60 #ifndef _STL_ITERATOR_H
61 #define _STL_ITERATOR_H 1
68 #if __cplusplus >= 201103L
72 #if __cplusplus > 201703L
73 # define __cpp_lib_array_constexpr 201811L
74 # define __cpp_lib_constexpr_iterator 201811L
75 #elif __cplusplus == 201703L
76 # define __cpp_lib_array_constexpr 201803L
79 #if __cplusplus > 201703L
85 namespace std _GLIBCXX_VISIBILITY(default)
87 _GLIBCXX_BEGIN_NAMESPACE_VERSION
94 #if __cplusplus > 201703L && __cpp_lib_concepts
99 template<
typename _Cat,
typename _Limit,
typename _Otherwise = _Cat>
100 using __clamp_iter_cat
101 = conditional_t<derived_from<_Cat, _Limit>, _Limit, _Otherwise>;
124 template<
typename _Iterator>
126 :
public iterator<typename iterator_traits<_Iterator>::iterator_category,
127 typename iterator_traits<_Iterator>::value_type,
128 typename iterator_traits<_Iterator>::difference_type,
129 typename iterator_traits<_Iterator>::pointer,
130 typename iterator_traits<_Iterator>::reference>
138 typedef _Iterator iterator_type;
139 typedef typename __traits_type::difference_type difference_type;
140 typedef typename __traits_type::pointer pointer;
141 typedef typename __traits_type::reference reference;
143 #if __cplusplus > 201703L && __cpp_lib_concepts
144 using iterator_concept
149 = __detail::__clamp_iter_cat<
typename __traits_type::iterator_category,
166 explicit _GLIBCXX17_CONSTEXPR
174 : current(__x.current) { }
176 #if __cplusplus >= 201103L
184 template<
typename _Iter>
187 : current(__x.
base()) { }
192 _GLIBCXX17_CONSTEXPR iterator_type
206 _GLIBCXX17_CONSTEXPR reference
209 _Iterator __tmp = current;
218 _GLIBCXX17_CONSTEXPR pointer
220 #if __cplusplus > 201703L && __cpp_concepts >= 201907L
221 requires is_pointer_v<_Iterator>
222 || requires(
const _Iterator __i) { __i.operator->(); }
227 _Iterator __tmp = current;
229 return _S_to_pointer(__tmp);
331 _GLIBCXX17_CONSTEXPR reference
333 {
return *(*
this + __n); }
335 #if __cplusplus > 201703L && __cpp_lib_concepts
336 friend constexpr iter_rvalue_reference_t<_Iterator>
338 noexcept(is_nothrow_copy_constructible_v<_Iterator>
339 && noexcept(ranges::iter_move(--std::declval<_Iterator&>())))
341 auto __tmp = __i.base();
342 return ranges::iter_move(--__tmp);
345 template<indirectly_swappable<_Iterator> _Iter2>
346 friend constexpr
void
348 const reverse_iterator<_Iter2>& __y)
349 noexcept(is_nothrow_copy_constructible_v<_Iterator>
350 && is_nothrow_copy_constructible_v<_Iter2>
351 && noexcept(ranges::iter_swap(--std::declval<_Iterator&>(),
352 --std::declval<_Iter2&>())))
354 auto __xtmp = __x.base();
355 auto __ytmp = __y.base();
356 ranges::iter_swap(--__xtmp, --__ytmp);
361 template<
typename _Tp>
362 static _GLIBCXX17_CONSTEXPR _Tp*
363 _S_to_pointer(_Tp* __p)
366 template<
typename _Tp>
367 static _GLIBCXX17_CONSTEXPR pointer
368 _S_to_pointer(_Tp __t)
369 {
return __t.operator->(); }
382 #if __cplusplus <= 201703L || ! defined __cpp_lib_concepts
383 template<
typename _Iterator>
384 inline _GLIBCXX17_CONSTEXPR
bool
387 {
return __x.
base() == __y.
