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 template<
typename _Tp,
typename _Up>
1475#ifdef _GLIBCXX_HAVE_BUILTIN_IS_SAME
1476 :
public __bool_constant<__is_same(_Tp, _Up)>
1482#ifndef _GLIBCXX_HAVE_BUILTIN_IS_SAME
1483 template<
typename _Tp>
1490 template<
typename _Base,
typename _Derived>
1492 :
public __bool_constant<__is_base_of(_Base, _Derived)>
1495#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_convertible)
1496 template<
typename _From,
typename _To>
1498 :
public __bool_constant<__is_convertible(_From, _To)>
1501 template<
typename _From,
typename _To,
1502 bool = __or_<is_void<_From>, is_function<_To>,
1503 is_array<_To>>::value>
1504 struct __is_convertible_helper
1506 using type =
typename is_void<_To>::type;
1509#pragma GCC diagnostic push
1510#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
1511 template<
typename _From,
typename _To>
1512 class __is_convertible_helper<_From, _To, false>
1514 template<
typename _To1>
1515 static void __test_aux(_To1)
noexcept;
1517 template<
typename _From1,
typename _To1,
1518 typename =
decltype(__test_aux<_To1>(std::declval<_From1>()))>
1522 template<
typename,
typename>
1527 using type =
decltype(__test<_From, _To>(0));
1529#pragma GCC diagnostic pop
1532 template<
typename _From,
typename _To>
1534 :
public __is_convertible_helper<_From, _To>::type
1539 template<
typename _ToElementType,
typename _FromElementType>
1540 using __is_array_convertible
1543#ifdef __cpp_lib_is_nothrow_convertible
1545#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_nothrow_convertible)
1547 template<
typename _From,
typename _To>
1548 inline constexpr bool is_nothrow_convertible_v
1549 = __is_nothrow_convertible(_From, _To);
1552 template<
typename _From,
typename _To>
1553 struct is_nothrow_convertible
1554 :
public bool_constant<is_nothrow_convertible_v<_From, _To>>
1557 template<
typename _From,
typename _To,
1558 bool = __or_<is_void<_From>, is_function<_To>,
1559 is_array<_To>>::value>
1560 struct __is_nt_convertible_helper
1564#pragma GCC diagnostic push
1565#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
1566 template<
typename _From,
typename _To>
1567 class __is_nt_convertible_helper<_From, _To, false>
1569 template<
typename _To1>
1570 static void __test_aux(_To1)
noexcept;
1572 template<
typename _From1,
typename _To1>
1574 __bool_constant<noexcept(__test_aux<_To1>(std::declval<_From1>()))>
1577 template<
typename,
typename>
1582 using type =
decltype(__test<_From, _To>(0));
1584#pragma GCC diagnostic pop
1587 template<
typename _From,
typename _To>
1588 struct is_nothrow_convertible
1589 :
public __is_nt_convertible_helper<_From, _To>::type
1593 template<
typename _From,
typename _To>
1594 inline constexpr bool is_nothrow_convertible_v
1595 = is_nothrow_convertible<_From, _To>::value;
1602 template<
typename _Tp>
1604 {
using type = _Tp; };
1606 template<
typename _Tp>
1608 {
using type = _Tp; };
1611 template<
typename _Tp>
1613 {
using type = _Tp; };
1615 template<
typename _Tp>
1617 {
using type = _Tp; };
1620#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_cv)
1621 template<
typename _Tp>
1623 {
using type = __remove_cv(_Tp); };
1625 template<
typename _Tp>
1627 {
using type = _Tp; };
1629 template<
typename _Tp>
1631 {
using type = _Tp; };
1633 template<
typename _Tp>
1634 struct remove_cv<volatile _Tp>
1635 {
using type = _Tp; };
1637 template<
typename _Tp>
1638 struct remove_cv<const volatile _Tp>
1639 {
using type = _Tp; };
1643 template<
typename _Tp>
1645 {
using type = _Tp
const; };
1648 template<
typename _Tp>
1650 {
using type = _Tp
volatile; };
1653 template<
typename _Tp>
1655 {
using type = _Tp
const volatile; };
1657#ifdef __cpp_lib_transformation_trait_aliases
1659 template<typename _Tp>
1660 using remove_const_t =
typename remove_const<_Tp>::type;
1663 template<
typename _Tp>
1664 using remove_volatile_t =
typename remove_volatile<_Tp>::type;
1667 template<
typename _Tp>
1668 using remove_cv_t =
typename remove_cv<_Tp>::type;
1671 template<
typename _Tp>
1672 using add_const_t =
typename add_const<_Tp>::type;
1675 template<
typename _Tp>
1676 using add_volatile_t =
typename add_volatile<_Tp>::type;
1679 template<
typename _Tp>
1680 using add_cv_t =
typename add_cv<_Tp>::type;
1686#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_reference)
1687 template<
typename _Tp>
1689 {
using type = __remove_reference(_Tp); };
1691 template<
typename _Tp>
1693 {
using type = _Tp; };
1695 template<
typename _Tp>
1697 {
using type = _Tp; };
1699 template<
typename _Tp>
1700 struct remove_reference<_Tp&&>
1701 {
using type = _Tp; };
1705 template<
typename _Tp>
1707 {
using type = __add_lval_ref_t<_Tp>; };
1710 template<
typename _Tp>
1712 {
using type = __add_rval_ref_t<_Tp>; };
1714#if __cplusplus > 201103L
1716 template<
typename _Tp>
1720 template<
typename _Tp>
1724 template<
typename _Tp>
1733 template<
typename _Unqualified,
bool _IsConst,
bool _IsVol>
1734 struct __cv_selector;
1736 template<
typename _Unqualified>
1737 struct __cv_selector<_Unqualified, false, false>
1738 {
using __type = _Unqualified; };
1740 template<
typename _Unqualified>
1741 struct __cv_selector<_Unqualified, false, true>
1742 {
using __type =
volatile _Unqualified; };
1744 template<
typename _Unqualified>
1745 struct __cv_selector<_Unqualified, true, false>
1746 {
using __type =
const _Unqualified; };
1748 template<
typename _Unqualified>
1749 struct __cv_selector<_Unqualified, true, true>
1750 {
using __type =
const volatile _Unqualified; };
1752 template<
typename _Qualified,
typename _Unqualified,
1753 bool _IsConst = is_const<_Qualified>::value,
1754 bool _IsVol = is_volatile<_Qualified>::value>
1755 class __match_cv_qualifiers
1757 using __match = __cv_selector<_Unqualified, _IsConst, _IsVol>;
1760 using __type =
typename __match::__type;
1764 template<
typename _Tp>
1765 struct __make_unsigned
1766 {
using __type = _Tp; };
1769 struct __make_unsigned<char>
1770 {
using __type =
unsigned char; };
1773 struct __make_unsigned<signed char>
1774 {
using __type =
unsigned char; };
1777 struct __make_unsigned<short>
1778 {
using __type =
unsigned short; };
1781 struct __make_unsigned<int>
1782 {
using __type =
unsigned int; };
1785 struct __make_unsigned<long>
1786 {
using __type =
unsigned long; };
1789 struct __make_unsigned<long long>
1790 {
using __type =
unsigned long long; };
1792#if defined(__GLIBCXX_TYPE_INT_N_0)
1795 struct __make_unsigned<__GLIBCXX_TYPE_INT_N_0>
1796 {
using __type =
unsigned __GLIBCXX_TYPE_INT_N_0; };
1798#if defined(__GLIBCXX_TYPE_INT_N_1)
1801 struct __make_unsigned<__GLIBCXX_TYPE_INT_N_1>
1802 {
using __type =
unsigned __GLIBCXX_TYPE_INT_N_1; };
1804#if defined(__GLIBCXX_TYPE_INT_N_2)
1807 struct __make_unsigned<__GLIBCXX_TYPE_INT_N_2>
1808 {
using __type =
unsigned __GLIBCXX_TYPE_INT_N_2; };
1810#if defined(__GLIBCXX_TYPE_INT_N_3)
1813 struct __make_unsigned<__GLIBCXX_TYPE_INT_N_3>
1814 {
using __type =
