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<a href="a00521.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">// Implementation of std::function -*- 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) 2004-2018 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 include/bits/std_function.h</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This is an internal header file, included by other library headers.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * Do not attempt to use it directly. @headername{functional}</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> */</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#ifndef _GLIBCXX_STD_FUNCTION_H</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#define _GLIBCXX_STD_FUNCTION_H 1</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#pragma GCC system_header</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#if __cplusplus < 201103L</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor"># include <<a class="code" href="a00299.html">bits/c++0x_warning.h</a>></span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#if __cpp_rtti</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor"># include <<a class="code" href="a00035.html">typeinfo</a>></span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include <<a class="code" href="a00542.html">bits/stl_function.h</a>></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include <<a class="code" href="a00380.html">bits/invoke.h</a>></span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#include <<a class="code" href="a00461.html">bits/refwrap.h</a>></span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#include <<a class="code" href="a00356.html">bits/functexcept.h</a>></span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">namespace </span><a class="code" href="a01541.html">std</a> _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> {</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> /**</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * @brief Exception class thrown when class template function's</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * operator() is called with an empty target.</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * @ingroup exceptions</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> */</span></div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="a07083.html"> 56</a></span>  <span class="keyword">class </span><a class="code" href="a07083.html">bad_function_call</a> : <span class="keyword">public</span> <a class="code" href="a05427.html">std::exception</a></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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">virtual</span> ~<a class="code" href="a07083.html">bad_function_call</a>() noexcept;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="a07083.html#adc08d09b07e62fe8943fdda5ab8f56af">what</a>() <span class="keyword">const</span> noexcept;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  };</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"></span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> /**</span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * Trait identifying "location-invariant" types, meaning that the</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * address of the object (or any of its members) will not escape.</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * Trivially copyable types are location-invariant and users can</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * specialize this trait for other types.</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> */</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="a07087.html"> 71</a></span>  <span class="keyword">struct </span><a class="code" href="a07087.html">__is_location_invariant</a></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  : is_trivially_copyable<_Tp>::type</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  { };</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keyword">class </span>_Undefined_class;</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>  <span class="keyword">union </span>_Nocopy_types</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>  <span class="keywordtype">void</span>* _M_object;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">const</span> <span class="keywordtype">void</span>* _M_const_object;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  void (*_M_function_pointer)();</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  void (_Undefined_class::*_M_member_pointer)();</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> </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">union </span>[[gnu::may_alias]] _Any_data</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  {</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordtype">void</span>* _M_access() { <span class="keywordflow">return</span> &_M_pod_data[0]; }</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keyword">const</span> <span class="keywordtype">void</span>* _M_access()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> &_M_pod_data[0]; }</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  _Tp&</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  _M_access()</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  { <span class="keywordflow">return</span> *static_cast<_Tp*>(_M_access()); }</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="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">const</span> _Tp&</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  _M_access()<span class="keyword"> const</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keyword"> </span>{ <span class="keywordflow">return</span> *static_cast<const _Tp*>(_M_access()); }</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  _Nocopy_types _M_unused;</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">char</span> _M_pod_data[<span class="keyword">sizeof</span>(_Nocopy_types)];</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>  <span class="keyword">enum</span> _Manager_operation</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  {</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  __get_type_info,</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  __get_functor_ptr,</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  __clone_functor,</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  __destroy_functor</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> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="comment">// Simple type wrapper that helps avoid annoying const problems</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="comment">// when casting between void pointers and pointers-to-pointers.</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keyword">struct </span>_Simple_type_wrapper</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  {</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  _Simple_type_wrapper(_Tp __value) : __value(__value) { }</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  _Tp __value;</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> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keyword">struct </span>__is_location_invariant<_Simple_type_wrapper<_Tp> ></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  : __is_location_invariant<_Tp></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  { };</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Signature></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">class </span>function;</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"></span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> /// Base class of all polymorphic function object wrappers.</span></div><div class="line"><a name="l00131"></a><span class="lineno"><a class="line" href="a07111.html"> 131</a></span> <span class="comment"></span> <span class="keyword">class </span><a class="code" href="a07111.html">_Function_base</a></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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keyword">static</span> <span class="keyword">const</span> std::size_t _M_max_size = <span class="keyword">sizeof</span>(_Nocopy_types);</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">static</span> <span class="keyword">const</span> std::size_t _M_max_align = __alignof__(_Nocopy_types);</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Functor></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">class </span>_Base_manager</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keyword">protected</span>:</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">bool</span> __stored_locally =</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  (<a class="code" href="a07087.html">__is_location_invariant<_Functor>::value</a></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  && <span class="keyword">sizeof</span>(_Functor) <= _M_max_size</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  && __alignof__(_Functor) <= _M_max_align</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  && (_M_max_align % __alignof__(_Functor) == 0));</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>  <span class="keyword">typedef</span> <a class="code" href="a03043.html">integral_constant<bool, __stored_locally></a> _Local_storage;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="comment">// Retrieve a pointer to the function object</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keyword">static</span> _Functor*</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  _M_get_pointer(<span class="keyword">const</span> _Any_data& __source)</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">const</span> _Functor* __ptr =</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  __stored_locally? <a class="code" href="a01480.html#ga1954d5552e24586051011312041033f6">std::__addressof</a>(__source._M_access<_Functor>())</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="comment">/* have stored a pointer */</span> : __source._M_access<_Functor*>();</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordflow">return</span> const_cast<_Functor*>(__ptr);</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</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>  <span class="comment">// Clone a location-invariant function object that fits within</span></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="comment">// an _Any_data structure.