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<a href="a00416.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// Pointer Traits -*- C++ -*-</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;</div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">// Copyright (C) 2011-2015 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<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>&#160;<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>&#160;<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>&#160;<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>&#160;<span class="comment">// any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<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>&#160;<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>&#160;<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>&#160;<span class="comment">// GNU General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<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>&#160;<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>&#160;<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>&#160;</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<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>&#160;<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>&#160;<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>&#160;<span class="comment">// &lt;http://www.gnu.org/licenses/&gt;.</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="comment">/** @file bits/ptr_traits.h</span></div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<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>&#160;<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>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#ifndef _PTR_TRAITS_H</span></div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#define _PTR_TRAITS_H 1</span></div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#if __cplusplus &gt;= 201103L</span></div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="a00161.html">type_traits</a>&gt;</span> <span class="comment">// For _GLIBCXX_HAS_NESTED_TYPE</span></div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">namespace </span><a class="code" href="a01487.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;{</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;_GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;_GLIBCXX_HAS_NESTED_TYPE(element_type)</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;_GLIBCXX_HAS_NESTED_TYPE(difference_type)</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;  template&lt;typename _Tp, bool = __has_element_type&lt;_Tp&gt;::value&gt;</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    <span class="keyword">struct </span>__ptrtr_elt_type;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Tp&gt;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    <span class="keyword">struct </span>__ptrtr_elt_type&lt;_Tp, true&gt;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    {</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;      <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>&#160;    };</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">template</span>&lt;<span class="keyword">typename</span>, <span class="keyword">typename</span>...&gt; <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>&#160;            <span class="keyword">typename</span>... _Args&gt;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    <span class="keyword">struct </span>__ptrtr_elt_type&lt;_SomePtr&lt;_Tp, _Args...&gt;, false&gt;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    {</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;      <span class="keyword">typedef</span> _Tp __type;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    };</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;  template&lt;typename _Tp, bool = __has_difference_type&lt;_Tp&gt;::value&gt;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <span class="keyword">struct </span>__ptrtr_diff_type</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    {</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;      <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>&#160;    };</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Tp&gt;</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    <span class="keyword">struct </span>__ptrtr_diff_type&lt;_Tp, false&gt;</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    {</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;      <span class="keyword">typedef</span> ptrdiff_t __type;</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    };</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Ptr, <span class="keyword">typename</span> _Up&gt;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    <span class="keyword">class </span>__ptrtr_rebind_helper</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    {</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Ptr2, <span class="keyword">typename</span> _Up2&gt;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        <span class="keyword">static</span> constexpr <a class="code" href="a01430.html#ga6a860513044e23d34e553ea986e83fa1">true_type</a></div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;        _S_chk(<span class="keyword">typename</span> _Ptr2::template rebind&lt;_Up2&gt;*);</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span>, <span class="keyword">typename</span>&gt;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        <span class="keyword">static</span> constexpr <a class="code" href="a01430.html#gaebe6729ab5488ecc76c762873d226857">false_type</a></div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;        _S_chk(...);</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    <span class="keyword">public</span>:</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;      <span class="keyword">using</span> __type = decltype(_S_chk&lt;_Ptr, _Up&gt;(<span class="keyword">nullptr</span>));</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    };</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up,</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;           <span class="keywordtype">bool</span> = __ptrtr_rebind_helper&lt;_Tp, _Up&gt;::__type::value&gt;</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    <span class="keyword">struct </span>__ptrtr_rebind;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up&gt;</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keyword">struct </span>__ptrtr_rebind&lt;_Tp, _Up, true&gt;</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;    {</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> _Tp::template rebind&lt;_Up&gt; __type;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    };</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">template</span>&lt;<span class="keyword">typename</span>, <span class="keyword">typename</span>...