29#ifndef _GLIBCXX_TYPE_TRAITS
30#define _GLIBCXX_TYPE_TRAITS 1
32#pragma GCC system_header
34#if __cplusplus < 201103L
40#define __glibcxx_want_bool_constant
41#define __glibcxx_want_bounded_array_traits
42#define __glibcxx_want_has_unique_object_representations
43#define __glibcxx_want_integral_constant_callable
44#define __glibcxx_want_is_aggregate
45#define __glibcxx_want_is_constant_evaluated
46#define __glibcxx_want_is_final
47#define __glibcxx_want_is_invocable
48#define __glibcxx_want_is_layout_compatible
49#define __glibcxx_want_is_nothrow_convertible
50#define __glibcxx_want_is_null_pointer
51#define __glibcxx_want_is_pointer_interconvertible
52#define __glibcxx_want_is_scoped_enum
53#define __glibcxx_want_is_swappable
54#define __glibcxx_want_logical_traits
55#define __glibcxx_want_reference_from_temporary
56#define __glibcxx_want_remove_cvref
57#define __glibcxx_want_result_of_sfinae
58#define __glibcxx_want_transformation_trait_aliases
59#define __glibcxx_want_type_identity
60#define __glibcxx_want_type_trait_variable_templates
61#define __glibcxx_want_unwrap_ref
62#define __glibcxx_want_void_t
65namespace std _GLIBCXX_VISIBILITY(default)
67_GLIBCXX_BEGIN_NAMESPACE_VERSION
69 template<
typename _Tp>
70 class reference_wrapper;
86 template<
typename _Tp, _Tp __v>
89 static constexpr _Tp value = __v;
90 using value_type = _Tp;
92 constexpr operator value_type()
const noexcept {
return value; }
94#ifdef __cpp_lib_integral_constant_callable
95 constexpr value_type operator()()
const noexcept {
return value; }
99#if ! __cpp_inline_variables
100 template<
typename _Tp, _Tp __v>
116#ifdef __cpp_lib_bool_constant
120 using bool_constant = __bool_constant<__v>;
127 template<
bool,
typename _Tp =
void>
132 template<
typename _Tp>
134 {
using type = _Tp; };
137 template<
bool _Cond,
typename _Tp =
void>
138 using __enable_if_t =
typename enable_if<_Cond, _Tp>::type;
143 template<
typename _Tp,
typename>
148 struct __conditional<false>
150 template<
typename,
typename _Up>
155 template<
bool _Cond,
typename _If,
typename _Else>
156 using __conditional_t
157 =
typename __conditional<_Cond>::template type<_If, _Else>;
160 template <
typename _Type>
161 struct __type_identity
162 {
using type = _Type; };
164 template<
typename _Tp>
165 using __type_identity_t =
typename __type_identity<_Tp>::type;
170 template<
typename _Tp,
typename...>
171 using __first_t = _Tp;
174 template<
typename... _Bn>
176 __enable_if_t<!bool(_Bn::value)>...>;
178 template<
typename... _Bn>
181 template<
typename... _Bn>
182 auto __and_fn(
int) -> __first_t<
true_type,
183 __enable_if_t<bool(_Bn::value)>...>;
185 template<
typename... _Bn>
192 template<
typename... _Bn>
194 : decltype(__detail::__or_fn<_Bn...>(0))
197 template<
typename... _Bn>
199 : decltype(__detail::__and_fn<_Bn...>(0))
202 template<
typename _Pp>
204 : __bool_constant<!bool(_Pp::value)>
208#ifdef __cpp_lib_logical_traits
211 template<
typename... _Bn>
212 inline constexpr bool __or_v = __or_<_Bn...>::value;
213 template<
typename... _Bn>
214 inline constexpr bool __and_v = __and_<_Bn...>::value;
218 template<
typename ,
typename _B1,
typename... _Bn>
219 struct __disjunction_impl
220 {
using type = _B1; };
222 template<
typename _B1,
typename _B2,
typename... _Bn>
223 struct __disjunction_impl<__enable_if_t<!bool(_B1::value)>, _B1, _B2, _Bn...>
224 {
using type =
typename __disjunction_impl<void, _B2, _Bn...>::type; };
226 template<
typename ,
typename _B1,
typename... _Bn>
227 struct __conjunction_impl
228 {
using type = _B1; };
230 template<
typename _B1,
typename _B2,
typename... _Bn>
231 struct __conjunction_impl<__enable_if_t<bool(_B1::value)>, _B1, _B2, _Bn...>
232 {
using type =
typename __conjunction_impl<void, _B2, _Bn...>::type; };
236 template<
typename... _Bn>
238 : __detail::__conjunction_impl<void, _Bn...>::type
246 template<
typename... _Bn>
248 : __detail::__disjunction_impl<void, _Bn...>::type
256 template<
typename _Pp>
264 template<
typename... _Bn>
265 inline constexpr bool conjunction_v = conjunction<_Bn...>::value;
267 template<
typename... _Bn>
268 inline constexpr bool disjunction_v = disjunction<_Bn...>::value;
270 template<
typename _Pp>
271 inline constexpr bool negation_v = negation<_Pp>::value;
290 struct __is_array_unknown_bounds;
295 template <
typename _Tp,
size_t = sizeof(_Tp)>
296 constexpr true_type __is_complete_or_unbounded(__type_identity<_Tp>)
299 template <
typename _TypeIdentity,
300 typename _NestedType =
typename _TypeIdentity::type>
301 constexpr typename __or_<
302 is_reference<_NestedType>,
303 is_function<_NestedType>,
304 is_void<_NestedType>,
305 __is_array_unknown_bounds<_NestedType>
306 >::type __is_complete_or_unbounded(_TypeIdentity)
310 template<
typename _Tp>
311 using __remove_cv_t =
typename remove_cv<_Tp>::type;
317 template<
typename _Tp>
326 struct is_void<const void>
330 struct is_void<volatile void>
334 struct is_void<const volatile void>
339 struct __is_integral_helper
343 struct __is_integral_helper<bool>
347 struct __is_integral_helper<char>
351 struct __is_integral_helper<signed char>
355 struct __is_integral_helper<unsigned char>
362 struct __is_integral_helper<wchar_t>
365#ifdef _GLIBCXX_USE_CHAR8_T
367 struct __is_integral_helper<char8_t>
372 struct __is_integral_helper<char16_t>
376 struct __is_integral_helper<char32_t>
380 struct __is_integral_helper<short>
384 struct __is_integral_helper<unsigned short>
388 struct __is_integral_helper<int>
392 struct __is_integral_helper<unsigned int>
396 struct __is_integral_helper<long>
400 struct __is_integral_helper<unsigned long>
404 struct __is_integral_helper<long long>
408 struct __is_integral_helper<unsigned long long>
413#if defined(__GLIBCXX_TYPE_INT_N_0)
416 struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_0>
421 struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_0>
424#if defined(__GLIBCXX_TYPE_INT_N_1)
427 struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_1>
432 struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_1>
435#if defined(__GLIBCXX_TYPE_INT_N_2)
438 struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_2>
443 struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_2>
446#if defined(__GLIBCXX_TYPE_INT_N_3)
449 struct __is_integral_helper<__GLIBCXX_TYPE_INT_N_3>
454 struct __is_integral_helper<unsigned __GLIBCXX_TYPE_INT_N_3>
460 template<
typename _Tp>
462 :
public __is_integral_helper<__remove_cv_t<_Tp>>::type
467 struct __is_floating_point_helper
471 struct __is_floating_point_helper<float>
475 struct __is_floating_point_helper<double>
479 struct __is_floating_point_helper<long double>
482#ifdef __STDCPP_FLOAT16_T__
484 struct __is_floating_point_helper<_Float16>
488#ifdef __STDCPP_FLOAT32_T__
490 struct __is_floating_point_helper<_Float32>
494#ifdef __STDCPP_FLOAT64_T__
496 struct __is_floating_point_helper<_Float64>
500#ifdef __STDCPP_FLOAT128_T__
502 struct __is_floating_point_helper<_Float128>
506#ifdef __STDCPP_BFLOAT16_T__
508 struct __is_floating_point_helper<
__gnu_cxx::__bfloat16_t>
512#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128) && !defined(__CUDACC__)
514 struct __is_floating_point_helper<__float128>
520 template<
typename _Tp>
522 :
public __is_floating_point_helper<__remove_cv_t<_Tp>>::type
526#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_array)
527 template<
typename _Tp>
529 :
public __bool_constant<__is_array(_Tp)>
536 template<
typename _Tp, std::
size_t _Size>
540 template<
typename _Tp>
541 struct is_array<_Tp[]>
546 struct __is_pointer_helper
549 template<
typename _Tp>
550 struct __is_pointer_helper<_Tp*>
554 template<
typename _Tp>
556 :
public __is_pointer_helper<__remove_cv_t<_Tp>>::type
564 template<
typename _Tp>
573 template<
typename _Tp>
578#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_object_pointer)
579 template<
typename _Tp>
580 struct is_member_object_pointer
581 :
public __bool_constant<__is_member_object_pointer(_Tp)>
588 template<
typename _Tp,
typename _Cp>
590 :
public __not_<is_function<_Tp>>::type { };
593 template<
typename _Tp>
594 struct is_member_object_pointer
595 :
public __is_member_object_pointer_helper<__remove_cv_t<_Tp>>::type
599#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_function_pointer)
601 template<
typename _Tp>
602 struct is_member_function_pointer
603 :
public __bool_constant<__is_member_function_pointer(_Tp)>
607 struct __is_member_function_pointer_helper
610 template<
typename _Tp,
typename _Cp>
611 struct __is_member_function_pointer_helper<_Tp _Cp::*>
612 :
public is_function<_Tp>::type { };
615 template<
typename _Tp>
617 :
public __is_member_function_pointer_helper<__remove_cv_t<_Tp>>::type
622 template<
typename _Tp>
624 :
public __bool_constant<__is_enum(_Tp)>
628 template<
typename _Tp>
630 :
public __bool_constant<__is_union(_Tp)>
634 template<
typename _Tp>
636 :
public __bool_constant<__is_class(_Tp)>
640#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_function)
641 template<
typename _Tp>
643 :
public __bool_constant<__is_function(_Tp)>
646 template<
typename _Tp>
648 :
public __bool_constant<!is_const<const _Tp>::value> { };
650 template<
typename _Tp>
654 template<
typename _Tp>
655 struct is_function<_Tp&&>
659#ifdef __cpp_lib_is_null_pointer
661 template<typename _Tp>
662 struct is_null_pointer
666 struct is_null_pointer<
std::nullptr_t>
670 struct is_null_pointer<const
std::nullptr_t>
674 struct is_null_pointer<volatile
std::nullptr_t>
678 struct is_null_pointer<const volatile
std::nullptr_t>
683 template<
typename _Tp>
684 struct __is_nullptr_t
685 :
public is_null_pointer<_Tp>
686 { } _GLIBCXX_DEPRECATED_SUGGEST(
"std::is_null_pointer");
692#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_reference)
693 template<
typename _Tp>
695 :
public __bool_constant<__is_reference(_Tp)>
698 template<
typename _Tp>
703 template<
typename _Tp>
708 template<
typename _Tp>
709 struct is_reference<_Tp&&>
715 template<
typename _Tp>
717 :
public __or_<is_integral<_Tp>, is_floating_point<_Tp>>::type
721 template<
typename _Tp>
723 :
public __or_<is_arithmetic<_Tp>, is_void<_Tp>,
724 is_null_pointer<_Tp>>::type
728#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_object)
729 template<
typename _Tp>
731 :
public __bool_constant<__is_object(_Tp)>
734 template<
typename _Tp>
736 :
public __not_<__or_<is_function<_Tp>, is_reference<_Tp>,
745 template<
typename _Tp>
747 :
public __or_<is_arithmetic<_Tp>, is_enum<_Tp>, is_pointer<_Tp>,
748 is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type
752 template<
typename _Tp>
754 :
public __bool_constant<!is_fundamental<_Tp>::value> { };
757#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_pointer)
758 template<
typename _Tp>
760 :
public __bool_constant<__is_member_pointer(_Tp)>
764 template<
typename _Tp>
765 struct __is_member_pointer_helper
768 template<
typename _Tp,
typename _Cp>
769 struct __is_member_pointer_helper<_Tp _Cp::*>
773 template<
typename _Tp>
775 :
public __is_member_pointer_helper<__remove_cv_t<_Tp>>::type
779 template<
typename,
typename>
783 template<
typename _Tp,
typename... _Types>
784 using __is_one_of = __or_<is_same<_Tp, _Types>...>;
788 template<
typename _Tp>