unsigned __GLIBCXX_TYPE_INT_N_3; };
1818 template<
typename _Tp,
1819 bool _IsInt = is_integral<_Tp>::value,
1820 bool _IsEnum = __is_enum(_Tp)>
1821 class __make_unsigned_selector;
1823 template<
typename _Tp>
1824 class __make_unsigned_selector<_Tp, true, false>
1826 using __unsigned_type
1827 =
typename __make_unsigned<__remove_cv_t<_Tp>>::__type;
1831 =
typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type;
1834 class __make_unsigned_selector_base
1837 template<
typename...>
struct _List { };
1839 template<
typename _Tp,
typename... _Up>
1840 struct _List<_Tp, _Up...> : _List<_Up...>
1841 {
static constexpr size_t __size =
sizeof(_Tp); };
1843 template<
size_t _Sz,
typename _Tp,
bool = (_Sz <= _Tp::__size)>
1846 template<
size_t _Sz,
typename _U
int,
typename... _UInts>
1847 struct __select<_Sz, _List<_Uint, _UInts...>,
true>
1848 {
using __type = _Uint; };
1850 template<
size_t _Sz,
typename _Uint,
typename... _UInts>
1851 struct __select<_Sz, _List<_Uint, _UInts...>, false>
1852 : __select<_Sz, _List<_UInts...>>
1857 template<
typename _Tp>
1858 class __make_unsigned_selector<_Tp, false, true>
1859 : __make_unsigned_selector_base
1862 using _UInts = _List<
unsigned char,
unsigned short,
unsigned int,
1863 unsigned long,
unsigned long long>;
1865 using __unsigned_type =
typename __select<
sizeof(_Tp), _UInts>::__type;
1869 =
typename __match_cv_qualifiers<_Tp, __unsigned_type>::__type;
1877 struct __make_unsigned<wchar_t>
1880 =
typename __make_unsigned_selector<wchar_t, false, true>::__type;
1883#ifdef _GLIBCXX_USE_CHAR8_T
1885 struct __make_unsigned<char8_t>
1888 =
typename __make_unsigned_selector<char8_t, false, true>::__type;
1893 struct __make_unsigned<char16_t>
1896 =
typename __make_unsigned_selector<char16_t, false, true>::__type;
1900 struct __make_unsigned<char32_t>
1903 =
typename __make_unsigned_selector<char32_t, false, true>::__type;
1911 template<
typename _Tp>
1913 {
using type =
typename __make_unsigned_selector<_Tp>::__type; };
1924 template<
typename _Tp>
1925 struct __make_signed
1926 {
using __type = _Tp; };
1929 struct __make_signed<char>
1930 {
using __type =
signed char; };
1933 struct __make_signed<unsigned char>
1934 {
using __type =
signed char; };
1937 struct __make_signed<unsigned short>
1938 {
using __type =
signed short; };
1941 struct __make_signed<unsigned int>
1942 {
using __type =
signed int; };
1945 struct __make_signed<unsigned long>
1946 {
using __type =
signed long; };
1949 struct __make_signed<unsigned long long>
1950 {
using __type =
signed long long; };
1952#if defined(__GLIBCXX_TYPE_INT_N_0)
1955 struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_0>
1956 {
using __type = __GLIBCXX_TYPE_INT_N_0; };
1958#if defined(__GLIBCXX_TYPE_INT_N_1)
1961 struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_1>
1962 {
using __type = __GLIBCXX_TYPE_INT_N_1; };
1964#if defined(__GLIBCXX_TYPE_INT_N_2)
1967 struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_2>
1968 {
using __type = __GLIBCXX_TYPE_INT_N_2; };
1970#if defined(__GLIBCXX_TYPE_INT_N_3)
1973 struct __make_signed<unsigned __GLIBCXX_TYPE_INT_N_3>
1974 {
using __type = __GLIBCXX_TYPE_INT_N_3; };
1978 template<
typename _Tp,
1979 bool _IsInt = is_integral<_Tp>::value,
1980 bool _IsEnum = __is_enum(_Tp)>
1981 class __make_signed_selector;
1983 template<
typename _Tp>
1984 class __make_signed_selector<_Tp, true, false>
1987 =
typename __make_signed<__remove_cv_t<_Tp>>::__type;
1991 =
typename __match_cv_qualifiers<_Tp, __signed_type>::__type;
1995 template<
typename _Tp>
1996 class __make_signed_selector<_Tp, false, true>
1998 using __unsigned_type =
typename __make_unsigned_selector<_Tp>::__type;
2001 using __type =
typename __make_signed_selector<__unsigned_type>::__type;
2009 struct __make_signed<wchar_t>
2012 =
typename __make_signed_selector<wchar_t, false, true>::__type;
2015#if defined(_GLIBCXX_USE_CHAR8_T)
2017 struct __make_signed<char8_t>
2020 =
typename __make_signed_selector<char8_t, false, true>::__type;
2025 struct __make_signed<char16_t>
2028 =
typename __make_signed_selector<char16_t, false, true>::__type;
2032 struct __make_signed<char32_t>
2035 =
typename __make_signed_selector<char32_t, false, true>::__type;
2043 template<
typename _Tp>
2045 {
using type =
typename __make_signed_selector<_Tp>::__type; };
2051 template<>
struct make_signed<bool const volatile>;
2053#if __cplusplus > 201103L
2055 template<
typename _Tp>
2059 template<
typename _Tp>
2066 template<
typename _Tp>
2068 {
using type = _Tp; };
2070 template<
typename _Tp, std::
size_t _Size>
2072 {
using type = _Tp; };
2074 template<
typename _Tp>
2075 struct remove_extent<_Tp[]>
2076 {
using type = _Tp; };
2079 template<
typename _Tp>
2081 {
using type = _Tp; };
2083 template<
typename _Tp, std::
size_t _Size>
2085 {
using type =
typename remove_all_extents<_Tp>::type; };
2087 template<
typename _Tp>
2088 struct remove_all_extents<_Tp[]>
2089 {
using type =
typename remove_all_extents<_Tp>::type; };
2091#if __cplusplus > 201103L
2093 template<
typename _Tp>
2097 template<
typename _Tp>
2104#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_pointer)
2105 template<
typename _Tp>
2106 struct remove_pointer
2107 {
using type = __remove_pointer(_Tp); };
2109 template<
typename _Tp,
typename>
2111 {
using type = _Tp; };
2113 template<
typename _Tp,
typename _Up>
2115 {
using type = _Up; };
2117 template<
typename _Tp>
2118 struct remove_pointer
2119 :
public __remove_pointer_helper<_Tp, __remove_cv_t<_Tp>>
2123 template<
typename _Tp,
typename =
void>
2124 struct __add_pointer_helper
2125 {
using type = _Tp; };
2127 template<
typename _Tp>
2128 struct __add_pointer_helper<_Tp, __void_t<_Tp*>>
2129 {
using type = _Tp*; };
2132 template<
typename _Tp>
2134 :
public __add_pointer_helper<_Tp>
2137 template<
typename _Tp>
2139 {
using type = _Tp*; };
2141 template<
typename _Tp>
2142 struct add_pointer<_Tp&&>
2143 {
using type = _Tp*; };
2145#if __cplusplus > 201103L
2147 template<
typename _Tp>
2151 template<
typename _Tp>
2155 template<std::
size_t _Len>
2156 struct __aligned_storage_msa
2160 unsigned char __data[_Len];
2161 struct __attribute__((__aligned__)) { } __align;
2178 template<std::size_t _Len, std::size_t _Align =
2179 __alignof__(
typename __aligned_storage_msa<_Len>::__type)>
2181 _GLIBCXX23_DEPRECATED
2186 unsigned char __data[_Len];
2187 struct __attribute__((__aligned__((_Align)))) { } __align;
2191 template <
typename... _Types>
2192 struct __strictest_alignment
2194 static const size_t _S_alignment = 0;
2195 static const size_t _S_size = 0;
2198 template <
typename _Tp,
typename... _Types>
2199 struct __strictest_alignment<_Tp, _Types...>
2201 static const size_t _S_alignment =
2202 alignof(_Tp) > __strictest_alignment<_Types...>::_S_alignment
2203 ?
alignof(_Tp) : __strictest_alignment<_Types...>::_S_alignment;
2204 static const size_t _S_size =
2205 sizeof(_Tp) > __strictest_alignment<_Types...>::_S_size
2206 ?
