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<a href="a16965.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">// <experimental/memory> -*- 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) 2015-2018 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// software; you can redistribute it and/or modify it under the</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// terms of the GNU General Public License as published by the</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// GNU General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/** @file experimental/memory</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This is a TS C++ Library header.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</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> <span class="comment">//</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// N4336 Working Draft, C++ Extensions for Library Fundamentals, Version 2</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">//</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#ifndef _GLIBCXX_EXPERIMENTAL_MEMORY</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#define _GLIBCXX_EXPERIMENTAL_MEMORY 1</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#pragma GCC system_header</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#if __cplusplus >= 201402L</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <<a class="code" href="a16965.html">memory</a>></span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <<a class="code" href="a17211.html">type_traits</a>></span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include <<a class="code" href="a17232.html">utility</a>></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include <<a class="code" href="a17112.html">experimental/bits/shared_ptr.h</a>></span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <<a class="code" href="a00359.html">bits/functional_hash.h</a>></span></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> <span class="keyword">namespace </span><a class="code" href="a01538.html">std</a> _GLIBCXX_VISIBILITY(default)</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> _GLIBCXX_BEGIN_NAMESPACE_VERSION</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">namespace </span>experimental</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> <span class="keyword">inline</span> <span class="keyword">namespace </span>fundamentals_v2</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> <span class="preprocessor">#define __cpp_lib_experimental_observer_ptr 201411</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">class </span>observer_ptr</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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// publish our template parameter and variations thereof</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">using</span> element_type = _Tp;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">using</span> __pointer = add_pointer_t<_Tp>; <span class="comment">// exposition-only</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">using</span> __reference = add_lvalue_reference_t<_Tp>; <span class="comment">// exposition-only</span></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>  <span class="comment">// 3.2.2, observer_ptr constructors</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">// default c’tor</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  constexpr observer_ptr() noexcept</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  : __t()</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  { }</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>  <span class="comment">// pointer-accepting c’tors</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  constexpr observer_ptr(nullptr_t) noexcept</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  : __t()</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> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  constexpr <span class="keyword">explicit</span> observer_ptr(__pointer __p) noexcept</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  : __t(__p)</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</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="comment">// copying c’tors (in addition to compiler-generated copy c’tor)</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> _Up,</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">typename</span> = <span class="keyword">typename</span> enable_if<</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  is_convertible<typename add_pointer<_Up>::type, __pointer</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  >::value</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  >::type></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  constexpr observer_ptr(observer_ptr<_Up> __p) noexcept</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  : __t(__p.get())</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>  }</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="comment">// 3.2.3, observer_ptr observers</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  constexpr __pointer</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  get() const noexcept</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  {</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">return</span> __t;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  constexpr __reference</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <a class="code" href="a01467.html#gaf84b7343bdda8ed9615cd8f5a61c5e83">operator*</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">return</span> *get();</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  }</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  constexpr __pointer</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  operator->() const noexcept</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">return</span> get();</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> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  constexpr <span class="keyword">explicit</span> <span class="keyword">operator</span> bool() const noexcept</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="keywordflow">return</span> get() != <span class="keyword">nullptr</span>;</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="comment">// 3.2.4, observer_ptr conversions</span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  constexpr <span class="keyword">explicit</span> <span class="keyword">operator</span> __pointer() const noexcept</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="keywordflow">return</span> get();</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="comment">// 3.2.5, observer_ptr modifiers</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  constexpr __pointer</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  release() noexcept</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  {</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  __pointer __tmp = get();</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  reset();</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordflow">return</span> __tmp;</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> </div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  constexpr <span class="keywordtype">void</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  reset(__pointer __p = <span class="keyword">nullptr</span>) noexcept</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  {</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  __t = __p;</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  constexpr <span class="keywordtype">void</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  swap(observer_ptr& __p) noexcept</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  {</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  std::swap(__t, __p.