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<a href="a17211.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">// Variable Templates For Type Traits -*- 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) 2014-2018 Free Software Foundation, Inc.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// This file is part of the GNU ISO C++ Library. This library is free</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// software; you can redistribute it and/or modify it under the</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// terms of the GNU General Public License as published by the</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Free Software Foundation; either version 3, or (at your option)</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// any later version.</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// This library is distributed in the hope that it will be useful,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// GNU General Public License for more details.</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// Under Section 7 of GPL version 3, you are granted additional</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// permissions described in the GCC Runtime Library Exception, version</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">// 3.1, as published by the Free Software Foundation.</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// You should have received a copy of the GNU General Public License and</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// a copy of the GCC Runtime Library Exception along with this program;</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// <http://www.gnu.org/licenses/>.</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/** @file experimental/type_traits</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * This is a TS C++ Library header.</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">//</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">// N3932 Variable Templates For Type Traits (Revision 1)</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">//</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#ifndef _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#define _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS 1</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#pragma GCC system_header</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#if __cplusplus >= 201402L</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <<a class="code" href="a17211.html">type_traits</a>></span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <<a class="code" href="a00995.html">experimental/bits/lfts_config.h</a>></span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">namespace </span><a class="code" href="a01538.html">std</a> _GLIBCXX_VISIBILITY(default)</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> _GLIBCXX_BEGIN_NAMESPACE_VERSION</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>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> <span class="keyword">inline</span> <span class="keyword">namespace </span>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> <span class="preprocessor">#define __cpp_lib_experimental_type_trait_variable_templates 201402</span></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> <span class="comment">// See C++14 §20.10.4.1, primary type categories</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  constexpr <span class="keywordtype">bool</span> is_void_v = is_void<_Tp>::value;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  constexpr <span class="keywordtype">bool</span> is_null_pointer_v = is_null_pointer<_Tp>::value;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  constexpr <span class="keywordtype">bool</span> is_integral_v = is_integral<_Tp>::value;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  constexpr <span class="keywordtype">bool</span> is_floating_point_v = is_floating_point<_Tp>::value;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  constexpr <span class="keywordtype">bool</span> is_array_v = is_array<_Tp>::value;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  constexpr <span class="keywordtype">bool</span> is_pointer_v = is_pointer<_Tp>::value;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  constexpr <span class="keywordtype">bool</span> is_lvalue_reference_v = is_lvalue_reference<_Tp>::value;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  constexpr <span class="keywordtype">bool</span> is_rvalue_reference_v = is_rvalue_reference<_Tp>::value;</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"> 71</span>  constexpr <span class="keywordtype">bool</span> is_member_object_pointer_v =</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  is_member_object_pointer<_Tp>::value;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  constexpr <span class="keywordtype">bool</span> is_member_function_pointer_v =</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  is_member_function_pointer<_Tp>::value;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  constexpr <span class="keywordtype">bool</span> is_enum_v = is_enum<_Tp>::value;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  constexpr <span class="keywordtype">bool</span> is_union_v = is_union<_Tp>::value;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  constexpr <span class="keywordtype">bool</span> is_class_v = is_class<_Tp>::value;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  constexpr <span class="keywordtype">bool</span> is_function_v = is_function<_Tp>::value;</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="comment">// See C++14 §20.10.4.2, composite type categories</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  constexpr <span class="keywordtype">bool</span> is_reference_v = is_reference<_Tp>::value;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  constexpr <span class="keywordtype">bool</span> is_arithmetic_v = is_arithmetic<_Tp>::value;</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>  constexpr <span class="keywordtype">bool</span> is_fundamental_v = is_fundamental<_Tp>::value;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  