sizeof(_Tp) : __strictest_alignment<_Types...>::_S_size;
2209#pragma GCC diagnostic push
2210#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
2224 template <
size_t _Len,
typename... _Types>
2226 _GLIBCXX23_DEPRECATED
2230 static_assert(
sizeof...(_Types) != 0,
"At least one type is required");
2232 using __strictest = __strictest_alignment<_Types...>;
2233 static const size_t _S_len = _Len > __strictest::_S_size
2234 ? _Len : __strictest::_S_size;
2237 static const size_t alignment_value = __strictest::_S_alignment;
2242 template <
size_t _Len,
typename... _Types>
2243 const size_t aligned_union<_Len, _Types...>::alignment_value;
2244#pragma GCC diagnostic pop
2250 template<
typename _Up>
2251 struct __decay_selector
2252 : __conditional_t<is_const<const _Up>::value,
2257 template<
typename _Up,
size_t _Nm>
2258 struct __decay_selector<_Up[_Nm]>
2259 {
using type = _Up*; };
2261 template<
typename _Up>
2262 struct __decay_selector<_Up[]>
2263 {
using type = _Up*; };
2268 template<
typename _Tp>
2270 {
using type =
typename __decay_selector<_Tp>::type; };
2272 template<
typename _Tp>
2274 {
using type =
typename __decay_selector<_Tp>::type; };
2276 template<
typename _Tp>
2278 {
using type =
typename __decay_selector<_Tp>::type; };
2283 template<
typename _Tp>
2284 struct __strip_reference_wrapper
2289 template<
typename _Tp>
2290 struct __strip_reference_wrapper<reference_wrapper<_Tp> >
2292 using __type = _Tp&;
2296 template<
typename _Tp>
2297 using __decay_t =
typename decay<_Tp>::type;
2299 template<
typename _Tp>
2300 using __decay_and_strip = __strip_reference_wrapper<__decay_t<_Tp>>;
2306 template<
typename... _Cond>
2307 using _Require = __enable_if_t<__and_<_Cond...>::value>;
2310 template<
typename _Tp>
2311 using __remove_cvref_t
2312 =
typename remove_cv<typename remove_reference<_Tp>::type>::type;
2317 template<
bool _Cond,
typename _Iftrue,
typename _Iffalse>
2319 {
using type = _Iftrue; };
2322 template<
typename _Iftrue,
typename _Iffalse>
2324 {
using type = _Iffalse; };
2327 template<
typename... _Tp>
2339 template<
typename _Tp>
2340 struct __success_type
2341 {
using type = _Tp; };
2343 struct __failure_type
2346 struct __do_common_type_impl
2348 template<
typename _Tp,
typename _Up>
2350 =
decltype(
true ? std::declval<_Tp>() :
std::declval<_Up>());
2354 template<
typename _Tp,
typename _Up>
2355 static __success_type<__decay_t<__cond_t<_Tp, _Up>>>
2358#if __cplusplus > 201703L
2361 template<
typename _Tp,
typename _Up>
2362 static __success_type<__remove_cvref_t<__cond_t<const _Tp&, const _Up&>>>
2366 template<
typename,
typename>
2367 static __failure_type
2370 template<
typename _Tp,
typename _Up>
2371 static decltype(_S_test_2<_Tp, _Up>(0))
2377 struct common_type<>
2381 template<
typename _Tp0>
2382 struct common_type<_Tp0>
2383 :
public common_type<_Tp0, _Tp0>
2387 template<
typename _Tp1,
typename _Tp2,
2388 typename _Dp1 = __decay_t<_Tp1>,
typename _Dp2 = __decay_t<_Tp2>>
2389 struct __common_type_impl
2393 using type = common_type<_Dp1, _Dp2>;
2396 template<
typename _Tp1,
typename _Tp2>
2397 struct __common_type_impl<_Tp1, _Tp2, _Tp1, _Tp2>
2398 :
private __do_common_type_impl
2402 using type =
decltype(_S_test<_Tp1, _Tp2>(0));
2406 template<
typename _Tp1,
typename _Tp2>
2407 struct common_type<_Tp1, _Tp2>
2408 :
public __common_type_impl<_Tp1, _Tp2>::type
2411 template<
typename...>
2412 struct __common_type_pack
2415 template<
typename,
typename,
typename =
void>
2416 struct __common_type_fold;
2419 template<
typename _Tp1,
typename _Tp2,
typename... _Rp>
2420 struct common_type<_Tp1, _Tp2, _Rp...>
2421 :
public __common_type_fold<common_type<_Tp1, _Tp2>,
2422 __common_type_pack<_Rp...>>
2428 template<
typename _CTp,
typename... _Rp>
2429 struct __common_type_fold<_CTp, __common_type_pack<_Rp...>,
2430 __void_t<typename _CTp::type>>
2431 :
public common_type<typename _CTp::type, _Rp...>
2435 template<
typename _CTp,
typename _Rp>
2436 struct __common_type_fold<_CTp, _Rp, void>
2439 template<
typename _Tp,
bool = __is_enum(_Tp)>
2440 struct __underlying_type_impl
2442 using type = __underlying_type(_Tp);
2445 template<
typename _Tp>
2446 struct __underlying_type_impl<_Tp, false>
2451 template<
typename _Tp>
2453 :
public __underlying_type_impl<_Tp>
2457 template<
typename _Tp>
2458 struct __declval_protector
2460 static const bool __stop =
false;
2468 template<
typename _Tp>
2469 auto declval() noexcept -> decltype(__declval<_Tp>(0))
2471 static_assert(__declval_protector<_Tp>::__stop,
2472 "declval() must not be used!");
2473 return __declval<_Tp>(0);
2477 template<
typename _Signature>
2483 struct __invoke_memfun_ref { };
2484 struct __invoke_memfun_deref { };
2485 struct __invoke_memobj_ref { };
2486 struct __invoke_memobj_deref { };
2487 struct __invoke_other { };
2490 template<
typename _Tp,
typename _Tag>
2491 struct __result_of_success : __success_type<_Tp>
2492 {
using __invoke_type = _Tag; };
2495 struct __result_of_memfun_ref_impl
2497 template<
typename _Fp,
typename _Tp1,
typename... _Args>
2498 static __result_of_success<
decltype(
2499 (std::declval<_Tp1>().*std::declval<_Fp>())(std::declval<_Args>()...)
2500 ), __invoke_memfun_ref> _S_test(
int);
2502 template<
typename...>
2503 static __failure_type _S_test(...);
2506 template<
typename _MemPtr,
typename _Arg,
typename... _Args>
2507 struct __result_of_memfun_ref
2508 :
private __result_of_memfun_ref_impl
2510 using type =
decltype(_S_test<_MemPtr, _Arg, _Args...>(0));
2514 struct __result_of_memfun_deref_impl
2516 template<
typename _Fp,
typename _Tp1,
typename... _Args>
2517 static __result_of_success<
decltype(
2518 ((*std::declval<_Tp1>()).*std::declval<_Fp>())(std::declval<_Args>()...)
2519 ), __invoke_memfun_deref> _S_test(
int);
2521 template<
typename...>
2522 static __failure_type _S_test(...);
2525 template<
typename _MemPtr,
typename _Arg,
typename... _Args>
2526 struct __result_of_memfun_deref
2527 :
private __result_of_memfun_deref_impl
2529 using type =
decltype(_S_test<_MemPtr, _Arg, _Args...>(0));
2533 struct __result_of_memobj_ref_impl
2535 template<
typename _Fp,
typename _Tp1>
2536 static __result_of_success<
decltype(
2537 std::declval<_Tp1>().*std::declval<_Fp>()
2538 ), __invoke_memobj_ref> _S_test(
int);
2540 template<
typename,
typename>
2541 static __failure_type _S_test(...);
2544 template<
typename _MemPtr,
typename _Arg>
2545 struct __result_of_memobj_ref
2546 :
private __result_of_memobj_ref_impl
2548 using type =
decltype(_S_test<_MemPtr, _Arg>(0));
2552 struct __result_of_memobj_deref_impl
2554 template<
typename _Fp,
typename _Tp1>
2555 static __result_of_success<
decltype(
2556 (*std::declval<_Tp1>()).*std::declval<_Fp>()
2557 ), __invoke_memobj_deref> _S_test(
int);
2559 template<
typename,
typename>
2560 static __failure_type _S_test(...);
2563 template<
typename _MemPtr,
typename _Arg>
2564 struct __result_of_memobj_deref
2565 :
private __result_of_memobj_deref_impl
2567 using type =
decltype(_S_test<_MemPtr, _Arg>(0));
2570 template<
typename _MemPtr,
typename _Arg>
2571 struct __result_of_memobj;
2573 template<
typename _Res,
typename _Class,
typename _Arg>
2574 struct __result_of_memobj<_Res _Class::*, _Arg>
2576 using _Argval = __remove_cvref_t<_Arg>;
2577 using _MemPtr = _Res _Class::*;
2578 using type =
typename __conditional_t<__or_<is_same<_Argval, _Class>,
2579 is_base_of<_Class, _Argval>>::value,
2580 __result_of_memobj_ref<_MemPtr, _Arg>,
2581 __result_of_memobj_deref<_MemPtr, _Arg>
2585 template<
typename _MemPtr,
typename _Arg,
typename... _Args>
2586 struct __result_of_memfun;
2588 template<
typename _Res,
typename _Class,
typename _Arg,
typename... _Args>
2589 struct __result_of_memfun<_Res _Class::*, _Arg, _Args...>
2591 using _Argval =
typename remove_reference<_Arg>::type;
2592 using _MemPtr = _Res _Class::*;
2593 using type =
typename __conditional_t<is_base_of<_Class, _Argval>::value,
2594 __result_of_memfun_ref<_MemPtr, _Arg, _Args...>,
2595 __result_of_memfun_deref<_MemPtr, _Arg, _Args...>
2604 template<
typename _Tp,
typename _Up = __remove_cvref_t<_Tp>>
2610 template<
typename _Tp,
typename _Up>
2611 struct __inv_unwrap<_Tp, reference_wrapper<_Up>>
2616 template<bool, bool,
typename _Functor,
typename... _ArgTypes>
2617 struct __result_of_impl
2619 using type = __failure_type;
2622 template<
typename _MemPtr,
typename _Arg>
2623 struct __result_of_impl<true, false, _MemPtr, _Arg>
2624 :
public __result_of_memobj<__decay_t<_MemPtr>,
2625 typename __inv_unwrap<_Arg>::type>
2628 template<
typename _MemPtr,
typename _Arg,
typename... _Args>
2629 struct __result_of_impl<false, true, _MemPtr, _Arg, _Args...>
2630 :
public __result_of_memfun<__decay_t<_MemPtr>,
2631 typename __inv_unwrap<_Arg>::type, _Args...>
2635 struct __result_of_other_impl
2637 template<
typename _Fn,
typename... _Args>
2638 static __result_of_success<
decltype(
2639 std::declval<_Fn>()(std::declval<_Args>()...)