base(); }
389 template<
typename _Iterator>
390 inline _GLIBCXX17_CONSTEXPR
bool
391 operator<(
const reverse_iterator<_Iterator>& __x,
392 const reverse_iterator<_Iterator>& __y)
393 {
return __y.base() < __x.base(); }
395 template<
typename _Iterator>
396 inline _GLIBCXX17_CONSTEXPR
bool
397 operator!=(
const reverse_iterator<_Iterator>& __x,
398 const reverse_iterator<_Iterator>& __y)
399 {
return !(__x == __y); }
401 template<
typename _Iterator>
402 inline _GLIBCXX17_CONSTEXPR
bool
403 operator>(
const reverse_iterator<_Iterator>& __x,
404 const reverse_iterator<_Iterator>& __y)
405 {
return __y < __x; }
407 template<
typename _Iterator>
408 inline _GLIBCXX17_CONSTEXPR
bool
409 operator<=(
const reverse_iterator<_Iterator>& __x,
410 const reverse_iterator<_Iterator>& __y)
411 {
return !(__y < __x); }
413 template<
typename _Iterator>
414 inline _GLIBCXX17_CONSTEXPR
bool
415 operator>=(
const reverse_iterator<_Iterator>& __x,
416 const reverse_iterator<_Iterator>& __y)
417 {
return !(__x < __y); }
421 template<
typename _IteratorL,
typename _IteratorR>
422 inline _GLIBCXX17_CONSTEXPR
bool
423 operator==(
const reverse_iterator<_IteratorL>& __x,
424 const reverse_iterator<_IteratorR>& __y)
425 {
return __x.base() == __y.base(); }
427 template<
typename _IteratorL,
typename _IteratorR>
428 inline _GLIBCXX17_CONSTEXPR
bool
429 operator<(
const reverse_iterator<_IteratorL>& __x,
430 const reverse_iterator<_IteratorR>& __y)
431 {
return __y.base() < __x.base(); }
433 template<
typename _IteratorL,
typename _IteratorR>
434 inline _GLIBCXX17_CONSTEXPR
bool
435 operator!=(
const reverse_iterator<_IteratorL>& __x,
436 const reverse_iterator<_IteratorR>& __y)
437 {
return !(__x == __y); }
439 template<
typename _IteratorL,
typename _IteratorR>
440 inline _GLIBCXX17_CONSTEXPR
bool
441 operator>(
const reverse_iterator<_IteratorL>& __x,
442 const reverse_iterator<_IteratorR>& __y)
443 {
return __y < __x; }
445 template<
typename _IteratorL,
typename _IteratorR>
446 inline _GLIBCXX17_CONSTEXPR
bool
447 operator<=(
const reverse_iterator<_IteratorL>& __x,
448 const reverse_iterator<_IteratorR>& __y)
449 {
return !(__y < __x); }
451 template<
typename _IteratorL,
typename _IteratorR>
452 inline _GLIBCXX17_CONSTEXPR
bool
453 operator>=(
const reverse_iterator<_IteratorL>& __x,
454 const reverse_iterator<_IteratorR>& __y)
455 {
return !(__x < __y); }
457 template<
typename _IteratorL,
typename _IteratorR>
459 operator==(
const reverse_iterator<_IteratorL>& __x,
460 const reverse_iterator<_IteratorR>& __y)
461 requires requires { { __x.base() == __y.base() } -> convertible_to<bool>; }
462 {
return __x.base() == __y.base(); }
464 template<
typename _IteratorL,
typename _IteratorR>
466 operator!=(
const reverse_iterator<_IteratorL>& __x,
467 const reverse_iterator<_IteratorR>& __y)
468 requires requires { { __x.base() != __y.base() } -> convertible_to<bool>; }
469 {
return __x.base() != __y.base(); }
471 template<
typename _IteratorL,
typename _IteratorR>
473 operator<(
const reverse_iterator<_IteratorL>& __x,
474 const reverse_iterator<_IteratorR>& __y)
475 requires requires { { __x.base() > __y.base() } -> convertible_to<bool>; }
476 {
return __x.base() > __y.base(); }
478 template<
typename _IteratorL,
typename _IteratorR>
480 operator>(
const reverse_iterator<_IteratorL>& __x,
481 const reverse_iterator<_IteratorR>& __y)
482 requires requires { { __x.base() < __y.base() } -> convertible_to<bool>; }
483 {
return __x.base() < __y.base(); }
485 template<
typename _IteratorL,
typename _IteratorR>
487 operator<=(
const reverse_iterator<_IteratorL>& __x,
488 const reverse_iterator<_IteratorR>& __y)
489 requires requires { { __x.base() >= __y.base() } -> convertible_to<bool>; }