789 using __is_signed_integer = __is_one_of<__remove_cv_t<_Tp>,
790 signed char,
signed short,
signed int,
signed long,
792#if defined(__GLIBCXX_TYPE_INT_N_0)
793 ,
signed __GLIBCXX_TYPE_INT_N_0
795#if defined(__GLIBCXX_TYPE_INT_N_1)
796 ,
signed __GLIBCXX_TYPE_INT_N_1
798#if defined(__GLIBCXX_TYPE_INT_N_2)
799 ,
signed __GLIBCXX_TYPE_INT_N_2
801#if defined(__GLIBCXX_TYPE_INT_N_3)
802 ,
signed __GLIBCXX_TYPE_INT_N_3
808 template<
typename _Tp>
809 using __is_unsigned_integer = __is_one_of<__remove_cv_t<_Tp>,
810 unsigned char,
unsigned short,
unsigned int,
unsigned long,
812#if defined(__GLIBCXX_TYPE_INT_N_0)
813 ,
unsigned __GLIBCXX_TYPE_INT_N_0
815#if defined(__GLIBCXX_TYPE_INT_N_1)
816 ,
unsigned __GLIBCXX_TYPE_INT_N_1
818#if defined(__GLIBCXX_TYPE_INT_N_2)
819 ,
unsigned __GLIBCXX_TYPE_INT_N_2
821#if defined(__GLIBCXX_TYPE_INT_N_3)
822 ,
unsigned __GLIBCXX_TYPE_INT_N_3
827 template<
typename _Tp>
828 using __is_standard_integer
829 = __or_<__is_signed_integer<_Tp>, __is_unsigned_integer<_Tp>>;
832 template<
typename...>
using __void_t = void;
842 template<
typename _Tp>
851 template<
typename _Tp>
856 template<
typename _Tp>
858 :
public __bool_constant<__is_trivial(_Tp)>
860 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
861 "template argument must be a complete class or an unbounded array");
865 template<
typename _Tp>
867 :
public __bool_constant<__is_trivially_copyable(_Tp)>
869 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
870 "template argument must be a complete class or an unbounded array");
874 template<
typename _Tp>
876 :
public __bool_constant<__is_standard_layout(_Tp)>
878 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
879 "template argument must be a complete class or an unbounded array");
887 template<
typename _Tp>
889 _GLIBCXX20_DEPRECATED_SUGGEST(
"is_standard_layout && is_trivial")
891 : public __bool_constant<__is_pod(_Tp)>
893 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
894 "template argument must be a complete class or an unbounded array");
901 template<
typename _Tp>
903 _GLIBCXX17_DEPRECATED
905 :
public __bool_constant<__is_literal_type(_Tp)>
907 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
908 "template argument must be a complete class or an unbounded array");
912 template<
typename _Tp>
914 :
public __bool_constant<__is_empty(_Tp)>
918 template<
typename _Tp>
920 :
public __bool_constant<__is_polymorphic(_Tp)>
923#ifdef __cpp_lib_is_final
926 template<typename _Tp>
928 :
public __bool_constant<__is_final(_Tp)>
933 template<
typename _Tp>
935 :
public __bool_constant<__is_abstract(_Tp)>
939 template<
typename _Tp,
941 struct __is_signed_helper
944 template<
typename _Tp>
945 struct __is_signed_helper<_Tp, true>
946 :
public __bool_constant<_Tp(-1) < _Tp(0)>
951 template<typename _Tp>
953 : public __is_signed_helper<_Tp>::type
957 template<typename _Tp>
959 : public __and_<is_arithmetic<_Tp>, __not_<is_signed<_Tp>>>::type
963 template<typename _Tp, typename _Up = _Tp&&>
967 template<typename _Tp>
972 template<typename _Tp>
973 auto declval() noexcept -> decltype(__declval<_Tp>(0));
979 template<typename _Tp>
980 struct __is_array_known_bounds
984 template<
typename _Tp,
size_t _Size>
985 struct __is_array_known_bounds<_Tp[_Size]>
989 template<
typename _Tp>
990 struct __is_array_unknown_bounds
994 template<
typename _Tp>
995 struct __is_array_unknown_bounds<_Tp[]>
1006 struct __do_is_destructible_impl
1008 template<typename _Tp, typename = decltype(declval<_Tp&>().~_Tp())>
1009 static true_type __test(
int);
1015 template<
typename _Tp>
1016 struct __is_destructible_impl
1017 :
public __do_is_destructible_impl
1019 using type =
decltype(__test<_Tp>(0));
1022 template<
typename _Tp,
1023 bool = __or_<is_void<_Tp>,
1024 __is_array_unknown_bounds<_Tp>,
1025 is_function<_Tp>>::value,
1026 bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value>
1027 struct __is_destructible_safe;
1029 template<
typename _Tp>
1030 struct __is_destructible_safe<_Tp, false, false>
1031 :
public __is_destructible_impl<typename
1032 remove_all_extents<_Tp>::type>::type
1035 template<
typename _Tp>
1036 struct __is_destructible_safe<_Tp, true, false>
1039 template<
typename _Tp>
1040 struct __is_destructible_safe<_Tp, false, true>
1045 template<
typename _Tp>
1047 :
public __is_destructible_safe<_Tp>::type
1049 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1050 "template argument must be a complete class or an unbounded array");
1059 struct __do_is_nt_destructible_impl
1061 template<
typename _Tp>
1062 static __bool_constant<noexcept(declval<_Tp&>().~_Tp())>
1069 template<
typename _Tp>
1070 struct __is_nt_destructible_impl
1071 :
public __do_is_nt_destructible_impl
1073 using type =
decltype(__test<_Tp>(0));
1076 template<
typename _Tp,
1077 bool = __or_<is_void<_Tp>,
1078 __is_array_unknown_bounds<_Tp>,
1079 is_function<_Tp>>::value,
1080 bool = __or_<is_reference<_Tp>, is_scalar<_Tp>>::value>
1081 struct __is_nt_destructible_safe;
1083 template<
typename _Tp>
1084 struct __is_nt_destructible_safe<_Tp, false, false>
1085 :
public __is_nt_destructible_impl<typename
1086 remove_all_extents<_Tp>::type>::type
1089 template<
typename _Tp>
1090 struct __is_nt_destructible_safe<_Tp, true, false>
1093 template<
typename _Tp>
1094 struct __is_nt_destructible_safe<_Tp, false, true>
1099 template<
typename _Tp>
1101 :
public __is_nt_destructible_safe<_Tp>::type
1103 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1104 "template argument must be a complete class or an unbounded array");
1108 template<
typename _Tp,
typename... _Args>
1109 using __is_constructible_impl
1110 = __bool_constant<__is_constructible(_Tp, _Args...)>;
1114 template<
typename _Tp,
typename... _Args>
1116 :
public __is_constructible_impl<_Tp, _Args...>
1118 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1119 "template argument must be a complete class or an unbounded array");
1123 template<
typename _Tp>
1125 :
public __is_constructible_impl<_Tp>
1127 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1128 "template argument must be a complete class or an unbounded array");
1132 template<
typename _Tp,
typename =
void>
1133 struct __add_lvalue_reference_helper
1134 {
using type = _Tp; };
1136 template<
typename _Tp>
1137 struct __add_lvalue_reference_helper<_Tp, __void_t<_Tp&>>
1138 {
using type = _Tp&; };
1140 template<
typename _Tp>
1141 using __add_lval_ref_t =
typename __add_lvalue_reference_helper<_Tp>::type;
1145 template<
typename _Tp>
1147 :
public __is_constructible_impl<_Tp, __add_lval_ref_t<const _Tp>>
1149 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1150 "template argument must be a complete class or an unbounded array");
1154 template<
typename _Tp,
typename =
void>
1155 struct __add_rvalue_reference_helper
1156 {
using type = _Tp; };
1158 template<
typename _Tp>
1159 struct __add_rvalue_reference_helper<_Tp, __void_t<_Tp&&>>
1160 {
using type = _Tp&&; };
1162 template<
typename _Tp>
1163 using __add_rval_ref_t =
typename __add_rvalue_reference_helper<_Tp>::type;
1167 template<
typename _Tp>
1169 :
public __is_constructible_impl<_Tp, __add_rval_ref_t<_Tp>>
1171 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1172 "template argument must be a complete class or an unbounded array");
1176 template<
typename _Tp,
typename... _Args>
1177 using __is_nothrow_constructible_impl
1178 = __bool_constant<__is_nothrow_constructible(_Tp, _Args...)>;
1182 template<
typename _Tp,
typename... _Args>
1184 :
public __is_nothrow_constructible_impl<_Tp, _Args...>
1186 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1187 "template argument must be a complete class or an unbounded array");
1191 template<
typename _Tp>
1193 :
public __is_nothrow_constructible_impl<_Tp>
1195 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1196 "template argument must be a complete class or an unbounded array");
1200 template<
typename _Tp>
1202 :
public __is_nothrow_constructible_impl<_Tp, __add_lval_ref_t<const _Tp>>
1204 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1205 "template argument must be a complete class or an unbounded array");
1209 template<
typename _Tp>
1211 :
public __is_nothrow_constructible_impl<_Tp, __add_rval_ref_t<_Tp>>
1213 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1214 "template argument must be a complete class or an unbounded array");
1218 template<
typename _Tp,
typename _Up>
1219 using __is_assignable_impl = __bool_constant<__is_assignable(_Tp, _Up)>;
1223 template<
typename _Tp,
typename _Up>
1225 :
public __is_assignable_impl<_Tp, _Up>
1227 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1228 "template argument must be a complete class or an unbounded array");
1232 template<
typename _Tp>
1234 :
public __is_assignable_impl<__add_lval_ref_t<_Tp>,
1235 __add_lval_ref_t<const _Tp>>
1237 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1238 "template argument must be a complete class or an unbounded array");
1242 template<
typename _Tp>
1244 :
public __is_assignable_impl<__add_lval_ref_t<_Tp>, __add_rval_ref_t<_Tp>>
1246 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1247 "template argument must be a complete class or an unbounded array");
1251 template<
typename _Tp,
typename _Up>
1252 using __is_nothrow_assignable_impl
1253 = __bool_constant<__is_nothrow_assignable(_Tp, _Up)>;
1257 template<
typename _Tp,
typename _Up>
1259 :
public __is_nothrow_assignable_impl<_Tp, _Up>
1261 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1262 "template argument must be a complete class or an unbounded array");
1266 template<
typename _Tp>
1268 :
public __is_nothrow_assignable_impl<__add_lval_ref_t<_Tp>,
1269 __add_lval_ref_t<const _Tp>>
1271 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1272 "template argument must be a complete class or an unbounded array");
1276 template<
typename _Tp>
1278 :
public __is_nothrow_assignable_impl<__add_lval_ref_t<_Tp>,
1279 __add_rval_ref_t<_Tp>>
1281 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1282 "template argument must be a complete class or an unbounded array");
1286 template<
typename _Tp,
typename... _Args>
1287 using __is_trivially_constructible_impl
1288 = __bool_constant<__is_trivially_constructible(_Tp, _Args...)>;
1292 template<
typename _Tp,
typename... _Args>
1294 :
public __is_trivially_constructible_impl<_Tp, _Args...>
1296 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1297 "template argument must be a complete class or an unbounded array");
1301 template<
typename _Tp>
1303 :
public __is_trivially_constructible_impl<_Tp>
1305 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1306 "template argument must be a complete class or an unbounded array");
1309#if __cpp_variable_templates && __cpp_concepts
1310 template<
typename _Tp>
1311 constexpr bool __is_implicitly_default_constructible_v
1312 =
requires (void(&__f)(_Tp)) { __f({}); };
1314 template<
typename _Tp>
1315 struct __is_implicitly_default_constructible
1316 : __bool_constant<__is_implicitly_default_constructible_v<_Tp>>
1319 struct __do_is_implicitly_default_constructible_impl
1321 template <
typename _Tp>
1322 static void __helper(
const _Tp&);
1324 template <