2640 ), __invoke_other> _S_test(
int);
2642 template<
typename...>
2643 static __failure_type _S_test(...);
2646 template<
typename _Functor,
typename... _ArgTypes>
2647 struct __result_of_impl<false, false, _Functor, _ArgTypes...>
2648 :
private __result_of_other_impl
2650 using type =
decltype(_S_test<_Functor, _ArgTypes...>(0));
2654 template<
typename _Functor,
typename... _ArgTypes>
2655 struct __invoke_result
2656 :
public __result_of_impl<
2657 is_member_object_pointer<
2658 typename remove_reference<_Functor>::type
2660 is_member_function_pointer<
2661 typename remove_reference<_Functor>::type
2663 _Functor, _ArgTypes...
2668 template<
typename _Functor,
typename... _ArgTypes>
2669 struct result_of<_Functor(_ArgTypes...)>
2670 :
public __invoke_result<_Functor, _ArgTypes...>
2671 { } _GLIBCXX17_DEPRECATED_SUGGEST(
"std::invoke_result");
2673#if __cplusplus >= 201402L
2674#pragma GCC diagnostic push
2675#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
2677 template<
size_t _Len,
size_t _Align =
2678 __alignof__(
typename __aligned_storage_msa<_Len>::__type)>
2681 template <
size_t _Len,
typename... _Types>
2682 using aligned_union_t _GLIBCXX23_DEPRECATED =
typename aligned_union<_Len, _Types...>::type;
2683#pragma GCC diagnostic pop
2686 template<
typename _Tp>
2690 template<
bool _Cond,
typename _Tp =
void>
2694 template<
bool _Cond,
typename _Iftrue,
typename _Iffalse>
2698 template<
typename... _Tp>
2702 template<
typename _Tp>
2706 template<
typename _Tp>
2710#ifdef __cpp_lib_void_t
2712 template<typename...> using void_t = void;
2722 template<
typename _Def,
template<
typename...>
class _Op,
typename... _Args>
2723 struct __detected_or
2730 template<
typename _Def,
template<
typename...>
class _Op,
typename... _Args>
2731 requires requires {
typename _Op<_Args...>; }
2732 struct __detected_or<_Def, _Op, _Args...>
2734 using type = _Op<_Args...>;
2739 template<
typename _Default,
typename _AlwaysVoid,
2740 template<
typename...>
class _Op,
typename... _Args>
2743 using type = _Default;
2748 template<
typename _Default,
template<
typename...>
class _Op,
2750 struct __detector<_Default, __void_t<_Op<_Args...>>, _Op, _Args...>
2752 using type = _Op<_Args...>;
2756 template<
typename _Default,
template<
typename...>
class _Op,
2758 using __detected_or = __detector<_Default, void, _Op, _Args...>;
2762 template<
typename _Default,
template<
typename...>
class _Op,
2764 using __detected_or_t
2765 =
typename __detected_or<_Default, _Op, _Args...>::type;
2771#define _GLIBCXX_HAS_NESTED_TYPE(_NTYPE) \
2772 template<typename _Tp, typename = __void_t<>> \
2773 struct __has_##_NTYPE \
2776 template<typename _Tp> \
2777 struct __has_##_NTYPE<_Tp, __void_t<typename _Tp::_NTYPE>> \
2781 template <
typename _Tp>
2782 struct __is_swappable;
2784 template <
typename _Tp>
2785 struct __is_nothrow_swappable;
2792 template<
typename _Tp>
2793 struct __is_tuple_like
2794 :
public __is_tuple_like_impl<__remove_cvref_t<_Tp>>::type
2798 template<
typename _Tp>
2799 _GLIBCXX20_CONSTEXPR
2801 _Require<__not_<__is_tuple_like<_Tp>>,
2802 is_move_constructible<_Tp>,
2803 is_move_assignable<_Tp>>
2805 noexcept(__and_<is_nothrow_move_constructible<_Tp>,
2806 is_nothrow_move_assignable<_Tp>>::value);
2808 template<
typename _Tp,
size_t _Nm>
2809 _GLIBCXX20_CONSTEXPR
2811 __enable_if_t<__is_swappable<_Tp>::value>
2812 swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
2813 noexcept(__is_nothrow_swappable<_Tp>::value);
2816 namespace __swappable_details {
2819 struct __do_is_swappable_impl
2821 template<
typename _Tp,
typename
2822 =
decltype(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))>
2823 static true_type __test(
int);
2829 struct __do_is_nothrow_swappable_impl
2831 template<
typename _Tp>
2832 static __bool_constant<
2833 noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))
2842 template<
typename _Tp>
2843 struct __is_swappable_impl
2844 :
public __swappable_details::__do_is_swappable_impl
2846 using type =
decltype(__test<_Tp>(0));
2849 template<
typename _Tp>
2850 struct __is_nothrow_swappable_impl
2851 :
public __swappable_details::__do_is_nothrow_swappable_impl
2853 using type =
decltype(__test<_Tp>(0));
2856 template<
typename _Tp>
2857 struct __is_swappable
2858 :
public __is_swappable_impl<_Tp>::type
2861 template<
typename _Tp>
2862 struct __is_nothrow_swappable
2863 :
public __is_nothrow_swappable_impl<_Tp>::type
2867#ifdef __cpp_lib_is_swappable
2871 template<
typename _Tp>
2873 :
public __is_swappable_impl<_Tp>::type
2875 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
2876 "template argument must be a complete class or an unbounded array");
2880 template<
typename _Tp>
2881 struct is_nothrow_swappable
2882 :
public __is_nothrow_swappable_impl<_Tp>::type
2884 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
2885 "template argument must be a complete class or an unbounded array");
2888#if __cplusplus >= 201402L
2890 template<
typename _Tp>
2891 _GLIBCXX17_INLINE
constexpr bool is_swappable_v =
2892 is_swappable<_Tp>::value;
2895 template<
typename _Tp>
2896 _GLIBCXX17_INLINE
constexpr bool is_nothrow_swappable_v =
2897 is_nothrow_swappable<_Tp>::value;
2901 namespace __swappable_with_details {
2904 struct __do_is_swappable_with_impl
2906 template<
typename _Tp,
typename _Up,
typename
2907 =
decltype(swap(std::declval<_Tp>(), std::declval<_Up>())),
2909 =
decltype(swap(std::declval<_Up>(), std::declval<_Tp>()))>
2912 template<
typename,
typename>
2916 struct __do_is_nothrow_swappable_with_impl
2918 template<
typename _Tp,
typename _Up>
2919 static __bool_constant<
2920 noexcept(swap(std::declval<_Tp>(), std::declval<_Up>()))
2922 noexcept(swap(std::declval<_Up>(), std::declval<_Tp>()))
2925 template<
typename,
typename>
2931 template<
typename _Tp,
typename _Up>
2932 struct __is_swappable_with_impl
2933 :
public __swappable_with_details::__do_is_swappable_with_impl
2935 using type =
decltype(__test<_Tp, _Up>(0));
2939 template<
typename _Tp>
2940 struct __is_swappable_with_impl<_Tp&, _Tp&>
2941 :
public __swappable_details::__do_is_swappable_impl
2943 using type =
decltype(__test<_Tp&>(0));
2946 template<
typename _Tp,
typename _Up>
2947 struct __is_nothrow_swappable_with_impl
2948 :
public __swappable_with_details::__do_is_nothrow_swappable_with_impl
2950 using type =
decltype(__test<_Tp, _Up>(0));
2954 template<
typename _Tp>
2955 struct __is_nothrow_swappable_with_impl<_Tp&, _Tp&>
2956 :
public __swappable_details::__do_is_nothrow_swappable_impl
2958 using type =
decltype(__test<_Tp&>(0));
2963 template<
typename _Tp,
typename _Up>
2964 struct is_swappable_with
2965 :
public __is_swappable_with_impl<_Tp, _Up>::type
2967 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
2968 "first template argument must be a complete class or an unbounded array");
2969 static_assert(std::__is_complete_or_unbounded(__type_identity<_Up>{}),
2970 "second template argument must be a complete class or an unbounded array");
2974 template<
typename _Tp,
typename _Up>
2975 struct is_nothrow_swappable_with
2976 :
public __is_nothrow_swappable_with_impl<_Tp, _Up>::type
2978 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
2979 "first template argument must be a complete class or an unbounded array");