490 {
return __x.base() >= __y.base(); }
492 template<
typename _IteratorL,
typename _IteratorR>
494 operator>=(
const reverse_iterator<_IteratorL>& __x,
495 const reverse_iterator<_IteratorR>& __y)
496 requires requires { { __x.base() <= __y.base() } -> convertible_to<bool>; }
497 {
return __x.base() <= __y.base(); }
499 template<
typename _IteratorL,
500 three_way_comparable_with<_IteratorL> _IteratorR>
501 constexpr compare_three_way_result_t<_IteratorL, _IteratorR>
502 operator<=>(
const reverse_iterator<_IteratorL>& __x,
503 const reverse_iterator<_IteratorR>& __y)
504 {
return __y.base() <=> __x.base(); }
508 #if __cplusplus < 201103L
509 template<
typename _Iterator>
510 inline typename reverse_iterator<_Iterator>::difference_type
511 operator-(
const reverse_iterator<_Iterator>& __x,
512 const reverse_iterator<_Iterator>& __y)
513 {
return __y.base() - __x.base(); }
515 template<
typename _IteratorL,
typename _IteratorR>
516 inline typename reverse_iterator<_IteratorL>::difference_type
517 operator-(
const reverse_iterator<_IteratorL>& __x,
518 const reverse_iterator<_IteratorR>& __y)
519 {
return __y.base() - __x.base(); }
523 template<
typename _IteratorL,
typename _IteratorR>
524 inline _GLIBCXX17_CONSTEXPR
auto
525 operator-(
const reverse_iterator<_IteratorL>& __x,
526 const reverse_iterator<_IteratorR>& __y)
527 -> decltype(__y.base() - __x.base())
528 {
return __y.base() - __x.base(); }
531 template<
typename _Iterator>
532 inline _GLIBCXX17_CONSTEXPR reverse_iterator<_Iterator>
533 operator+(
typename reverse_iterator<_Iterator>::difference_type __n,
534 const reverse_iterator<_Iterator>& __x)
535 {
return reverse_iterator<_Iterator>(__x.base() - __n); }
537 #if __cplusplus >= 201103L
539 template<
typename _Iterator>
540 inline _GLIBCXX17_CONSTEXPR reverse_iterator<_Iterator>
541 __make_reverse_iterator(_Iterator __i)
542 {
return reverse_iterator<_Iterator>(__i); }
544 # if __cplusplus >= 201402L
545 # define __cpp_lib_make_reverse_iterator 201402
550 template<
typename _Iterator>
551 inline _GLIBCXX17_CONSTEXPR reverse_iterator<_Iterator>
555 # if __cplusplus > 201703L && defined __cpp_lib_concepts
556 template<
typename _Iterator1,
typename _Iterator2>
557 requires (!sized_sentinel_for<_Iterator1, _Iterator2>)
558 inline constexpr
bool
559 disable_sized_sentinel_for<reverse_iterator<_Iterator1>,
560 reverse_iterator<_Iterator2>> =
true;
564 template<
typename _Iterator>
567 __niter_base(reverse_iterator<_Iterator> __it)
568 -> decltype(__make_reverse_iterator(__niter_base(__it.base())))
569 {
return __make_reverse_iterator(__niter_base(__it.base())); }
571 template<
typename _Iterator>
572 struct __is_move_iterator<reverse_iterator<_Iterator> >
573 : __is_move_iterator<_Iterator>
576 template<
typename _Iterator>
579 __miter_base(reverse_iterator<_Iterator> __it)
580 -> decltype(__make_reverse_iterator(__miter_base(__it.base())))
581 {
return __make_reverse_iterator(__miter_base(__it.base())); }
595 template<
typename _Container>
597 :
public iterator<output_iterator_tag, void, void, void, void>
600 _Container* container;
605 #if __cplusplus > 201703L
612 explicit _GLIBCXX20_CONSTEXPR
627 #if __cplusplus < 201103L
629 operator=(
typename _Container::const_reference __value)
631 container->push_back(__value);
637 operator=(
const typename _Container::value_type& __value)
639 container->push_back(__value);
645 operator=(
typename _Container::value_type&& __value)
647 container->push_back(
std::move(__value));
682 template<
typename _Container>
684 inline back_insert_iterator<_Container>
698 template<
typename _Container>
700 :
public iterator<output_iterator_tag, void, void, void, void>
703 _Container* container;