</span></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  _M_clone(_Any_data& __dest, <span class="keyword">const</span> _Any_data& __source, <a class="code" href="a03043.html">true_type</a>)</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  ::new (__dest._M_access()) _Functor(__source._M_access<_Functor>());</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="comment">// Clone a function object that is not location-invariant or</span></div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="comment">// that cannot fit into an _Any_data structure.</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  _M_clone(_Any_data& __dest, <span class="keyword">const</span> _Any_data& __source, <a class="code" href="a03043.html">false_type</a>)</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  __dest._M_access<_Functor*>() =</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keyword">new</span> _Functor(*__source._M_access<_Functor*>());</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</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>  <span class="comment">// Destroying a location-invariant object may still require</span></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">// destruction.</span></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  _M_destroy(_Any_data& __victim, <a class="code" href="a03043.html">true_type</a>)</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>  __victim._M_access<_Functor>().~_Functor();</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  }</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> </div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="comment">// Destroying an object located on the heap.</span></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  _M_destroy(_Any_data& __victim, <a class="code" href="a03043.html">false_type</a>)</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">delete</span> __victim._M_access<_Functor*>();</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  }</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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  _M_manager(_Any_data& __dest, <span class="keyword">const</span> _Any_data& __source,</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  _Manager_operation __op)</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>  <span class="keywordflow">switch</span> (__op)</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  {</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="preprocessor">#if __cpp_rtti</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">case</span> __get_type_info:</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  __dest._M_access<<span class="keyword">const</span> <a class="code" href="a01671.html">type_info</a>*>() = &<span class="keyword">typeid</span>(_Functor);</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">case</span> __get_functor_ptr:</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  __dest._M_access<_Functor*>() = _M_get_pointer(__source);</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">break</span>;</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>  <span class="keywordflow">case</span> __clone_functor:</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  _M_clone(__dest, __source, _Local_storage());</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">break</span>;</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>  <span class="keywordflow">case</span> __destroy_functor:</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  _M_destroy(__dest, _Local_storage());</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">break</span>;</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>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  _M_init_functor(_Any_data& __functor, _Functor&& __f)</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  { _M_init_functor(__functor, std::move(__f), _Local_storage()); }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Signature></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  _M_not_empty_function(<span class="keyword">const</span> function<_Signature>& __f)</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  { <span class="keywordflow">return</span> static_cast<bool>(__f); }</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  _M_not_empty_function(_Tp* __fp)</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  { <span class="keywordflow">return</span> __fp != <span class="keyword">nullptr</span>; }</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="keyword">template</span><<span class="keyword">typename</span> _Class, <span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  _M_not_empty_function(_Tp _Class::* __mp)</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  { <span class="keywordflow">return</span> __mp != <span class="keyword">nullptr</span>; }</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  _M_not_empty_function(<span class="keyword">const</span> _Tp&)</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  { <span class="keywordflow">return</span> <span class="keyword">true</span>; }</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  _M_init_functor(_Any_data& __functor, _Functor&& __f, <a class="code" href="a03043.html">true_type</a>)</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  { ::new (__functor._M_access()) _Functor(std::move(__f)); }</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>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  _M_init_functor(_Any_data& __functor, _Functor&& __f, <a class="code" href="a03043.html">false_type</a>)</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  { __functor._M_access<_Functor*>() = <span class="keyword">new</span> _Functor(std::move(__f)); }</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  };</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>  <a class="code" href="a07111.html">_Function_base</a>() : _M_manager(<span class="keyword">nullptr</span>) { }</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>  ~<a class="code" href="a07111.html">_Function_base</a>()</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  {</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keywordflow">if</span> (_M_manager)</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  _M_manager(_M_functor, _M_functor, __destroy_functor);</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> </div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordtype">bool</span> _M_empty()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> !_M_manager; }</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>  <span class="keyword">typedef</span> bool (*_Manager_type)(_Any_data&, <span class="keyword">const</span> _Any_data&,</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  _Manager_operation);</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>  _Any_data _M_functor;</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  _Manager_type _M_manager;</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> </div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Signature, <span class="keyword">typename</span> _Functor></div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keyword">class </span>_Function_handler;</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Functor, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keyword">class </span>_Function_handler<_Res(_ArgTypes...), _Functor></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  : <span class="keyword">public</span> _Function_base::_Base_manager<_Functor></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>  <span class="keyword">typedef</span> _Function_base::_Base_manager<_Functor> _Base;</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span> </div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keyword">static</span> _Res</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  _M_invoke(<span class="keyword">const</span> _Any_data& __functor, _ArgTypes&&... __args)</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  {</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">return</span> (*_Base::_M_get_pointer(__functor))(</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  std::forward<_ArgTypes>(__args)...);</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  }</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  };</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> </div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Functor, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keyword">class </span>_Function_handler<void(_ArgTypes...), _Functor></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  : <span class="keyword">public</span> _Function_base::_Base_manager<_Functor></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>  <span class="keyword">typedef</span> _Function_base::_Base_manager<_Functor> _Base;</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span> </div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  _M_invoke(<span