2980 static_assert(std::__is_complete_or_unbounded(__type_identity<_Up>{}),
2981 "second template argument must be a complete class or an unbounded array");
2984#if __cplusplus >= 201402L
2986 template<
typename _Tp,
typename _Up>
2987 _GLIBCXX17_INLINE
constexpr bool is_swappable_with_v =
2988 is_swappable_with<_Tp, _Up>::value;
2991 template<
typename _Tp,
typename _Up>
2992 _GLIBCXX17_INLINE
constexpr bool is_nothrow_swappable_with_v =
2993 is_nothrow_swappable_with<_Tp, _Up>::value;
3003 template<
typename _Result,
typename _Ret,
3004 bool = is_void<_Ret>::value,
typename =
void>
3005 struct __is_invocable_impl
3012 template<
typename _Result,
typename _Ret>
3013 struct __is_invocable_impl<_Result, _Ret,
3015 __void_t<typename _Result::type>>
3021#pragma GCC diagnostic push
3022#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
3024 template<
typename _Result,
typename _Ret>
3025 struct __is_invocable_impl<_Result, _Ret,
3027 __void_t<typename _Result::type>>
3031 using _Res_t =
typename _Result::type;
3035 static _Res_t _S_get() noexcept;
3038 template<typename _Tp>
3039 static
void _S_conv(__type_identity_t<_Tp>) noexcept;
3042 template<typename _Tp,
3043 bool _Nothrow = noexcept(_S_conv<_Tp>(_S_get())),
3044 typename = decltype(_S_conv<_Tp>(_S_get())),
3045#if __has_builtin(__reference_converts_from_temporary)
3046 bool _Dangle = __reference_converts_from_temporary(_Tp, _Res_t)
3048 bool _Dangle =
false
3051 static __bool_constant<_Nothrow && !_Dangle>
3054 template<
typename _Tp,
bool = false>
3060 using type =
decltype(_S_test<_Ret,
true>(1));
3063 using __nothrow_conv =
decltype(_S_test<_Ret>(1));
3065#pragma GCC diagnostic pop
3067 template<
typename _Fn,
typename... _ArgTypes>
3068 struct __is_invocable
3069 : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
3072 template<
typename _Fn,
typename _Tp,
typename... _Args>
3073 constexpr bool __call_is_nt(__invoke_memfun_ref)
3075 using _Up =
typename __inv_unwrap<_Tp>::type;
3076 return noexcept((std::declval<_Up>().*std::declval<_Fn>())(
3077 std::declval<_Args>()...));
3080 template<
typename _Fn,
typename _Tp,
typename... _Args>
3081 constexpr bool __call_is_nt(__invoke_memfun_deref)
3083 return noexcept(((*std::declval<_Tp>()).*std::declval<_Fn>())(
3084 std::declval<_Args>()...));
3087 template<
typename _Fn,
typename _Tp>
3088 constexpr bool __call_is_nt(__invoke_memobj_ref)
3090 using _Up =
typename __inv_unwrap<_Tp>::type;
3091 return noexcept(std::declval<_Up>().*std::declval<_Fn>());
3094 template<
typename _Fn,
typename _Tp>
3095 constexpr bool __call_is_nt(__invoke_memobj_deref)
3097 return noexcept((*std::declval<_Tp>()).*std::declval<_Fn>());
3100 template<
typename _Fn,
typename... _Args>
3101 constexpr bool __call_is_nt(__invoke_other)
3103 return noexcept(std::declval<_Fn>()(std::declval<_Args>()...));
3106 template<
typename _Result,
typename _Fn,
typename... _Args>
3107 struct __call_is_nothrow
3109 std::__call_is_nt<_Fn, _Args...>(typename _Result::__invoke_type{})
3113 template<
typename _Fn,
typename... _Args>
3114 using __call_is_nothrow_
3115 = __call_is_nothrow<__invoke_result<_Fn, _Args...>, _Fn, _Args...>;
3118 template<
typename _Fn,
typename... _Args>
3119 struct __is_nothrow_invocable
3120 : __and_<__is_invocable<_Fn, _Args...>,
3121 __call_is_nothrow_<_Fn, _Args...>>::type
3124#pragma GCC diagnostic push
3125#pragma GCC diagnostic ignored "-Wctor-dtor-privacy"
3126 struct __nonesuchbase {};
3127 struct __nonesuch :
private __nonesuchbase {
3128 ~__nonesuch() =
delete;
3129 __nonesuch(__nonesuch
const&) =
delete;
3130 void operator=(__nonesuch
const&) =
delete;
3132#pragma GCC diagnostic pop
3135#ifdef __cpp_lib_is_invocable
3137 template<typename _Functor, typename... _ArgTypes>
3138 struct invoke_result
3139 :
public __invoke_result<_Functor, _ArgTypes...>
3141 static_assert(std::__is_complete_or_unbounded(__type_identity<_Functor>{}),
3142 "_Functor must be a complete class or an unbounded array");
3143 static_assert((std::__is_complete_or_unbounded(
3144 __type_identity<_ArgTypes>{}) && ...),
3145 "each argument type must be a complete class or an unbounded array");
3149 template<
typename _Fn,
typename... _Args>
3150 using invoke_result_t =
typename invoke_result<_Fn, _Args...>::type;
3153 template<
typename _Fn,
typename... _ArgTypes>
3155 : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>::type
3157 static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
3158 "_Fn must be a complete class or an unbounded array");
3159 static_assert((std::__is_complete_or_unbounded(
3160 __type_identity<_ArgTypes>{}) && ...),
3161 "each argument type must be a complete class or an unbounded array");
3165 template<
typename _Ret,
typename _Fn,
typename... _ArgTypes>
3166 struct is_invocable_r
3167 : __is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>::type
3169 static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
3170 "_Fn must be a complete class or an unbounded array");
3171 static_assert((std::__is_complete_or_unbounded(
3172 __type_identity<_ArgTypes>{}) && ...),
3173 "each argument type must be a complete class or an unbounded array");
3174 static_assert(std::__is_complete_or_unbounded(__type_identity<_Ret>{}),
3175 "_Ret must be a complete class or an unbounded array");
3179 template<
typename _Fn,
typename... _ArgTypes>
3180 struct is_nothrow_invocable
3181 : __and_<__is_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, void>,
3182 __call_is_nothrow_<_Fn, _ArgTypes...>>::type
3184 static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
3185 "_Fn must be a complete class or an unbounded array");
3186 static_assert((std::__is_complete_or_unbounded(
3187 __type_identity<_ArgTypes>{}) && ...),
3188 "each argument type must be a complete class or an unbounded array");
3195 template<
typename _Result,
typename _Ret>
3196 using __is_nt_invocable_impl
3197 =
typename __is_invocable_impl<_Result, _Ret>::__nothrow_conv;
3201 template<
typename _Ret,
typename _Fn,
typename... _ArgTypes>
3202 struct is_nothrow_invocable_r
3203 : __and_<__is_nt_invocable_impl<__invoke_result<_Fn, _ArgTypes...>, _Ret>,
3204 __call_is_nothrow_<_Fn, _ArgTypes...>>::type
3206 static_assert(std::__is_complete_or_unbounded(__type_identity<_Fn>{}),
3207 "_Fn must be a complete class or an unbounded array");
3208 static_assert((std::__is_complete_or_unbounded(
3209 __type_identity<_ArgTypes>{}) && ...),
3210 "each argument type must be a complete class or an unbounded array");
3211 static_assert(std::__is_complete_or_unbounded(__type_identity<_Ret>{}),
3212 "_Ret must be a complete class or an unbounded array");
3216#if __cpp_lib_type_trait_variable_templates
3231template <
typename _Tp>
3232 inline constexpr bool is_void_v = is_void<_Tp>::value;
3233template <
typename _Tp>
3234 inline constexpr bool is_null_pointer_v = is_null_pointer<_Tp>::value;
3235template <
typename _Tp>
3236 inline constexpr bool is_integral_v = is_integral<_Tp>::value;
3237template <
typename _Tp>
3238 inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value;
3240#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_array)
3241template <
typename _Tp>
3242 inline constexpr bool is_array_v = __is_array(_Tp);
3244template <
typename _Tp>
3245 inline constexpr bool is_array_v =