708 #if __cplusplus > 201703L
715 explicit _GLIBCXX20_CONSTEXPR
730 #if __cplusplus < 201103L
732 operator=(
typename _Container::const_reference __value)
734 container->push_front(__value);
740 operator=(
const typename _Container::value_type& __value)
742 container->push_front(__value);
748 operator=(
typename _Container::value_type&& __value)
750 container->push_front(
std::move(__value));
785 template<
typename _Container>
787 inline front_insert_iterator<_Container>
805 template<
typename _Container>
807 :
public iterator<output_iterator_tag, void, void, void, void>
809 #if __cplusplus > 201703L && defined __cpp_lib_concepts
810 using _Iter = std::__detail::__range_iter_t<_Container>;
813 _Container* container =
nullptr;
814 _Iter iter = _Iter();
816 typedef typename _Container::iterator _Iter;
819 _Container* container;
827 #if __cplusplus > 201703L && defined __cpp_lib_concepts
864 #if __cplusplus < 201103L
866 operator=(
typename _Container::const_reference __value)
868 iter = container->insert(iter, __value);
875 operator=(
const typename _Container::value_type& __value)
877 iter = container->insert(iter, __value);
884 operator=(
typename _Container::value_type&& __value)
886 iter = container->insert(iter,
std::move(__value));
923 #if __cplusplus > 201703L && defined __cpp_lib_concepts
924 template<
typename _Container>
925 constexpr insert_iterator<_Container>
926 inserter(_Container& __x, std::__detail::__range_iter_t<_Container> __i)
927 {
return insert_iterator<_Container>(__x, __i); }
929 template<
typename _Container>
930 inline insert_iterator<_Container>
931 inserter(_Container& __x,
typename _Container::iterator __i)
937 _GLIBCXX_END_NAMESPACE_VERSION
940 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
942 _GLIBCXX_BEGIN_NAMESPACE_VERSION
951 template<
typename _Iterator,
typename _Container>
952 class __normal_iterator
955 _Iterator _M_current;
960 typedef _Iterator iterator_type;
961 typedef typename __traits_type::iterator_category iterator_category;
962 typedef typename __traits_type::value_type value_type;
963 typedef typename __traits_type::difference_type difference_type;
964 typedef typename __traits_type::reference reference;
965 typedef typename __traits_type::pointer pointer;
967 #if __cplusplus > 201703L && __cpp_lib_concepts
968 using iterator_concept = std::__detail::__iter_concept<_Iterator>;
971 _GLIBCXX_CONSTEXPR __normal_iterator() _GLIBCXX_NOEXCEPT
972 : _M_current(_Iterator()) { }
974 explicit _GLIBCXX20_CONSTEXPR
975 __normal_iterator(
const _Iterator& __i) _GLIBCXX_NOEXCEPT
976 : _M_current(__i) { }
979 template<
typename _Iter>
981 __normal_iterator(
const __normal_iterator<_Iter,
982 typename __enable_if<
983 (std::__are_same<_Iter, typename _Container::pointer>::__value),
984 _Container>::__type>& __i) _GLIBCXX_NOEXCEPT
985 : _M_current(__i.base()) { }
991 {
return *_M_current; }
995 operator->() const _GLIBCXX_NOEXCEPT
996 {
return _M_current; }
1000 operator++() _GLIBCXX_NOEXCEPT
1006 _GLIBCXX20_CONSTEXPR
1008 operator++(
int) _GLIBCXX_NOEXCEPT
1009 {
return __normal_iterator(_M_current++); }
1012 _GLIBCXX20_CONSTEXPR
1014 operator--() _GLIBCXX_NOEXCEPT
1020 _GLIBCXX20_CONSTEXPR
1022 operator--(
int) _GLIBCXX_NOEXCEPT
1023 {
return __normal_iterator(_M_current--); }
1026 _GLIBCXX20_CONSTEXPR
1028 operator[](difference_type __n)
const _GLIBCXX_NOEXCEPT
1029 {
return _M_current[__n]; }
1031 _GLIBCXX20_CONSTEXPR
1033 operator+=(difference_type __n) _GLIBCXX_NOEXCEPT
1034 { _M_current += __n;
return *
this; }
1036 _GLIBCXX20_CONSTEXPR
1038 operator+(difference_type __n)
const _GLIBCXX_NOEXCEPT
1039 {
return __normal_iterator(_M_current + __n); }
1041 _GLIBCXX20_CONSTEXPR
1043 operator-=(difference_type __n) _GLIBCXX_NOEXCEPT