class="keyword">const</span> _Any_data& __functor, _ArgTypes&&... __args)</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>  (*_Base::_M_get_pointer(__functor))(</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  std::forward<_ArgTypes>(__args)...);</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>  };</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Class, <span class="keyword">typename</span> _Member, <span class="keyword">typename</span> _Res,</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keyword">class </span>_Function_handler<_Res(_ArgTypes...), _Member _Class::*></div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  : <span class="keyword">public</span> _Function_handler<void(_ArgTypes...), _Member _Class::*></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>  <span class="keyword">typedef</span> _Function_handler<void(_ArgTypes...), _Member _Class::*></div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  _Base;</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keyword">static</span> _Res</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  _M_invoke(<span class="keyword">const</span> _Any_data& __functor, _ArgTypes&&... __args)</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  {</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">return</span> <a class="code" href="a01480.html#ga5f5136396a5ab3c02543bb01d4364f40">std::__invoke</a>(_Base::_M_get_pointer(__functor)->__value,</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  std::forward<_ArgTypes>(__args)...);</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  }</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  };</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span> </div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Class, <span class="keyword">typename</span> _Member, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keyword">class </span>_Function_handler<void(_ArgTypes...), _Member _Class::*></div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  : <span class="keyword">public</span> _Function_base::_Base_manager<</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  _Simple_type_wrapper< _Member _Class::* > ></div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  {</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keyword">typedef</span> _Member _Class::* _Functor;</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keyword">typedef</span> _Simple_type_wrapper<_Functor> _Wrapper;</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keyword">typedef</span> _Function_base::_Base_manager<_Wrapper> _Base;</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="keyword">static</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  _M_manager(_Any_data& __dest, <span class="keyword">const</span> _Any_data& __source,</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  _Manager_operation __op)</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  {</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">switch</span> (__op)</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  {</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="preprocessor">#if __cpp_rtti</span></div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">case</span> __get_type_info:</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  __dest._M_access<<span class="keyword">const</span> type_info*>() = &<span class="keyword">typeid</span>(_Functor);</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">case</span> __get_functor_ptr:</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  __dest._M_access<_Functor*>() =</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  &_Base::_M_get_pointer(__source)->__value;</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> </div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  _Base::_M_manager(__dest, __source, __op);</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>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</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>  <span class="keyword">static</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  _M_invoke(<span class="keyword">const</span> _Any_data& __functor, _ArgTypes&&... __args)</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  {</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <a class="code" href="a01480.html#ga5f5136396a5ab3c02543bb01d4364f40">std::__invoke</a>(_Base::_M_get_pointer(__functor)->__value,</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  std::forward<_ArgTypes>(__args)...);</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> </div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _From, <span class="keyword">typename</span> _To></div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keyword">using</span> __check_func_return_type</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  = __or_<is_void<_To>, is_same<_From, _To>, is_convertible<_From, _To>>;</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment"></span></div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment"> /**</span></div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment"> * @brief Primary class template for std::function.</span></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment"> * @ingroup functors</span></div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="comment"> *</span></div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="comment"> * Polymorphic function wrapper.</span></div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment"> */</span></div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00370"></a><span class="lineno"><a class="line" href="a07139.html"> 370</a></span>  <span class="keyword">class </span>function<_Res(_ArgTypes...)></div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  : <span class="keyword">public</span> <a class="code" href="a06459.html">_Maybe_unary_or_binary_function</a><_Res, _ArgTypes...>,</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keyword">private</span> <a class="code" href="a07111.html">_Function_base</a></div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  {</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Func,</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keyword">typename</span> _Res2 = <span class="keyword">typename</span> <a class="code" href="a04279.html">result_of</a><_Func&(_ArgTypes...)>::type></div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keyword">struct </span>_Callable : __check_func_return_type<_Res2, _Res> { };</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>  <span class="comment">// Used so the return type convertibility checks aren't done when</span></div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="comment">// performing overload resolution for copy construction/assignment.</span></div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keyword">struct </span>_Callable<function, _Tp> : <a class="code" href="a03043.html">false_type</a> { };</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>  <span class="keyword">template</span><<span class="keyword">typename</span> _Cond, <span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keyword">using</span> _Requires = <span class="keyword">typename</span> <a class="code" href="a04191.html">enable_if<_Cond::value, _Tp>::type</a>;</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>  <span class="keyword">public</span>:</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keyword">typedef</span> _Res result_type;</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span> </div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="comment">// [3.7.2.1] construct/copy/destroy</span></div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment"></span></div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment"> /**</span></div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment"> * @brief Default construct creates an empty function call wrapper.</span></div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment"> * @post @c !(bool)*this</span></div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment"> */</span></div><div class="line"><a name="l00395"></a><span class="lineno"><a class="line" href="a07139.html#aabc5bfd9d463ca6a06aa8198a1f12e14"> 395</a></span>  <span class="keyword">function</span>() noexcept</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  : <a class="code" href="a07111.html">_Function_base</a>() { }</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="comment"></span></div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment"> /**</span></div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment"> * @brief Creates an empty function call wrapper.</span></div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment"> * @post @c !(bool)*this</span></div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="comment"> */</span></div><div class="line"><a name="l00402"></a><span class="lineno"><a class="line" href="a07139.html#a4a3d52a1f71572613d699d0593479615"> 402</a></span>  <span class="keyword">function</span>(nullptr_t) noexcept</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  : <a class="code" href="a07111.html">_Function_base</a>() { }</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="comment"></span></div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="comment"> /**</span></div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="comment"> * @brief %Function copy constructor.</span></div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment"> * @param __x A %function object with identical call signature.