constexpr <span class="keywordtype">bool</span> is_object_v = is_object<_Tp>::value;</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  constexpr <span class="keywordtype">bool</span> is_scalar_v = is_scalar<_Tp>::value;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  constexpr <span class="keywordtype">bool</span> is_compound_v = is_compound<_Tp>::value;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  constexpr <span class="keywordtype">bool</span> is_member_pointer_v = is_member_pointer<_Tp>::value;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// See C++14 §20.10.4.3, type properties</span></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  constexpr <span class="keywordtype">bool</span> is_const_v = is_const<_Tp>::value;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  constexpr <span class="keywordtype">bool</span> is_volatile_v = is_volatile<_Tp>::value;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  constexpr <span class="keywordtype">bool</span> is_trivial_v = is_trivial<_Tp>::value;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  constexpr <span class="keywordtype">bool</span> is_trivially_copyable_v = is_trivially_copyable<_Tp>::value;</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  constexpr <span class="keywordtype">bool</span> is_standard_layout_v = is_standard_layout<_Tp>::value;</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  constexpr <span class="keywordtype">bool</span> is_pod_v = is_pod<_Tp>::value;</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>  constexpr <span class="keywordtype">bool</span> is_literal_type_v = is_literal_type<_Tp>::value;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  constexpr <span class="keywordtype">bool</span> is_empty_v = is_empty<_Tp>::value;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  constexpr <span class="keywordtype">bool</span> is_polymorphic_v = is_polymorphic<_Tp>::value;</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  constexpr <span class="keywordtype">bool</span> is_abstract_v = is_abstract<_Tp>::value;</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>  constexpr <span class="keywordtype">bool</span> is_final_v = is_final<_Tp>::value;</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  constexpr <span class="keywordtype">bool</span> is_signed_v = is_signed<_Tp>::value;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  constexpr <span class="keywordtype">bool</span> is_unsigned_v = is_unsigned<_Tp>::value;</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  constexpr <span class="keywordtype">bool</span> is_constructible_v = is_constructible<_Tp, _Args...>::value;</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  constexpr <span class="keywordtype">bool</span> is_default_constructible_v =</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  is_default_constructible<_Tp>::value;</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  constexpr <span class="keywordtype">bool</span> is_copy_constructible_v = is_copy_constructible<_Tp>::value;</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  constexpr <span class="keywordtype">bool</span> is_move_constructible_v = is_move_constructible<_Tp>::value;</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  constexpr <span class="keywordtype">bool</span> is_assignable_v = is_assignable<_Tp, _Up>::value;</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  constexpr <span class="keywordtype">bool</span> is_copy_assignable_v = is_copy_assignable<_Tp>::value;</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  constexpr <span class="keywordtype">bool</span> is_move_assignable_v = is_move_assignable<_Tp>::value;</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  constexpr <span class="keywordtype">bool</span> is_destructible_v = is_destructible<_Tp>::value;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  constexpr <span class="keywordtype">bool</span> is_trivially_constructible_v =</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  is_trivially_constructible<_Tp, _Args...>::value;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  constexpr <span class="keywordtype">bool</span> is_trivially_default_constructible_v =</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  is_trivially_default_constructible<_Tp>::value;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  constexpr <span class="keywordtype">bool</span> is_trivially_copy_constructible_v =</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  is_trivially_copy_constructible<_Tp>::value;</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  constexpr <span class="keywordtype">bool</span> is_trivially_move_constructible_v =</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  is_trivially_move_constructible<_Tp>::value;</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  constexpr <span class="keywordtype">bool</span> is_trivially_assignable_v =</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  is_trivially_assignable<_Tp, _Up>::value;</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  constexpr <span class="keywordtype">bool</span> is_trivially_copy_assignable_v =</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  is_trivially_copy_assignable<_Tp>::value;</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  constexpr <span class="keywordtype">bool</span> is_trivially_move_assignable_v =</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  is_trivially_move_assignable<_Tp>::value;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  constexpr <span class="keywordtype">bool</span> is_trivially_destructible_v =</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  is_trivially_destructible<_Tp>::value;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  constexpr <span class="keywordtype">bool</span> is_nothrow_constructible_v =</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  is_nothrow_constructible<_Tp, _Args...