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<div class="title">ptr_traits.h</div> </div>
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<a href="a01387.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, 2012 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"></span><span class="preprocessor">#define _PTR_TRAITS_H 1</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#ifdef __GXX_EXPERIMENTAL_CXX0X__</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <<a class="code" href="a01553.html">type_traits</a>></span> <span class="comment">// For _GLIBCXX_HAS_NESTED_TYPE</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>std _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> <a class="code" href="a01642.html#ga5483c2bfe929a5938ce633f378db2d55">_GLIBCXX_HAS_NESTED_TYPE</a>(element_type)</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <a class="code" href="a01642.html#ga5483c2bfe929a5938ce633f378db2d55">_GLIBCXX_HAS_NESTED_TYPE</a>(difference_type)</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  template<typename _Tp, <span class="keywordtype">bool</span> = __has_element_type<_Tp>::value></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  struct __ptrtr_elt_type;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  template<typename _Tp></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  struct __ptrtr_elt_type<_Tp, true></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="keyword">typedef</span> <span class="keyword">typename</span> _Tp::element_type __type;</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> </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</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>_SomePtr, <span class="keyword">typename</span> _Tp,</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">typename</span>... _Args></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">struct </span>__ptrtr_elt_type<_SomePtr<_Tp, _Args...>, false></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">typedef</span> _Tp __type;</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> </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  template<typename _Tp, bool = __has_difference_type<_Tp>::value></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">struct </span>__ptrtr_diff_type</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> _Tp::difference_type __type;</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> </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keyword">struct </span>__ptrtr_diff_type<_Tp, false></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">typedef</span> ptrdiff_t __type;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  };</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr, <span class="keyword">typename</span> _Up></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">class </span>__ptrtr_rebind_helper</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  {</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Ptr2, <span class="keyword">typename</span> _Up2></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  _S_chk(<span class="keyword">typename</span> _Ptr2::template rebind<_Up2>*)</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  { <span class="keywordflow">return</span> <span class="keyword">true</span>; }</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">template</span><<span class="keyword">typename</span>, <span class="keyword">typename</span>></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  _S_chk(...)</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  { <span class="keywordflow">return</span> <span class="keyword">false</span>; }</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> __value = _S_chk<_Ptr, _Up>(<span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  };</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="keyword">template</span><<span class="keyword">typename</span> _Ptr, <span class="keyword">typename</span> _Up></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> __ptrtr_rebind_helper<_Ptr, _Up>::__value;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up,</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordtype">bool</span> = __ptrtr_rebind_helper<_Tp, _Up>::__value></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">struct </span>__ptrtr_rebind;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keyword">struct </span>__ptrtr_rebind<_Tp, _Up, true></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  {</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> _Tp::template rebind<_Up> __type;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  };</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>  <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>_SomePtr, <span class="keyword">typename</span> _Up,</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keyword">typename</span> _Tp, <span class="keyword">typename</span>... _Args></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keyword">struct </span>__ptrtr_rebind<_SomePtr<_Tp, _Args...>, _Up, false></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keyword">typedef</span> _SomePtr<_Up, _Args...> __type;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  };</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  template<typename _Tp, typename = typename remove_cv<_Tp>::type></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keyword">struct </span>__ptrtr_not_void</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  {</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">typedef</span> _Tp __type;</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> </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">struct </span>__ptrtr_not_void<_Tp, void></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">struct </span>__type { };</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  };</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="keyword">template</span><<span class="keyword">typename</span> _Ptr></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">class </span>__ptrtr_pointer_to</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="keyword">typedef</span> <span class="keyword">typename</span> __ptrtr_elt_type<_Ptr>::__type __orig_type;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> __ptrtr_not_void<__orig_type>::__type __element_type;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">static</span> _Ptr pointer_to(__element_type& __e)</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  { <span class="keywordflow">return</span> _Ptr::pointer_to(__e); }</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  };</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"></span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * @brief Uniform interface to all pointer-like types</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> * @ingroup pointer_abstractions</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> _Ptr></div>