&gt; <span class="keyword">class </span>_SomePtr, <span class="keyword">typename</span> _Up,</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;            <span class="keyword">typename</span> _Tp, <span class="keyword">typename</span>... _Args&gt;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    <span class="keyword">struct </span>__ptrtr_rebind&lt;_SomePtr&lt;_Tp, _Args...&gt;, _Up, false&gt;</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    {</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;      <span class="keyword">typedef</span> _SomePtr&lt;_Up, _Args...&gt; __type;</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    };</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;  template&lt;typename _Tp, typename = typename remove_cv&lt;_Tp&gt;::type&gt;</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="keyword">struct </span>__ptrtr_not_void</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    {</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;      <span class="keyword">typedef</span> _Tp __type;</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    };</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Tp&gt;</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    <span class="keyword">struct </span>__ptrtr_not_void&lt;_Tp, void&gt;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    {</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;      <span class="keyword">struct </span>__type { };</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    };</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Ptr&gt;</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;    <span class="keyword">class </span>__ptrtr_pointer_to</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    {</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> __ptrtr_elt_type&lt;_Ptr&gt;::__type   __orig_type;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;      <span class="keyword">typedef</span> <span class="keyword">typename</span> __ptrtr_not_void&lt;__orig_type&gt;::__type __element_type;</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    <span class="keyword">public</span>:</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;      <span class="keyword">static</span> _Ptr pointer_to(__element_type&amp; __e)</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;      { <span class="keywordflow">return</span> _Ptr::pointer_to(__e); }</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    };</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="comment">  /**</span></div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;<span class="comment">   * @brief  Uniform interface to all pointer-like types</span></div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;<span class="comment">   * @ingroup pointer_abstractions</span></div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;<span class="comment">  */</span></div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Ptr&gt;</div><div class="line"><a name="l00132"></a><span class="lineno"><a class="line" href="a05741.html">  132</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="a05741.html">pointer_traits</a> : __ptrtr_pointer_to&lt;_Ptr&gt;</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    {<span class="comment"></span></div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;<span class="comment">      /// The pointer type</span></div><div class="line"><a name="l00135"></a><span class="lineno"><a class="line" href="a05741.html#abb2c729873f5e9f90041f5f425967983">  135</a></span>&#160;<span class="comment"></span>      <span class="keyword">typedef</span> _Ptr                                      <a class="code" href="a05741.html#abb2c729873f5e9f90041f5f425967983">pointer</a>;<span class="comment"></span></div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;<span class="comment">      /// The type pointed to</span></div><div class="line"><a name="l00137"></a><span class="lineno"><a class="line" href="a05741.html#afbe577731214ffde229449018dac1124">  137</a></span>&#160;<span class="comment"></span>      <span class="keyword">typedef</span> <span class="keyword">typename</span> __ptrtr_elt_type&lt;_Ptr&gt;::__type   <a class="code" href="a05741.html#afbe577731214ffde229449018dac1124">element_type</a>;<span class="comment"></span></div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;<span class="comment">      /// Type used to represent the difference between two pointers</span></div><div class="line"><a name="l00139"></a><span class="lineno"><a class="line" href="a05741.html#a8342c6ffe992cf695fc6b68aa8c7acd2">  139</a></span>&#160;<span class="comment"></span>      <span class="keyword">typedef</span> <span class="keyword">typename</span> __ptrtr_diff_type&lt;_Ptr&gt;::__type  <a class="code" href="a05741.html#a8342c6ffe992cf695fc6b68aa8c7acd2">difference_type</a>;</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Up&gt;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;        <span class="keyword">using</span> rebind = <span class="keyword">typename</span> __ptrtr_rebind&lt;_Ptr, _Up&gt;::__type;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    };</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;<span class="comment">  /**</span></div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;<span class="comment">   * @brief  Partial specialization for built-in pointers.</span></div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;<span class="comment">   * @ingroup pointer_abstractions</span></div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;<span class="comment">  */</span></div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;  <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Tp&gt;</div><div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="a05745.html">  150</a></span>&#160;    <span class="keyword">struct </span><a class="code" href="a05741.html">pointer_traits</a>&lt;_Tp*&gt;</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    {<span class="comment"></span></div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;<span class="comment">      /// The pointer type</span></div><div class="line"><a name="l00153"></a><span class="lineno"><a class="line" href="a05745.html#a662e7c9fa1e9ba89bee4545c22aa3e5e">  153</a></span>&#160;<span class="comment"></span>      <span class="keyword">typedef</span> _Tp* <a class="code" href="a05745.html#a662e7c9fa1e9ba89bee4545c22aa3e5e">pointer</a>;<span class="comment"></span></div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="comment">      /// The type pointed to</span></div><div class="line"><a name="l00155"></a><span