libstdc++
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00001 // Variable Templates For Type Traits -*- C++ -*- 00002 00003 // Copyright (C) 2014-2018 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file experimental/type_traits 00026 * This is a TS C++ Library header. 00027 */ 00028 00029 // 00030 // N3932 Variable Templates For Type Traits (Revision 1) 00031 // 00032 00033 #ifndef _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS 00034 #define _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS 1 00035 00036 #pragma GCC system_header 00037 00038 #if __cplusplus >= 201402L 00039 00040 #include <type_traits> 00041 #include <experimental/bits/lfts_config.h> 00042 00043 namespace std _GLIBCXX_VISIBILITY(default) 00044 { 00045 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00046 00047 namespace experimental 00048 { 00049 inline namespace fundamentals_v1 00050 { 00051 #define __cpp_lib_experimental_type_trait_variable_templates 201402 00052 00053 // See C++14 §20.10.4.1, primary type categories 00054 template <typename _Tp> 00055 constexpr bool is_void_v = is_void<_Tp>::value; 00056 template <typename _Tp> 00057 constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value; 00058 template <typename _Tp> 00059 constexpr bool is_integral_v = is_integral<_Tp>::value; 00060 template <typename _Tp> 00061 constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; 00062 template <typename _Tp> 00063 constexpr bool is_array_v = is_array<_Tp>::value; 00064 template <typename _Tp> 00065 constexpr bool is_pointer_v = is_pointer<_Tp>::value; 00066 template <typename _Tp> 00067 constexpr bool is_lvalue_reference_v = is_lvalue_reference<_Tp>::value; 00068 template <typename _Tp> 00069 constexpr bool is_rvalue_reference_v = is_rvalue_reference<_Tp>::value; 00070 template <typename _Tp> 00071 constexpr bool is_member_object_pointer_v = 00072 is_member_object_pointer<_Tp>::value; 00073 template <typename _Tp> 00074 constexpr bool is_member_function_pointer_v = 00075 is_member_function_pointer<_Tp>::value; 00076 template <typename _Tp> 00077 constexpr bool is_enum_v = is_enum<_Tp>::value; 00078 template <typename _Tp> 00079 constexpr bool is_union_v = is_union<_Tp>::value; 00080 template <typename _Tp> 00081 constexpr bool is_class_v = is_class<_Tp>::value; 00082 template <typename _Tp> 00083 constexpr bool is_function_v = is_function<_Tp>::value; 00084 00085 // See C++14 §20.10.4.2, composite type categories 00086 template <typename _Tp> 00087 constexpr bool is_reference_v = is_reference<_Tp>::value; 00088 template <typename _Tp> 00089 constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; 00090 template <typename _Tp> 00091 constexpr bool is_fundamental_v = is_fundamental<_Tp>::value; 00092 template <typename _Tp> 00093 constexpr bool is_object_v = is_object<_Tp>::value; 00094 template <typename _Tp> 00095 constexpr bool is_scalar_v = is_scalar<_Tp>::value; 00096 template <typename _Tp> 00097 constexpr bool is_compound_v = is_compound<_Tp>::value; 00098 template <typename _Tp> 00099 constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; 00100 00101 // See C++14 §20.10.4.3, type properties 00102 template <typename _Tp> 00103 constexpr bool is_const_v = is_const<_Tp>::value; 00104 template <typename _Tp> 00105 constexpr bool is_volatile_v = is_volatile<_Tp>::value; 00106 template <typename _Tp> 00107 constexpr bool is_trivial_v = is_trivial<_Tp>::value; 00108 template <typename _Tp> 00109 constexpr bool is_trivially_copyable_v = is_trivially_copyable<_Tp>::value; 00110 template <typename _Tp> 00111 constexpr bool is_standard_layout_v = is_standard_layout<_Tp>::value; 00112 template <typename _Tp> 00113 constexpr bool is_pod_v = is_pod<_Tp>::value; 00114 template <typename _Tp> 00115 constexpr bool is_literal_type_v = is_literal_type<_Tp>::value; 00116 template <typename _Tp> 00117 constexpr bool is_empty_v = is_empty<_Tp>::value; 00118 template <typename _Tp> 00119 constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value; 00120 template <typename _Tp> 00121 constexpr bool is_abstract_v = is_abstract<_Tp>::value; 00122 template <typename _Tp> 00123 constexpr bool is_final_v = is_final<_Tp>::value; 00124 template <typename _Tp> 00125 constexpr bool is_signed_v = is_signed<_Tp>::value; 00126 template <typename _Tp> 00127 constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; 00128 template <typename _Tp, typename... _Args> 00129 constexpr bool is_constructible_v = is_constructible<_Tp, _Args...>::value; 00130 template <typename _Tp> 00131 constexpr bool is_default_constructible_v = 00132 is_default_constructible<_Tp>::value; 00133 template <typename _Tp> 00134 constexpr bool is_copy_constructible_v = is_copy_constructible<_Tp>::value; 00135 template <typename _Tp> 00136 constexpr bool is_move_constructible_v = is_move_constructible<_Tp>::value; 00137 template <typename _Tp, typename _Up> 00138 constexpr bool is_assignable_v = is_assignable<_Tp, _Up>::value; 00139 template <typename _Tp> 00140 constexpr bool is_copy_assignable_v = is_copy_assignable<_Tp>::value; 00141 template <typename _Tp> 00142 constexpr bool is_move_assignable_v = is_move_assignable<_Tp>::value; 00143 template <typename _Tp> 00144 constexpr bool is_destructible_v = is_destructible<_Tp>::value; 00145 template <typename _Tp, typename... _Args> 00146 constexpr bool is_trivially_constructible_v = 00147 is_trivially_constructible<_Tp, _Args...>::value; 00148 template <typename _Tp> 00149 constexpr bool is_trivially_default_constructible_v = 00150 is_trivially_default_constructible<_Tp>::value; 00151 template <typename _Tp> 00152 constexpr bool is_trivially_copy_constructible_v = 00153 is_trivially_copy_constructible<_Tp>::value; 00154 template <typename _Tp> 00155 constexpr bool is_trivially_move_constructible_v = 00156 is_trivially_move_constructible<_Tp>::value; 00157 template <typename _Tp, typename _Up> 00158 constexpr bool is_trivially_assignable_v = 00159 is_trivially_assignable<_Tp, _Up>::value; 00160 template <typename _Tp> 00161 constexpr bool is_trivially_copy_assignable_v = 00162 is_trivially_copy_assignable<_Tp>::value; 00163 template <typename _Tp> 00164 constexpr bool is_trivially_move_assignable_v = 00165 is_trivially_move_assignable<_Tp>::value; 00166 template <typename _Tp> 00167 constexpr bool is_trivially_destructible_v = 00168 is_trivially_destructible<_Tp>::value; 00169 template <typename _Tp, typename... _Args> 00170 constexpr bool is_nothrow_constructible_v = 00171 is_nothrow_constructible<_Tp, _Args...>::value; 00172 template <typename _Tp> 00173 constexpr bool is_nothrow_default_constructible_v = 00174 is_nothrow_default_constructible<_Tp>::value; 00175 template <typename _Tp> 00176 constexpr bool is_nothrow_copy_constructible_v = 00177 is_nothrow_copy_constructible<_Tp>::value; 00178 template <typename _Tp> 00179 constexpr bool is_nothrow_move_constructible_v = 00180 is_nothrow_move_constructible<_Tp>::value; 00181 template <typename _Tp, typename _Up> 00182 constexpr bool is_nothrow_assignable_v = 00183 is_nothrow_assignable<_Tp, _Up>::value; 00184 template <typename _Tp> 00185 constexpr bool is_nothrow_copy_assignable_v = 00186 is_nothrow_copy_assignable<_Tp>::value; 00187 template <typename _Tp> 00188 constexpr bool is_nothrow_move_assignable_v = 00189 is_nothrow_move_assignable<_Tp>::value; 00190 template <typename _Tp> 00191 constexpr bool is_nothrow_destructible_v = 00192 is_nothrow_destructible<_Tp>::value; 00193 template <typename _Tp> 00194 constexpr bool has_virtual_destructor_v = 00195 has_virtual_destructor<_Tp>::value; 00196 00197 // See C++14 §20.10.5, type