1044 { _M_current -= __n;
return *
this; }
1046 _GLIBCXX20_CONSTEXPR
1048 operator-(difference_type __n)
const _GLIBCXX_NOEXCEPT
1049 {
return __normal_iterator(_M_current - __n); }
1051 _GLIBCXX20_CONSTEXPR
1053 base() const _GLIBCXX_NOEXCEPT
1054 {
return _M_current; }
1065 #if __cpp_lib_three_way_comparison
1066 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1067 requires requires (_IteratorL __lhs, _IteratorR __rhs)
1068 { { __lhs == __rhs } -> std::convertible_to<bool>; }
1070 operator==(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1071 const __normal_iterator<_IteratorR, _Container>& __rhs)
1072 noexcept(noexcept(__lhs.base() == __rhs.base()))
1073 {
return __lhs.base() == __rhs.base(); }
1075 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1076 constexpr std::__detail::__synth3way_t<_IteratorR, _IteratorL>
1077 operator<=>(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1078 const __normal_iterator<_IteratorR, _Container>& __rhs)
1079 noexcept(noexcept(std::__detail::__synth3way(__lhs.base(), __rhs.base())))
1080 {
return std::__detail::__synth3way(__lhs.base(), __rhs.base()); }
1083 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1084 _GLIBCXX20_CONSTEXPR
1086 operator==(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1087 const __normal_iterator<_IteratorR, _Container>& __rhs)
1089 {
return __lhs.base() == __rhs.base(); }
1091 template<
typename _Iterator,
typename _Container>
1092 _GLIBCXX20_CONSTEXPR
1094 operator==(
const __normal_iterator<_Iterator, _Container>& __lhs,
1095 const __normal_iterator<_Iterator, _Container>& __rhs)
1097 {
return __lhs.base() == __rhs.base(); }
1099 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1100 _GLIBCXX20_CONSTEXPR
1102 operator!=(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1103 const __normal_iterator<_IteratorR, _Container>& __rhs)
1105 {
return __lhs.base() != __rhs.base(); }
1107 template<
typename _Iterator,
typename _Container>
1108 _GLIBCXX20_CONSTEXPR
1110 operator!=(
const __normal_iterator<_Iterator, _Container>& __lhs,
1111 const __normal_iterator<_Iterator, _Container>& __rhs)
1113 {
return __lhs.base() != __rhs.base(); }
1116 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1118 operator<(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1119 const __normal_iterator<_IteratorR, _Container>& __rhs)
1121 {
return __lhs.base() < __rhs.base(); }
1123 template<
typename _Iterator,
typename _Container>
1124 _GLIBCXX20_CONSTEXPR
1126 operator<(
const __normal_iterator<_Iterator, _Container>& __lhs,
1127 const __normal_iterator<_Iterator, _Container>& __rhs)
1129 {
return __lhs.base() < __rhs.base(); }
1131 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1133 operator>(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1134 const __normal_iterator<_IteratorR, _Container>& __rhs)
1136 {
return __lhs.base() > __rhs.base(); }
1138 template<
typename _Iterator,
typename _Container>
1139 _GLIBCXX20_CONSTEXPR
1141 operator>(
const __normal_iterator<_Iterator, _Container>& __lhs,
1142 const __normal_iterator<_Iterator, _Container>& __rhs)
1144 {
return __lhs.base() > __rhs.base(); }
1146 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1148 operator<=(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1149 const __normal_iterator<_IteratorR, _Container>& __rhs)
1151 {
return __lhs.base() <= __rhs.base(); }
1153 template<
typename _Iterator,
typename _Container>
1154 _GLIBCXX20_CONSTEXPR
1156 operator<=(
const __normal_iterator<_Iterator, _Container>& __lhs,
1157 const __normal_iterator<_Iterator, _Container>& __rhs)
1159 {
return __lhs.base() <= __rhs.base(); }