false;
3246template <
typename _Tp>
3247 inline constexpr bool is_array_v<_Tp[]> =
true;
3248template <
typename _Tp,
size_t _Num>
3249 inline constexpr bool is_array_v<_Tp[_Num]> =
true;
3252template <
typename _Tp>
3253 inline constexpr bool is_pointer_v = is_pointer<_Tp>::value;
3254template <
typename _Tp>
3255 inline constexpr bool is_lvalue_reference_v =
false;
3256template <
typename _Tp>
3257 inline constexpr bool is_lvalue_reference_v<_Tp&> =
true;
3258template <
typename _Tp>
3259 inline constexpr bool is_rvalue_reference_v =
false;
3260template <
typename _Tp>
3261 inline constexpr bool is_rvalue_reference_v<_Tp&&> =
true;
3263#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_object_pointer)
3264template <
typename _Tp>
3265 inline constexpr bool is_member_object_pointer_v =
3266 __is_member_object_pointer(_Tp);
3268template <
typename _Tp>
3269 inline constexpr bool is_member_object_pointer_v =
3270 is_member_object_pointer<_Tp>::value;
3273#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_function_pointer)
3274template <
typename _Tp>
3275 inline constexpr bool is_member_function_pointer_v =
3276 __is_member_function_pointer(_Tp);
3278template <
typename _Tp>
3279 inline constexpr bool is_member_function_pointer_v =
3280 is_member_function_pointer<_Tp>::value;
3283template <
typename _Tp>
3284 inline constexpr bool is_enum_v = __is_enum(_Tp);
3285template <
typename _Tp>
3286 inline constexpr bool is_union_v = __is_union(_Tp);
3287template <
typename _Tp>
3288 inline constexpr bool is_class_v = __is_class(_Tp);
3291#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_reference)
3292template <
typename _Tp>
3293 inline constexpr bool is_reference_v = __is_reference(_Tp);
3295template <
typename _Tp>
3296 inline constexpr bool is_reference_v =
false;
3297template <
typename _Tp>
3298 inline constexpr bool is_reference_v<_Tp&> =
true;
3299template <
typename _Tp>
3300 inline constexpr bool is_reference_v<_Tp&&> =
true;
3303template <
typename _Tp>
3304 inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value;
3305template <
typename _Tp>
3306 inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value;
3308#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_object)
3309template <
typename _Tp>
3310 inline constexpr bool is_object_v = __is_object(_Tp);
3312template <
typename _Tp>
3313 inline constexpr bool is_object_v = is_object<_Tp>::value;
3316template <
typename _Tp>
3317 inline constexpr bool is_scalar_v = is_scalar<_Tp>::value;
3318template <
typename _Tp>
3319 inline constexpr bool is_compound_v = !is_fundamental_v<_Tp>;
3321#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_pointer)
3322template <
typename _Tp>
3323 inline constexpr bool is_member_pointer_v = __is_member_pointer(_Tp);
3325template <
typename _Tp>
3326 inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value;
3329template <
typename _Tp>
3330 inline constexpr bool is_const_v =
false;
3331template <
typename _Tp>
3332 inline constexpr bool is_const_v<const _Tp> =
true;
3334#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_function)
3335template <
typename _Tp>
3336 inline constexpr bool is_function_v = __is_function(_Tp);
3338template <
typename _Tp>
3339 inline constexpr bool is_function_v = !is_const_v<const _Tp>;
3340template <
typename _Tp>
3341 inline constexpr bool is_function_v<_Tp&> =
false;
3342template <
typename _Tp>
3343 inline constexpr bool is_function_v<_Tp&&> =
false;
3346template <
typename _Tp>
3347 inline constexpr bool is_volatile_v =
false;
3348template <
typename _Tp>
3349 inline constexpr bool is_volatile_v<volatile _Tp> =
true;
3351template <
typename _Tp>
3352 inline constexpr bool is_trivial_v = __is_trivial(_Tp);
3353template <
typename _Tp>
3354 inline constexpr bool is_trivially_copyable_v = __is_trivially_copyable(_Tp);
3355template <
typename _Tp>
3356 inline constexpr bool is_standard_layout_v = __is_standard_layout(_Tp);
3357template <
typename _Tp>
3358 _GLIBCXX20_DEPRECATED_SUGGEST(
"is_standard_layout_v && is_trivial_v")
3359 inline constexpr
bool is_pod_v = __is_pod(_Tp);
3360template <typename _Tp>
3361 _GLIBCXX17_DEPRECATED
3362 inline constexpr
bool is_literal_type_v = __is_literal_type(_Tp);
3363template <typename _Tp>
3364 inline constexpr
bool is_empty_v = __is_empty(_Tp);
3365template <typename _Tp>
3366 inline constexpr
bool is_polymorphic_v = __is_polymorphic(_Tp);
3367template <typename _Tp>
3368 inline constexpr
bool is_abstract_v = __is_abstract(_Tp);
3369template <typename _Tp>
3370 inline constexpr
bool is_final_v = __is_final(_Tp);
3372template <typename _Tp>
3373 inline constexpr
bool is_signed_v = is_signed<_Tp>::value;
3374template <typename _Tp>
3375 inline constexpr
bool is_unsigned_v = is_unsigned<_Tp>::value;
3377template <typename _Tp, typename... _Args>
3378 inline constexpr
bool is_constructible_v = __is_constructible(_Tp, _Args...);
3379template <typename _Tp>
3380 inline constexpr
bool is_default_constructible_v = __is_constructible(_Tp);
3381template <typename _Tp>
3382 inline constexpr
bool is_copy_constructible_v
3383 = __is_constructible(_Tp, __add_lval_ref_t<const _Tp>);
3384template <typename _Tp>
3385 inline constexpr
bool is_move_constructible_v
3386 = __is_constructible(_Tp, __add_rval_ref_t<_Tp>);
3388template <typename _Tp, typename _Up>
3389 inline constexpr
bool is_assignable_v = __is_assignable(_Tp, _Up);
3390template <typename _Tp>
3391 inline constexpr
bool is_copy_assignable_v
3392 = __is_assignable(__add_lval_ref_t<_Tp>, __add_lval_ref_t<const _Tp>);
3393template <typename _Tp>
3394 inline constexpr
bool is_move_assignable_v
3395 = __is_assignable(__add_lval_ref_t<_Tp>, __add_rval_ref_t<_Tp>);
3397template <typename _Tp>
3398 inline constexpr
bool is_destructible_v = is_destructible<_Tp>::value;
3400template <typename _Tp, typename... _Args>
3401 inline constexpr
bool is_trivially_constructible_v
3402 = __is_trivially_constructible(_Tp, _Args...);
3403template <typename _Tp>
3404 inline constexpr
bool is_trivially_default_constructible_v
3405 = __is_trivially_constructible(_Tp);
3406template <typename _Tp>
3407 inline constexpr
bool is_trivially_copy_constructible_v
3408 = __is_trivially_constructible(_Tp, __add_lval_ref_t<const _Tp>);
3409template <typename _Tp>
3410 inline constexpr
bool is_trivially_move_constructible_v
3411 = __is_trivially_constructible(_Tp, __add_rval_ref_t<_Tp>);
3413template <typename _Tp, typename _Up>
3414 inline constexpr
bool is_trivially_assignable_v
3415 = __is_trivially_assignable(_Tp, _Up);
3416template <typename _Tp>
3417 inline constexpr
bool is_trivially_copy_assignable_v
3418 = __is_trivially_assignable(__add_lval_ref_t<_Tp>,
3419 __add_lval_ref_t<const _Tp>);
3420template <typename _Tp>
3421 inline constexpr
bool is_trivially_move_assignable_v
3422 = __is_trivially_assignable(__add_lval_ref_t<_Tp>,
3423 __add_rval_ref_t<_Tp>);
3426template <
typename _Tp>
3427 inline constexpr bool is_trivially_destructible_v =
false;
3429template <
typename _Tp>
3430 requires (!is_reference_v<_Tp>) &&
requires (_Tp& __t) { __t.~_Tp(); }
3431 inline constexpr bool is_trivially_destructible_v<_Tp>
3432 = __has_trivial_destructor(_Tp);
3433template <
typename _Tp>
3434 inline constexpr bool is_trivially_destructible_v<_Tp&> =
