h</div> </div> </div><!--header--> <div class="contents"> <a href="a00422.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">// Move, forward and identity for C++11 + swap -*- 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) 2007-2018 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> <span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/** @file bits/move.h</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This is an internal header file, included by other library headers.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * Do not attempt to use it directly. @headername{utility}</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> */</span></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> <span class="preprocessor">#ifndef _MOVE_H</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#define _MOVE_H 1</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="code" href="a00656.html">bits/c++config.h</a>></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="a00308.html">bits/concept_check.h</a>></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">namespace </span><a class="code" href="a01538.html">std</a> _GLIBCXX_VISIBILITY(default)</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> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// Used, in C++03 mode too, by allocators, etc.</span><span class="comment"></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"> * @brief Same as C++11 std::addressof</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * @ingroup utilities</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> */</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">inline</span> _GLIBCXX_CONSTEXPR _Tp*</div><div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="a01477.html#ga1954d5552e24586051011312041033f6"> 47</a></span>  <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">__addressof</a>(_Tp& __r) _GLIBCXX_NOEXCEPT</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  { <span class="keywordflow">return</span> __builtin_addressof(__r); }</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> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> } <span class="comment">// namespace</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> <span class="preprocessor">#include <<a class="code" href="a00167.html">type_traits</a>></span> <span class="comment">// Brings in std::declval too.</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="keyword">namespace </span><a class="code" href="a01538.html">std</a> _GLIBCXX_VISIBILITY(default)</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> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"></span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> /**</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * @addtogroup utilities</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * @{</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> */</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"></span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> /**</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * @brief Forward an lvalue.</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * @return The parameter cast to the specified type.</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"> * This function is used to implement "perfect forwarding".</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="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  constexpr _Tp&&</div><div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="a01477.html#gacb5baec338e12b99cb6bddea7506c7c6"> 74</a></span>  <a class="code" href="a01477.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a>(<span class="keyword">typename</span> std::remove_reference<_Tp>::type& __t) noexcept</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  { <span class="keywordflow">return</span> static_cast<_Tp&&>(__t); }</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"></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"> * @brief Forward an rvalue.</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * @return The parameter cast to the specified type.</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> *</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> * This function is used to implement "perfect forwarding".</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> */</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  constexpr _Tp&&</div><div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="a01477.html#gade8e8737b971a056c0ebba2de0295467"> 85</a></span>  <a class="code" href="a01477.html#gacb5baec338e12b99cb6bddea7506c7c6">forward</a>(<span class="keyword">typename</span> std::remove_reference<_Tp>::type&& __t) noexcept</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  {</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  static_assert(!<a class="code" href="a03228.html">std::is_lvalue_reference<_Tp>::value</a>, <span class="stringliteral">"template argument"</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="stringliteral">" substituting _Tp is an lvalue reference type"</span>);</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> static_cast<_Tp&&>(__t);</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  }</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"></span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> /**</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> * @brief Convert a value to an rvalue.</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> * @param __t A thing of arbitrary type.</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> * @return The parameter cast to an rvalue-reference to allow moving it.</span></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> */</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  constexpr <span class="keyword">typename</span> std::remove_reference<_Tp>::type&&</div><div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="a01477.html#ga9f81219bfbfaac50d44f79095a639620"> 99</a></span>  move(_Tp&& __t) noexcept</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  { <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>typename std::remove_reference<_Tp>::type&&<span class="keyword">></span>(__t); }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">struct </span>__move_if_noexcept_cond</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  : <span class="keyword">public</span> __and_<__not_<is_nothrow_move_constructible<_Tp>>,</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  is_copy_constructible<_Tp>>::type { };</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"></span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> /**</span></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> * @brief Conditionally convert a value to an rvalue.</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * @param __x A thing of arbitrary type.</span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * @return The parameter, possibly cast to an rvalue-reference.</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> *</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> * Same as std::move unless the type's move constructor could throw and the</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * type is copyable, in which case an lvalue-reference is returned instead.</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> */</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  constexpr <span class="keyword">typename</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  conditional<__move_if_noexcept_cond<_Tp>::value, <span class="keyword">const</span> _Tp&, _Tp&&>::type</div><div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="a01477.html#gad065507b1d170a56e1ee2c77251554a3"> 119</a></span>  <a class="code" href="a01477.html#gad065507b1d170a56e1ee2c77251554a3">move_if_noexcept</a>(_Tp& __x) noexcept</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  { <span class="keywordflow">return</span> std::move(__x); }</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>  <span class="comment">// declval, from type_traits.</span></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> <span class="preprocessor">#if __cplusplus > 201402L</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="comment">// 2296. std::addressof should be constexpr</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="preprocessor"># define __cpp_lib_addressof_constexpr 201603</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> /**</span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> * @brief Returns the actual address of the object or function</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> * referenced by r, even in the presence of an overloaded</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> * operator&.</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * @param __r Reference to an object or function.</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> * @return The actual address.