typename _Tp>
1326 decltype(__helper<const _Tp&>({}))* = 0);
1331 template<
typename _Tp>
1332 struct __is_implicitly_default_constructible_impl
1333 :
public __do_is_implicitly_default_constructible_impl
1335 using type =
decltype(__test(declval<_Tp>()));
1338 template<
typename _Tp>
1339 struct __is_implicitly_default_constructible_safe
1340 :
public __is_implicitly_default_constructible_impl<_Tp>::type
1343 template <
typename _Tp>
1344 struct __is_implicitly_default_constructible
1345 :
public __and_<__is_constructible_impl<_Tp>,
1346 __is_implicitly_default_constructible_safe<_Tp>>::type
1351 template<
typename _Tp>
1353 :
public __is_trivially_constructible_impl<_Tp, __add_lval_ref_t<const _Tp>>
1355 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1356 "template argument must be a complete class or an unbounded array");
1360 template<
typename _Tp>
1362 :
public __is_trivially_constructible_impl<_Tp, __add_rval_ref_t<_Tp>>
1364 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1365 "template argument must be a complete class or an unbounded array");
1369 template<
typename _Tp,
typename _Up>
1370 using __is_trivially_assignable_impl
1371 = __bool_constant<__is_trivially_assignable(_Tp, _Up)>;
1375 template<
typename _Tp,
typename _Up>
1377 :
public __is_trivially_assignable_impl<_Tp, _Up>
1379 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1380 "template argument must be a complete class or an unbounded array");
1384 template<
typename _Tp>
1386 :
public __is_trivially_assignable_impl<__add_lval_ref_t<_Tp>,
1387 __add_lval_ref_t<const _Tp>>
1389 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1390 "template argument must be a complete class or an unbounded array");
1394 template<
typename _Tp>
1396 :
public __is_trivially_assignable_impl<__add_lval_ref_t<_Tp>,
1397 __add_rval_ref_t<_Tp>>
1399 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1400 "template argument must be a complete class or an unbounded array");
1404 template<
typename _Tp>
1406 :
public __and_<__is_destructible_safe<_Tp>,
1407 __bool_constant<__has_trivial_destructor(_Tp)>>::type
1409 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1410 "template argument must be a complete class or an unbounded array");
1415 template<
typename _Tp>
1417 :
public __bool_constant<__has_virtual_destructor(_Tp)>
1419 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1420 "template argument must be a complete class or an unbounded array");
1427 template<
typename _Tp>
1431 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
1432 "template argument must be a complete class or an unbounded array");
1440 template<
typename _Tp, std::
size_t _Size>
1441 struct rank<_Tp[_Size]>
1444 template<
typename _Tp>
1446 :
public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
1449 template<
typename,
unsigned _U
int = 0>
1453 template<
typename _Tp,
size_t _Size>
1454 struct extent<_Tp[_Size], 0>
1457 template<
typename _Tp,
unsigned _U
int,
size_t _Size>
1458 struct extent<_Tp[_Size], _Uint>
1459 :
public extent<_Tp, _Uint - 1>::type { };
1461 template<
typename _Tp>
1462 struct extent<_Tp[], 0>
1463 :
public integral_constant<size_t, 0> { };
1465 template<
typename _Tp,
unsigned _U
int>
1466 struct extent<_Tp[], _Uint>
1467 :
public extent<_Tp, _Uint - 1>::type { };
1473#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_same)
1474 template<
typename _Tp,
typename _Up>
1476 :
public __bool_constant<__is_same(_Tp, _Up)>
1479 template<
typename _Tp,
typename _Up>
1484 template<
typename _Tp>
1491 template<
typename _Base,
typename _Derived>
1493 :
public __bool_constant<__is_base_of(_Base, _Derived)>
1496#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_convertible)
1497 template<
typename _From,
typename _To>
1499 :
public __bool_constant<__is_convertible(_From, _To)>
1502 template<
typename _From,
typename _To,
1503 bool = __or_<is_void<_From>, is_function<_To>,
1504 is_array<_To>>::value>
1505 struct __is_convertible_helper
1507 using type =
typename is_void<_To>::type;
1510#pragma GCC diagnostic push
1511#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
1512 template<
typename _From,
typename _To>
1513 class __is_convertible_helper<_From, _To, false>
1515 template<
typename _To1>
1516 static void __test_aux(_To1)
noexcept;
1518 template<
typename _From1,
typename _To1,
1519 typename =
decltype(__test_aux<_To1>(std::declval<_From1>()))>
1523 template<
typename,
typename>
1528 using type =
decltype(__test<_From, _To>(0));
1530#pragma GCC diagnostic pop
1533 template<
typename _From,
typename _To>
1535 :
public __is_convertible_helper<_From, _To>::type
1540 template<
typename _ToElementType,
typename _FromElementType>
1541 using __is_array_convertible
1544#ifdef __cpp_lib_is_nothrow_convertible
1546#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_nothrow_convertible)
1548 template<
typename _From,
typename _To>
1549 inline constexpr bool is_nothrow_convertible_v
1550 = __is_nothrow_convertible(_From, _To);
1553 template<
typename _From,
typename _To>
1554 struct is_nothrow_convertible
1555 :
public bool_constant<is_nothrow_convertible_v<_From, _To>>
1558 template<
typename _From,
typename _To,
1559 bool = __or_<is_void<_From>, is_function<_To>,
1560 is_array<_To>>::value>
1561 struct __is_nt_convertible_helper
1565#pragma GCC diagnostic push
1566#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
1567 template<
typename _From,
typename _To>
1568 class __is_nt_convertible_helper<_From, _To, false>
1570 template<
typename _To1>
1571 static void __test_aux(_To1)
noexcept;
1573 template<
typename _From1,
typename _To1>
1575 __bool_constant<noexcept(__test_aux<_To1>(std::declval<_From1>()))>
1578 template<
typename,
typename>
1583 using type =
decltype(__test<_From, _To>(0));
1585#pragma GCC diagnostic pop
1588 template<
typename _From,
typename _To>
1589 struct is_nothrow_convertible
1590 :
public __is_nt_convertible_helper<_From, _To>::type
1594 template<
typename _From,
typename _To>
1595 inline constexpr bool is_nothrow_convertible_v
1596 = is_nothrow_convertible<_From, _To>::value;
1603 template<
typename _Tp>
1605 {
using type = _Tp; };
1607 template<
typename _Tp>
1609 {
using type = _Tp; };
1612 template<
typename _Tp>
1614 {
using type = _Tp; };
1616 template<
typename _Tp>
1618 {
using type = _Tp; };
1621#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_cv)
1622 template<
typename _Tp>
1624 {
using type = __remove_cv(_Tp); };
1626 template<
typename _Tp>
1628 {
using type = _Tp; };
1630 template<
typename _Tp>
1632 {
using type = _Tp; };
1634 template<
typename _Tp>
1635 struct remove_cv<volatile _Tp>
1636 {
using type = _Tp; };
1638 template<
typename _Tp>
1639 struct remove_cv<const volatile _Tp>
1640 {
using type = _Tp; };
1644 template<
typename _Tp>
1646 {
using type = _Tp
const; };
1649 template<
typename _Tp>
1651 {
using type = _Tp
volatile; };
1654 template<
typename _Tp>
1656 {
using type = _Tp
const volatile; };
1658#ifdef __cpp_lib_transformation_trait_aliases
1660 template<typename _Tp>
1661 using remove_const_t =
typename remove_const<_Tp>::type;
1664 template<
typename _Tp>
1665 using remove_volatile_t =
typename remove_volatile<_Tp>::type;
1668 template<
typename _Tp>
1669 using remove_cv_t =
typename remove_cv<_Tp>::type;
1672 template<
typename _Tp>
1673 using add_const_t =
typename add_const<_Tp>::type;
1676 template<
typename _Tp>
1677 using add_volatile_t =
typename add_volatile<_Tp>::type;
1680 template<
typename _Tp>
1681 using add_cv_t =
typename add_cv<_Tp>::type;
1687#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_reference)
1688 template<
typename _Tp>
1690 {
using type = __remove_reference(_Tp); };
1692 template<
typename _Tp>
1694 {
using type = _Tp; };
1696 template<
typename _Tp>
1698 {
using type = _Tp; };
1700 template<
typename _Tp>
1701 struct remove_reference<_Tp&&>
1702 {
using type = _Tp; };
1706 template<
typename _Tp>
1708 {
using type = __add_lval_ref_t<_Tp>; };
1711 template<
typename _Tp>
1713 {
using type = __add_rval_ref_t<_Tp>; };
1715#if __cplusplus > 201103L
1717 template<
typename _Tp>
1721 template<
typename _Tp>
1725 template<
typename _Tp>
1734 template<
typename _Unqualified,
bool _IsConst,
bool _IsVol>
1735 struct __cv_selector;
1737 template<
typename _Unqualified>
1738 struct __cv_selector<_Unqualified, false, false>
1739 {
using __type = _Unqualified; };
1741 template<
typename _Unqualified>
1742 struct __cv_selector<_Unqualified, false, true>
1743 {
using __type =
volatile _Unqualified; };
1745 template<
typename _Unqualified>
1746 struct __cv_selector<_Unqualified, true, false>
1747 {
using __type =
const _Unqualified; };
1749 template<
typename _Unqualified>
1750 struct __cv_selector<_Unqualified, true, true>
1751 {
using __type =
const volatile _Unqualified; };
1753 template<
typename _Qualified,
typename _Unqualified,
1754 bool _IsConst = is_const<_Qualified>::value,
1755 bool _IsVol = is_volatile<_Qualified>::value>
1756 class __match_cv_qualifiers
1758 using __match = __cv_selector<_Unqualified, _IsConst, _IsVol>;
1761 using __type =
typename __match::__type;
1765 template<
typename _Tp>
1766 struct __make_unsigned
1767 {
using __type = _Tp; };
1770 struct __make_unsigned<char>
1771 {
using __type =
unsigned char; };
1774 struct __make_unsigned<signed char>
1775 {
using __type =
unsigned char; };
1778 struct __make_unsigned<short>
1779 {
using __type =
unsigned short; };
1782 struct __make_unsigned<int>
1783 {
using __type =
unsigned int; };
1786 struct __make_unsigned<long>
1787 {
using __type =
unsigned long; };
1790 struct __make_unsigned<long long>
1791 {
using __type =
unsigned long long; };
1793#if defined(__GLIBCXX_TYPE_INT_N_0)
1796 struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0>
1797 {
using __type =
unsigned __GLIBCXX_TYPE_INT_N_0; };
1799#if defined(__GLIBCXX_TYPE_INT_N_1)
1802 struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1>
1803 {
using __type =
unsigned __GLIBCXX_TYPE_INT_N_1; };
1805#if defined(__GLIBCXX_TYPE_INT_N_2)
1808 struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2>
1809 {
using __type =
unsigned __GLIBCXX_TYPE_INT_N_2; };
1811#if defined(__GLIBCXX_TYPE_INT_N_3)
1814 struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3>
1815 {
using __type =
unsigned __GLIBCXX_TYPE_INT_N_3; };
1819 template<
typename _Tp,
1820 bool _IsInt = is_integral<_Tp>::value,
1821 bool _IsEnum = __is_enum(_Tp)>
1822 class __make_unsigned_selector;
1824 template<
typename _Tp>
1825 class __make_unsigned_selector<_Tp, true, false>
1827 using __unsigned_type
1828 =
typename __make_unsigned<__remove_cv_t<_Tp>>::__type;
1832 =
typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type;
1835 class __make_unsigned_selector_base
1838 template<
typename...>
struct _List { };
1840 template<
typename _Tp,
typename... _Up>
1841 struct _List<_Tp, _Up...> : _List<_Up...>
1842 {
static constexpr size_t __size =
sizeof(_Tp); };
1844 template<
size_t _Sz,
typename _Tp,
bool = (_Sz <= _Tp::__size)>
1847 template<
size_t _Sz,
typename _U
int,
typename... _UInts>
1848 struct __select<_Sz, _List<_Uint, _UInts...>,
true>
1849 {
using __type = _Uint; };
1851 template<
size_t _Sz,