1161 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1163 operator>=(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1164 const __normal_iterator<_IteratorR, _Container>& __rhs)
1166 {
return __lhs.base() >= __rhs.base(); }
1168 template<
typename _Iterator,
typename _Container>
1169 _GLIBCXX20_CONSTEXPR
1171 operator>=(
const __normal_iterator<_Iterator, _Container>& __lhs,
1172 const __normal_iterator<_Iterator, _Container>& __rhs)
1174 {
return __lhs.base() >= __rhs.base(); }
1181 template<
typename _IteratorL,
typename _IteratorR,
typename _Container>
1182 #if __cplusplus >= 201103L
1184 _GLIBCXX20_CONSTEXPR
1186 operator-(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1187 const __normal_iterator<_IteratorR, _Container>& __rhs) noexcept
1188 -> decltype(__lhs.base() - __rhs.base())
1190 inline typename __normal_iterator<_IteratorL, _Container>::difference_type
1191 operator-(
const __normal_iterator<_IteratorL, _Container>& __lhs,
1192 const __normal_iterator<_IteratorR, _Container>& __rhs)
1194 {
return __lhs.base() - __rhs.base(); }
1196 template<
typename _Iterator,
typename _Container>
1197 _GLIBCXX20_CONSTEXPR
1198 inline typename __normal_iterator<_Iterator, _Container>::difference_type
1199 operator-(
const __normal_iterator<_Iterator, _Container>& __lhs,
1200 const __normal_iterator<_Iterator, _Container>& __rhs)
1202 {
return __lhs.base() - __rhs.base(); }
1204 template<
typename _Iterator,
typename _Container>
1205 _GLIBCXX20_CONSTEXPR
1206 inline __normal_iterator<_Iterator, _Container>
1207 operator+(
typename __normal_iterator<_Iterator, _Container>::difference_type
1208 __n,
const __normal_iterator<_Iterator, _Container>& __i)
1210 {
return __normal_iterator<_Iterator, _Container>(__i.base() + __n); }
1212 _GLIBCXX_END_NAMESPACE_VERSION
1215 namespace std _GLIBCXX_VISIBILITY(default)
1217 _GLIBCXX_BEGIN_NAMESPACE_VERSION
1219 template<
typename _Iterator,
typename _Container>
1220 _GLIBCXX20_CONSTEXPR
1222 __niter_base(__gnu_cxx::__normal_iterator<_Iterator, _Container> __it)
1224 {
return __it.base(); }
1226 #if __cplusplus >= 201103L
1232 #if __cplusplus > 201703L && __cpp_lib_concepts
1233 template<semiregular _Sent>
1239 noexcept(is_nothrow_default_constructible_v<_Sent>)
1243 move_sentinel(_Sent __s)
1244 noexcept(is_nothrow_move_constructible_v<_Sent>)
1247 template<
typename _S2> requires convertible_to<const _S2&, _Sent>
1249 move_sentinel(
const move_sentinel<_S2>& __s)
1250 noexcept(is_nothrow_constructible_v<_Sent, const _S2&>)
1251 : _M_last(__s.base())
1254 template<
typename _S2> requires assignable_from<_Sent&, const _S2&>
1255 constexpr move_sentinel&
1256 operator=(
const move_sentinel<_S2>& __s)
1257 noexcept(is_nothrow_assignable_v<_Sent, const _S2&>)
1259 _M_last = __s.base();
1265 noexcept(is_nothrow_copy_constructible_v<_Sent>)
1275 #if __cplusplus > 201703L && __cpp_lib_concepts
1276 template<
typename _Iterator>
1277 struct __move_iter_cat
1280 template<
typename _Iterator>
1281 requires requires {
typename iterator_traits<_Iterator>::iterator_category; }
1282 struct __move_iter_cat<_Iterator>
1284 using iterator_category
1285 = __clamp_iter_cat<typename iterator_traits<_Iterator>::iterator_category,
1286 random_access_iterator_tag>;
1300 template<
typename _Iterator>
1302 #if __cplusplus > 201703L && __cpp_lib_concepts
1303 :
public __detail::__move_iter_cat<_Iterator>
1306 _Iterator _M_current;
1309 #if ! (__cplusplus > 201703L && __cpp_lib_concepts)
1310 using __base_ref =
typename __traits_type::reference;
1314 using iterator_type = _Iterator;
1316 #if __cplusplus > 201703L && __cpp_lib_concepts
1319 using value_type = iter_value_t<_Iterator>;
1320 using difference_type = iter_difference_t<_Iterator>;
1321 using pointer = _Iterator;