</span></div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment"> * @post @c bool(*this) == bool(__x)</span></div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="comment"> *</span></div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="comment"> * The newly-created %function contains a copy of the target of @a</span></div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> <span class="comment"> * __x (if it has one).</span></div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="comment"> */</span></div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keyword">function</span>(<span class="keyword">const</span> <span class="keyword">function</span>& __x);</div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span> <span class="comment"></span></div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span> <span class="comment"> /**</span></div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span> <span class="comment"> * @brief %Function move constructor.</span></div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span> <span class="comment"> * @param __x A %function object rvalue with identical call signature.</span></div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span> <span class="comment"> *</span></div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="comment"> * The newly-created %function contains the target of @a __x</span></div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="comment"> * (if it has one).</span></div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment"> */</span></div><div class="line"><a name="l00422"></a><span class="lineno"><a class="line" href="a07139.html#a91f39c85ac536220f5efd7e505fc73e6"> 422</a></span>  <span class="keyword">function</span>(<span class="keyword">function</span>&& __x) noexcept : <a class="code" href="a07111.html">_Function_base</a>()</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>  __x.swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  }</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="comment"></span></div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="comment"> /**</span></div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="comment"> * @brief Builds a %function that targets a copy of the incoming</span></div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span> <span class="comment"> * function object.</span></div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span> <span class="comment"> * @param __f A %function object that is callable with parameters of</span></div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span> <span class="comment"> * type @c T1, @c T2, ..., @c TN and returns a value convertible</span></div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span> <span class="comment"> * to @c Res.</span></div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span> <span class="comment"> *</span></div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span> <span class="comment"> * The newly-created %function object will target a copy of</span></div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span> <span class="comment"> * @a __f. If @a __f is @c reference_wrapper<F>, then this function</span></div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span> <span class="comment"> * object will contain a reference to the function object @c</span></div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="comment"> * __f.get(). If @a __f is a NULL function pointer or NULL</span></div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="comment"> * pointer-to-member, the newly-created object will be empty.</span></div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="comment"> *</span></div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="comment"> * If @a __f is a non-NULL function pointer or an object of type @c</span></div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="comment"> * reference_wrapper<F>, this function will not throw.</span></div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span> <span class="comment"> */</span></div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Functor,</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keyword">typename</span> = _Requires<__not_<is_same<_Functor, function>>, <span class="keywordtype">void</span>>,</div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keyword">typename</span> = _Requires<_Callable<_Functor>, <span class="keywordtype">void</span>>></div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keyword">function</span>(_Functor);</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span> <span class="comment"></span></div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span> <span class="comment"> /**</span></div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="comment"> * @brief %Function assignment operator.</span></div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span> <span class="comment"> * @param __x A %function with identical call signature.</span></div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span> <span class="comment"> * @post @c (bool)*this == (bool)x</span></div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="comment"> * @returns @c *this</span></div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span> <span class="comment"> *</span></div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span> <span class="comment"> * The target of @a __x is copied to @c *this. If @a __x has no</span></div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span> <span class="comment"> * target, then @c *this will be empty.</span></div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span> <span class="comment"> *</span></div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span> <span class="comment"> * If @a __x targets a function pointer or a reference to a function</span></div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span> <span class="comment"> * object, then this operation will not throw an %exception.</span></div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span> <span class="comment"> */</span></div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  <span class="keyword">function</span>&</div><div class="line"><a name="l00461"></a><span class="lineno"><a class="line" href="a07139.html#a698ecd83665a25c0c1f9cbe2ea85c2a0"> 461</a></span>  <a class="code" href="a07139.html#a698ecd83665a25c0c1f9cbe2ea85c2a0">operator=</a>(<span class="keyword">const</span> <span class="keyword">function</span>& __x)</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  {</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keyword">function</span>(__x).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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> <span class="comment"></span></div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span> <span class="comment"> /**</span></div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> <span class="comment"> * @brief %Function move-assignment operator.</span></div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span> <span class="comment"> * @param __x A %function rvalue with identical call signature.</span></div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <span class="comment"> * @returns @c *this</span></div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment"> *</span></div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span> <span class="comment"> * The target of @a __x is moved to @c *this. If @a __x has no</span></div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span> <span class="comment"> * target, then @c *this will be empty.</span></div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span> <span class="comment"> *</span></div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span> <span class="comment"> * If @a __x targets a function pointer or a reference to a function</span></div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span> <span class="comment"> * object, then this operation will not throw an %exception.</span></div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="comment"> */</span></div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="keyword">function</span>&</div><div class="line"><a name="l00479"></a><span class="lineno"><a class="line" href="a07139.html#a00bb39127d1936767cbfd81c4bb02354"> 479</a></span>  <a class="code" href="a07139.html#a00bb39127d1936767cbfd81c4bb02354">operator=</a>(<span class="keyword">function</span>&& __x) noexcept</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>  <span class="keyword">function</span>(std::move(__x)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keywordflow">return</span> *<span class="keyword">this</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> <span class="comment"></span></div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="comment"> /**</span></div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="comment"> * @brief %Function assignment to zero.</span></div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="comment"> * @post @c !(bool)*this</span></div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="comment"> * @returns @c *this</span></div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span> <span class="comment"> *</span></div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment"> * The target of @c *this is deallocated, leaving it empty.