true;
3435template <
typename _Tp>
3436 inline constexpr bool is_trivially_destructible_v<_Tp&&> =
true;
3437template <
typename _Tp,
size_t _Nm>
3438 inline constexpr bool is_trivially_destructible_v<_Tp[_Nm]>
3439 = is_trivially_destructible_v<_Tp>;
3441template <
typename _Tp>
3442 inline constexpr bool is_trivially_destructible_v =
3443 is_trivially_destructible<_Tp>::value;
3446template <
typename _Tp,
typename... _Args>
3447 inline constexpr bool is_nothrow_constructible_v
3448 = __is_nothrow_constructible(_Tp, _Args...);
3449template <
typename _Tp>
3450 inline constexpr bool is_nothrow_default_constructible_v
3451 = __is_nothrow_constructible(_Tp);
3452template <
typename _Tp>
3453 inline constexpr bool is_nothrow_copy_constructible_v
3454 = __is_nothrow_constructible(_Tp, __add_lval_ref_t<const _Tp>);
3455template <
typename _Tp>
3456 inline constexpr bool is_nothrow_move_constructible_v
3457 = __is_nothrow_constructible(_Tp, __add_rval_ref_t<_Tp>);
3459template <
typename _Tp,
typename _Up>
3460 inline constexpr bool is_nothrow_assignable_v
3461 = __is_nothrow_assignable(_Tp, _Up);
3462template <
typename _Tp>
3463 inline constexpr bool is_nothrow_copy_assignable_v
3464 = __is_nothrow_assignable(__add_lval_ref_t<_Tp>,
3465 __add_lval_ref_t<const _Tp>);
3466template <
typename _Tp>
3467 inline constexpr bool is_nothrow_move_assignable_v
3468 = __is_nothrow_assignable(__add_lval_ref_t<_Tp>, __add_rval_ref_t<_Tp>);
3470template <
typename _Tp>
3471 inline constexpr bool is_nothrow_destructible_v =
3472 is_nothrow_destructible<_Tp>::value;
3474template <
typename _Tp>
3475 inline constexpr bool has_virtual_destructor_v
3476 = __has_virtual_destructor(_Tp);
3478template <
typename _Tp>
3479 inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value;
3481template <
typename _Tp>
3482 inline constexpr size_t rank_v = 0;
3483template <
typename _Tp,
size_t _Size>
3484 inline constexpr size_t rank_v<_Tp[_Size]> = 1 + rank_v<_Tp>;
3485template <
typename _Tp>
3486 inline constexpr size_t rank_v<_Tp[]> = 1 + rank_v<_Tp>;
3488template <
typename _Tp,
unsigned _Idx = 0>
3489 inline constexpr size_t extent_v = 0;
3490template <
typename _Tp,
size_t _Size>
3491 inline constexpr size_t extent_v<_Tp[_Size], 0> = _Size;
3492template <
typename _Tp,
unsigned _Idx,
size_t _Size>
3493 inline constexpr size_t extent_v<_Tp[_Size], _Idx> = extent_v<_Tp, _Idx - 1>;
3494template <
typename _Tp>
3495 inline constexpr size_t extent_v<_Tp[], 0> = 0;
3496template <
typename _Tp,
unsigned _Idx>
3497 inline constexpr size_t extent_v<_Tp[], _Idx> = extent_v<_Tp, _Idx - 1>;
3499#ifdef _GLIBCXX_HAVE_BUILTIN_IS_SAME
3500template <
typename _Tp,
typename _Up>
3501 inline constexpr bool is_same_v = __is_same(_Tp, _Up);
3503template <
typename _Tp,
typename _Up>
3504 inline constexpr bool is_same_v =
false;
3505template <
typename _Tp>
3506 inline constexpr bool is_same_v<_Tp, _Tp> =
true;
3508template <
typename _Base,
typename _Derived>
3509 inline constexpr bool is_base_of_v = __is_base_of(_Base, _Derived);
3510#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_convertible)
3511template <
typename _From,
typename _To>
3512 inline constexpr bool is_convertible_v = __is_convertible(_From, _To);
3514template <
typename _From,
typename _To>
3515 inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value;
3517template<
typename _Fn,
typename... _Args>
3518 inline constexpr bool is_invocable_v = is_invocable<_Fn, _Args...>::value;
3519template<
typename _Fn,
typename... _Args>
3520 inline constexpr bool is_nothrow_invocable_v
3521 = is_nothrow_invocable<_Fn, _Args...>::value;
3522template<
typename _Ret,
typename _Fn,
typename... _Args>
3523 inline constexpr bool is_invocable_r_v
3524 = is_invocable_r<_Ret, _Fn, _Args...>::value;
3525template<
typename _Ret,
typename _Fn,
typename... _Args>
3526 inline constexpr bool is_nothrow_invocable_r_v
3527 = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value;
3531#ifdef __cpp_lib_has_unique_object_representations
3534 template<typename _Tp>
3535 struct has_unique_object_representations
3536 : bool_constant<__has_unique_object_representations(
3537 remove_cv_t<remove_all_extents_t<_Tp>>
3540 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{}),
3541 "template argument must be a complete class or an unbounded array");
3544# if __cpp_lib_type_trait_variable_templates
3546 template<typename _Tp>
3547 inline constexpr bool has_unique_object_representations_v
3548 = has_unique_object_representations<_Tp>::value;
3552#ifdef __cpp_lib_is_aggregate
3555 template<typename _Tp>
3557 : bool_constant<__is_aggregate(remove_cv_t<_Tp>)>
3560# if __cpp_lib_type_trait_variable_templates
3565 template<
typename _Tp>
3566 inline constexpr bool is_aggregate_v = __is_aggregate(remove_cv_t<_Tp>);
3574#ifdef __cpp_lib_remove_cvref
3575# if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_cvref)
3576 template<
typename _Tp>
3578 {
using type = __remove_cvref(_Tp); };
3580 template<
typename _Tp>
3582 {
using type =
typename remove_cv<_Tp>::type; };
3584 template<
typename _Tp>
3585 struct remove_cvref<_Tp&>
3586 {
using type =
typename remove_cv<_Tp>::type; };
3588 template<
typename _Tp>
3589 struct remove_cvref<_Tp&&>
3590 {
using type =
typename remove_cv<_Tp>::type; };
3593 template<
typename _Tp>
3594 using remove_cvref_t =
typename remove_cvref<_Tp>::type;
3598#ifdef __cpp_lib_type_identity
3603 template<
typename _Tp>
3604 struct type_identity {
using type = _Tp; };
3606 template<
typename _Tp>
3607 using type_identity_t =
typename type_identity<_Tp>::type;
3611#ifdef __cpp_lib_unwrap_ref
3616 template<
typename _Tp>
3617 struct unwrap_reference {
using type = _Tp; };
3619 template<
typename _Tp>
3620 struct unwrap_reference<reference_wrapper<_Tp>> {
using type = _Tp&; };
3622 template<
typename _Tp>
3623 using unwrap_reference_t =
typename unwrap_reference<_Tp>::type;
3630 template<
typename _Tp>
3631 struct unwrap_ref_decay {
using type = unwrap_reference_t<decay_t<_Tp>>; };
3633 template<
typename _Tp>
3634 using unwrap_ref_decay_t =
typename unwrap_ref_decay<_Tp>::type;
3638#ifdef __cpp_lib_bounded_array_traits
3642# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_bounded_array)
3643 template<
typename _Tp>
3644 inline constexpr bool is_bounded_array_v = __is_bounded_array(_Tp);
3646 template<
typename _Tp>
3647 inline constexpr bool is_bounded_array_v =
false;
3649 template<
typename _Tp,
size_t _Size>
3650 inline constexpr bool is_bounded_array_v<_Tp[_Size]> =
true;
3656 template<
typename _Tp>
3657 inline constexpr bool is_unbounded_array_v =
false;
3659 template<
typename _Tp>
3660 inline constexpr bool is_unbounded_array_v<_Tp[]> =
true;
3664 template<
typename _Tp>
3665 struct is_bounded_array
3666 :
public bool_constant<is_bounded_array_v<_Tp>>
3671 template<
typename _Tp>
3672 struct is_unbounded_array
3673 :
public bool_constant<is_unbounded_array_v<_Tp>>
3677#if __has_builtin(__is_layout_compatible) && __cplusplus >= 202002L
3680 template<
typename _Tp,
typename _Up>
3682 : bool_constant<__is_layout_compatible(_Tp, _Up)>
3687 template<
typename _Tp,
typename _Up>
3689 = __is_layout_compatible(_Tp, _Up);
3691#if __has_builtin(__builtin_is_corresponding_member)