1322 using reference = iter_rvalue_reference_t<_Iterator>;
1324 typedef typename __traits_type::iterator_category iterator_category;
1325 typedef typename __traits_type::value_type value_type;
1326 typedef typename __traits_type::difference_type difference_type;
1328 typedef _Iterator pointer;
1332 typename remove_reference<__base_ref>::type&&,
1333 __base_ref>::type reference;
1336 _GLIBCXX17_CONSTEXPR
1340 explicit _GLIBCXX17_CONSTEXPR
1344 template<
typename _Iter>
1345 _GLIBCXX17_CONSTEXPR
1347 : _M_current(__i.base()) { }
1349 template<
typename _Iter>
1350 _GLIBCXX17_CONSTEXPR
1353 _M_current = __i.base();
1357 #if __cplusplus <= 201703L
1358 _GLIBCXX17_CONSTEXPR iterator_type
1360 {
return _M_current; }
1362 constexpr iterator_type
1364 #if __cpp_lib_concepts
1365 requires copy_constructible<iterator_type>
1367 {
return _M_current; }
1369 constexpr iterator_type
1374 _GLIBCXX17_CONSTEXPR reference
1376 #if __cplusplus > 201703L && __cpp_lib_concepts
1377 {
return ranges::iter_move(_M_current); }
1379 {
return static_cast<reference
>(*_M_current); }
1382 _GLIBCXX17_CONSTEXPR pointer
1384 {
return _M_current; }
1401 #if __cpp_lib_concepts
1403 operator++(
int) requires (!forward_iterator<_Iterator>)
1427 operator+=(difference_type __n)
1438 operator-=(difference_type __n)
1444 _GLIBCXX17_CONSTEXPR reference
1445 operator[](difference_type __n)
const
1446 #if __cplusplus > 201703L && __cpp_lib_concepts
1447 {
return ranges::iter_move(_M_current + __n); }
1452 #if __cplusplus > 201703L && __cpp_lib_concepts
1453 template<sentinel_for<_Iterator> _Sent>
1454 friend constexpr
bool
1455 operator==(
const move_iterator& __x,
const move_sentinel<_Sent>& __y)
1456 {
return __x.base() == __y.base(); }
1458 template<sized_sentinel_for<_Iterator> _Sent>
1459 friend constexpr iter_difference_t<_Iterator>
1461 {
return __x.base() - __y.base(); }
1463 template<sized_sentinel_for<_Iterator> _Sent>
1464 friend constexpr iter_difference_t<_Iterator>
1466 {
return __x.base() - __y.base(); }
1468 friend constexpr iter_rvalue_reference_t<_Iterator>
1470 noexcept(noexcept(ranges::iter_move(__i._M_current)))
1471 {
return ranges::iter_move(__i._M_current); }
1473 template<indirectly_swappable<_Iterator> _Iter2>
1474 friend constexpr
void
1476 noexcept(noexcept(ranges::iter_swap(__x._M_current, __y._M_current)))
1477 {
return ranges::iter_swap(__x._M_current, __y._M_current); }
1481 template<
typename _IteratorL,
typename _IteratorR>
1482 inline _GLIBCXX17_CONSTEXPR
bool
1485 #if __cplusplus > 201703L && __cpp_lib_concepts
1486 requires requires { { __x.base() == __y.base() } -> convertible_to<bool>; }
1488 {
return __x.base() == __y.base(); }
1490 #if __cpp_lib_three_way_comparison
1491 template<
typename _IteratorL,
1492 three_way_comparable_with<_IteratorL> _IteratorR>
1493 constexpr compare_three_way_result_t<_IteratorL, _IteratorR>
1494 operator<=>(
const move_iterator<_IteratorL>& __x,
1495 const move_iterator<_IteratorR>& __y)
1496 {
return __x.base() <=> __y.base(); }
1498 template<
typename _IteratorL,
typename _IteratorR>
1499 inline _GLIBCXX17_CONSTEXPR
bool
1500 operator!=(
const move_iterator<_IteratorL>& __x,
1501 const move_iterator<_IteratorR>& __y)
1502 {
return !(__x == __y); }
1505 template<
typename _IteratorL,
typename _IteratorR>
1506 inline _GLIBCXX17_CONSTEXPR
bool
1507 operator<(
const move_iterator<_IteratorL>& __x,
1508 const move_iterator<_IteratorR>& __y)
1509 #if __cplusplus > 201703L && __cpp_lib_concepts
1510 requires requires { { __x.base() < __y.base() } -> convertible_to<bool>; }
1512 {
return __x.base() < __y.base(); }
1514 template<
typename _IteratorL,
typename _IteratorR>
1515 inline _GLIBCXX17_CONSTEXPR
bool
1516 operator<=(
