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<a href="a00446.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">// Pointer Traits -*- 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) 2011-2018 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/ptr_traits.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{memory}</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 _PTR_TRAITS_H</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#define _PTR_TRAITS_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">#if __cplusplus >= 201103L</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <<a class="code" href="a00422.html">bits/move.h</a>></span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">namespace </span><a class="code" href="a01541.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">class </span>__undefined;</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// Given Template<T, ...> return T, otherwise invalid.</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">struct </span>__get_first_arg</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  { <span class="keyword">using</span> type = __undefined; };</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">template</span><<span class="keyword">template</span><<span class="keyword">typename</span>, <span class="keyword">typename</span>...> <span class="keyword">class </span>_Template, <span class="keyword">typename</span> _Tp,</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">typename</span>... _Types></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">struct </span>__get_first_arg<_Template<_Tp, _Types...>></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  { <span class="keyword">using</span> type = _Tp; };</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">using</span> __get_first_arg_t = <span class="keyword">typename</span> __get_first_arg<_Tp>::type;</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="comment">// Given Template<T, ...> and U return Template<U, ...>, otherwise invalid.</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">struct </span>__replace_first_arg</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  { };</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">template</span><<span class="keyword">template</span><<span class="keyword">typename</span>, <span class="keyword">typename</span>...> <span class="keyword">class </span>_Template, <span class="keyword">typename</span> _Up,</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">typename</span> _Tp, <span class="keyword">typename</span>... _Types></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">struct </span>__replace_first_arg<_Template<_Tp, _Types...>, _Up></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  { <span class="keyword">using</span> type = _Template<_Up, _Types...>; };</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">using</span> __replace_first_arg_t = <span class="keyword">typename</span> __replace_first_arg<_Tp, _Up>::type;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">using</span> __make_not_void</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  = <span class="keyword">typename</span> conditional<is_void<_Tp>::value, __undefined, _Tp>::type;</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> <span class="comment"> /**</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * @brief Uniform interface to all pointer-like types</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> * @ingroup pointer_abstractions</span></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="keyword">template</span><<span class="keyword">typename</span> _Ptr></div><div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="a06251.html"> 78</a></span>  <span class="keyword">struct </span><a class="code" href="a06251.html">pointer_traits</a></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  {</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">using</span> __element_type = <span class="keyword">typename</span> _Tp::element_type;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">using</span> __difference_type = <span class="keyword">typename</span> _Tp::difference_type;</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up, <span class="keyword">typename</span> = <span class="keywordtype">void</span>></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">struct </span>__rebind : __replace_first_arg<_Tp, _Up> { };</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">struct </span>__rebind<_Tp, _Up, __void_t<typename _Tp::template <a class="code" href="a06251.html#a623750ac65e5d54fc26075bc69af6081">rebind</a><_Up>>></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  { <span class="keyword">using</span> type = <span class="keyword">typename</span> _Tp::template <a class="code" href="a06251.html#a623750ac65e5d54fc26075bc69af6081">rebind<_Up></a>; };</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">public</span>:<span class="comment"></span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> /// The pointer type.</span></div><div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="a06251.html#a7f43cc1c2c600c67cef1972c4618b357"> 96</a></span> <span class="comment"></span> <span class="keyword">using</span> <a class="code" href="a06251.html#a7f43cc1c2c600c67cef1972c4618b357">pointer</a> = _Ptr;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"></span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> /// The type pointed to.</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"></span> <span class="keyword">using</span> <a class="code" href="a06251.html#a2952524002a6723ff9bec4c5dbee8367">element_type</a></div><div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="a06251.html#a2952524002a6723ff9bec4c5dbee8367"> 100</a></span>  = __detected_or_t<__get_first_arg_t<_Ptr>, __element_type, _Ptr>;</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"></span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> /// The type used to represent the difference between two pointers.</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"></span> <span class="keyword">using</span> <a class="code" href="a06251.html#aae92f86267e7a5f41c435f4f28eecbdb">difference_type</a></div><div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="a06251.html#aae92f86267e7a5f41c435f4f28eecbdb"> 104</a></span>  = __detected_or_t<ptrdiff_t, __difference_type, _Ptr>;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"></span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> /// A pointer to a different type.