typename _Uint,
typename... _UInts>
1852 struct __select<_Sz, _List<_Uint, _UInts...>, false>
1853 : __select<_Sz, _List<_UInts...>>
1858 template<
typename _Tp>
1859 class __make_unsigned_selector<_Tp, false, true>
1860 : __make_unsigned_selector_base
1863 using _UInts = _List<
unsigned char,
unsigned short,
unsigned int,
1864 unsigned long,
unsigned long long>;
1866 using __unsigned_type =
typename __select<
sizeof(_Tp), _UInts>::__type;
1870 =
typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type;
1878 struct __make_unsigned<wchar_t>
1881 =
typename __make_unsigned_selector<wchar_t, false, true>::__type;
1884#ifdef _GLIBCXX_USE_CHAR8_T
1886 struct __make_unsigned<char8_t>
1889 =
typename __make_unsigned_selector<char8_t, false, true>::__type;
1894 struct __make_unsigned<char16_t>
1897 =
typename __make_unsigned_selector<char16_t, false, true>::__type;
1901 struct __make_unsigned<char32_t>
1904 =
typename __make_unsigned_selector<char32_t, false, true>::__type;
1912 template<
typename _Tp>
1914 {
using type =
typename __make_unsigned_selector<_Tp>::__type; };
1925 template<
typename _Tp>
1926 struct __make_signed
1927 {
using __type = _Tp; };
1930 struct __make_signed<char>
1931 {
using __type =
signed char; };
1934 struct __make_signed<unsigned char>
1935 {
using __type =
signed char; };
1938 struct __make_signed<unsigned short>
1939 {
using __type =
signed short; };
1942 struct __make_signed<unsigned int>
1943 {
using __type =
signed int; };
1946 struct __make_signed<unsigned long>
1947 {
using __type =
signed long; };
1950 struct __make_signed<unsigned long long>
1951 {
using __type =
signed long long; };
1953#if defined(__GLIBCXX_TYPE_INT_N_0)
1956 struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0>
1957 {
using __type = __GLIBCXX_TYPE_INT_N_0; };
1959#if defined(__GLIBCXX_TYPE_INT_N_1)
1962 struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1>
1963 {
using __type = __GLIBCXX_TYPE_INT_N_1; };
1965#if defined(__GLIBCXX_TYPE_INT_N_2)
1968 struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2>
1969 {
using __type = __GLIBCXX_TYPE_INT_N_2; };
1971#if defined(__GLIBCXX_TYPE_INT_N_3)
1974 struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3>
1975 {
using __type = __GLIBCXX_TYPE_INT_N_3; };
1979 template<
typename _Tp,
1980 bool _IsInt = is_integral<_Tp>::value,
1981 bool _IsEnum = __is_enum(_Tp)>
1982 class __make_signed_selector;
1984 template<
typename _Tp>
1985 class __make_signed_selector<_Tp, true, false>
1988 =
typename __make_signed<__remove_cv_t<_Tp>>::__type;
1992 =
typename __match_cv_qualifiers<_Tp, __signed_type>::__type;
1996 template<
typename _Tp>
1997 class __make_signed_selector<_Tp, false, true>
1999 using __unsigned_type =
typename __make_unsigned_selector<_Tp>::__type;
2002 using __type =
typename __make_signed_selector<__unsigned_type>::__type;
2010 struct __make_signed<wchar_t>
2013 =
typename __make_signed_selector<wchar_t, false, true>::__type;
2016#if defined(_GLIBCXX_USE_CHAR8_T)
2018 struct __make_signed<char8_t>
2021 =
typename __make_signed_selector<char8_t, false, true>::__type;
2026 struct __make_signed<char16_t>
2029 =
typename __make_signed_selector<char16_t, false, true>::__type;
2033 struct __make_signed<char32_t>
2036 =
typename __make_signed_selector<char32_t, false, true>::__type;
2044 template<
typename _Tp>
2046 {
using type =
typename __make_signed_selector<_Tp>::__type; };
2052 template<>
struct make_signed<bool const volatile>;
2054#if __cplusplus > 201103L
2056 template<
typename _Tp>
2060 template<
typename _Tp>
2067 template<
typename _Tp>
2069 {
using type = _Tp; };
2071 template<
typename _Tp, std::
size_t _Size>
2073 {
using type = _Tp; };
2075 template<
typename _Tp>
2076 struct remove_extent<_Tp[]>
2077 {
using type = _Tp; };
2080 template<
typename _Tp>
2082 {
using type = _Tp; };
2084 template<
typename _Tp, std::
size_t _Size>
2086 {
using type =
typename remove_all_extents<_Tp>::type; };
2088 template<
typename _Tp>
2089 struct remove_all_extents<_Tp[]>
2090 {
using type =
typename remove_all_extents<_Tp>::type; };
2092#if __cplusplus > 201103L
2094 template<
typename _Tp>
2098 template<
typename _Tp>
2105#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_pointer)
2106 template<
typename _Tp>
2107 struct remove_pointer
2108 {
using type = __remove_pointer(_Tp); };
2110 template<
typename _Tp,
typename>
2112 {
using type = _Tp; };
2114 template<
typename _Tp,
typename _Up>
2116 {
using type = _Up; };
2118 template<
typename _Tp>
2119 struct remove_pointer
2120 :
public __remove_pointer_helper<_Tp, __remove_cv_t<_Tp>>
2124 template<
typename _Tp,
typename =
void>
2125 struct __add_pointer_helper
2126 {
using type = _Tp; };
2128 template<
typename _Tp>
2129 struct __add_pointer_helper<_Tp, __void_t<_Tp*>>
2130 {
using type = _Tp*; };
2133 template<
typename _Tp>
2135 :
public __add_pointer_helper<_Tp>
2138 template<
typename _Tp>
2140 {
using type = _Tp*; };
2142 template<
typename _Tp>
2143 struct add_pointer<_Tp&&>
2144 {
using type = _Tp*; };
2146#if __cplusplus > 201103L
2148 template<
typename _Tp>
2152 template<
typename _Tp>
2156 template<std::
size_t _Len>
2157 struct __aligned_storage_msa
2161 unsigned char __data[_Len];
2162 struct __attribute__((__aligned__)) { } __align;
2179 template<std::size_t _Len, std::size_t _Align =
2180 __alignof__(
typename __aligned_storage_msa<_Len>::__type)>
2182 _GLIBCXX23_DEPRECATED
2187 unsigned char __data[_Len];
2188 struct __attribute__((__aligned__((_Align)))) { } __align;
2192 template <
typename... _Types>
2193 struct __strictest_alignment
2195 static const size_t _S_alignment = 0;
2196 static const size_t _S_size = 0;
2199 template <
typename _Tp,
typename... _Types>
2200 struct __strictest_alignment<_Tp, _Types...>
2202 static const size_t _S_alignment =
2203 alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment
2204 ?
alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment;
2205 static const size_t _S_size =
2206 sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size
2207 ?
sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size;
2210#pragma GCC diagnostic push
2211#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
2225 template <
size_t _Len,
typename... _Types>
2227 _GLIBCXX23_DEPRECATED
2231 static_assert(
sizeof...(_Types) != 0,
"At least one type is required");
2233 using __strictest = __strictest_alignment<_Types...>;
2234 static const size_t _S_len = _Len > __strictest::_S_size
2235 ? _Len : __strictest::_S_size;
2238 static const size_t alignment_value = __strictest::_S_alignment;
2243 template <
size_t _Len,
typename... _Types>
2244 const size_t aligned_union<_Len, _Types...>::alignment_value;
2245#pragma GCC diagnostic pop
2251 template<
typename _Up>
2252 struct __decay_selector
2253 : __conditional_t<is_const<const _Up>::value,
2258 template<
typename _Up,
size_t _Nm>
2259 struct __decay_selector<_Up[_Nm]>
2260 {
using type = _Up*; };
2262 template<
typename _Up>
2263 struct __decay_selector<_Up[]>
2264 {
using type = _Up*; };
2269 template<
typename _Tp>
2271 {
using type =
typename __decay_selector<_Tp>::type; };
2273 template<
typename _Tp>
2275 {
using type =
typename __decay_selector<_Tp>::type; };
2277 template<
typename _Tp>
2279 {
using type =
typename __decay_selector<_Tp>::type; };
2284 template<
typename _Tp>
2285 struct __strip_reference_wrapper
2290 template<
typename _Tp>
2291 struct __strip_reference_wrapper<reference_wrapper<_Tp> >
2293 using __type = _Tp&;
2297 template<
typename _Tp>
2298 using __decay_t =
typename decay<_Tp>::type;
2300 template<
typename _Tp>
2301 using __decay_and_strip = __strip_reference_wrapper<__decay_t<_Tp>>;
2307 template<
typename... _Cond>
2308 using _Require = __enable_if_t<__and_<_Cond...>::value>;
2311 template<
typename _Tp>
2312 using __remove_cvref_t
2313 =
typename remove_cv<typename remove_reference<_Tp>::type>::type;
2318 template<
bool _Cond,
typename _Iftrue,
typename _Iffalse>
2320 {
using type = _Iftrue; };
2323 template<
typename _Iftrue,
typename _Iffalse>
2325 {
using type = _Iffalse; };
2328 template<
typename... _Tp>
2340 template<
typename _Tp>
2341 struct __success_type
2342 {
using type = _Tp; };
2344 struct __failure_type
2347 struct __do_common_type_impl
2349 template<
typename _Tp,
typename _Up>
2351 =
decltype(
true ? std::declval<_Tp>() :
std::declval<_Up>());
2355 template<
typename _Tp,
typename _Up>
2356 static __success_type<__decay_t<__cond_t<_Tp, _Up>>>
2359#if __cplusplus > 201703L
2362 template<
typename _Tp,
typename _Up>
2363 static __success_type<__remove_cvref_t<__cond_t<const _Tp&, const _Up&>>>
2367 template<
typename,
typename>
2368 static __failure_type
2371 template<
typename _Tp,
typename _Up>
2372 static decltype(_S_test_2<_Tp, _Up>(0))
2378 struct common_type<>
2382 template<
typename _Tp0>
2383 struct common_type<_Tp0>
2384 :
public common_type<_Tp0, _Tp0>
2388 template<
typename _Tp1,
typename _Tp2,
2389 typename _Dp1 = __decay_t<_Tp1>,
typename _Dp2 = __decay_t<_Tp2>>
2390 struct __common_type_impl
2394 using type = common_type<_Dp1, _Dp2>;
2397 template<
typename _Tp1,
typename _Tp2>
2398 struct __common_type_impl<_Tp1, _Tp2, _Tp1, _Tp2>
2399 :
private __do_common_type_impl
2403 using type =
decltype(_S_test<_Tp1, _Tp2>(0));
2407 template<
typename _Tp1,
typename _Tp2>
2408 struct common_type<_Tp1, _Tp2>
2409 :
public __common_type_impl<_Tp1, _Tp2>::type
2412 template<
typename...>
2413 struct __common_type_pack
2416 template<
typename,
typename,
typename =
void>
2417 struct __common_type_fold;
2420 template<
typename _Tp1,
typename _Tp2,
typename... _Rp>
2421 struct common_type<_Tp1, _Tp2, _Rp...>
2422 :
public __common_type_fold<common_type<_Tp1, _Tp2>,
2423 __common_type_pack<_Rp...>>
2429 template<
typename _CTp,
typename... _Rp>
2430 struct __common_type_fold<_CTp, __common_type_pack<_Rp...>,
2431 __void_t<typename _CTp::type>>
2432 :
public common_type<typename _CTp::type, _Rp...>
2436 template<
typename _CTp,
typename _Rp>
2437 struct __common_type_fold<_CTp, _Rp, void>
2440 template<
typename _Tp,
bool = __is_enum(_Tp)>
2441 struct __underlying_type_impl
2443 using type = __underlying_type(_Tp);
2446 template<
typename _Tp>
2447 struct __underlying_type_impl<_Tp, false>
2452 template<
typename _Tp>
2454 :
public __underlying_type_impl<_Tp>
2458 template<
typename _Tp>
2459 struct __declval_protector
2461 static const bool __stop =
false;
2469 template<
typename _Tp>
2470 auto declval() noexcept -> decltype(__declval<_Tp>(0))
2472 static_assert(__declval_protector<_Tp>::__stop,
2473 "declval() must not be used!");
2474 return __declval<_Tp>(0);
2478 template<
typename _Signature>
2484 struct __invoke_memfun_ref { };
2485 struct __invoke_memfun_deref { };
2486 struct __invoke_memobj_ref { };
2487 struct __invoke_memobj_deref { };
2488 struct __invoke_other { };
2491 template<
typename _Tp,
typename _Tag>
2492 struct __result_of_success : __success_type<_Tp>
2493 {
using __invoke_type = _Tag; };
2496 struct __result_of_memfun_ref_impl
2498 template<
typename _Fp,
typename _Tp1,
typename... _Args>
2499 static __result_of_success<
decltype(
2500 (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...)