</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> */</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">inline</span> _GLIBCXX17_CONSTEXPR _Tp*</div><div class="line"><a name="l00138"></a><span class="lineno"><a class="line" href="a01477.html#gafffcfc895d2cfa7c934ec045e884faec"> 138</a></span>  <a class="code" href="a01477.html#gafffcfc895d2cfa7c934ec045e884faec">addressof</a>(_Tp& __r) noexcept</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  { <span class="keywordflow">return</span> <a class="code" href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__r); }</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>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="comment">// 2598. addressof works on temporaries</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">const</span> _Tp* <a class="code" href="a01477.html#gafffcfc895d2cfa7c934ec045e884faec">addressof</a>(<span class="keyword">const</span> _Tp&&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">// C++11 version of std::exchange for internal use.</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up = _Tp></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keyword">inline</span> _Tp</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  __exchange(_Tp& __obj, _Up&& __new_val)</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  {</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  _Tp __old_val = std::move(__obj);</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  __obj = std::forward<_Up>(__new_val);</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">return</span> __old_val;</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  }</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"></span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> /// @} group utilities</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"></span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="preprocessor">#define _GLIBCXX_MOVE(__val) std::move(__val)</span></div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="preprocessor">#define _GLIBCXX_FORWARD(_Tp, __val) std::forward<_Tp>(__val)</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="preprocessor">#define _GLIBCXX_MOVE(__val) (__val)</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="preprocessor">#define _GLIBCXX_FORWARD(_Tp, __val) (__val)</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"></span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"> /**</span></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> * @addtogroup utilities</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"> * @{</span></div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> */</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"></span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> /**</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"> * @brief Swaps two values.</span></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"> * @param __a A thing of arbitrary type.</span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> * @param __b Another thing of arbitrary type.</span></div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * @return Nothing.</span></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> */</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keyword">inline</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">typename</span> enable_if<__and_<__not_<__is_tuple_like<_Tp>>,</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  is_move_constructible<_Tp>,</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  is_move_assignable<_Tp>>::value>::type</div><div class="line"><a name="l00182"></a><span class="lineno"><a class="line" href="a01477.html#gafa6fdf3b3bd0b4a333f150d62001e9fc"> 182</a></span>  swap(_Tp& __a, _Tp& __b)</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  noexcept(__and_<<a class="code" href="a03676.html">is_nothrow_move_constructible<_Tp></a>,</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <a class="code" href="a03752.html">is_nothrow_move_assignable<_Tp></a>>::value)</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  swap(_Tp& __a, _Tp& __b)</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="preprocessor">#endif</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="comment">// concept requirements</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  __glibcxx_function_requires(_SGIAssignableConcept<_Tp>)</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>  _Tp __tmp = _GLIBCXX_MOVE(__a);</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  __a = _GLIBCXX_MOVE(__b);</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  __b = _GLIBCXX_MOVE(__tmp);</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</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>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// DR 809. std::swap should be overloaded for array types.</span><span class="comment"></span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> /// Swap the contents of two arrays.</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keywordtype">size_t</span> _Nm></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keyword">inline</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="preprocessor">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keyword">typename</span> enable_if<__is_swappable<_Tp>::value>::type</div><div class="line"><a name="l00205"></a><span class="lineno"><a class="line" href="a01477.html#ga6b5d2a0f9529c41034917992630c6c85"> 205</a></span>  swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  noexcept(__is_nothrow_swappable<_Tp>::value)</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  {</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> __n = 0; __n < _Nm; ++__n)</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  swap(__a[__n], __b[__n]);</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment"></span></div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment"> /// @} group utilities</span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment"></span>_GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> } <span class="comment">// namespace</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="preprocessor">#endif </span><span class="comment">/* _MOVE_H */</span><span class="preprocessor"></span></div><div class="ttc" id="a00656_html"><div class="ttname"><a href="a00656.html">c++config.h</a></div></div> <div class="ttc" id="a03676_html"><div class="ttname"><a href="a03676.html">std::is_nothrow_move_constructible</a></div><div class="ttdoc">is_nothrow_move_constructible</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l01000">type_traits:1000</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="a01477_html_ga1954d5552e24586051011312041033f6"><div class="ttname"><a href="a01477.html#ga1954d5552e24586051011312041033f6">std::__addressof</a></div><div class="ttdeci">constexpr _Tp * __addressof(_Tp &__r) noexcept</div><div class="ttdoc">Same as C++11 std::addressof.</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00047">move.h:47</a></div></div> <div class="ttc" id="a01477_html_gacb5baec338e12b99cb6bddea7506c7c6"><div class="ttname"><a href="a01477.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="a01477_html_gad065507b1d170a56e1ee2c77251554a3"><div class="ttname"><a href="a01477.html#gad065507b1d170a56e1ee2c77251554a3">std::move_if_noexcept</a></div><div class="ttdeci">constexpr conditional< __move_if_noexcept_cond< _Tp >::value, const _Tp &, _Tp && >::type move_if_noexcept(_Tp &__x) noexcept</div><div class="ttdoc">Conditionally convert a value to an rvalue.</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00119">move.h:119</a></div></div> <div class="ttc" id="a01538_html"><div class="ttname"><a href="a01538.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div> <div class="ttc" id="a03752_html"><div class="ttname"><a href="a03752.html">std::is_nothrow_move_assignable</a></div><div class="ttdoc">is_nothrow_move_assignable</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l01090">type_traits:1090</a></div></div> <div class="ttc" id="a00308_html"><div class="ttname"><a href="a00308.html">concept_check.h</a></div></div> <div class="ttc" id="a01477_html_gafffcfc895d2cfa7c934ec045e884faec"><div class="ttname"><a href="a01477.html#gafffcfc895d2cfa7c934ec045e884faec">std::addressof</a></div><div class="ttdeci">_GLIBCXX17_CONSTEXPR _Tp * addressof(_Tp &__r) noexcept</div><div class="ttdoc">Returns the actual address of the object or function referenced by r, even in the presence of an over...</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00138">move.h:138</a></div></div> <div class="ttc" id="a03228_html"><div class="ttname"><a href="a03228.html">std::is_lvalue_reference</a></div><div class="ttdoc">is_lvalue_reference</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l00374">type_traits:374</a></div></div> </div><!-- fragment --></div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="navelem"><a class="el" href="dir_3a83f109ff04170a1f8448445d1bdcba.html">include</a></li><li class="navelem"><a class="el" href="dir_599c955538774c0249d4ddd97c0a9ae8.html">bits</a></li><li class="navelem"><a class="el" href="a00422.html">move.h</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>