<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.15"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libstdc++: propagate_const Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtreedata.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(initResizable); /* @license-end */</script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">libstdc++ </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.15 --> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(document).ready(function(){initNavTree('a01013_source.html','');}); /* @license-end */ </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">propagate_const</div> </div> </div><!--header--> <div class="contents"> <a href="a01013.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> // <experimental/propagate_const> -*- C++ -*-</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> // Copyright (C) 2015-2018 Free Software Foundation, Inc.</div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> //</div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> // This file is part of the GNU ISO C++ Library. This library is free</div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> // software; you can redistribute it and/or modify it under the</div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> // terms of the GNU General Public License as published by the</div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> // Free Software Foundation; either version 3, or (at your option)</div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> // any later version.</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> // This library is distributed in the hope that it will be useful,</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> // but WITHOUT ANY WARRANTY; without even the implied warranty of</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> // GNU General Public License for more details.</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> // Under Section 7 of GPL version 3, you are granted additional</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> // permissions described in the GCC Runtime Library Exception, version</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> // 3.1, as published by the Free Software Foundation.</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> // You should have received a copy of the GNU General Public License and</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> // a copy of the GCC Runtime Library Exception along with this program;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> // <http://www.gnu.org/licenses/>.</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> /** @file experimental/propagate_const</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  * This is a TS C++ Library header.</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  */</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> #ifndef _GLIBCXX_EXPERIMENTAL_PROPAGATE_CONST</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> #define _GLIBCXX_EXPERIMENTAL_PROPAGATE_CONST 1</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> #pragma GCC system_header</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> #if __cplusplus >= 201402L</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> #include <type_traits></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> #include <bits/functional_hash.h></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> #include <bits/move.h></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> #include <bits/stl_function.h></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> #include <experimental/bits/lfts_config.h></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> namespace std _GLIBCXX_VISIBILITY(default)</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> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> namespace experimental</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> inline namespace fundamentals_v2</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>  /**</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  * @defgroup propagate_const Const-propagating wrapper</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  * @ingroup experimental</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  *</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  * A const-propagating wrapper that propagates const to pointer-like members,</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  * as described in n4388 "A Proposal to Add a Const-Propagating Wrapper</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  * to the Standard Library".</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  *</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  * @{</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  */</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> /// Const-propagating wrapper.</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  template <typename _Tp></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  class propagate_const</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>  public:</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  typedef remove_reference_t<decltype(*std::declval<_Tp&>())> element_type;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  private:</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  template <typename _Up></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  struct __is_propagate_const : false_type</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> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  template <typename _Up></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  struct __is_propagate_const<propagate_const<_Up>> : true_type</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  { };</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  template <typename _Up></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  friend constexpr const _Up&</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  get_underlying(const propagate_const<_Up>& __pt) noexcept;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  template <typename _Up></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  friend constexpr _Up&</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  get_underlying(propagate_const<_Up>& __pt) noexcept;</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>  template <typename _Up></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  static constexpr element_type*</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  __to_raw_pointer(_Up* __u)</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  { return __u; }</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>  template <typename _Up></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  static constexpr element_type*</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  __to_raw_pointer(_Up& __u)</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  { return __u.get(); }</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>  template <typename _Up></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  static constexpr const element_type*</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  __to_raw_pointer(const _Up* __u)</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  { return __u; }</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>  template <typename _Up></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  static constexpr const element_type*</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  __to_raw_pointer(const _Up& __u)</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  { return __u.get(); }</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  public:</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  static_assert(__and_<is_object<typename remove_pointer<_Tp>::type>,</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  __not_<is_array<_Tp>>,</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  __or_<is_class<_Tp>, is_pointer<_Tp>>>::value,</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  "propagate_const requires a class or a pointer to an"</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  " object type");</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  // [propagate_const.ctor], constructors</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  constexpr propagate_const() = default;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  propagate_const(const propagate_const& __p) = delete;</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  constexpr propagate_const(propagate_const&& __p) = default;</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  template <typename _Up, typename</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  enable_if<__and_<is_constructible<_Tp, _Up&&>,</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  is_convertible<_Up&&, _Tp>>::value, bool</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  >::type=true></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  constexpr propagate_const(propagate_const<_Up>&& __pu)</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  : _M_t(std::move(get_underlying(__pu)))</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  {}</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  template <typename _Up, typename</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  enable_if<__and_<is_constructible<_Tp, _Up&&>,</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  __not_<is_convertible<_Up&&, _Tp>>>::value,</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  bool>::type=false></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  constexpr explicit propagate_const(propagate_const<_Up>&& __pu)</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  : _M_t(std::move(get_underlying(__pu)))</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  {}</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  template <typename _Up, typename</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  enable_if<__and_<is_constructible<_Tp, _Up&&>,</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  is_convertible<_Up&&, _Tp>,</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  __not_<__is_propagate_const<</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  typename decay<_Up>::type>></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  >::value, bool>::type=true></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  constexpr propagate_const(_Up&& __u)</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  : _M_t(std::forward<_Up>(__u))</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  {}</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  template <typename _Up, typename</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  enable_if<__and_<is_constructible<_Tp, _Up&&>,</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  __not_<is_convertible<_Up&&, _Tp>>,</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  __not_<__is_propagate_const<</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  typename decay<_Up>::type>></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  >::value, bool>::type=false></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  constexpr explicit propagate_const(_Up&& __u)</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  : _M_t(std::forward<_Up>(__u))</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  {}</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  // [propagate_const.assignment], assignment</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  propagate_const& operator=(const propagate_const& __p) = delete;</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  constexpr propagate_const& operator=(propagate_const&& __p) = default;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  template <typename _Up, typename =</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  typename enable_if<is_convertible<_Up&&, _Tp>::value>::type></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  constexpr propagate_const& operator=(propagate_const<_Up>&& __pu)</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>  _M_t = std::move(get_underlying(__pu));</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  return *this;</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  }</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  template <typename _Up, typename =</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  typename enable_if<__and_<is_convertible<_Up&&, _Tp>,</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  __not_<__is_propagate_const<</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  typename decay<_Up>::type>></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  >::value>::type></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  constexpr propagate_const& operator=(_Up&& __u)</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  {</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  _M_t = std::forward<_Up>(__u);</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  return *this;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  // [propagate_const.const_observers], const observers</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  explicit constexpr operator bool() const</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  {</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  return bool(_M_t);</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>  constexpr const element_type* operator->() const</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  return get();</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  }</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  template <typename _Up = _Tp,</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  typename enable_if<__or_<is_pointer<_Up>,</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  is_convertible<_Up,</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  const element_type*></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  >::value, bool>::type = true></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  constexpr operator const element_type*() const</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  {</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  return get();</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  }</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  constexpr const element_type& operator*() const</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  {</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  return *get();</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  }</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  constexpr const element_type* get() const</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  {</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  return __to_raw_pointer(_M_t);</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> </div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  // [propagate_const.non_const_observers], non-const observers</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  constexpr element_type* operator->()</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  {</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  return get();</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  template <typename _Up = _Tp,</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  typename enable_if<__or_<is_pointer<_Up>,</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  is_convertible<_Up,</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  const element_type*></div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  >::value, bool>::type = true></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  constexpr operator element_type*()</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  {</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  return get();</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  }</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  constexpr element_type& operator*()</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  {</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  return *get();</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  }</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  constexpr element_type* get()</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  {</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  return __to_raw_pointer(_M_t);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  }</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  // [propagate_const.modifiers], modifiers</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  constexpr void</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  swap(propagate_const& __pt) noexcept(__is_nothrow_swappable<_Tp>::value)</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  {</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  using std::swap;</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  swap(_M_t, get_underlying(__pt));</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  }</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  private:</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  _Tp _M_t;</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  };</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span> </div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  // [propagate_const.relational], relational operators</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  template <typename _Tp></div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  constexpr bool</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  operator==(const propagate_const<_Tp>& __pt, nullptr_t)</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  {</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  return get_underlying(__pt) == nullptr;</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  template <typename _Tp></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  constexpr bool</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  operator==(nullptr_t, const propagate_const<_Tp>& __pu)</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  {</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  return nullptr == get_underlying(__pu);</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  }</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> </div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  template <typename _Tp></div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  constexpr bool</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  operator!=(const propagate_const<_Tp>& __pt, nullptr_t)</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  {</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  return get_underlying(__pt) != nullptr;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> </div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  template <typename _Tp></div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  constexpr bool operator!=(nullptr_t, const propagate_const<_Tp>& __pu)</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  {</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  return nullptr != get_underlying(__pu);</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  }</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  constexpr bool</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  operator==(const propagate_const<_Tp>& __pt,</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  {</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  return get_underlying(__pt) == get_underlying(__pu);</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  }</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  constexpr bool</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  operator!