2501 ), __invoke_memfun_ref> _S_test(
int);
2503 template<
typename...>
2504 static __failure_type _S_test(...);
2507 template<
typename _MemPtr,
typename _Arg,
typename... _Args>
2508 struct __result_of_memfun_ref
2509 :
private __result_of_memfun_ref_impl
2511 using type =
decltype(_S_test<_MemPtr, _Arg, _Args...>(0));
2515 struct __result_of_memfun_deref_impl
2517 template<
typename _Fp,
typename _Tp1,
typename... _Args>
2518 static __result_of_success<
decltype(
2519 ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...)
2520 ), __invoke_memfun_deref> _S_test(
int);
2522 template<
typename...>
2523 static __failure_type _S_test(...);
2526 template<
typename _MemPtr,
typename _Arg,
typename... _Args>
2527 struct __result_of_memfun_deref
2528 :
private __result_of_memfun_deref_impl
2530 using type =
decltype(_S_test<_MemPtr, _Arg, _Args...>(0));
2534 struct __result_of_memobj_ref_impl
2536 template<
typename _Fp,
typename _Tp1>
2537 static __result_of_success<
decltype(
2538 std::declval<_Tp1>().*std::declval<_Fp>()
2539 ), __invoke_memobj_ref> _S_test(
int);
2541 template<
typename,
typename>
2542 static __failure_type _S_test(...);
2545 template<
typename _MemPtr,
typename _Arg>
2546 struct __result_of_memobj_ref
2547 :
private __result_of_memobj_ref_impl
2549 using type =
decltype(_S_test<_MemPtr, _Arg>(0));
2553 struct __result_of_memobj_deref_impl
2555 template<
typename _Fp,
typename _Tp1>
2556 static __result_of_success<
decltype(
2557 (*std::declval<_Tp1>()).*std::declval<_Fp>()
2558 ), __invoke_memobj_deref> _S_test(
int);
2560 template<
typename,
typename>
2561 static __failure_type _S_test(...);
2564 template<
typename _MemPtr,
typename _Arg>
2565 struct __result_of_memobj_deref
2566 :
private __result_of_memobj_deref_impl
2568 using type =
decltype(_S_test<_MemPtr, _Arg>(0));
2571 template<
typename _MemPtr,
typename _Arg>
2572 struct __result_of_memobj;
2574 template<
typename _Res,
typename _Class,
typename _Arg>
2575 struct __result_of_memobj<_Res _Class::*, _Arg>
2577 using _Argval = __remove_cvref_t<_Arg>;
2578 using _MemPtr = _Res _Class::*;
2579 using type =
typename __conditional_t<__or_<is_same<_Argval, _Class>,
2580 is_base_of<_Class, _Argval>>::value,
2581 __result_of_memobj_ref<_MemPtr, _Arg>,
2582 __result_of_memobj_deref<_MemPtr, _Arg>
2586 template<
typename _MemPtr,
typename _Arg,
typename... _Args>
2587 struct __result_of_memfun;
2589 template<
typename _Res,
typename _Class,
typename _Arg,
typename... _Args>
2590 struct __result_of_memfun<_Res _Class::*, _Arg, _Args...>
2592 using _Argval =
typename remove_reference<_Arg>::type;
2593 using _MemPtr = _Res _Class::*;
2594 using type =
typename __conditional_t<is_base_of<_Class, _Argval>::value,
2595 __result_of_memfun_ref<_MemPtr, _Arg, _Args...>,
2596 __result_of_memfun_deref<_MemPtr, _Arg, _Args...>
2605 template<
typename _Tp,
typename _Up = __remove_cvref_t<_Tp>>
2611 template<
typename _Tp,
typename _Up>
2612 struct __inv_unwrap<_Tp, reference_wrapper<_Up>>
2617 template<bool, bool,
typename _Functor,
typename... _ArgTypes>
2618 struct __result_of_impl
2620 using type = __failure_type;
2623 template<
typename _MemPtr,
typename _Arg>
2624 struct __result_of_impl<true, false, _MemPtr, _Arg>
2625 :
public __result_of_memobj<__decay_t<_MemPtr>,
2626 typename __inv_unwrap<_Arg>::type>
2629 template<
typename _MemPtr,
typename _Arg,
typename... _Args>
2630 struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...>
2631 :
public __result_of_memfun<__decay_t<_MemPtr>,
2632 typename __inv_unwrap<_Arg>::type, _Args...>
2636 struct __result_of_other_impl
2638 template<
typename _Fn,
typename... _Args>
2639 static __result_of_success<
decltype(
2640 std::declval<_Fn>()(std::declval<_Args>()...)
2641 ), __invoke_other> _S_test(
int);
2643 template<
typename...>
2644 static __failure_type _S_test(...);
2647 template<
typename _Functor,
typename... _ArgTypes>
2648 struct __result_of_impl<false, false, _Functor, _ArgTypes...>
2649 :
private __result_of_other_impl
2651 using type =
decltype(_S_test<_Functor, _ArgTypes...>(0));
2655 template<
typename _Functor,
typename... _ArgTypes>
2656 struct __invoke_result
2657 :
public __result_of_impl<
2658 is_member_object_pointer<
2659 typename remove_reference<_Functor>::type
2661 is_member_function_pointer<
2662 typename remove_reference<_Functor>::type
2664 _Functor, _ArgTypes...
2669 template<
typename _Fn,
typename... _Args>
2670 using __invoke_result_t =
typename __invoke_result<_Fn, _Args...>::type;
2673 template<
typename _Functor,
typename... _ArgTypes>
2674 struct result_of<_Functor(_ArgTypes...)>
2675 :
public __invoke_result<_Functor, _ArgTypes...>
2676 { } _GLIBCXX17_DEPRECATED_SUGGEST(
"std::invoke_result");
2678#if __cplusplus >= 201402L
2679#pragma GCC diagnostic push
2680#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
2682 template<
size_t _Len,
size_t _Align =
2683 __alignof__(
typename __aligned_storage_msa<_Len>::__type)>
2686 template <
size_t _Len,
typename... _Types>
2687 using aligned_union_t _GLIBCXX23_DEPRECATED =
typename aligned_union<_Len, _Types...>::type;
2688#pragma GCC diagnostic pop
2691 template<
typename _Tp>
2695 template<
bool _Cond,
typename _Tp =
void>
2699 template<
bool _Cond,
typename _Iftrue,
typename _Iffalse>
2703 template<
typename... _Tp>
2707 template<
typename _Tp>
2711 template<
typename _Tp>
2715#ifdef __cpp_lib_void_t
2717 template<typename...> using void_t = void;
2727 template<
typename _Def,
template<
typename...>
class _Op,
typename... _Args>
2728 struct __detected_or
2735 template<
typename _Def,
template<
typename...>
class _Op,
typename... _Args>
2736 requires requires {
typename _Op<_Args...>; }
2737 struct __detected_or<_Def, _Op, _Args...>
2739 using type = _Op<_Args...>;
2744 template<
typename _Default,
typename _AlwaysVoid,
2745 template<
typename...>
class _Op,
typename... _Args>
2748 using type = _Default;
2753 template<
typename _Default,
template<
typename...>
class _Op,
2755 struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...>
2757 using type = _Op<_Args...>;
2761 template<
typename _Default,
template<
typename...>
class _Op,
2763 using __detected_or = __detector<_Default, void, _Op, _Args...>;
2767 template<
typename _Default,
template<
typename...>
class _Op,
2769 using __detected_or_t
2770 =
typename __detected_or<_Default, _Op, _Args...>::type;
2776#define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \
2777 template<typename _Tp, typename = __void_t<>> \
2778 struct __has_##_NTYPE \
2781 template<typename _Tp> \
2782 struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \
2786 template <
typename _Tp>
2787 struct __is_swappable;
2789 template <
typename _Tp>
2790 struct __is_nothrow_swappable;
2797 template<
typename _Tp>
2798 struct __is_tuple_like
2799 :
public __is_tuple_like_impl<__remove_cvref_t<_Tp>>::type
2803 template<
typename _Tp>
2804 _GLIBCXX20_CONSTEXPR
2806 _Require<__not_<__is_tuple_like<_Tp>>,
2807 is_move_constructible<_Tp>,
2808 is_move_assignable<_Tp>>
2810 noexcept(__and_<is_nothrow_move_constructible<_Tp>,
2811 is_nothrow_move_assignable<_Tp>>::value);
2813 template<
typename _Tp,
size_t _Nm>
2814 _GLIBCXX20_CONSTEXPR
2816 __enable_if_t<__is_swappable<_Tp>::value>
2817 swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
2818 noexcept(__is_nothrow_swappable<_Tp>::value);
2821 namespace __swappable_details {
2824 struct __do_is_swappable_impl
2826 template<
typename _Tp,
typename
2827 =
decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))>
2828 static true_type __test(
int);
2834 struct __do_is_nothrow_swappable_impl
2836 template<
typename _Tp>
2837 static __bool_constant<
2838 noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))
2847 template<
typename _Tp>
2848 struct __is_swappable_impl
2849 :
public __swappable_details::__do_is_swappable_impl
2851 using type =
decltype(__test<_Tp>(0));
2854 template<
typename _Tp>
2855 struct __is_nothrow_swappable_impl
2856 :
public __swappable_details::__do_is_nothrow_swappable_impl
2858 using type =
decltype(__test<_Tp>(0));
2861 template<
typename _Tp>
2862 struct __is_swappable
2863 :
public __is_swappable_impl<_Tp>::type
2866 template<
typename _Tp>
2867 struct __is_nothrow_swappable
2868 :
public __is_nothrow_swappable_impl<_Tp>::type
2872#ifdef __cpp_lib_is_swappable
2876 template<
typename _Tp>
2878 :
public __is_swappable_impl<_Tp>::type
2880 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
2881 "template argument must be a complete class or an unbounded array");
2885 template<
typename _Tp>
2886 struct is_nothrow_swappable
2887 :
public __is_nothrow_swappable_impl<_Tp>::type
2889 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
2890 "template argument must be a complete class or an unbounded array");
2893#if __cplusplus >= 201402L
2895 template<
typename _Tp>
2896 _GLIBCXX17_INLINE
constexpr bool is_swappable_v =
2897 is_swappable<_Tp>::value;
2900 template<
typename _Tp>
2901 _GLIBCXX17_INLINE
constexpr bool is_nothrow_swappable_v =
2902 is_nothrow_swappable<_Tp>::value;
2906 namespace __swappable_with_details {
2909 struct __do_is_swappable_with_impl
2911 template<
typename _Tp,
typename _Up,
typename
2912 =
decltype(swap(std::declval<_Tp>(), std::declval<_Up>())),
2914 =
decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))>
2917 template<
typename,
typename>
2921 struct __do_is_nothrow_swappable_with_impl
2923 template<
typename _Tp,
typename _Up>
2924 static __bool_constant<
2925 noexcept(swap(std::declval<_Tp>(), std::declval<_Up>()))
2927 noexcept(swap(std::declval<_Up>(), std::declval<_Tp>()))
2930 template<
typename,
typename>
2936 template<
typename _Tp,
typename _Up>
2937 struct __is_swappable_with_impl
2938 :
public __swappable_with_details::__do_is_swappable_with_impl
2940 using type =
decltype(__test<_Tp, _Up>(0));
2944 template<
typename _Tp>
2945 struct __is_swappable_with_impl<_Tp&, _Tp&>
2946 :
public __swappable_details::__do_is_swappable_impl
2948 using type =
decltype(__test<_Tp&>(0));
2951 template<
typename _Tp,
typename _Up>
2952 struct __is_nothrow_swappable_with_impl
2953 :
public __swappable_with_details::__do_is_nothrow_swappable_with_impl
2955 using type =
decltype(__test<_Tp, _Up>(0));
2959 template<
typename _Tp>
2960 struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&>
2961 :
public __swappable_details::__do_is_nothrow_swappable_impl
2963 using type =
decltype(__test<_Tp&>(0));
2968 template<
typename _Tp,
typename _Up>
2969 struct is_swappable_with
2970 :
public __is_swappable_with_impl<_Tp, _Up>::type
2972 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
2973 "first template argument must be a complete class or an unbounded array");
2974 static_assert(std::__is_complete_or_unbounded(__type_identity<_Up>{}),
2975 "second template argument must be a complete class or an unbounded array");
2979 template<
typename _Tp,
typename _Up>