>::value;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  constexpr <span class="keywordtype">bool</span> is_nothrow_default_constructible_v =</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  is_nothrow_default_constructible<_Tp>::value;</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  constexpr <span class="keywordtype">bool</span> is_nothrow_copy_constructible_v =</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  is_nothrow_copy_constructible<_Tp>::value;</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  constexpr <span class="keywordtype">bool</span> is_nothrow_move_constructible_v =</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  is_nothrow_move_constructible<_Tp>::value;</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  constexpr <span class="keywordtype">bool</span> is_nothrow_assignable_v =</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  is_nothrow_assignable<_Tp, _Up>::value;</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  constexpr <span class="keywordtype">bool</span> is_nothrow_copy_assignable_v =</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  is_nothrow_copy_assignable<_Tp>::value;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  constexpr <span class="keywordtype">bool</span> is_nothrow_move_assignable_v =</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  is_nothrow_move_assignable<_Tp>::value;</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  constexpr <span class="keywordtype">bool</span> is_nothrow_destructible_v =</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  is_nothrow_destructible<_Tp>::value;</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  constexpr <span class="keywordtype">bool</span> has_virtual_destructor_v =</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  has_virtual_destructor<_Tp>::value;</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment">// See C++14 §20.10.5, type property queries</span></div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  constexpr <span class="keywordtype">size_t</span> alignment_of_v = alignment_of<_Tp>::value;</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  constexpr <span class="keywordtype">size_t</span> rank_v = rank<_Tp>::value;</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keywordtype">unsigned</span> _Idx = 0></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  constexpr <span class="keywordtype">size_t</span> extent_v = extent<_Tp, _Idx>::value;</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> </div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment">// See C++14 §20.10.6, type relations</span></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Tp, <span class="keyword">typename</span> _Up></div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  constexpr <span class="keywordtype">bool</span> is_same_v = is_same<_Tp, _Up>::value;</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _Base, <span class="keyword">typename</span> _Derived></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  constexpr <span class="keywordtype">bool</span> is_base_of_v = is_base_of<_Base, _Derived>::value;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="keyword">template</span> <<span class="keyword">typename</span> _From, <span class="keyword">typename</span> _To></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  constexpr <span class="keywordtype">bool</span> is_convertible_v = is_convertible<_From, _To>::value;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="comment">// 3.3.2, Other type transformations</span></div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="comment">// invocation_type (still unimplemented)</span></div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">// raw_invocation_type (still unimplemented)</span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="comment">// invocation_type_t (still unimplemented)</span></div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">// raw_invocation_type_t (still unimplemented)</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> } <span class="comment">// namespace fundamentals_v1</span></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="keyword">inline</span> <span class="keyword">namespace </span>fundamentals_v2</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> {</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="preprocessor">#define __cpp_lib_experimental_detect 201505</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> </div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment">// [meta.detect]</span></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>...> <span class="keyword">using</span> <a class="code" href="a01476.html#ga22cbeb48987e9b7ee87a626eb5f1d6dc">void_t</a> = void;</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="keyword">struct </span>nonesuch</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> {</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  nonesuch() = <span class="keyword">delete</span>;</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  ~nonesuch() = <span class="keyword">delete</span>;</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  nonesuch(nonesuch <span class="keyword">const</span>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordtype">void</span> operator=(nonesuch <span class="keyword">const</span>&) = <span class="keyword">delete</span>;</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> };</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="keyword">template</span><<span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keyword">using</span> is_detected</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  = <span class="keyword">typename</span> <a class="code" href="a04388.html">std::__detector</a><nonesuch, void, _Op, _Args...>::value_t;</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="keyword">template</span><<span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  constexpr <span class="keywordtype">bool</span> is_detected_v = is_detected<_Op, _Args...>::value;</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> </div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="keyword">template</span><<span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keyword">using</span> detected_t</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  = <span class="keyword">typename</span> <a class="code" href="a04388.html">std::__detector</a><nonesuch, void, _Op, _Args...