3692# ifndef __cpp_lib_is_layout_compatible
3693# error "libstdc++ bug: is_corresponding_member and is_layout_compatible are provided but their FTM is not set"
3697 template<
typename _S1,
typename _S2,
typename _M1,
typename _M2>
3700 {
return __builtin_is_corresponding_member(__m1, __m2); }
3704#if __has_builtin(__is_pointer_interconvertible_base_of) \
3705 && __cplusplus >= 202002L
3708 template<
typename _Base,
typename _Derived>
3710 : bool_constant<__is_pointer_interconvertible_base_of(_Base, _Derived)>
3715 template<
typename _Base,
typename _Derived>
3717 = __is_pointer_interconvertible_base_of(_Base, _Derived);
3719#if __has_builtin(__builtin_is_pointer_interconvertible_with_class)
3720# ifndef __cpp_lib_is_pointer_interconvertible
3721# error "libstdc++ bug: is_pointer_interconvertible available but FTM is not set"
3727 template<
typename _Tp,
typename _Mem>
3730 {
return __builtin_is_pointer_interconvertible_with_class(__mp); }
3734#ifdef __cpp_lib_is_scoped_enum
3738# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum)
3739 template<
typename _Tp>
3740 struct is_scoped_enum
3741 : bool_constant<__is_scoped_enum(_Tp)>
3744 template<
typename _Tp>
3745 struct is_scoped_enum
3749 template<
typename _Tp>
3750 requires __is_enum(_Tp)
3751 &&
requires(remove_cv_t<_Tp> __t) { __t = __t; }
3752 struct is_scoped_enum<_Tp>
3753 : bool_constant<!requires(_Tp __t, void(*__f)(int)) { __f(__t); }>
3759# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum)
3760 template<
typename _Tp>
3761 inline constexpr bool is_scoped_enum_v = __is_scoped_enum(_Tp);
3763 template<
typename _Tp>
3764 inline constexpr bool is_scoped_enum_v = is_scoped_enum<_Tp>::value;
3768#ifdef __cpp_lib_reference_from_temporary
3773 template<typename _Tp, typename _Up>
3774 struct reference_constructs_from_temporary
3775 :
public bool_constant<__reference_constructs_from_temporary(_Tp, _Up)>
3777 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{})
3778 && std::__is_complete_or_unbounded(__type_identity<_Up>{}),
3779 "template argument must be a complete class or an unbounded array");
3786 template<
typename _Tp,
typename _Up>
3787 struct reference_converts_from_temporary
3788 :
public bool_constant<__reference_converts_from_temporary(_Tp, _Up)>
3790 static_assert(std::__is_complete_or_unbounded(__type_identity<_Tp>{})
3791 && std::__is_complete_or_unbounded(__type_identity<_Up>{}),
3792 "template argument must be a complete class or an unbounded array");
3797 template<
typename _Tp,
typename _Up>
3798 inline constexpr bool reference_constructs_from_temporary_v
3799 = reference_constructs_from_temporary<_Tp, _Up>::value;
3803 template<
typename _Tp,
typename _Up>
3804 inline constexpr bool reference_converts_from_temporary_v
3805 = reference_converts_from_temporary<_Tp, _Up>::value;
3808#ifdef __cpp_lib_is_constant_evaluated
3811 constexpr inline bool
3812 is_constant_evaluated() noexcept
3814#if __cpp_if_consteval >= 202106L
3815 if consteval {
return true; }
else {
return false; }
3817 return __builtin_is_constant_evaluated();
3822#if __cplusplus >= 202002L
3824 template<
typename _From,
typename _To>
3825 using __copy_cv =
typename __match_cv_qualifiers<_From, _To>::__type;
3827 template<
typename _Xp,
typename _Yp>
3829 =
decltype(
false ? declval<_Xp(&)()>()() :
declval<_Yp(&)()>()());
3831 template<
typename _Ap,
typename _Bp,
typename =
void>
3832 struct __common_ref_impl
3836 template<
typename _Ap,
typename _Bp>
3837 using __common_ref =
typename __common_ref_impl<_Ap, _Bp>::type;
3840 template<
typename _Xp,
typename _Yp>
3841 using __condres_cvref
3842 = __cond_res<__copy_cv<_Xp, _Yp>&, __copy_cv<_Yp, _Xp>&>;
3845 template<
typename _Xp,
typename _Yp>
3846 struct __common_ref_impl<_Xp&, _Yp&, __void_t<__condres_cvref<_Xp, _Yp>>>
3847 : enable_if<is_reference_v<__condres_cvref<_Xp, _Yp>>,
3848 __condres_cvref<_Xp, _Yp>>
3852 template<
typename _Xp,
typename _Yp>
3853 using __common_ref_C = remove_reference_t<__common_ref<_Xp&, _Yp&>>&&;
3856 template<
typename _Xp,
typename _Yp>
3857 struct __common_ref_impl<_Xp&&, _Yp&&,
3858 _Require<is_convertible<_Xp&&, __common_ref_C<_Xp, _Yp>>,
3859 is_convertible<_Yp&&, __common_ref_C<_Xp, _Yp>>>>
3860 {
using type = __common_ref_C<_Xp, _Yp>; };
3863 template<
typename _Xp,
typename _Yp>
3864 using __common_ref_D = __common_ref<const _Xp&, _Yp&>;
3867 template<
typename _Xp,
typename _Yp>
3868 struct __common_ref_impl<_Xp&&, _Yp&,
3869 _Require<is_convertible<_Xp&&, __common_ref_D<_Xp, _Yp>>>>
3870 {
using type = __common_ref_D<_Xp, _Yp>; };
3873 template<
typename _Xp,
typename _Yp>
3874 struct __common_ref_impl<_Xp&, _Yp&&>
3875 : __common_ref_impl<_Yp&&, _Xp&>
3879 template<
typename _Tp,
typename _Up,
3880 template<
typename>
class _TQual,
template<
typename>
class _UQual>
3881 struct basic_common_reference
3885 template<
typename _Tp>
3887 {
template<
typename _Up>
using __type = __copy_cv<_Tp, _Up>; };
3889 template<
typename _Tp>
3891 {
template<
typename _Up>
using __type = __copy_cv<_Tp, _Up>&; };
3893 template<
typename _Tp>
3894 struct __xref<_Tp&&>
3895 {
template<
typename _Up>
using __type = __copy_cv<_Tp, _Up>&&; };
3897 template<
typename _Tp1,
typename _Tp2>
3898 using __basic_common_ref
3899 =
typename basic_common_reference<remove_cvref_t<_Tp1>,
3900 remove_cvref_t<_Tp2>,
3901 __xref<_Tp1>::template __type,
3902 __xref<_Tp2>::template __type>::type;
3905 template<
typename... _Tp>
3906 struct common_reference;
3908 template<
typename... _Tp>
3913 struct common_reference<>
3917 template<
typename _Tp0>
3918 struct common_reference<_Tp0>
3919 {
using type = _Tp0; };
3922 template<
typename _Tp1,
typename _Tp2,
int _Bullet = 1,
typename =
void>
3923 struct __common_reference_impl
3924 : __common_reference_impl<_Tp1, _Tp2, _Bullet + 1>
3928 template<
typename _Tp1,
typename _Tp2>
3929 struct common_reference<_Tp1, _Tp2>
3930 : __common_reference_impl<_Tp1, _Tp2>
3934 template<
typename _Tp1,
typename _Tp2>
3935 struct __common_reference_impl<_Tp1&, _Tp2&, 1,
3936 void_t<__common_ref<_Tp1&, _Tp2&>>>
3937 {
using type = __common_ref<_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&>; };
3955 template<
typename _Tp1,
typename _Tp2>
3956 struct __common_reference_impl<_Tp1, _Tp2, 2,
3957 void_t<__basic_common_ref<_Tp1, _Tp2>>>
3958 {
using type = __basic_common_ref<_Tp1, _Tp2>; };
3961 template<
typename _Tp1,
typename _Tp2>
3962 struct __common_reference_impl<_Tp1, _Tp2, 3,
3963 void_t<__cond_res<_Tp1, _Tp2>>>
3964 {
using type = __cond_res<_Tp1, _Tp2>; };
3967 template<
typename _Tp1,
typename _Tp2>
3968 struct __common_reference_impl<_Tp1, _Tp2, 4,
3970 {
using type = common_type_t<_Tp1, _Tp2>; };
3973 template<
typename _Tp1,
typename _Tp2>
3974 struct __common_reference_impl<_Tp1, _Tp2, 5, void>
3978 template<
typename _Tp1,
typename _Tp2,
typename... _Rest>
3979 struct common_reference<_Tp1, _Tp2, _Rest...>
3980 : __common_type_fold<common_reference<_Tp1, _Tp2>,
3981 __common_type_pack<_Rest...>>
3985 template<
typename _Tp1,
typename _Tp2,
typename... _Rest>
3986 struct __common_type_fold<common_reference<_Tp1, _Tp2>,
3987 __common_type_pack<_Rest...>,
3989 :
public common_reference<common_reference_t<_Tp1, _Tp2>, _Rest...>
3997_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