</span></div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment"> */</span></div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  <span class="keyword">function</span>&</div><div class="line"><a name="l00493"></a><span class="lineno"><a class="line" href="a07139.html#a05ea81faa27f6b5511b699634b83c4a8"> 493</a></span>  <a class="code" href="a07139.html#a05ea81faa27f6b5511b699634b83c4a8">operator=</a>(nullptr_t) noexcept</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  {</div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <span class="keywordflow">if</span> (_M_manager)</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  {</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  _M_manager(_M_functor, _M_functor, __destroy_functor);</div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  _M_manager = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  _M_invoker = <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  }</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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> <span class="comment"></span></div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span> <span class="comment"> /**</span></div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span> <span class="comment"> * @brief %Function assignment to a new target.</span></div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span> <span class="comment"> * @param __f A %function object that is callable with parameters of</span></div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> <span class="comment"> * type @c T1, @c T2, ..., @c TN and returns a value convertible</span></div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span> <span class="comment"> * to @c Res.</span></div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span> <span class="comment"> * @return @c *this</span></div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span> <span class="comment"> *</span></div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span> <span class="comment"> * This %function object wrapper will target a copy of @a</span></div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="comment"> * __f. If @a __f is @c reference_wrapper<F>, then this function</span></div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment"> * object will contain a reference to the function object @c</span></div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span> <span class="comment"> * __f.get(). If @a __f is a NULL function pointer or NULL</span></div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span> <span class="comment"> * pointer-to-member, @c this object will be empty.</span></div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span> <span class="comment"> *</span></div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span> <span class="comment"> * If @a __f is a non-NULL function pointer or an object of type @c</span></div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span> <span class="comment"> * reference_wrapper<F>, this function will not throw.</span></div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="comment"> */</span></div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Functor></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  _Requires<_Callable<typename decay<_Functor>::type>, <span class="keyword">function</span>&></div><div class="line"><a name="l00522"></a><span class="lineno"><a class="line" href="a07139.html#afbb6bdd269617d2793d4dbbb078f6707"> 522</a></span>  <a class="code" href="a07139.html#afbb6bdd269617d2793d4dbbb078f6707">operator=</a>(_Functor&& __f)</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  {</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keyword">function</span>(std::forward<_Functor>(__f)).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  }</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span> <span class="comment"></span></div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span> <span class="comment"> /// @overload</span></div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Functor></div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <span class="keyword">function</span>&</div><div class="line"><a name="l00531"></a><span class="lineno"><a class="line" href="a07139.html#afc4ca535d5508c13e9112b39c8c064d4"> 531</a></span>  <a class="code" href="a07139.html#afc4ca535d5508c13e9112b39c8c064d4">operator=</a>(<a class="code" href="a04175.html">reference_wrapper<_Functor></a> __f) noexcept</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>  <span class="keyword">function</span>(__f).swap(*<span class="keyword">this</span>);</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  }</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>  <span class="comment">// [3.7.2.2] function modifiers</span></div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span> <span class="comment"></span></div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span> <span class="comment"> /**</span></div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span> <span class="comment"> * @brief Swap the targets of two %function objects.</span></div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span> <span class="comment"> * @param __x A %function with identical call signature.</span></div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span> <span class="comment"> *</span></div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span> <span class="comment"> * Swap the targets of @c this function object and @a __f. This</span></div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span> <span class="comment"> * function will not throw an %exception.</span></div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span> <span class="comment"> */</span></div><div class="line"><a name="l00546"></a><span class="lineno"><a class="line" href="a07139.html#ad6e98060b15f59120e426a787febf1a5"> 546</a></span>  <span class="keywordtype">void</span> <a class="code" href="a07139.html#ad6e98060b15f59120e426a787febf1a5">swap</a>(<span class="keyword">function</span>& __x) noexcept</div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  {</div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  std::swap(_M_functor, __x._M_functor);</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  std::swap(_M_manager, __x._M_manager);</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  std::swap(_M_invoker, __x._M_invoker);</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  }</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span> </div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  <span class="comment">// [3.7.2.3] function capacity</span></div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span> <span class="comment"></span></div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span> <span class="comment"> /**</span></div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span> <span class="comment"> * @brief Determine if the %function wrapper has a target.</span></div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span> <span class="comment"> *</span></div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span> <span class="comment"> * @return @c true when this %function object contains a target,</span></div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="comment"> * or @c false when it is empty.</span></div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="comment"> *</span></div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span> <span class="comment"> * This function will not throw an %exception.</span></div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span> <span class="comment"> */</span></div><div class="line"><a name="l00563"></a><span class="lineno"><a class="line" href="a07139.html#a2804a8e2d69cd03550a87d46d153c165"> 563</a></span>  <span class="keyword">explicit</span> <span class="keyword">operator</span> bool() const noexcept</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  { <span class="keywordflow">return</span> !_M_empty(); }</div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span> </div><div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  <span class="comment">// [3.7.2.4] function invocation</span></div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span> <span class="comment"></span></div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span> <span class="comment"> /**</span></div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span> <span class="comment"> * @brief Invokes the function targeted by @c *this.</span></div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span> <span class="comment"> * @returns the result of the target.</span></div><div class="line"><a name="l00571"></a><span class="lineno"> 571</span> <span class="comment"> * @throws bad_function_call when @c !(bool)*this</span></div><div class="line"><a name="l00572"></a><span class="lineno"> 572</span> <span class="comment"> *</span></div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span> <span class="comment"> * The function call operator invokes the target function object</span></div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span> <span class="comment"> * stored by @c this.</span></div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span> <span class="comment"> */</span></div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  _Res operator()(_ArgTypes... __args) <span class="keyword">const</span>;</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span> </div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span> <span class="preprocessor">#if __cpp_rtti</span></div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="comment">// [3.7.2.5] function target access</span><span class="comment"></span></div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span> <span class="comment"> /**</span></div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span> <span class="comment"> * @brief Determine the type of the target of this function object</span></div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span> <span class="comment"> * wrapper.