</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Up></div><div class="line"><a name="l00108"></a><span class="lineno"><a class="line" href="a06251.html#a623750ac65e5d54fc26075bc69af6081"> 108</a></span>  <span class="keyword">using</span> <a class="code" href="a06251.html#a623750ac65e5d54fc26075bc69af6081">rebind</a> = <span class="keyword">typename</span> __rebind<_Ptr, _Up>::type;</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>  <span class="keyword">static</span> _Ptr</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  pointer_to(__make_not_void<element_type>& __e)</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  { <span class="keywordflow">return</span> _Ptr::pointer_to(__e); }</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>  static_assert(!<a class="code" href="a03883.html">is_same<element_type, __undefined>::value</a>,</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="stringliteral">"pointer type defines element_type or is like SomePointer<T, Args>"</span>);</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  };</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"></span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> /**</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> * @brief Partial specialization for built-in pointers.</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> * @ingroup pointer_abstractions</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> */</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="a06263.html"> 123</a></span>  <span class="keyword">struct </span><a class="code" href="a06251.html">pointer_traits</a><_Tp*></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  {<span class="comment"></span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> /// The pointer type</span></div><div class="line"><a name="l00126"></a><span class="lineno"><a class="line" href="a06263.html#a662e7c9fa1e9ba89bee4545c22aa3e5e"> 126</a></span> <span class="comment"></span> <span class="keyword">typedef</span> _Tp* <a class="code" href="a06263.html#a662e7c9fa1e9ba89bee4545c22aa3e5e">pointer</a>;<span class="comment"></span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> /// The type pointed to</span></div><div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="a06263.html#ac702e82a55f07abb4e8992a4c9c3d5c1"> 128</a></span> <span class="comment"></span> <span class="keyword">typedef</span> _Tp <a class="code" href="a06263.html#ac702e82a55f07abb4e8992a4c9c3d5c1">element_type</a>;<span class="comment"></span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> /// Type used to represent the difference between two pointers</span></div><div class="line"><a name="l00130"></a><span class="lineno"><a class="line" href="a06263.html#a795f872c4242cf5a82add01ec8a295ed"> 130</a></span> <span class="comment"></span> <span class="keyword">typedef</span> ptrdiff_t <a class="code" href="a06263.html#a795f872c4242cf5a82add01ec8a295ed">difference_type</a>;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Up></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keyword">using</span> rebind = _Up*;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"></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="comment"> * @brief Obtain a pointer to an object</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> * @param __r A reference to an object of type @c element_type</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> * @return @c addressof(__r)</span></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> */</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keyword">static</span> <a class="code" href="a06263.html#a662e7c9fa1e9ba89bee4545c22aa3e5e">pointer</a></div><div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="a06263.html#a7b4ae57aa08b72aa313e1356a3e3284f"> 141</a></span>  <a class="code" href="a06263.html#a7b4ae57aa08b72aa313e1356a3e3284f">pointer_to</a>(__make_not_void<element_type>& __r) noexcept</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  { <span class="keywordflow">return</span> <a class="code" href="a01480.html#gafffcfc895d2cfa7c934ec045e884faec">std::addressof</a>(__r); }</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  };</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"></span></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> /// Convenience alias for rebinding pointers.</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr, <span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00147"></a><span class="lineno"><a class="line" href="a01541.html#a38aba5e1d3bc588b84ea3a970a90fd5f"> 147</a></span>  <span class="keyword">using</span> <a class="code" href="a01541.html#a38aba5e1d3bc588b84ea3a970a90fd5f">__ptr_rebind</a> = <span class="keyword">typename</span> <a class="code" href="a06251.html">pointer_traits<_Ptr>::template</a> rebind<_Tp>;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  constexpr _Tp*</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  __to_address(_Tp* __ptr) noexcept</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>  static_assert(!<a class="code" href="a03247.html">std::is_function<_Tp>::value</a>, <span class="stringliteral">"not a function pointer"</span>);</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">return</span> __ptr;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  }</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="preprocessor">#if __cplusplus <= 201703L</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr></div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  constexpr <span class="keyword">typename</span> <a class="code" href="a06251.html#a2952524002a6723ff9bec4c5dbee8367">std::pointer_traits<_Ptr>::element_type</a>*</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  __to_address(<span class="keyword">const</span> _Ptr& __ptr)</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  { <span class="keywordflow">return</span> std::__to_address(__ptr.operator->()); }</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  constexpr <span class="keyword">auto</span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  __to_address(<span class="keyword">const</span> _Ptr& __ptr) noexcept</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  -> decltype(<a class="code" href="a06251.html">std::pointer_traits<_Ptr>::to_address</a>(__ptr))</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  { <span class="keywordflow">return</span> <a class="code" href="a06251.html">std::pointer_traits<_Ptr>::to_address</a>(__ptr); }</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> _Ptr, <span class="keyword">typename</span>... _None></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  constexpr <span class="keyword">auto</span></div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  __to_address(<span class="keyword">const</span> _Ptr& __ptr, _None...) noexcept</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  { <span class="keywordflow">return</span> std::__to_address(__ptr.operator->()); }</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"></span></div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> /**</span></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> * @brief