<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.13"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>libstdc++: type_traits Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtreedata.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">libstdc++ </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.13 --> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> $(document).ready(function(){initNavTree('a15406_source.html','');}); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">experimental/type_traits</div> </div> </div><!--header--> <div class="contents"> <a href="a15406.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> // Variable Templates For Type Traits -*- C++ -*-</div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> // Copyright (C) 2014-2015 Free Software Foundation, Inc.</div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> //</div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> // This file is part of the GNU ISO C++ Library. This library is free</div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> // software; you can redistribute it and/or modify it under the</div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> // terms of the GNU General Public License as published by the</div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> // Free Software Foundation; either version 3, or (at your option)</div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> // any later version.</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> // This library is distributed in the hope that it will be useful,</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> // but WITHOUT ANY WARRANTY; without even the implied warranty of</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> // GNU General Public License for more details.</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> // Under Section 7 of GPL version 3, you are granted additional</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> // permissions described in the GCC Runtime Library Exception, version</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> // 3.1, as published by the Free Software Foundation.</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> // You should have received a copy of the GNU General Public License and</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> // a copy of the GCC Runtime Library Exception along with this program;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> // <http://www.gnu.org/licenses/>.</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> /** @file experimental/type_traits</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  * This is a TS C++ Library header.</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  */</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> //</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> // N3932 Variable Templates For Type Traits (Revision 1)</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> //</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> #ifndef _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> #define _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS 1</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> #pragma GCC system_header</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> #if __cplusplus <= 201103L</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> # include <bits/c++14_warning.h></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> #else</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> #include <type_traits></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> #include <experimental/lfts_config.h></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> namespace std _GLIBCXX_VISIBILITY(default)</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> namespace experimental</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> inline namespace fundamentals_v1</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> {</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> #define __cpp_lib_experimental_type_trait_variable_templates 201402</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> // See C++14 §20.10.4.1, primary type categories</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> template <typename _Tp></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  constexpr bool is_void_v = is_void<_Tp>::value;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> template <typename _Tp></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> template <typename _Tp></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  constexpr bool is_integral_v = is_integral<_Tp>::value;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> template <typename _Tp></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  constexpr bool is_floating_point_v = is_floating_point<_Tp>::value;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> template <typename _Tp></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  constexpr bool is_array_v = is_array<_Tp>::value;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> template <typename _Tp></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  constexpr bool is_pointer_v = is_pointer<_Tp>::value;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> template <typename _Tp></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  constexpr bool is_lvalue_reference_v = is_lvalue_reference<_Tp>::value;</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> template <typename _Tp></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  constexpr bool is_rvalue_reference_v = is_rvalue_reference<_Tp>::value;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> template <typename _Tp></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  constexpr bool is_member_object_pointer_v =</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  is_member_object_pointer<_Tp>::value;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> template <typename _Tp></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  constexpr bool is_member_function_pointer_v =</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  is_member_function_pointer<_Tp>::value;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> template <typename _Tp></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  constexpr bool is_enum_v = is_enum<_Tp>::value;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> template <typename _Tp></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  constexpr bool is_union_v = is_union<_Tp>::value;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> template <typename _Tp></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  constexpr bool is_class_v = is_class<_Tp>::value;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> template <typename _Tp></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  constexpr bool is_function_v = is_function<_Tp>::value;</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> // See C++14 §20.10.4.2, composite type categories</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> template <typename _Tp></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  constexpr bool is_reference_v = is_reference<_Tp>::value;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> template <typename _Tp></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> template <typename _Tp></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  constexpr bool is_fundamental_v = is_fundamental<_Tp>::value;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> template <typename _Tp></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  constexpr bool is_object_v = is_object<_Tp>::value;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> template <typename _Tp></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  constexpr bool is_scalar_v = is_scalar<_Tp>::value;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> template <typename _Tp></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  constexpr bool is_compound_v = is_compound<_Tp>::value;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> template <typename _Tp></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value;</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> // See C++14 §20.10.4.3, type properties</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> template <typename _Tp></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  constexpr bool is_const_v = is_const<_Tp>::value;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> template <typename _Tp></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  constexpr bool is_volatile_v = is_volatile<_Tp>::value;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> template <typename _Tp></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  constexpr bool is_trivial_v = is_trivial<_Tp>::value;</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> template <typename _Tp></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  constexpr bool is_trivially_copyable_v = is_trivially_copyable<_Tp>::value;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> template <typename _Tp></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value;</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> template <typename _Tp></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  constexpr bool is_pod_v = is_pod<_Tp>::value;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> template <typename _Tp></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  constexpr bool is_literal_type_v = is_literal_type<_Tp>::value;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> template <typename _Tp></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  constexpr bool is_empty_v = is_empty<_Tp>::value;</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> template <typename _Tp></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> template <typename _Tp></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  constexpr bool is_abstract_v = is_abstract<_Tp>::value;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> template <typename _Tp></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  constexpr bool is_final_v = is_final<_Tp>::value;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> template <typename _Tp></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  constexpr bool is_signed_v = is_signed<_Tp>::value;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> template <typename _Tp></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  constexpr bool is_unsigned_v = is_unsigned<_Tp>::value;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> template <typename _Tp, typename... _Args></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  constexpr bool is_constructible_v = is_constructible<_Tp, _Args...