2980 struct is_nothrow_swappable_with
2981 :
public __is_nothrow_swappable_with_impl<_Tp, _Up>::type
2983 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
2984 "first template argument must be a complete class or an unbounded array");
2985 static_assert(std::__is_complete_or_unbounded(__type_identity<_Up>{}),
2986 "second template argument must be a complete class or an unbounded array");
2989#if __cplusplus >= 201402L
2991 template<
typename _Tp,
typename _Up>
2992 _GLIBCXX17_INLINE
constexpr bool is_swappable_with_v =
2993 is_swappable_with<_Tp, _Up>::value;
2996 template<
typename _Tp,
typename _Up>
2997 _GLIBCXX17_INLINE
constexpr bool is_nothrow_swappable_with_v =
2998 is_nothrow_swappable_with<_Tp, _Up>::value;
3008 template<
typename _Result,
typename _Ret,
3009 bool = is_void<_Ret>::value,
typename =
void>
3010 struct __is_invocable_impl
3017 template<
typename _Result,
typename _Ret>
3018 struct __is_invocable_impl<_Result, _Ret,
3020 __void_t<typename _Result::type>>
3026#pragma GCC diagnostic push
3027#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
3029 template<
typename _Result,
typename _Ret>
3030 struct __is_invocable_impl<_Result, _Ret,
3032 __void_t<typename _Result::type>>
3036 using _Res_t =
typename _Result::type;
3040 static _Res_t _S_get() noexcept;
3043 template<typename _Tp>
3044 static
void _S_conv(__type_identity_t<_Tp>) noexcept;
3047 template<typename _Tp,
3048 bool _Nothrow = noexcept(_S_conv<_Tp>(_S_get())),
3049 typename = decltype(_S_conv<_Tp>(_S_get())),
3050#if __has_builtin(__reference_converts_from_temporary)
3051 bool _Dangle = __reference_converts_from_temporary(_Tp, _Res_t)
3053 bool _Dangle =
false
3056 static __bool_constant<_Nothrow && !_Dangle>
3059 template<
typename _Tp,
bool = false>
3065 using type =
decltype(_S_test<_Ret,
true>(1));
3068 using __nothrow_conv =
decltype(_S_test<_Ret>(1));
3070#pragma GCC diagnostic pop
3072 template<
typename _Fn,
typename... _ArgTypes>
3073 struct __is_invocable
3074 : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
3077 template<
typename _Fn,
typename _Tp,
typename... _Args>
3078 constexpr bool __call_is_nt(__invoke_memfun_ref)
3080 using _Up =
typename __inv_unwrap<_Tp>::type;
3081 return noexcept((std::declval<_Up>().*std::declval<_Fn>())(
3082 std::declval<_Args>()...));
3085 template<
typename _Fn,
typename _Tp,
typename... _Args>
3086 constexpr bool __call_is_nt(__invoke_memfun_deref)
3088 return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())(
3089 std::declval<_Args>()...));
3092 template<
typename _Fn,
typename _Tp>
3093 constexpr bool __call_is_nt(__invoke_memobj_ref)
3095 using _Up =
typename __inv_unwrap<_Tp>::type;
3096 return noexcept(std::declval<_Up>().*std::declval<_Fn>());
3099 template<
typename _Fn,
typename _Tp>
3100 constexpr bool __call_is_nt(__invoke_memobj_deref)
3102 return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>());
3105 template<
typename _Fn,
typename... _Args>
3106 constexpr bool __call_is_nt(__invoke_other)
3108 return noexcept(std::declval<_Fn>()(std::declval<_Args>()...));
3111 template<
typename _Result,
typename _Fn,
typename... _Args>
3112 struct __call_is_nothrow
3114 std::__call_is_nt<_Fn, _Args...>(typename _Result::__invoke_type{})
3118 template<
typename _Fn,
typename... _Args>
3119 using __call_is_nothrow_
3120 = __call_is_nothrow<__invoke_result<_Fn, _Args...>, _Fn, _Args...>;
3123 template<
typename _Fn,
typename... _Args>
3124 struct __is_nothrow_invocable
3125 : __and_<__is_invocable<_Fn, _Args...>,
3126 __call_is_nothrow_<_Fn, _Args...>>::type
3129#pragma GCC diagnostic push
3130#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
3131 struct __nonesuchbase {};
3132 struct __nonesuch :
private __nonesuchbase {
3133 ~__nonesuch() =
delete;
3134 __nonesuch(__nonesuch
const&) =
delete;
3135 void operator=(__nonesuch
const&) =
delete;
3137#pragma GCC diagnostic pop
3140#ifdef __cpp_lib_is_invocable
3142 template<typename _Functor, typename... _ArgTypes>
3143 struct invoke_result
3144 :
public __invoke_result<_Functor, _ArgTypes...>
3146 static_assert(std::__is_complete_or_unbounded(__type_identity<_Functor>{}),
3147 "_Functor must be a complete class or an unbounded array");
3148 static_assert((std::__is_complete_or_unbounded(
3149 __type_identity<_ArgTypes>{}) && ...),
3150 "each argument type must be a complete class or an unbounded array");
3154 template<
typename _Fn,
typename... _Args>
3155 using invoke_result_t =
typename invoke_result<_Fn, _Args...>::type;
3158 template<
typename _Fn,
typename... _ArgTypes>
3160 : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
3162 static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
3163 "_Fn must be a complete class or an unbounded array");
3164 static_assert((std::__is_complete_or_unbounded(
3165 __type_identity<_ArgTypes>{}) && ...),
3166 "each argument type must be a complete class or an unbounded array");
3170 template<
typename _Ret,
typename _Fn,
typename... _ArgTypes>
3171 struct is_invocable_r
3172 : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>::type
3174 static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
3175 "_Fn must be a complete class or an unbounded array");
3176 static_assert((std::__is_complete_or_unbounded(
3177 __type_identity<_ArgTypes>{}) && ...),
3178 "each argument type must be a complete class or an unbounded array");
3179 static_assert(std::__is_complete_or_unbounded(__type_identity<_Ret>{}),
3180 "_Ret must be a complete class or an unbounded array");
3184 template<
typename _Fn,
typename... _ArgTypes>
3185 struct is_nothrow_invocable
3186 : __and_<__is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>,
3187 __call_is_nothrow_<_Fn, _ArgTypes...>>::type
3189 static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
3190 "_Fn must be a complete class or an unbounded array");
3191 static_assert((std::__is_complete_or_unbounded(
3192 __type_identity<_ArgTypes>{}) && ...),
3193 "each argument type must be a complete class or an unbounded array");
3200 template<
typename _Result,
typename _Ret>
3201 using __is_nt_invocable_impl
3202 =
typename __is_invocable_impl<_Result, _Ret>::__nothrow_conv;
3206 template<
typename _Ret,
typename _Fn,
typename... _ArgTypes>
3207 struct is_nothrow_invocable_r
3208 : __and_<__is_nt_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>,
3209 __call_is_nothrow_<_Fn, _ArgTypes...>>::type
3211 static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
3212 "_Fn must be a complete class or an unbounded array");
3213 static_assert((std::__is_complete_or_unbounded(
3214 __type_identity<_ArgTypes>{}) && ...),
3215 "each argument type must be a complete class or an unbounded array");
3216 static_assert(std::__is_complete_or_unbounded(__type_identity<_Ret>{}),
3217 "_Ret must be a complete class or an unbounded array");
3221#if __cpp_lib_type_trait_variable_templates
3236template <
typename _Tp>
3237 inline constexpr bool is_void_v = is_void<_Tp>::value;
3238template <
typename _Tp>
3239 inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value;
3240template <
typename _Tp>
3241 inline constexpr bool is_integral_v = is_integral<_Tp>::value;
3242template <
typename _Tp>
3243 inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value;
3245#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_array)
3246template <
typename _Tp>
3247 inline constexpr bool is_array_v = __is_array(_Tp);
3249template <
typename _Tp>
3250 inline constexpr bool is_array_v =
false;
3251template <
typename _Tp>
3252 inline constexpr bool is_array_v<_Tp[]> =
true;
3253template <
typename _Tp,
size_t _Num>
3254 inline constexpr bool is_array_v<_Tp[_Num]> =
true;
3257template <
typename _Tp>
3258 inline constexpr bool is_pointer_v = is_pointer<_Tp>::value;
3259template <
typename _Tp>
3260 inline constexpr bool is_lvalue_reference_v =
false;
3261template <
typename _Tp>
3262 inline constexpr bool is_lvalue_reference_v<_Tp&> =
true;
3263template <
typename _Tp>
3264 inline constexpr bool is_rvalue_reference_v =
false;
3265template <
typename _Tp>
3266 inline constexpr bool is_rvalue_reference_v<_Tp&&> =
true;
3268#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_object_pointer)
3269template <
typename _Tp>
3270 inline constexpr bool is_member_object_pointer_v =
3271 __is_member_object_pointer(_Tp);
3273template <
typename _Tp>
3274 inline constexpr bool is_member_object_pointer_v =
3275 is_member_object_pointer<_Tp>::value;
3278#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_function_pointer)
3279template <
typename _Tp>
3280 inline constexpr bool is_member_function_pointer_v =
3281 __is_member_function_pointer(_Tp);
3283template <
typename _Tp>
3284 inline constexpr bool is_member_function_pointer_v =
3285 is_member_function_pointer<_Tp>::value;
3288template <
typename _Tp>
3289 inline constexpr bool is_enum_v = __is_enum(_Tp);
3290template <
typename _Tp>
3291 inline constexpr bool is_union_v = __is_union(_Tp);
3292template <
typename _Tp>
3293 inline constexpr bool is_class_v = __is_class(_Tp);
3296#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_reference)
3297template <
typename _Tp>
3298 inline constexpr bool is_reference_v = __is_reference(_Tp);
3300template <
typename _Tp>
3301 inline constexpr bool is_reference_v =
false;
3302template <
typename _Tp>
3303 inline constexpr bool is_reference_v<_Tp&> =
true;
3304template <
typename _Tp>
3305 inline constexpr bool is_reference_v<_Tp&&> =
true;
3308template <
typename _Tp>
3309 inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value;
3310template <
typename _Tp>
3311 inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value;
3313#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_object)
3314template <
typename _Tp>
3315 inline constexpr bool is_object_v = __is_object(_Tp);
3317template <
typename _Tp>
3318 inline constexpr bool is_object_v = is_object<_Tp>::value;
3321template <
typename _Tp>
3322 inline constexpr bool is_scalar_v = is_scalar<_Tp>::value;
3323template <
typename _Tp>
3324 inline constexpr bool is_compound_v = !is_fundamental_v<_Tp>;
3326#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_pointer)
3327template <
typename _Tp>
3328 inline constexpr bool is_member_pointer_v = __is_member_pointer(_Tp);
3330template <
typename _Tp>
3331 inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value;
3334template <
typename _Tp>
3335 inline constexpr bool is_const_v =
false;
3336template <
typename _Tp>
3337 inline constexpr bool is_const_v<const _Tp> =
true;
3339#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_function)
3340template <
typename _Tp>
3341 inline constexpr bool is_function_v = __is_function(_Tp);
3343template <
typename _Tp>
3344 inline constexpr bool is_function_v = !is_const_v<const _Tp>;
3345template <
typename _Tp>
3346 inline constexpr bool is_function_v<_Tp&> =
false;
3347template <
typename _Tp>