Obtain address referenced by a pointer to an object</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * @param __ptr A pointer to an object</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * @return @c __ptr</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * @ingroup pointer_abstractions</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> */</span></div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  constexpr _Tp*</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  to_address(_Tp* __ptr) noexcept</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  { <span class="keywordflow">return</span> std::__to_address(__ptr); }</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"></span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> /**</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> * @brief Obtain address referenced by a pointer to an object</span></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> * @param __ptr A pointer to an object</span></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> * @return @c pointer_traits<_Ptr>::to_address(__ptr) if that expression is</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment"> well-formed, otherwise @c to_address(__ptr.operator->())</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment"> * @ingroup pointer_abstractions</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment"> */</span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  constexpr <span class="keyword">auto</span></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  to_address(<span class="keyword">const</span> _Ptr& __ptr) noexcept</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  { <span class="keywordflow">return</span> std::__to_address(__ptr); }</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="preprocessor">#endif // C++2a</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> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> } <span class="comment">// namespace std</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="a06263_html_a662e7c9fa1e9ba89bee4545c22aa3e5e"><div class="ttname"><a href="a06263.html#a662e7c9fa1e9ba89bee4545c22aa3e5e">std::pointer_traits< _Tp * >::pointer</a></div><div class="ttdeci">_Tp * pointer</div><div class="ttdoc">The pointer type.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00126">ptr_traits.h:126</a></div></div>
<div class="ttc" id="a00422_html"><div class="ttname"><a href="a00422.html">move.h</a></div></div>
<div class="ttc" id="a06251_html_aae92f86267e7a5f41c435f4f28eecbdb"><div class="ttname"><a href="a06251.html#aae92f86267e7a5f41c435f4f28eecbdb">std::pointer_traits::difference_type</a></div><div class="ttdeci">__detected_or_t< ptrdiff_t, __difference_type, _Ptr > difference_type</div><div class="ttdoc">The type used to represent the difference between two pointers.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00104">ptr_traits.h:104</a></div></div>
<div class="ttc" id="a03247_html"><div class="ttname"><a href="a03247.html">std::is_function</a></div><div class="ttdoc">is_function</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l00391">type_traits:391</a></div></div>
<div class="ttc" id="a06263_html_ac702e82a55f07abb4e8992a4c9c3d5c1"><div class="ttname"><a href="a06263.html#ac702e82a55f07abb4e8992a4c9c3d5c1">std::pointer_traits< _Tp * >::element_type</a></div><div class="ttdeci">_Tp element_type</div><div class="ttdoc">The type pointed to.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00128">ptr_traits.h:128</a></div></div>
<div class="ttc" id="a01480_html_gafffcfc895d2cfa7c934ec045e884faec"><div class="ttname"><a href="a01480.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="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="a06251_html_a2952524002a6723ff9bec4c5dbee8367"><div class="ttname"><a href="a06251.html#a2952524002a6723ff9bec4c5dbee8367">std::pointer_traits::element_type</a></div><div class="ttdeci">__detected_or_t< __get_first_arg_t< _Ptr >, __element_type, _Ptr > element_type</div><div class="ttdoc">The type pointed to.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00100">ptr_traits.h:100</a></div></div>
<div class="ttc" id="a03883_html"><div class="ttname"><a href="a03883.html">std::is_same</a></div><div class="ttdoc">is_same</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l01286">type_traits:1286</a></div></div>
<div class="ttc" id="a06251_html_a623750ac65e5d54fc26075bc69af6081"><div class="ttname"><a href="a06251.html#a623750ac65e5d54fc26075bc69af6081">std::pointer_traits::rebind</a></div><div class="ttdeci">typename __rebind< _Ptr, _Up >::type rebind</div><div class="ttdoc">A pointer to a different type.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00108">ptr_traits.h:108</a></div></div>
<div class="ttc" id="a06263_html_a795f872c4242cf5a82add01ec8a295ed"><div class="ttname"><a href="a06263.html#a795f872c4242cf5a82add01ec8a295ed">std::pointer_traits< _Tp * >::difference_type</a></div><div class="ttdeci">ptrdiff_t difference_type</div><div class="ttdoc">Type used to represent the difference between two pointers.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00130">ptr_traits.h:130</a></div></div>
<div class="ttc" id="a06251_html"><div class="ttname"><a href="a06251.html">std::pointer_traits</a></div><div class="ttdoc">Uniform interface to all pointer-like types.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00078">ptr_traits.h:78</a></div></div>
<div class="ttc" id="a01541_html_a38aba5e1d3bc588b84ea3a970a90fd5f"><div class="ttname"><a href="a01541.html#a38aba5e1d3bc588b84ea3a970a90fd5f">std::__ptr_rebind</a></div><div class="ttdeci">typename pointer_traits< _Ptr >::template rebind< _Tp > __ptr_rebind</div><div class="ttdoc">Convenience alias for rebinding pointers.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00147">ptr_traits.h:147</a></div></div>
<div class="ttc" id="a06263_html_a7b4ae57aa08b72aa313e1356a3e3284f"><div class="ttname"><a href="a06263.html#a7b4ae57aa08b72aa313e1356a3e3284f">std::pointer_traits< _Tp * >::pointer_to</a></div><div class="ttdeci">static pointer pointer_to(__make_not_void< element_type > &__r) noexcept</div><div class="ttdoc">Obtain a pointer to an object.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00141">ptr_traits.h:141</a></div></div>
<div class="ttc" id="a06251_html_a7f43cc1c2c600c67cef1972c4618b357"><div class="ttname"><a href="a06251.html#a7f43cc1c2c600c67cef1972c4618b357">std::pointer_traits::pointer</a></div><div class="ttdeci">_Ptr pointer</div><div class="ttdoc">The pointer type.</div><div class="ttdef"><b>Definition:</b> <a href="a00446_source.html#l00096">ptr_traits.h:96</a></div></div>
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>
files
>
412