</span></div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span> <span class="comment"> *</span></div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span> <span class="comment"> * @returns the type identifier of the target function object, or</span></div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span> <span class="comment"> * @c typeid(void) if @c !(bool)*this.</span></div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span> <span class="comment"> *</span></div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span> <span class="comment"> * This function will not throw an %exception.</span></div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span> <span class="comment"> */</span></div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <span class="keyword">const</span> <a class="code" href="a01671.html">type_info</a>& target_type() const noexcept;</div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span> <span class="comment"></span></div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span> <span class="comment"> /**</span></div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span> <span class="comment"> * @brief Access the stored target function object.</span></div><div class="line"><a name="l00593"></a><span class="lineno"> 593</span> <span class="comment"> *</span></div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span> <span class="comment"> * @return Returns a pointer to the stored target function object,</span></div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span> <span class="comment"> * if @c typeid(_Functor).equals(target_type()); otherwise, a NULL</span></div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span> <span class="comment"> * pointer.</span></div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span> <span class="comment"> *</span></div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span> <span class="comment"> * This function does not throw exceptions.</span></div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span> <span class="comment"> *</span></div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span> <span class="comment"> * @{</span></div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span> <span class="comment"> */</span></div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  template<typename _Functor> _Functor* target() noexcept;</div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span> </div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  template<typename _Functor> const _Functor* target() const noexcept;</div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  <span class="comment">// @}</span></div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span> </div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <span class="keyword">using</span> _Invoker_type = _Res (*)(<span class="keyword">const</span> _Any_data&, _ArgTypes&&...);</div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  _Invoker_type _M_invoker;</div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  };</div><div class="line"><a name="l00612"></a><span class="lineno"> 612</span> </div><div class="line"><a name="l00613"></a><span class="lineno"> 613</span> <span class="preprocessor">#if __cpp_deduction_guides >= 201606</span></div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keyword">template</span><<span class="keyword">typename</span>></div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <span class="keyword">struct </span>__function_guide_helper</div><div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  { };</div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span> </div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Tp, <span class="keywordtype">bool</span> _Nx, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  <span class="keyword">struct </span>__function_guide_helper<</div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  _Res (_Tp::*) (_Args...) noexcept(_Nx)</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  ></div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  { <span class="keyword">using</span> type = _Res(_Args...); };</div><div class="line"><a name="l00623"></a><span class="lineno"> 623</span> </div><div class="line"><a name="l00624"></a><span class="lineno"> 624</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Tp, <span class="keywordtype">bool</span> _Nx, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="keyword">struct </span>__function_guide_helper<</div><div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  _Res (_Tp::*) (_Args...) & noexcept(_Nx)</div><div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  ></div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  { <span class="keyword">using</span> type = _Res(_Args...); };</div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span> </div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Tp, <span class="keywordtype">bool</span> _Nx, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  <span class="keyword">struct </span>__function_guide_helper<</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  _Res (_Tp::*) (_Args...) const noexcept(_Nx)</div><div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  ></div><div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  { <span class="keyword">using</span> type = _Res(_Args...); };</div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span> </div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span> _Tp, <span class="keywordtype">bool</span> _Nx, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  <span class="keyword">struct </span>__function_guide_helper<</div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  _Res (_Tp::*) (_Args...) const & noexcept(_Nx)</div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  ></div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  { <span class="keyword">using</span> type = _Res(_Args...); };</div><div class="line"><a name="l00641"></a><span class="lineno"> 641</span> </div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keyword">function</span>(_Res(*)(_ArgTypes...)) -> <span class="keyword">function</span><_Res(_ArgTypes...)>;</div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span> </div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Functor, <span class="keyword">typename</span> _Signature = <span class="keyword">typename</span></div><div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  __function_guide_helper<decltype(&_Functor::operator())>::type></div><div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  <span class="keyword">function</span>(_Functor) -> function<_Signature>;</div><div class="line"><a name="l00648"></a><span class="lineno"> 648</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00649"></a><span class="lineno"> 649</span> </div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="comment">// Out-of-line member definitions.</span></div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <span class="keyword">function</span><_Res(_ArgTypes...)>::</div><div class="line"><a name="l00653"></a><span class="lineno"><a class="line" href="a07139.html#a8869fed86e489fcedbf59cd814f440b3"> 653</a></span>  function(<span class="keyword">const</span> <span class="keyword">function</span>& __x)</div><div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  : <a class="code" href="a07111.html">_Function_base</a>()</div><div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  {</div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <span class="keywordflow">if</span> (static_cast<bool>(__x))</div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  {</div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  __x._M_manager(_M_functor, __x._M_functor, __clone_functor);</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  _M_invoker = __x._M_invoker;</div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  _M_manager = __x._M_manager;</div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  }</div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  }</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span> </div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Functor, <span class="keyword">typename</span>, <span class="keyword">typename</span>></div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <span class="keyword">function</span><_Res(_ArgTypes...)>::</div><div class="line"><a name="l00667"></a><span class="lineno"><a class="line" href="a07139.html#a8c5a08fdc36581c53fa597667322cf7d"> 667</a></span>  function(_Functor __f)</div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  : <a class="code" href="a07111.html">_Function_base</a>()</div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  {</div><div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  <span class="keyword">typedef</span> _Function_handler<_Res(_ArgTypes...), _Functor> _My_handler;</div><div class="line"><a name="l00671"></a><span class="lineno"> 671</span> </div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  <span class="keywordflow">if</span> (_My_handler::_M_not_empty_function(__f))</div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  {</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  _My_handler::_M_init_functor(_M_functor, std::move(__f));</div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  _M_invoker = &_My_handler::_M_invoke;</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  _M_manager = &_My_handler::_M_manager;</div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  }</div><div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  }</div><div class="line"><a name="l00679"></a><span class="lineno"> 679</span> </div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  _Res</div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  <span class="keyword">function</span><_Res(_ArgTypes...)