3348 inline constexpr bool is_function_v<_Tp&&> =
false;
3351template <
typename _Tp>
3352 inline constexpr bool is_volatile_v =
false;
3353template <
typename _Tp>
3354 inline constexpr bool is_volatile_v<volatile _Tp> =
true;
3356template <
typename _Tp>
3357 inline constexpr bool is_trivial_v = __is_trivial(_Tp);
3358template <
typename _Tp>
3359 inline constexpr bool is_trivially_copyable_v = __is_trivially_copyable(_Tp);
3360template <
typename _Tp>
3361 inline constexpr bool is_standard_layout_v = __is_standard_layout(_Tp);
3362template <
typename _Tp>
3363 _GLIBCXX20_DEPRECATED_SUGGEST(
"is_standard_layout_v && is_trivial_v")
3364 inline constexpr
bool is_pod_v = __is_pod(_Tp);
3365template <typename _Tp>
3366 _GLIBCXX17_DEPRECATED
3367 inline constexpr
bool is_literal_type_v = __is_literal_type(_Tp);
3368template <typename _Tp>
3369 inline constexpr
bool is_empty_v = __is_empty(_Tp);
3370template <typename _Tp>
3371 inline constexpr
bool is_polymorphic_v = __is_polymorphic(_Tp);
3372template <typename _Tp>
3373 inline constexpr
bool is_abstract_v = __is_abstract(_Tp);
3374template <typename _Tp>
3375 inline constexpr
bool is_final_v = __is_final(_Tp);
3377template <typename _Tp>
3378 inline constexpr
bool is_signed_v = is_signed<_Tp>::value;
3379template <typename _Tp>
3380 inline constexpr
bool is_unsigned_v = is_unsigned<_Tp>::value;
3382template <typename _Tp, typename... _Args>
3383 inline constexpr
bool is_constructible_v = __is_constructible(_Tp, _Args...);
3384template <typename _Tp>
3385 inline constexpr
bool is_default_constructible_v = __is_constructible(_Tp);
3386template <typename _Tp>
3387 inline constexpr
bool is_copy_constructible_v
3388 = __is_constructible(_Tp, __add_lval_ref_t<const _Tp>);
3389template <typename _Tp>
3390 inline constexpr
bool is_move_constructible_v
3391 = __is_constructible(_Tp, __add_rval_ref_t<_Tp>);
3393template <typename _Tp, typename _Up>
3394 inline constexpr
bool is_assignable_v = __is_assignable(_Tp, _Up);
3395template <typename _Tp>
3396 inline constexpr
bool is_copy_assignable_v
3397 = __is_assignable(__add_lval_ref_t<_Tp>, __add_lval_ref_t<const _Tp>);
3398template <typename _Tp>
3399 inline constexpr
bool is_move_assignable_v
3400 = __is_assignable(__add_lval_ref_t<_Tp>, __add_rval_ref_t<_Tp>);
3402template <typename _Tp>
3403 inline constexpr
bool is_destructible_v = is_destructible<_Tp>::value;
3405template <typename _Tp, typename... _Args>
3406 inline constexpr
bool is_trivially_constructible_v
3407 = __is_trivially_constructible(_Tp, _Args...);
3408template <typename _Tp>
3409 inline constexpr
bool is_trivially_default_constructible_v
3410 = __is_trivially_constructible(_Tp);
3411template <typename _Tp>
3412 inline constexpr
bool is_trivially_copy_constructible_v
3413 = __is_trivially_constructible(_Tp, __add_lval_ref_t<const _Tp>);
3414template <typename _Tp>
3415 inline constexpr
bool is_trivially_move_constructible_v
3416 = __is_trivially_constructible(_Tp, __add_rval_ref_t<_Tp>);
3418template <typename _Tp, typename _Up>
3419 inline constexpr
bool is_trivially_assignable_v
3420 = __is_trivially_assignable(_Tp, _Up);
3421template <typename _Tp>
3422 inline constexpr
bool is_trivially_copy_assignable_v
3423 = __is_trivially_assignable(__add_lval_ref_t<_Tp>,
3424 __add_lval_ref_t<const _Tp>);
3425template <typename _Tp>
3426 inline constexpr
bool is_trivially_move_assignable_v
3427 = __is_trivially_assignable(__add_lval_ref_t<_Tp>,
3428 __add_rval_ref_t<_Tp>);
3431template <
typename _Tp>
3432 inline constexpr bool is_trivially_destructible_v =
false;
3434template <
typename _Tp>
3435 requires (!is_reference_v<_Tp>) &&
requires (_Tp& __t) { __t.~_Tp(); }
3436 inline constexpr bool is_trivially_destructible_v<_Tp>
3437 = __has_trivial_destructor(_Tp);
3438template <
typename _Tp>
3439 inline constexpr bool is_trivially_destructible_v<_Tp&> =
true;
3440template <
typename _Tp>
3441 inline constexpr bool is_trivially_destructible_v<_Tp&&> =
true;
3442template <
typename _Tp,
size_t _Nm>
3443 inline constexpr bool is_trivially_destructible_v<_Tp[_Nm]>
3444 = is_trivially_destructible_v<_Tp>;
3446template <
typename _Tp>
3447 inline constexpr bool is_trivially_destructible_v =
3448 is_trivially_destructible<_Tp>::value;
3451template <
typename _Tp,
typename... _Args>
3452 inline constexpr bool is_nothrow_constructible_v
3453 = __is_nothrow_constructible(_Tp, _Args...);
3454template <
typename _Tp>
3455 inline constexpr bool is_nothrow_default_constructible_v
3456 = __is_nothrow_constructible(_Tp);
3457template <
typename _Tp>
3458 inline constexpr bool is_nothrow_copy_constructible_v
3459 = __is_nothrow_constructible(_Tp, __add_lval_ref_t<const _Tp>);
3460template <
typename _Tp>
3461 inline constexpr bool is_nothrow_move_constructible_v
3462 = __is_nothrow_constructible(_Tp, __add_rval_ref_t<_Tp>);
3464template <
typename _Tp,
typename _Up>
3465 inline constexpr bool is_nothrow_assignable_v
3466 = __is_nothrow_assignable(_Tp, _Up);
3467template <
typename _Tp>
3468 inline constexpr bool is_nothrow_copy_assignable_v
3469 = __is_nothrow_assignable(__add_lval_ref_t<_Tp>,
3470 __add_lval_ref_t<const _Tp>);
3471template <
typename _Tp>
3472 inline constexpr bool is_nothrow_move_assignable_v
3473 = __is_nothrow_assignable(__add_lval_ref_t<_Tp>, __add_rval_ref_t<_Tp>);
3475template <
typename _Tp>
3476 inline constexpr bool is_nothrow_destructible_v =
3477 is_nothrow_destructible<_Tp>::value;
3479template <
typename _Tp>
3480 inline constexpr bool has_virtual_destructor_v
3481 = __has_virtual_destructor(_Tp);
3483template <
typename _Tp>
3484 inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value;
3486template <
typename _Tp>
3487 inline constexpr size_t rank_v = 0;
3488template <
typename _Tp,
size_t _Size>
3489 inline constexpr size_t rank_v<_Tp[_Size]> = 1 + rank_v<_Tp>;
3490template <
typename _Tp>
3491 inline constexpr size_t rank_v<_Tp[]> = 1 + rank_v<_Tp>;
3493template <
typename _Tp,
unsigned _Idx = 0>
3494 inline constexpr size_t extent_v = 0;
3495template <
typename _Tp,
size_t _Size>
3496 inline constexpr size_t extent_v<_Tp[_Size], 0> = _Size;
3497template <
typename _Tp,
unsigned _Idx,
size_t _Size>
3498 inline constexpr size_t extent_v<_Tp[_Size], _Idx> = extent_v<_Tp, _Idx - 1>;
3499template <
typename _Tp>
3500 inline constexpr size_t extent_v<_Tp[], 0> = 0;
3501template <
typename _Tp,
unsigned _Idx>
3502 inline constexpr size_t extent_v<_Tp[], _Idx> = extent_v<_Tp, _Idx - 1>;
3504#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_same)
3505template <
typename _Tp,
typename _Up>
3506 inline constexpr bool is_same_v = __is_same(_Tp, _Up);
3508template <
typename _Tp,
typename _Up>
3509 inline constexpr bool is_same_v =
false;
3510template <
typename _Tp>
3511 inline constexpr bool is_same_v<_Tp, _Tp> =
true;
3513template <
typename _Base,
typename _Derived>
3514 inline constexpr bool is_base_of_v = __is_base_of(_Base, _Derived);
3515#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_convertible)
3516template <
typename _From,
typename _To>
3517 inline constexpr bool is_convertible_v = __is_convertible(_From, _To);
3519template <
typename _From,
typename _To>
3520 inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value;
3522template<
typename _Fn,
typename... _Args>
3523 inline constexpr bool is_invocable_v = is_invocable<_Fn, _Args...>::value;
3524template<
typename _Fn,
typename... _Args>
3525 inline constexpr bool is_nothrow_invocable_v
3526 = is_nothrow_invocable<_Fn, _Args...>::value;
3527template<
typename _Ret,
typename _Fn,
typename... _Args>
3528 inline constexpr bool is_invocable_r_v
3529 = is_invocable_r<_Ret, _Fn, _Args...>::value;
3530template<
typename _Ret,
typename _Fn,
typename... _Args>
3531 inline constexpr bool is_nothrow_invocable_r_v
3532 = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value;
3536#ifdef __cpp_lib_has_unique_object_representations
3539 template<typename _Tp>
3540 struct has_unique_object_representations
3541 : bool_constant<__has_unique_object_representations(
3542 remove_cv_t<remove_all_extents_t<_Tp>>
3545 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
3546 "template argument must be a complete class or an unbounded array");
3549# if __cpp_lib_type_trait_variable_templates
3551 template<typename _Tp>
3552 inline constexpr bool has_unique_object_representations_v
3553 = has_unique_object_representations<_Tp>::value;
3557#ifdef __cpp_lib_is_aggregate
3560 template<typename _Tp>
3562 : bool_constant<__is_aggregate(remove_cv_t<_Tp>)>
3565# if __cpp_lib_type_trait_variable_templates
3570 template<
typename _Tp>
3571 inline constexpr bool is_aggregate_v = __is_aggregate(remove_cv_t<_Tp>);
3579#ifdef __cpp_lib_remove_cvref
3580# if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_cvref)
3581 template<
typename _Tp>
3583 {
using type = __remove_cvref(_Tp); };
3585 template<
typename _Tp>
3587 {
using type =
typename remove_cv<_Tp>::type; };
3589 template<
typename _Tp>
3590 struct remove_cvref<_Tp&>
3591 {
using type =
typename remove_cv<_Tp>::type; };
3593 template<
typename _Tp>
3594 struct remove_cvref<_Tp&&>
3595 {
using type =
typename remove_cv<_Tp>::type; };
3598 template<
typename _Tp>
3599 using remove_cvref_t =
typename remove_cvref<_Tp>::type;
3603#ifdef __cpp_lib_type_identity
3608 template<
typename _Tp>
3609 struct type_identity {
using type = _Tp; };
3611 template<
typename _Tp>
3612 using type_identity_t =
typename type_identity<_Tp>::type;
3616#ifdef __cpp_lib_unwrap_ref
3621 template<
typename _Tp>
3622 struct unwrap_reference {
using type = _Tp; };
3624 template<
typename _Tp>
3625 struct unwrap_reference<reference_wrapper<_Tp>> {
using type = _Tp&; };
3627 template<
typename _Tp>
3628 using unwrap_reference_t =
typename unwrap_reference<_Tp>::type;
3635 template<
typename _Tp>
3636 struct unwrap_ref_decay {
using type = unwrap_reference_t<decay_t<_Tp>>; };
3638 template<
typename _Tp>
3639 using unwrap_ref_decay_t =
typename unwrap_ref_decay<_Tp>::type;
3643#ifdef __cpp_lib_bounded_array_traits
3647# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_bounded_array)
3648 template<
typename _Tp>
3649 inline constexpr bool is_bounded_array_v = __is_bounded_array(_Tp);
3651 template<
typename _Tp>
3652 inline constexpr bool is_bounded_array_v =
false;
3654 template<
typename _Tp,
size_t _Size>
3655 inline constexpr bool is_bounded_array_v<_Tp[_Size]> =
true;
3661 template<
typename _Tp>
3662 inline constexpr bool is_unbounded_array_v =
false;
3664 template<
typename _Tp>
3665 inline constexpr bool is_unbounded_array_v<_Tp[]> =
true;
3669 template<
typename _Tp>
3670 struct is_bounded_array
3671 :
public bool_constant<is_bounded_array_v<_Tp>>
3676 template<
typename _Tp>
3677 struct is_unbounded_array
3678 :
public bool_constant<is_unbounded_array_v<_Tp>>
3682#if __has_builtin(__is_layout_compatible) && __cplusplus >= 202002L
3685 template<
typename _Tp,
typename _Up>