>::value;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> template <typename _Tp></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  constexpr bool is_default_constructible_v =</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  is_default_constructible<_Tp>::value;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> template <typename _Tp></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  constexpr bool is_copy_constructible_v = is_copy_constructible<_Tp>::value;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> template <typename _Tp></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  constexpr bool is_move_constructible_v = is_move_constructible<_Tp>::value;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> template <typename _Tp, typename _Up></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> template <typename _Tp></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value;</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> template <typename _Tp></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> template <typename _Tp></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  constexpr bool is_destructible_v = is_destructible<_Tp>::value;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> template <typename _Tp, typename... _Args></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  constexpr bool is_trivially_constructible_v =</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  is_trivially_constructible<_Tp, _Args...>::value;</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> template <typename _Tp></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  constexpr bool is_trivially_default_constructible_v =</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  is_trivially_default_constructible<_Tp>::value;</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> template <typename _Tp></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  constexpr bool is_trivially_copy_constructible_v =</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  is_trivially_copy_constructible<_Tp>::value;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> template <typename _Tp></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  constexpr bool is_trivially_move_constructible_v =</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  is_trivially_move_constructible<_Tp>::value;</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> template <typename _Tp, typename _Up></div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  constexpr bool is_trivially_assignable_v =</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  is_trivially_assignable<_Tp, _Up>::value;</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> template <typename _Tp></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  constexpr bool is_trivially_copy_assignable_v =</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  is_trivially_copy_assignable<_Tp>::value;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> template <typename _Tp></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  constexpr bool is_trivially_move_assignable_v =</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  is_trivially_move_assignable<_Tp>::value;</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> template <typename _Tp></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  constexpr bool is_trivially_destructible_v =</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  is_trivially_destructible<_Tp>::value;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> template <typename _Tp, typename... _Args></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  constexpr bool is_nothrow_constructible_v =</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  is_nothrow_constructible<_Tp, _Args...>::value;</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> template <typename _Tp></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  constexpr bool is_nothrow_default_constructible_v =</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  is_nothrow_default_constructible<_Tp>::value;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> template <typename _Tp></div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  constexpr bool is_nothrow_copy_constructible_v =</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  is_nothrow_copy_constructible<_Tp>::value;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> template <typename _Tp></div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  constexpr bool is_nothrow_move_constructible_v =</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  is_nothrow_move_constructible<_Tp>::value;</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> template <typename _Tp, typename _Up></div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  constexpr bool is_nothrow_assignable_v =</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  is_nothrow_assignable<_Tp, _Up>::value;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> template <typename _Tp></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  constexpr bool is_nothrow_copy_assignable_v =</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  is_nothrow_copy_assignable<_Tp>::value;</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> template <typename _Tp></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  constexpr bool is_nothrow_move_assignable_v =</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  is_nothrow_move_assignable<_Tp>::value;</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> template <typename _Tp></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  constexpr bool is_nothrow_destructible_v =</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  is_nothrow_destructible<_Tp>::value;</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> template <typename _Tp></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  constexpr bool has_virtual_destructor_v =</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  has_virtual_destructor<_Tp>::value;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> // See C++14 §20.10.5, type property queries</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> template <typename _Tp></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  constexpr size_t alignment_of_v = alignment_of<_Tp>::value;</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> template <typename _Tp></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  constexpr size_t rank_v = rank<_Tp>::value;</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> template <typename _Tp, unsigned _Idx = 0></div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  constexpr size_t extent_v = extent<_Tp, _Idx>::value;</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> // See C++14 §20.10.6, type relations</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> template <typename _Tp, typename _Up></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  constexpr bool is_same_v = is_same<_Tp, _Up>::value;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> template <typename _Base, typename _Derived></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> template <typename _From, typename _To></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  constexpr bool is_convertible_v = is_convertible<_From, _To>::value;</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> </div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  // 3.3.2, Other type transformations</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  // invocation_type (still unimplemented)</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  // raw_invocation_type (still unimplemented)</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  // invocation_type_t (still unimplemented)</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  // raw_invocation_type_t (still unimplemented)</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> } // namespace fundamentals_v1</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> } // namespace experimental</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> } // namespace std</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> #endif // __cplusplus <= 201103L</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> #endif // _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS</div></div><!-- fragment --></div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="navelem"><a class="el" href="dir_3a83f109ff04170a1f8448445d1bdcba.html">include</a></li><li class="navelem"><a class="el" href="dir_70d4ab3a5261b72adc47eec15b413144.html">experimental</a></li><li class="navelem"><a class="el" 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