<div class="line"><a name="l00137"></a><span class="lineno"><a class="code" href="a00878.html"> 137</a></span>  <span class="keyword">struct </span><a class="code" href="a00878.html" title="Uniform interface to all pointer-like types.">pointer_traits</a> : __ptrtr_pointer_to<_Ptr></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  {<span class="comment"></span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> /// The pointer type</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"><a class="code" href="a00878.html#abb2c729873f5e9f90041f5f425967983"> 140</a></span> <span class="comment"></span> <span class="keyword">typedef</span> _Ptr <a class="code" href="a00878.html#abb2c729873f5e9f90041f5f425967983" title="The pointer type.">pointer</a>;<span class="comment"></span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment"> /// The type pointed to</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"><a class="code" href="a00878.html#afbe577731214ffde229449018dac1124"> 142</a></span> <span class="comment"></span> <span class="keyword">typedef</span> <span class="keyword">typename</span> __ptrtr_elt_type<_Ptr>::__type <a class="code" href="a00878.html#afbe577731214ffde229449018dac1124" title="The type pointed to.">element_type</a>;<span class="comment"></span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"> /// Type used to represent the difference between two pointers</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"><a class="code" href="a00878.html#a8342c6ffe992cf695fc6b68aa8c7acd2"> 144</a></span> <span class="comment"></span> <span class="keyword">typedef</span> <span class="keyword">typename</span> __ptrtr_diff_type<_Ptr>::__type <a class="code" href="a00878.html#a8342c6ffe992cf695fc6b68aa8c7acd2" title="Type used to represent the difference between two pointers.">difference_type</a>;</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="keyword">template</span><<span class="keyword">typename</span> _Up></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keyword">using</span> rebind = <span class="keyword">typename</span> __ptrtr_rebind<_Ptr, _Up>::__type;</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="comment"></span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> * @brief Partial specialization for built-in pointers.</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> * @ingroup pointer_abstractions</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div>
<div class="line"><a name="l00155"></a><span class="lineno"><a class="code" href="a00879.html"> 155</a></span>  <span class="keyword">struct </span><a class="code" href="a00878.html" title="Uniform interface to all pointer-like types.">pointer_traits</a><_Tp*></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  {<span class="comment"></span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> /// The pointer type</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"><a class="code" href="a00879.html#a662e7c9fa1e9ba89bee4545c22aa3e5e"> 158</a></span> <span class="comment"></span> <span class="keyword">typedef</span> _Tp* <a class="code" href="a00879.html#a662e7c9fa1e9ba89bee4545c22aa3e5e" title="The pointer type.">pointer</a>;<span class="comment"></span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> /// The type pointed to</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"><a class="code" href="a00879.html#ac702e82a55f07abb4e8992a4c9c3d5c1"> 160</a></span> <span class="comment"></span> <span class="keyword">typedef</span> _Tp <a class="code" href="a00879.html#ac702e82a55f07abb4e8992a4c9c3d5c1" title="The type pointed to.">element_type</a>;<span class="comment"></span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> /// Type used to represent the difference between two pointers</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"><a class="code" href="a00879.html#a795f872c4242cf5a82add01ec8a295ed"> 162</a></span> <span class="comment"></span> <span class="keyword">typedef</span> ptrdiff_t <a class="code" href="a00879.html#a795f872c4242cf5a82add01ec8a295ed" title="Type used to represent the difference between two pointers.">difference_type</a>;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Up></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keyword">using</span> rebind = _Up*;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"></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"> * @brief Obtain a pointer to an object</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"> * @param __r A reference to an object of type @c element_type</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> * @return @c addressof(__r)</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keyword">static</span> pointer</div>
<div class="line"><a name="l00173"></a><span class="lineno"><a class="code" href="a00879.html#a91e554238b086634be2f50cec678e79f"> 173</a></span>  pointer_to(<span class="keyword">typename</span> __ptrtr_not_void<element_type>::__type& __r) noexcept</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  { <span class="keywordflow">return</span> <a class="code" href="a01643.html#gafb3bb408fa78728142a592273108e206" title="Returns the actual address of the object or function referenced by r, even in the presence of an over...">std::addressof</a>(__r); }</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  };</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> _GLIBCXX_END_NAMESPACE_VERSION</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> } <span class="comment">// namespace std</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> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="preprocessor">#endif</span></div>
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