=(const propagate_const<_Tp>& __pt,</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  {</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  return get_underlying(__pt) != get_underlying(__pu);</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  }</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  constexpr bool</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  operator<(const propagate_const<_Tp>& __pt,</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  {</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  return get_underlying(__pt) < get_underlying(__pu);</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  }</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> </div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  constexpr bool</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  operator>(const propagate_const<_Tp>& __pt,</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  {</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  return get_underlying(__pt) > get_underlying(__pu);</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  }</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span> </div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  constexpr bool</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  operator<=(const propagate_const<_Tp>& __pt,</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  {</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  return get_underlying(__pt) <= get_underlying(__pu);</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  }</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> </div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  constexpr bool</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  operator>=(const propagate_const<_Tp>& __pt,</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  {</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  return get_underlying(__pt) >= get_underlying(__pu);</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  }</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> </div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  constexpr bool</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  operator==(const propagate_const<_Tp>& __pt, const _Up& __u)</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  {</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  return get_underlying(__pt) == __u;</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  }</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> </div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  constexpr bool</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  operator!=(const propagate_const<_Tp>& __pt, const _Up& __u)</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  {</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  return get_underlying(__pt) != __u;</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  }</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  constexpr bool</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  operator<(const propagate_const<_Tp>& __pt, const _Up& __u)</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  {</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  return get_underlying(__pt) < __u;</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  }</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span> </div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  constexpr bool</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  operator>(const propagate_const<_Tp>& __pt, const _Up& __u)</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  {</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  return get_underlying(__pt) > __u;</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  }</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  constexpr bool</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  operator<=(const propagate_const<_Tp>& __pt, const _Up& __u)</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  {</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  return get_underlying(__pt) <= __u;</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  }</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  constexpr bool</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  operator>=(const propagate_const<_Tp>& __pt, const _Up& __u)</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  {</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  return get_underlying(__pt) >= __u;</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  }</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> </div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  constexpr bool</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  operator==(const _Tp& __t, const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  {</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  return __t == get_underlying(__pu);</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  }</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> </div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  constexpr bool</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  operator!=(const _Tp& __t, const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  {</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  return __t != get_underlying(__pu);</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  }</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  constexpr bool</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  operator<(const _Tp& __t, const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  {</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  return __t < get_underlying(__pu);</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  }</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span> </div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  constexpr bool</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  operator>(const _Tp& __t, const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  {</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  return __t > get_underlying(__pu);</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  }</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span> </div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  constexpr bool</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  operator<=(const _Tp& __t, const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  {</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  return __t <= get_underlying(__pu);</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  }</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span> </div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  template <typename _Tp, typename _Up></div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  constexpr bool</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  operator>=(const _Tp& __t, const propagate_const<_Up>& __pu)</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  {</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  return __t >= get_underlying(__pu);</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  }</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span> </div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  // [propagate_const.algorithms], specialized algorithms</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  template <typename _Tp></div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  constexpr void</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  swap(propagate_const<_Tp>& __pt, propagate_const<_Tp>& __pt2)</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  noexcept(__is_nothrow_swappable<_Tp>::value)</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  {</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  __pt.swap(__pt2);</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  }</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span> </div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  // [propagate_const.underlying], underlying pointer access</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  template <typename _Tp></div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  constexpr const _Tp&</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  get_underlying(const propagate_const<_Tp>& __pt) noexcept</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  {</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  return __pt._M_t;</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  }</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span> </div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  template <typename _Tp></div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  constexpr _Tp&</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  get_underlying(propagate_const<_Tp>& __pt) noexcept</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  {</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  return __pt._M_t;</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  }</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span> </div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  // @} group propagate_const</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span> } // namespace fundamentals_v2</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span> } // namespace experimental</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span> </div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span> // [propagate_const.hash], hash