class="lineno"><a class="line" href="a05745.html#ac702e82a55f07abb4e8992a4c9c3d5c1">  155</a></span>&#160;<span class="comment"></span>      <span class="keyword">typedef</span> _Tp  <a class="code" href="a05745.html#ac702e82a55f07abb4e8992a4c9c3d5c1">element_type</a>;<span class="comment"></span></div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;<span class="comment">      /// Type used to represent the difference between two pointers</span></div><div class="line"><a name="l00157"></a><span class="lineno"><a class="line" href="a05745.html#a795f872c4242cf5a82add01ec8a295ed">  157</a></span>&#160;<span class="comment"></span>      <span class="keyword">typedef</span> ptrdiff_t <a class="code" href="a05745.html#a795f872c4242cf5a82add01ec8a295ed">difference_type</a>;</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;      <span class="keyword">template</span>&lt;<span class="keyword">typename</span> _Up&gt;</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;        <span class="keyword">using</span> rebind = _Up*;</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;<span class="comment">      /**</span></div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;<span class="comment">       *  @brief  Obtain a pointer to an object</span></div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;<span class="comment">       *  @param  __r  A reference to an object of type @c element_type</span></div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;<span class="comment">       *  @return @c addressof(__r)</span></div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;<span class="comment">      */</span></div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;      <span class="keyword">static</span> pointer</div><div class="line"><a name="l00168"></a><span class="lineno"><a class="line" href="a05745.html#a91e554238b086634be2f50cec678e79f">  168</a></span>&#160;      <a class="code" href="a05745.html#a91e554238b086634be2f50cec678e79f">pointer_to</a>(<span class="keyword">typename</span> __ptrtr_not_void&lt;element_type&gt;::__type&amp; __r) noexcept</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;      { <span class="keywordflow">return</span> <a class="code" href="a01431.html#gafb3bb408fa78728142a592273108e206">std::addressof</a>(__r); }</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    };</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;_GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;} <span class="comment">// namespace std</span></div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="a05745_html_a795f872c4242cf5a82add01ec8a295ed"><div class="ttname"><a href="a05745.html#a795f872c4242cf5a82add01ec8a295ed">std::pointer_traits&lt; _Tp * &gt;::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="a00416_source.html#l00157">ptr_traits.h:157</a></div></div>
<div class="ttc" id="a05741_html"><div class="ttname"><a href="a05741.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="a00416_source.html#l00132">ptr_traits.h:132</a></div></div>
<div class="ttc" id="a05741_html_abb2c729873f5e9f90041f5f425967983"><div class="ttname"><a href="a05741.html#abb2c729873f5e9f90041f5f425967983">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="a00416_source.html#l00135">ptr_traits.h:135</a></div></div>
<div class="ttc" id="a01431_html_gafb3bb408fa78728142a592273108e206"><div class="ttname"><a href="a01431.html#gafb3bb408fa78728142a592273108e206">std::addressof</a></div><div class="ttdeci">_Tp * addressof(_Tp &amp;__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="a00395_source.html#l00135">move.h:135</a></div></div>
<div class="ttc" id="a00161_html"><div class="ttname"><a href="a00161.html">type_traits</a></div></div>
<div class="ttc" id="a05745_html_ac702e82a55f07abb4e8992a4c9c3d5c1"><div class="ttname"><a href="a05745.html#ac702e82a55f07abb4e8992a4c9c3d5c1">std::pointer_traits&lt; _Tp * &gt;::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="a00416_source.html#l00155">ptr_traits.h:155</a></div></div>
<div class="ttc" id="a01487_html"><div class="ttname"><a href="a01487.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std. </div></div>
<div class="ttc" id="a05741_html_afbe577731214ffde229449018dac1124"><div class="ttname"><a href="a05741.html#afbe577731214ffde229449018dac1124">std::pointer_traits::element_type</a></div><div class="ttdeci">__ptrtr_elt_type&lt; _Ptr &gt;::__type element_type</div><div class="ttdoc">The type pointed to. </div><div class="ttdef"><b>Definition:</b> <a href="a00416_source.html#l00137">ptr_traits.h:137</a></div></div>
<div class="ttc" id="a01430_html_gaebe6729ab5488ecc76c762873d226857"><div class="ttname"><a href="a01430.html#gaebe6729ab5488ecc76c762873d226857">std::false_type</a></div><div class="ttdeci">integral_constant&lt; bool, false &gt; false_type</div><div class="ttdoc">The type used as a compile-time boolean with false value. </div><div class="ttdef"><b>Definition:</b> <a href="a00161_source.html#l00090">type_traits:90</a></div></div>
<div class="ttc" id="a05745_html_a91e554238b086634be2f50cec678e79f"><div class="ttname"><a href="a05745.html#a91e554238b086634be2f50cec678e79f">std::pointer_traits&lt; _Tp * &gt;::pointer_to</a></div><div class="ttdeci">static pointer pointer_to(typename __ptrtr_not_void&lt; element_type &gt;::__type &amp;__r) noexcept</div><div class="ttdoc">Obtain a pointer to an object. </div><div class="ttdef"><b>Definition:</b> <a href="a00416_source.html#l00168">ptr_traits.h:168</a></div></div>
<div class="ttc" id="a05741_html_a8342c6ffe992cf695fc6b68aa8c7acd2"><div class="ttname"><a href="a05741.html#a8342c6ffe992cf695fc6b68aa8c7acd2">std::pointer_traits::difference_type</a></div><div class="ttdeci">__ptrtr_diff_type&lt; _Ptr &gt;::__type difference_type</div><div class="ttdoc">Type used to represent the difference between two pointers. </div><div class="ttdef"><b>Definition:</b> <a href="a00416_source.html#l00139">ptr_traits.h:139</a></div></div>
<div class="ttc" id="a01430_html_ga6a860513044e23d34e553ea986e83fa1"><div class="ttname"><a href="a01430.html#ga6a860513044e23d34e553ea986e83fa1">std::true_type</a></div><div class="ttdeci">integral_constant&lt; bool, true &gt; true_type</div><div class="ttdoc">The type used as a compile-time boolean with true value. </div><div class="ttdef"><b>Definition:</b> <a href="a00161_source.html#l00087">type_traits:87</a></div></div>
<div class="ttc" id="a05745_html_a662e7c9fa1e9ba89bee4545c22aa3e5e"><div class="ttname"><a href="a05745.html#a662e7c9fa1e9ba89bee4545c22aa3e5e">std::pointer_traits&lt; _Tp * &gt;::pointer</a></div><div class="ttdeci">_Tp * pointer</div><div class="ttdoc">The pointer type. </div><div class="ttdef"><b>Definition:</b> <a href="a00416_source.html#l00153">ptr_traits.h:153</a></div></div>
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