>::</div><div class="line"><a name="l00683"></a><span class="lineno"><a class="line" href="a07139.html#ab0bfbd15574ba442c644604dc18c4750"> 683</a></span>  operator()(_ArgTypes... __args) <span class="keyword">const</span></div><div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  {</div><div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  <span class="keywordflow">if</span> (_M_empty())</div><div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  __throw_bad_function_call();</div><div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <span class="keywordflow">return</span> _M_invoker(_M_functor, std::forward<_ArgTypes>(__args)...);</div><div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  }</div><div class="line"><a name="l00689"></a><span class="lineno"> 689</span> </div><div class="line"><a name="l00690"></a><span class="lineno"> 690</span> <span class="preprocessor">#if __cpp_rtti</span></div><div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  <span class="keyword">const</span> <a class="code" href="a01671.html">type_info</a>&</div><div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <span class="keyword">function</span><_Res(_ArgTypes...)>::</div><div class="line"><a name="l00694"></a><span class="lineno"><a class="line" href="a07139.html#a68e477681a31511e5586cd30e7642a51"> 694</a></span>  target_type() const noexcept</div><div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  {</div><div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  <span class="keywordflow">if</span> (_M_manager)</div><div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  {</div><div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  _Any_data __typeinfo_result;</div><div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  _M_manager(__typeinfo_result, _M_functor, __get_type_info);</div><div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  <span class="keywordflow">return</span> *__typeinfo_result._M_access<<span class="keyword">const</span> <a class="code" href="a01671.html">type_info</a>*>();</div><div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  }</div><div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <span class="keywordflow">return</span> <span class="keyword">typeid</span>(void);</div><div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  }</div><div class="line"><a name="l00705"></a><span class="lineno"> 705</span> </div><div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Functor></div><div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  _Functor*</div><div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  <span class="keyword">function</span><_Res(_ArgTypes...)>::</div><div class="line"><a name="l00710"></a><span class="lineno"><a class="line" href="a07139.html#a35397202fc2bfb04958450d0a02836d3"> 710</a></span>  target() noexcept</div><div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  {</div><div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  <span class="keyword">const</span> <span class="keyword">function</span>* __const_this = <span class="keyword">this</span>;</div><div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  <span class="keyword">const</span> _Functor* __func = __const_this->template target<_Functor>();</div><div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  <span class="keywordflow">return</span> const_cast<_Functor*>(__func);</div><div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  }</div><div class="line"><a name="l00716"></a><span class="lineno"> 716</span> </div><div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _ArgTypes></div><div class="line"><a name="l00718"></a><span class="lineno"> 718</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Functor></div><div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  <span class="keyword">const</span> _Functor*</div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  <span class="keyword">function</span><_Res(_ArgTypes...)>::</div><div class="line"><a name="l00721"></a><span class="lineno"><a class="line" href="a07139.html#a1ec2969ae6cf0413547dab469503c843"> 721</a></span>  target() const noexcept</div><div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  {</div><div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <span class="keywordflow">if</span> (<span class="keyword">typeid</span>(_Functor) == target_type() && _M_manager)</div><div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  {</div><div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  _Any_data __ptr;</div><div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  _M_manager(__ptr, _M_functor, __get_functor_ptr);</div><div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  <span class="keywordflow">return</span> __ptr._M_access<<span class="keyword">const</span> _Functor*>();</div><div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  }</div><div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div><div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  }</div><div class="line"><a name="l00732"></a><span class="lineno"> 732</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00733"></a><span class="lineno"> 733</span> </div><div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <span class="comment">// [20.7.15.2.6] null pointer comparisons</span></div><div class="line"><a name="l00735"></a><span class="lineno"> 735</span> <span class="comment"></span></div><div class="line"><a name="l00736"></a><span class="lineno"> 736</span> <span class="comment"> /**</span></div><div class="line"><a name="l00737"></a><span class="lineno"> 737</span> <span class="comment"> * @brief Compares a polymorphic function object wrapper against 0</span></div><div class="line"><a name="l00738"></a><span class="lineno"> 738</span> <span class="comment"> * (the NULL pointer).</span></div><div class="line"><a name="l00739"></a><span class="lineno"> 739</span> <span class="comment"> * @returns @c true if the wrapper has no target, @c false otherwise</span></div><div class="line"><a name="l00740"></a><span class="lineno"> 740</span> <span class="comment"> *</span></div><div class="line"><a name="l00741"></a><span class="lineno"> 741</span> <span class="comment"> * This function will not throw an %exception.</span></div><div class="line"><a name="l00742"></a><span class="lineno"> 742</span> <span class="comment"> */</span></div><div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00745"></a><span class="lineno"><a class="line" href="a01541.html#ad2629e7ee31ca36d6d593639e698db6b"> 745</a></span>  operator==(<span class="keyword">const</span> <span class="keyword">function</span><_Res(_Args...)>& __f, nullptr_t) noexcept</div><div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  { <span class="keywordflow">return</span> !static_cast<bool>(__f); }</div><div class="line"><a name="l00747"></a><span class="lineno"> 747</span> <span class="comment"></span></div><div class="line"><a name="l00748"></a><span class="lineno"> 748</span> <span class="comment"> /// @overload</span></div><div class="line"><a name="l00749"></a><span class="lineno"> 749</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00751"></a><span class="lineno"><a class="line" href="a01541.html#a225870d9721816ebaa535af4e19d0cc1"> 751</a></span>  operator==(nullptr_t, <span class="keyword">const</span> <span class="keyword">function</span><_Res(_Args...)>& __f) noexcept</div><div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  { <span class="keywordflow">return</span> !static_cast<bool>(__f); }</div><div class="line"><a name="l00753"></a><span class="lineno"> 753</span> <span class="comment"></span></div><div class="line"><a name="l00754"></a><span class="lineno"> 754</span> <span class="comment"> /**</span></div><div class="line"><a name="l00755"></a><span class="lineno"> 755</span> <span class="comment"> * @brief Compares a polymorphic function object wrapper against 0</span></div><div class="line"><a name="l00756"></a><span class="lineno"> 756</span> <span class="comment"> * (the NULL pointer).</span></div><div class="line"><a name="l00757"></a><span class="lineno"> 757</span> <span class="comment"> * @returns @c false if the wrapper has no target, @c true otherwise</span></div><div class="line"><a name="l00758"></a><span class="lineno"> 758</span> <span class="comment"> *</span></div><div class="line"><a name="l00759"></a><span class="lineno"> 759</span> <span class="comment"> * This function will not throw an %exception.</span></div><div class="line"><a name="l00760"></a><span class="lineno"> 760</span> <span class="comment"> */</span></div><div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00763"></a><span class="lineno"><a class="line" href="a01541.html#a48d985ba8cc72e159372b14b9114da73"> 763</a></span>  operator!=(<span class="keyword">const</span> <span class="keyword">function</span><_Res(_Args...)>& __f, nullptr_t) noexcept</div><div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  { <span class="keywordflow">return</span> static_cast<bool>(__f); }</div><div class="line"><a name="l00765"></a><span class="lineno"> 765</span> <span class="comment"></span></div><div class="line"><a name="l00766"></a><span class="lineno"> 766</span> <span class="comment"> /// @overload</span></div><div class="line"><a name="l00767"></a><span class="lineno"> 767</span> <span class="comment"></span> <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  <span class="keyword">inline</span> <span class="keywordtype">bool</span></div><div class="line"><a name="l00769"></a><span class="lineno"><a class="line" href="a01541.html#ac0daaa77f5550fd185352175aa05fc89"> 769</a></span>  operator!=(nullptr_t, <span class="keyword">const</span> <span class="keyword">function</span><_Res(_Args...)