property queries 00198 template <typename _Tp> 00199 constexpr size_t alignment_of_v = alignment_of<_Tp>::value; 00200 template <typename _Tp> 00201 constexpr size_t rank_v = rank<_Tp>::value; 00202 template <typename _Tp, unsigned _Idx = 0> 00203 constexpr size_t extent_v = extent<_Tp, _Idx>::value; 00204 00205 // See C++14 §20.10.6, type relations 00206 template <typename _Tp, typename _Up> 00207 constexpr bool is_same_v = is_same<_Tp, _Up>::value; 00208 template <typename _Base, typename _Derived> 00209 constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; 00210 template <typename _From, typename _To> 00211 constexpr bool is_convertible_v = is_convertible<_From, _To>::value; 00212 00213 00214 // 3.3.2, Other type transformations 00215 // invocation_type (still unimplemented) 00216 // raw_invocation_type (still unimplemented) 00217 // invocation_type_t (still unimplemented) 00218 // raw_invocation_type_t (still unimplemented) 00219 } // namespace fundamentals_v1 00220 00221 inline namespace fundamentals_v2 00222 { 00223 #define __cpp_lib_experimental_detect 201505 00224 00225 // [meta.detect] 00226 00227 template<typename...> using void_t = void; 00228 00229 struct nonesuch 00230 { 00231 nonesuch() = delete; 00232 ~nonesuch() = delete; 00233 nonesuch(nonesuch const&) = delete; 00234 void operator=(nonesuch const&) = delete; 00235 }; 00236 00237 template<template<typename...> class _Op, typename... _Args> 00238 using is_detected 00239 = typename std::__detector<nonesuch, void, _Op, _Args...>::value_t; 00240 00241 template<template<typename...> class _Op, typename... _Args> 00242 constexpr bool is_detected_v = is_detected<_Op, _Args...>::value; 00243 00244 template<template<typename...> class _Op, typename... _Args> 00245 using detected_t 00246 = typename std::__detector<nonesuch, void, _Op, _Args...>::type; 00247 00248 template<typename _Default, template<typename...> class _Op, typename... _Args> 00249 using detected_or = std::__detected_or<_Default, _Op, _Args...>; 00250 00251 template<typename _Default, template<typename...> class _Op, typename... _Args> 00252 using detected_or_t = typename detected_or<_Default, _Op, _Args...>::type; 00253 00254 template<typename Expected, template<typename...> class _Op, typename... _Args> 00255 using is_detected_exact = is_same<Expected, detected_t<_Op, _Args...>>; 00256 00257 template<typename Expected, template<typename...> class _Op, typename... _Args> 00258 constexpr bool is_detected_exact_v 00259 = is_detected_exact<Expected, _Op, _Args...>::value; 00260 00261 template<typename _To, template<typename...> class _Op, typename... _Args> 00262 using is_detected_convertible 00263 = is_convertible<detected_t<_Op, _Args...>, _To>; 00264 00265 template<typename _To, template<typename...> class _Op, typename... _Args> 00266 constexpr bool is_detected_convertible_v 00267 = is_detected_convertible<_To, _Op, _Args...>::value; 00268 00269 #define __cpp_lib_experimental_logical_traits 201511 00270 00271 template<typename... _Bn> 00272 struct conjunction 00273 : __and_<_Bn...> 00274 { }; 00275 00276 template<typename... _Bn> 00277 struct disjunction 00278 : __or_<_Bn...> 00279 { }; 00280 00281 template<typename _Pp> 00282 struct negation 00283 : __not_<_Pp> 00284 { }; 00285 00286 template<typename... _Bn> 00287 constexpr bool conjunction_v 00288 = conjunction<_Bn...>::value; 00289 00290 template<typename... _Bn> 00291 constexpr bool disjunction_v 00292 = disjunction<_Bn...>::value; 00293 00294 template<typename _Pp> 00295 constexpr bool negation_v 00296 = negation<_Pp>::value; 00297 } // namespace fundamentals_v2 00298 } // namespace experimental 00299 00300 _GLIBCXX_END_NAMESPACE_VERSION 00301 } // namespace std 00302 00303 #endif // __cplusplus <= 201103L 00304 00305 #endif // _GLIBCXX_EXPERIMENTAL_TYPE_TRAITS