>::type;</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="keyword">template</span><<span class="keyword">typename</span> _Default, <span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keyword">using</span> detected_or = <a class="code" href="a04388.html">std::__detected_or</a><_Default, _Op, _Args...>;</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> <span class="keyword">template</span><<span class="keyword">typename</span> _Default, <span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keyword">using</span> detected_or_t = <span class="keyword">typename</span> detected_or<_Default, _Op, _Args...>::type;</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> <span class="keyword">template</span><<span class="keyword">typename</span> _Expected, <span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keyword">using</span> is_detected_exact = is_same<_Expected, detected_t<_Op, _Args...>>;</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="keyword">template</span><<span class="keyword">typename</span> _Expected, <span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  constexpr <span class="keywordtype">bool</span> is_detected_exact_v</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  = is_detected_exact<_Expected, _Op, _Args...>::value;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="keyword">template</span><<span class="keyword">typename</span> _To, <span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keyword">using</span> is_detected_convertible</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  = is_convertible<detected_t<_Op, _Args...>, _To>;</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> <span class="keyword">template</span><<span class="keyword">typename</span> _To, <span class="keyword">template</span><<span class="keyword">typename</span>...> <span class="keyword">class </span>_Op, <span class="keyword">typename</span>... _Args></div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  constexpr <span class="keywordtype">bool</span> is_detected_convertible_v</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  = is_detected_convertible<_To, _Op, _Args...>::value;</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="preprocessor">#define __cpp_lib_experimental_logical_traits 201511</span></div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="keyword">template</span><<span class="keyword">typename</span>... _Bn></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keyword">struct </span>conjunction</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  : __and_<_Bn...></div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  { };</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="keyword">template</span><<span class="keyword">typename</span>... _Bn></div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keyword">struct </span>disjunction</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  : __or_<_Bn...></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  { };</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="keyword">template</span><<span class="keyword">typename</span> _Pp></div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keyword">struct </span>negation</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  : __not_<_Pp></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> <span class="keyword">template</span><<span class="keyword">typename</span>... _Bn></div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  constexpr <span class="keywordtype">bool</span> conjunction_v</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  = conjunction<_Bn...>::value;</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="keyword">template</span><<span class="keyword">typename</span>... _Bn></div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  constexpr <span class="keywordtype">bool</span> disjunction_v</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  = disjunction<_Bn...>::value;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> </div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="keyword">template</span><<span class="keyword">typename</span> _Pp></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  constexpr <span class="keywordtype">bool</span> negation_v</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  = negation<_Pp>::value;</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span> } <span class="comment">// namespace fundamentals_v2</span></div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span> } <span class="comment">// namespace experimental</span></div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span> </div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> } <span class="comment">// namespace std</span></div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span> </div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="preprocessor">#endif // __cplusplus <= 201103L</span></div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> </div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="preprocessor">#endif // _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS</span></div><div class="ttc" id="a17211_html"><div class="ttname"><a href="a17211.html">type_traits</a></div></div>
<div class="ttc" id="a01476_html_ga22cbeb48987e9b7ee87a626eb5f1d6dc"><div class="ttname"><a href="a01476.html#ga22cbeb48987e9b7ee87a626eb5f1d6dc">std::void_t</a></div><div class="ttdeci">void void_t</div><div class="ttdoc">A metafunction that always yields void, used for detecting valid types.</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l02323">type_traits:2323</a></div></div>
<div class="ttc" id="a04388_html"><div class="ttname"><a href="a04388.html">std::__detector</a></div><div class="ttdoc">Implementation of the detection idiom (negative case).</div><div class="ttdef"><b>Definition:</b> <a href="a00167_source.html#l02329">type_traits:2329</a></div></div>
<div class="ttc" id="a00995_html"><div class="ttname"><a href="a00995.html">lfts_config.h</a></div></div>
<div class="ttc" id="a01538_html"><div class="ttname"><a href="a01538.html">std</a></div><div class="ttdoc">ISO C++ entities toplevel namespace is std.</div></div>
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