3687 : bool_constant<__is_layout_compatible(_Tp, _Up)>
3692 template<
typename _Tp,
typename _Up>
3694 = __is_layout_compatible(_Tp, _Up);
3696#if __has_builtin(__builtin_is_corresponding_member)
3697# ifndef __cpp_lib_is_layout_compatible
3698# error "libstdc++ bug: is_corresponding_member and is_layout_compatible are provided but their FTM is not set"
3702 template<
typename _S1,
typename _S2,
typename _M1,
typename _M2>
3705 {
return __builtin_is_corresponding_member(__m1, __m2); }
3709#if __has_builtin(__is_pointer_interconvertible_base_of) \
3710 && __cplusplus >= 202002L
3713 template<
typename _Base,
typename _Derived>
3715 : bool_constant<__is_pointer_interconvertible_base_of(_Base, _Derived)>
3720 template<
typename _Base,
typename _Derived>
3722 = __is_pointer_interconvertible_base_of(_Base, _Derived);
3724#if __has_builtin(__builtin_is_pointer_interconvertible_with_class)
3725# ifndef __cpp_lib_is_pointer_interconvertible
3726# error "libstdc++ bug: is_pointer_interconvertible available but FTM is not set"
3732 template<
typename _Tp,
typename _Mem>
3735 {
return __builtin_is_pointer_interconvertible_with_class(__mp); }
3739#ifdef __cpp_lib_is_scoped_enum
3743# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum)
3744 template<
typename _Tp>
3745 struct is_scoped_enum
3746 : bool_constant<__is_scoped_enum(_Tp)>
3749 template<
typename _Tp>
3750 struct is_scoped_enum
3754 template<
typename _Tp>
3755 requires __is_enum(_Tp)
3756 &&
requires(remove_cv_t<_Tp> __t) { __t = __t; }
3757 struct is_scoped_enum<_Tp>
3758 : bool_constant<!requires(_Tp __t, void(*__f)(int)) { __f(__t); }>
3764# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum)
3765 template<
typename _Tp>
3766 inline constexpr bool is_scoped_enum_v = __is_scoped_enum(_Tp);
3768 template<
typename _Tp>
3769 inline constexpr bool is_scoped_enum_v = is_scoped_enum<_Tp>::value;
3773#ifdef __cpp_lib_reference_from_temporary
3778 template<typename _Tp, typename _Up>
3779 struct reference_constructs_from_temporary
3780 :
public bool_constant<__reference_constructs_from_temporary(_Tp, _Up)>
3782 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{})
3783 && std::__is_complete_or_unbounded(__type_identity<_Up>{}),
3784 "template argument must be a complete class or an unbounded array");
3791 template<
typename _Tp,
typename _Up>
3792 struct reference_converts_from_temporary
3793 :
public bool_constant<__reference_converts_from_temporary(_Tp, _Up)>
3795 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{})
3796 && std::__is_complete_or_unbounded(__type_identity<_Up>{}),
3797 "template argument must be a complete class or an unbounded array");
3802 template<
typename _Tp,
typename _Up>
3803 inline constexpr bool reference_constructs_from_temporary_v
3804 = reference_constructs_from_temporary<_Tp, _Up>::value;
3808 template<
typename _Tp,
typename _Up>
3809 inline constexpr bool reference_converts_from_temporary_v
3810 = reference_converts_from_temporary<_Tp, _Up>::value;
3813#ifdef __cpp_lib_is_constant_evaluated
3816 constexpr inline bool
3817 is_constant_evaluated() noexcept
3819#if __cpp_if_consteval >= 202106L
3820 if consteval {
return true; }
else {
return false; }
3822 return __builtin_is_constant_evaluated();
3827#if __cplusplus >= 202002L
3829 template<
typename _From,
typename _To>
3830 using __copy_cv =
typename __match_cv_qualifiers<_From, _To>::__type;
3832 template<
typename _Xp,
typename _Yp>
3834 =
decltype(
false ? declval<_Xp(&)()>()() :
declval<_Yp(&)()>()());
3836 template<
typename _Ap,
typename _Bp,
typename =
void>
3837 struct __common_ref_impl
3841 template<
typename _Ap,
typename _Bp>
3842 using __common_ref =
typename __common_ref_impl<_Ap, _Bp>::type;
3845 template<
typename _Xp,
typename _Yp>
3846 using __condres_cvref
3847 = __cond_res<__copy_cv<_Xp, _Yp>&, __copy_cv<_Yp, _Xp>&>;
3850 template<
typename _Xp,
typename _Yp>
3851 struct __common_ref_impl<_Xp&, _Yp&, __void_t<__condres_cvref<_Xp, _Yp>>>
3852 : enable_if<is_reference_v<__condres_cvref<_Xp, _Yp>>,
3853 __condres_cvref<_Xp, _Yp>>
3857 template<
typename _Xp,
typename _Yp>
3858 using __common_ref_C = remove_reference_t<__common_ref<_Xp&, _Yp&>>&&;
3861 template<
typename _Xp,
typename _Yp>
3862 struct __common_ref_impl<_Xp&&, _Yp&&,
3863 _Require<is_convertible<_Xp&&, __common_ref_C<_Xp, _Yp>>,
3864 is_convertible<_Yp&&, __common_ref_C<_Xp, _Yp>>>>
3865 {
using type = __common_ref_C<_Xp, _Yp>; };
3868 template<
typename _Xp,
typename _Yp>
3869 using __common_ref_D = __common_ref<const _Xp&, _Yp&>;
3872 template<
typename _Xp,
typename _Yp>
3873 struct __common_ref_impl<_Xp&&, _Yp&,
3874 _Require<is_convertible<_Xp&&, __common_ref_D<_Xp, _Yp>>>>
3875 {
using type = __common_ref_D<_Xp, _Yp>; };
3878 template<
typename _Xp,
typename _Yp>
3879 struct __common_ref_impl<_Xp&, _Yp&&>
3880 : __common_ref_impl<_Yp&&, _Xp&>
3884 template<
typename _Tp,
typename _Up,
3885 template<
typename>
class _TQual,
template<
typename>
class _UQual>
3886 struct basic_common_reference
3890 template<
typename _Tp>
3892 {
template<
typename _Up>
using __type = __copy_cv<_Tp, _Up>; };
3894 template<
typename _Tp>
3896 {
template<
typename _Up>
using __type = __copy_cv<_Tp, _Up>&; };
3898 template<
typename _Tp>
3899 struct __xref<_Tp&&>
3900 {
template<
typename _Up>
using __type = __copy_cv<_Tp, _Up>&&; };
3902 template<
typename _Tp1,
typename _Tp2>
3903 using __basic_common_ref
3904 =
typename basic_common_reference<remove_cvref_t<_Tp1>,
3905 remove_cvref_t<_Tp2>,
3906 __xref<_Tp1>::template __type,
3907 __xref<_Tp2>::template __type>::type;
3910 template<
typename... _Tp>
3911 struct common_reference;
3913 template<
typename... _Tp>
3918 struct common_reference<>
3922 template<
typename _Tp0>
3923 struct common_reference<_Tp0>
3924 {
using type = _Tp0; };
3927 template<
typename _Tp1,
typename _Tp2,
int _Bullet = 1,
typename =
void>
3928 struct __common_reference_impl
3929 : __common_reference_impl<_Tp1, _Tp2, _Bullet + 1>
3933 template<
typename _Tp1,
typename _Tp2>
3934 struct common_reference<_Tp1, _Tp2>
3935 : __common_reference_impl<_Tp1, _Tp2>
3939 template<
typename _Tp1,
typename _Tp2>
3940 struct __common_reference_impl<_Tp1&, _Tp2&, 1,
3941 void_t<__common_ref<_Tp1&, _Tp2&>>>
3942 {
using type = __common_ref<_Tp1&, _Tp2&>; };
3944 template<
typename _Tp1,
typename _Tp2>
3945 struct __common_reference_impl<_Tp1&&, _Tp2&&, 1,
3946 void_t<__common_ref<_Tp1&&, _Tp2&&>>>
3947 {
using type = __common_ref<_Tp1&&, _Tp2&&>; };
3949 template<
typename _Tp1,
typename _Tp2>
3950 struct __common_reference_impl<_Tp1&, _Tp2&&, 1,
3951 void_t<__common_ref<_Tp1&, _Tp2&&>>>
3952 {
using type = __common_ref<_Tp1&, _Tp2&&>; };
3954 template<
typename _Tp1,
typename _Tp2>
3955 struct __common_reference_impl<_Tp1&&, _Tp2&, 1,
3956 void_t<__common_ref<_Tp1&&, _Tp2&>>>
3957 {
using type = __common_ref<_Tp1&&, _Tp2&>; };
3960 template<
typename _Tp1,
typename _Tp2>
3961 struct __common_reference_impl<_Tp1, _Tp2, 2,
3962 void_t<__basic_common_ref<_Tp1, _Tp2>>>
3963 {
using type = __basic_common_ref<_Tp1, _Tp2>; };
3966 template<
typename _Tp1,
typename _Tp2>
3967 struct __common_reference_impl<_Tp1, _Tp2, 3,
3968 void_t<__cond_res<_Tp1, _Tp2>>>
3969 {
using type = __cond_res<_Tp1, _Tp2>; };
3972 template<
typename _Tp1,
typename _Tp2>
3973 struct __common_reference_impl<_Tp1, _Tp2, 4,
3975 {
using type = common_type_t<_Tp1, _Tp2>; };
3978 template<
typename _Tp1,
typename _Tp2>
3979 struct __common_reference_impl<_Tp1, _Tp2, 5, void>
3983 template<
typename _Tp1,
typename _Tp2,
typename... _Rest>
3984 struct common_reference<_Tp1, _Tp2, _Rest...>
3985 : __common_type_fold<common_reference<_Tp1, _Tp2>,
3986 __common_type_pack<_Rest...>>
3990 template<
typename _Tp1,
typename _Tp2,
typename... _Rest>
3991 struct __common_type_fold<common_reference<_Tp1, _Tp2>,
3992 __common_type_pack<_Rest...>,
3994 :
public common_reference<common_reference_t<_Tp1, _Tp2>, _Rest...>
4002_GLIBCXX_END_NAMESPACE_VERSION
typename common_reference< _Tp... >::type common_reference_t
constexpr bool is_corresponding_member(_M1 _S1::*__m1, _M2 _S2::*__m2) noexcept
typename remove_reference< _Tp >::type remove_reference_t
Alias template for remove_reference.
typename result_of< _Tp >::type result_of_t
Alias template for result_of.
typename add_rvalue_reference< _Tp >::type add_rvalue_reference_t
Alias template for add_rvalue_reference.
typename make_unsigned< _Tp >::type make_unsigned_t
Alias template for make_unsigned.
__bool_constant< true > true_type
The type used as a compile-time boolean with true value.
typename aligned_storage< _Len, _Align >::type aligned_storage_t
Alias template for aligned_storage.
typename remove_all_extents< _Tp >::type remove_all_extents_t
Alias template for remove_all_extents.
typename common_type< _Tp... >::type common_type_t
Alias template for common_type.
typename conditional< _Cond, _Iftrue, _Iffalse >::type conditional_t
Alias template for conditional.
typename aligned_storage< _S_len, alignment_value >::type type
The storage.
typename remove_pointer< _Tp >::type remove_pointer_t
Alias template for remove_pointer.
typename add_lvalue_reference< _Tp >::type add_lvalue_reference_t
Alias template for add_lvalue_reference.
__bool_constant< false > false_type
The type used as a compile-time boolean with false value.
typename add_pointer< _Tp >::type add_pointer_t
Alias template for add_pointer.
typename remove_extent< _Tp >::type remove_extent_t
Alias template for remove_extent.
typename underlying_type< _Tp >::type underlying_type_t
Alias template for underlying_type.
typename decay< _Tp >::type decay_t
Alias template for decay.
typename make_signed< _Tp >::type make_signed_t
Alias template for make_signed.
constexpr bool is_pointer_interconvertible_with_class(_Mem _Tp::*__mp) noexcept
True if __mp points to the first member of a standard-layout type.
typename enable_if< _Cond, _Tp >::type enable_if_t
Alias template for enable_if.
constexpr bool is_layout_compatible_v
constexpr bool is_pointer_interconvertible_base_of_v
auto declval() noexcept -> decltype(__declval< _Tp >(0))
void void_t
A metafunction that always yields void, used for detecting valid types.
ISO C++ entities toplevel namespace is std.
GNU extensions for public use.
Define a member typedef type only if a boolean constant is true.
is_member_function_pointer
is_nothrow_default_constructible
is_nothrow_copy_constructible
is_nothrow_move_constructible
is_nothrow_copy_assignable
is_nothrow_move_assignable
is_trivially_constructible
is_trivially_default_constructible
is_trivially_copy_constructible
is_trivially_move_constructible
is_trivially_copy_assignable
is_trivially_move_assignable
is_trivially_destructible
Provide aligned storage for types.
Define a member typedef type to one of two argument types.
The underlying type of an enum.
True if _Derived is standard-layout and has a base class of type _Base