__t);</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  }</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  __pointer __t;</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  }; <span class="comment">// observer_ptr<></span></div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordtype">void</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  swap(observer_ptr<_Tp>& __p1, observer_ptr<_Tp>& __p2) noexcept</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  {</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  __p1.swap(__p2);</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> </div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  observer_ptr<_Tp></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  make_observer(_Tp* __p) noexcept</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  {</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">return</span> observer_ptr<_Tp>(__p);</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  operator==(observer_ptr<_Tp> __p1, observer_ptr<_Up> __p2)</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="keywordflow">return</span> __p1.get() == __p2.get();</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  operator!=(observer_ptr<_Tp> __p1, observer_ptr<_Up> __p2)</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>  <span class="keywordflow">return</span> !(__p1 == __p2);</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  operator==(observer_ptr<_Tp> __p, nullptr_t) noexcept</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  {</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">return</span> !__p;</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> </div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  operator==(nullptr_t, observer_ptr<_Tp> __p) noexcept</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  {</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span> !__p;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  }</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  operator!=(observer_ptr<_Tp> __p, nullptr_t) noexcept</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>  <span class="keywordflow">return</span> bool(__p);</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> </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  operator!=(nullptr_t, observer_ptr<_Tp> __p) noexcept</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>  <span class="keywordflow">return</span> bool(__p);</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  operator<(observer_ptr<_Tp> __p1, observer_ptr<_Up> __p2)</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  {</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">return</span> <a class="code" href="a07376.html">std::less<typename common_type<typename add_pointer<_Tp>::type</a>,</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keyword">typename</span> add_pointer<_Up>::type</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  >::type</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  >{}(__p1.get(), __p2.get());</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  }</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> </div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  operator>(observer_ptr<_Tp> __p1, observer_ptr<_Up> __p2)</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  {</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">return</span> __p2 < __p1;</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> </div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  operator<=(observer_ptr<_Tp> __p1, observer_ptr<_Up> __p2)</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>  <span class="keywordflow">return</span> !(__p2 < __p1);</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> </div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordtype">bool</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  operator>=(observer_ptr<_Tp> __p1, observer_ptr<_Up> __p2)</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  {</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">return</span> !(__p1 < __p2);</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> } <span class="comment">// namespace fundamentals_v2</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> } <span class="comment">// namespace experimental</span></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> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keyword">struct </span>hash<experimental::observer_ptr<_Tp>></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  {</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keyword">using</span> result_type = size_t;</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keyword">using</span> argument_type = experimental::observer_ptr<_Tp>;</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordtype">size_t</span></div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  operator()(<span class="keyword">const</span> experimental::observer_ptr<_Tp>& __t) <span class="keyword">const</span></div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  noexcept(noexcept(hash<<span class="keyword">typename</span> add_pointer<_Tp>::type> {}(__t.get())))</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>  <span class="keywordflow">return</span> hash<typename add_pointer<_Tp>::type> {}(__t.get());</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> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> </div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> } <span class="comment">// namespace std</span></div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> </div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="preprocessor">#endif // __cplusplus <= 201103L</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> <span class="preprocessor">#endif // _GLIBCXX_EXPERIMENTAL_MEMORY</span></div><div class="ttc" id="a17211_html"><div class="ttname"><a href="a17211.html">type_traits</a></div></div>
<div class="ttc" id="a00359_html"><div class="ttname"><a href="a00359.html">functional_hash.h</a></div></div>
<div class="ttc" id="a16965_html"><div class="ttname"><a href="a16965.html">memory</a></div></div>
<div class="ttc" id="a01538_html"><div class="ttname"><a href="a01538.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div>
<div class="ttc" id="a17112_html"><div class="ttname"><a href="a17112.html">shared_ptr.h</a></div></div>
<div class="ttc" id="a17232_html"><div class="ttname"><a href="a17232.html">utility</a></div></div>
<div class="ttc" id="a07376_html"><div class="ttname"><a href="a07376.html">std::less</a></div><div class="ttdoc">One of the comparison functors.</div><div class="ttdef"><b>Definition:</b> <a href="a00542_source.html#l00340">stl_function.h:340</a></div></div>
<div class="ttc" id="a01467_html_gaf84b7343bdda8ed9615cd8f5a61c5e83"><div class="ttname"><a href="a01467.html#gaf84b7343bdda8ed9615cd8f5a61c5e83">std::operator*</a></div><div class="ttdeci">complex< _Tp > operator*(const complex< _Tp > &__x, const complex< _Tp > &__y)</div><div class="ttdoc">Return new complex value x times y.</div><div class="ttdef"><b>Definition:</b> <a href="a00053_source.html#l00386">complex:386</a></div></div>
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