>& __f) noexcept</div><div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  { <span class="keywordflow">return</span> static_cast<bool>(__f); }</div><div class="line"><a name="l00771"></a><span class="lineno"> 771</span> </div><div class="line"><a name="l00772"></a><span class="lineno"> 772</span> </div><div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  <span class="comment">// [20.7.15.2.7] specialized algorithms</span></div><div class="line"><a name="l00774"></a><span class="lineno"> 774</span> <span class="comment"></span></div><div class="line"><a name="l00775"></a><span class="lineno"> 775</span> <span class="comment"> /**</span></div><div class="line"><a name="l00776"></a><span class="lineno"> 776</span> <span class="comment"> * @brief Swap the targets of two polymorphic function object wrappers.</span></div><div class="line"><a name="l00777"></a><span class="lineno"> 777</span> <span class="comment"> *</span></div><div class="line"><a name="l00778"></a><span class="lineno"> 778</span> <span class="comment"> * This function will not throw an %exception.</span></div><div class="line"><a name="l00779"></a><span class="lineno"> 779</span> <span class="comment"> */</span></div><div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  <span class="comment">// _GLIBCXX_RESOLVE_LIB_DEFECTS</span></div><div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  <span class="comment">// 2062. Effect contradictions w/o no-throw guarantee of std::function swaps</span></div><div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <span class="keyword">template</span><<span class="keyword">typename</span> _Res, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  <span class="keyword">inline</span> <span class="keywordtype">void</span></div><div class="line"><a name="l00784"></a><span class="lineno"><a class="line" href="a01541.html#a4d5a9efe4608a61cb6c74ddda7f8728f"> 784</a></span>  swap(<span class="keyword">function</span><_Res(_Args...)>& __x, <span class="keyword">function</span><_Res(_Args...)>& __y) noexcept</div><div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  { __x.swap(__y); }</div><div class="line"><a name="l00786"></a><span class="lineno"> 786</span> </div><div class="line"><a name="l00787"></a><span class="lineno"> 787</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00788"></a><span class="lineno"> 788</span> } <span class="comment">// namespace std</span></div><div class="line"><a name="l00789"></a><span class="lineno"> 789</span> </div><div class="line"><a name="l00790"></a><span class="lineno"> 790</span> <span class="preprocessor">#endif // C++11</span></div><div class="line"><a name="l00791"></a><span class="lineno"> 791</span> </div><div class="line"><a name="l00792"></a><span class="lineno"> 792</span> <span class="preprocessor">#endif // _GLIBCXX_STD_FUNCTION_H</span></div><div class="ttc" id="a06459_html"><div class="ttname"><a href="a06459.html">std::_Maybe_unary_or_binary_function</a></div><div class="ttdef"><b>Definition:</b> <a href="a00461_source.html#l00053">refwrap.h:53</a></div></div>
<div class="ttc" id="a07139_html_afc4ca535d5508c13e9112b39c8c064d4"><div class="ttname"><a href="a07139.html#afc4ca535d5508c13e9112b39c8c064d4">std::function< _Res(_ArgTypes...)>::operator=</a></div><div class="ttdeci">function & operator=(reference_wrapper< _Functor > __f) noexcept</div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00531">std_function.h:531</a></div></div>
<div class="ttc" id="a07139_html_a05ea81faa27f6b5511b699634b83c4a8"><div class="ttname"><a href="a07139.html#a05ea81faa27f6b5511b699634b83c4a8">std::function< _Res(_ArgTypes...)>::operator=</a></div><div class="ttdeci">function & operator=(nullptr_t) noexcept</div><div class="ttdoc">Function assignment to zero.</div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00493">std_function.h:493</a></div></div>
<div class="ttc" id="a00356_html"><div class="ttname"><a href="a00356.html">functexcept.h</a></div></div>
<div class="ttc" id="a01671_html"><div class="ttname"><a href="a01671.html">std::type_info</a></div><div class="ttdoc">Part of RTTI.</div><div class="ttdef"><b>Definition:</b> <a href="a00035_source.html#l00088">typeinfo:88</a></div></div>
<div class="ttc" id="a00542_html"><div class="ttname"><a href="a00542.html">stl_function.h</a></div></div>
<div class="ttc" id="a07087_html"><div class="ttname"><a href="a07087.html">std::__is_location_invariant</a></div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00071">std_function.h:71</a></div></div>
<div class="ttc" id="a04191_html"><div class="ttname"><a href="a04191.html">std::enable_if</a></div><div class="ttdoc">Define a member typedef type only if a boolean constant is true.</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l01913">type_traits:1913</a></div></div>
<div class="ttc" id="a00035_html"><div class="ttname"><a href="a00035.html">typeinfo</a></div></div>
<div class="ttc" id="a07139_html_ad6e98060b15f59120e426a787febf1a5"><div class="ttname"><a href="a07139.html#ad6e98060b15f59120e426a787febf1a5">std::function< _Res(_ArgTypes...)>::swap</a></div><div class="ttdeci">void swap(function &__x) noexcept</div><div class="ttdoc">Swap the targets of two function objects.</div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00546">std_function.h:546</a></div></div>
<div class="ttc" id="a01480_html_ga1954d5552e24586051011312041033f6"><div class="ttname"><a href="a01480.html#ga1954d5552e24586051011312041033f6">std::__addressof</a></div><div class="ttdeci">constexpr _Tp * __addressof(_Tp &__r) noexcept</div><div class="ttdoc">Same as C++11 std::addressof.</div><div class="ttdef"><b>Definition:</b> <a href="a00422_source.html#l00047">move.h:47</a></div></div>
<div class="ttc" id="a07083_html"><div class="ttname"><a href="a07083.html">std::bad_function_call</a></div><div class="ttdoc">Exception class thrown when class template function's operator() is called with an empty target.</div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00056">std_function.h:56</a></div></div>
<div class="ttc" id="a01480_html_ga5f5136396a5ab3c02543bb01d4364f40"><div class="ttname"><a href="a01480.html#ga5f5136396a5ab3c02543bb01d4364f40">std::__invoke</a></div><div class="ttdeci">constexpr __invoke_result< _Callable, _Args... >::type __invoke(_Callable &&__fn, _Args &&... __args) noexcept(__is_nothrow_invocable< _Callable, _Args... >::value)</div><div class="ttdoc">Invoke a callable object.</div><div class="ttdef"><b>Definition:</b> <a href="a00380_source.html#l00089">invoke.h:89</a></div></div>
<div class="ttc" id="a00299_html"><div class="ttname"><a href="a00299.html">c++0x_warning.h</a></div></div>
<div class="ttc" id="a04279_html"><div class="ttname"><a href="a04279.html">std::result_of</a></div><div class="ttdoc">result_of</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l02081">type_traits:2081</a></div></div>
<div class="ttc" id="a07139_html_a698ecd83665a25c0c1f9cbe2ea85c2a0"><div class="ttname"><a href="a07139.html#a698ecd83665a25c0c1f9cbe2ea85c2a0">std::function< _Res(_ArgTypes...)>::operator=</a></div><div class="ttdeci">function & operator=(const function &__x)</div><div class="ttdoc">Function assignment operator.</div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00461">std_function.h:461</a></div></div>
<div class="ttc" id="a03043_html"><div class="ttname"><a href="a03043.html">std::integral_constant</a></div><div class="ttdoc">integral_constant</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l00057">type_traits:57</a></div></div>
<div class="ttc" id="a07083_html_adc08d09b07e62fe8943fdda5ab8f56af"><div class="ttname"><a href="a07083.html#adc08d09b07e62fe8943fdda5ab8f56af">std::bad_function_call::what</a></div><div class="ttdeci">const char * what() const noexcept</div></div>
<div class="ttc" id="a00461_html"><div class="ttname"><a href="a00461.html">refwrap.h</a></div></div>
<div class="ttc" id="a07111_html"><div class="ttname"><a href="a07111.html">std::_Function_base</a></div><div class="ttdoc">Base class of all polymorphic function object wrappers.</div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00131">std_function.h:131</a></div></div>
<div class="ttc" id="a01541_html"><div class="ttname"><a href="a01541.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div>
<div class="ttc" id="a04175_html"><div class="ttname"><a href="a04175.html">std::reference_wrapper</a></div><div class="ttdoc">Primary class template for reference_wrapper.</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l01887">type_traits:1887</a></div></div>
<div class="ttc" id="a00380_html"><div class="ttname"><a href="a00380.html">invoke.h</a></div></div>
<div class="ttc" id="a07139_html_a00bb39127d1936767cbfd81c4bb02354"><div class="ttname"><a href="a07139.html#a00bb39127d1936767cbfd81c4bb02354">std::function< _Res(_ArgTypes...)>::operator=</a></div><div class="ttdeci">function & operator=(function &&__x) noexcept</div><div class="ttdoc">Function move-assignment operator.</div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00479">std_function.h:479</a></div></div>
<div class="ttc" id="a05427_html"><div class="ttname"><a href="a05427.html">std::exception</a></div><div class="ttdoc">Base class for all library exceptions.</div><div class="ttdef"><b>Definition:</b> <a href="a00326_source.html#l00060">exception.h:60</a></div></div>
<div class="ttc" id="a07139_html_afbb6bdd269617d2793d4dbbb078f6707"><div class="ttname"><a href="a07139.html#afbb6bdd269617d2793d4dbbb078f6707">std::function< _Res(_ArgTypes...)>::operator=</a></div><div class="ttdeci">_Requires< _Callable< typename decay< _Functor >::type >, function & > operator=(_Functor &&__f)</div><div class="ttdoc">Function assignment to a new target.</div><div class="ttdef"><b>Definition:</b> <a href="a00521_source.html#l00522">std_function.h:522</a></div></div>
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