support</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  template <typename _Tp></div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  struct hash<experimental::propagate_const<_Tp>></div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  {</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  using result_type = size_t;</div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  using argument_type = experimental::propagate_const<_Tp>;</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span> </div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  size_t</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  operator()(const experimental::propagate_const<_Tp>& __t) const</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  noexcept(noexcept(hash<_Tp>{}(get_underlying(__t))))</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  {</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  return hash<_Tp>{}(get_underlying(__t));</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  }</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  };</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span> </div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  // [propagate_const.comparison_function_objects], comparison function objects</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  template <typename _Tp></div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  struct equal_to<experimental::propagate_const<_Tp>></div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  {</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  constexpr bool</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  operator()(const experimental::propagate_const<_Tp>& __x,</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  const experimental::propagate_const<_Tp>& __y) const</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  {</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  return equal_to<_Tp>{}(get_underlying(__x), get_underlying(__y));</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  }</div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  typedef experimental::propagate_const<_Tp> first_argument_type;</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  typedef experimental::propagate_const<_Tp> second_argument_type;</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  typedef bool result_type;</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  };</div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span> </div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  template <typename _Tp></div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  struct not_equal_to<experimental::propagate_const<_Tp>></div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  {</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  constexpr bool</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  operator()(const experimental::propagate_const<_Tp>& __x,</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  const experimental::propagate_const<_Tp>& __y) const</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  {</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  return not_equal_to<_Tp>{}(get_underlying(__x), get_underlying(__y));</div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  }</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> </div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  typedef experimental::propagate_const<_Tp> first_argument_type;</div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  typedef experimental::propagate_const<_Tp> second_argument_type;</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  typedef bool result_type;</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  };</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span> </div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  template <typename _Tp></div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  struct less<experimental::propagate_const<_Tp>></div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  {</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  constexpr bool</div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  operator()(const experimental::propagate_const<_Tp>& __x,</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  const experimental::propagate_const<_Tp>& __y) const</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  {</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  return less<_Tp>{}(get_underlying(__x), get_underlying(__y));</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  }</div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span> </div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  typedef experimental::propagate_const<_Tp> first_argument_type;</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  typedef experimental::propagate_const<_Tp> second_argument_type;</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  typedef bool result_type;</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  };</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> </div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  template <typename _Tp></div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  struct greater<experimental::propagate_const<_Tp>></div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  {</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  constexpr bool</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  operator()(const experimental::propagate_const<_Tp>& __x,</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  const experimental::propagate_const<_Tp>& __y) const</div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  {</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  return greater<_Tp>{}(get_underlying(__x), get_underlying(__y));</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  }</div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span> </div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  typedef experimental::propagate_const<_Tp> first_argument_type;</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  typedef experimental::propagate_const<_Tp> second_argument_type;</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  typedef bool result_type;</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  };</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span> </div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  template <typename _Tp></div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  struct less_equal<experimental::propagate_const<_Tp>></div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  {</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  constexpr bool</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  operator()(const experimental::propagate_const<_Tp>& __x,</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  const experimental::propagate_const<_Tp>& __y) const</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  {</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  return less_equal<_Tp>{}(get_underlying(__x), get_underlying(__y));</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  }</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span> </div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  typedef experimental::propagate_const<_Tp> first_argument_type;</div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  typedef experimental::propagate_const<_Tp> second_argument_type;</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  typedef bool result_type;</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  };</div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span> </div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  template <typename _Tp></div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  struct greater_equal<experimental::propagate_const<_Tp>></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  {</div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  constexpr bool</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  operator()(const experimental::propagate_const<_Tp>& __x,</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  const experimental::propagate_const<_Tp>& __y) const</div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  {</div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  return greater_equal<_Tp>{}(get_underlying(__x), get_underlying(__y));</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  }</div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span> </div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  typedef experimental::propagate_const<_Tp> first_argument_type;</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  typedef experimental::propagate_const<_Tp> second_argument_type;</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  typedef bool result_type;</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  };</div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span> </div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span> } // namespace std</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span> </div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span> #endif // C++14</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span> </div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span> #endif // _GLIBCXX_EXPERIMENTAL_PROPAGATE_CONST</div></div><!-- fragment --></div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="navelem"><a class="el" href="dir_47f59b4ef76325ed55a7fd4bed4be05b.html">include</a></li><li class="navelem"><a class="el" href="dir_97d1772a3aa272579d5e3bb2a6422878.html">experimental</a></li><li class="navelem"><a class="el" href="a01013.html">propagate_const</a></li> <li class="footer">Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.15 </li> </ul> </div> </body> </html>