const move_iterator<_IteratorL>& __x,
1517 const move_iterator<_IteratorR>& __y)
1518 #if __cplusplus > 201703L && __cpp_lib_concepts
1519 requires requires { { __y.base() < __x.base() } -> convertible_to<bool>; }
1521 {
return !(__y < __x); }
1523 template<
typename _IteratorL,
typename _IteratorR>
1524 inline _GLIBCXX17_CONSTEXPR
bool
1525 operator>(
const move_iterator<_IteratorL>& __x,
1526 const move_iterator<_IteratorR>& __y)
1527 #if __cplusplus > 201703L && __cpp_lib_concepts
1528 requires requires { { __y.base() < __x.base() } -> convertible_to<bool>; }
1530 {
return __y < __x; }
1532 template<
typename _IteratorL,
typename _IteratorR>
1533 inline _GLIBCXX17_CONSTEXPR
bool
1534 operator>=(
const move_iterator<_IteratorL>& __x,
1535 const move_iterator<_IteratorR>& __y)
1536 #if __cplusplus > 201703L && __cpp_lib_concepts
1537 requires requires { { __x.base() < __y.base() } -> convertible_to<bool>; }
1539 {
return !(__x < __y); }
1541 #if ! (__cplusplus > 201703L && __cpp_lib_concepts)
1549 template<
typename _Iterator>
1550 inline _GLIBCXX17_CONSTEXPR
bool
1551 operator==(
const move_iterator<_Iterator>& __x,
1552 const move_iterator<_Iterator>& __y)
1553 {
return __x.base() == __y.base(); }
1555 template<
typename _Iterator>
1556 inline _GLIBCXX17_CONSTEXPR
bool
1557 operator!=(
const move_iterator<_Iterator>& __x,
1558 const move_iterator<_Iterator>& __y)
1559 {
return !(__x == __y); }
1561 template<
typename _Iterator>
1562 inline _GLIBCXX17_CONSTEXPR
bool
1563 operator<(
const move_iterator<_Iterator>& __x,
1564 const move_iterator<_Iterator>& __y)
1565 {
return __x.base() < __y.base(); }
1567 template<
typename _Iterator>
1568 inline _GLIBCXX17_CONSTEXPR
bool
1569 operator<=(
const move_iterator<_Iterator>& __x,
1570 const move_iterator<_Iterator>& __y)
1571 {
return !(__y < __x); }
1573 template<
typename _Iterator>
1574 inline _GLIBCXX17_CONSTEXPR
bool
1575 operator>(
const move_iterator<_Iterator>& __x,
1576 const move_iterator<_Iterator>& __y)
1577 {
return __y < __x; }
1579 template<
typename _Iterator>
1580 inline _GLIBCXX17_CONSTEXPR
bool
1581 operator>=(
const move_iterator<_Iterator>& __x,
1582 const move_iterator<_Iterator>& __y)
1583 {
return !(__x < __y); }
1587 template<
typename _IteratorL,
typename _IteratorR>
1588 inline _GLIBCXX17_CONSTEXPR
auto
1589 operator-(
const move_iterator<_IteratorL>& __x,
1590 const move_iterator<_IteratorR>& __y)
1591 -> decltype(__x.base() - __y.base())
1592 {
return __x.base() - __y.base(); }
1594 template<
typename _Iterator>
1595 inline _GLIBCXX17_CONSTEXPR move_iterator<_Iterator>
1596 operator+(
typename move_iterator<_Iterator>::difference_type __n,
1597 const move_iterator<_Iterator>& __x)
1598 {
return __x + __n; }
1600 template<
typename _Iterator>
1601 inline _GLIBCXX17_CONSTEXPR move_iterator<_Iterator>
1602 make_move_iterator(_Iterator __i)
1603 {
return move_iterator<_Iterator>(
std::move(__i)); }
1605 template<
typename _Iterator,
typename _ReturnType
1606 =
typename conditional<__move_if_noexcept_cond
1607 <
typename iterator_traits<_Iterator>::value_type>::value,
1608 _Iterator, move_iterator<_Iterator>>::type>
1609 inline _GLIBCXX17_CONSTEXPR _ReturnType
1610 __make_move_if_noexcept_iterator(_Iterator __i)
1611 {
return _ReturnType(__i); }
1615 template<
typename _Tp,
typename _ReturnType
1616 =
typename conditional<__move_if_noexcept_cond<_Tp>::value,
1617 const _Tp*, move_iterator<_Tp*>>::type>
1618 inline _GLIBCXX17_CONSTEXPR _ReturnType
1619 __make_move_if_noexcept_iterator(_Tp* __i)
1620 {
return _ReturnType(__i); }
1622 #if __cplusplus > 201703L && __cpp_lib_concepts
1627 template<
typename _It>
1628 concept __common_iter_has_arrow = indirectly_readable<const _It>
1629 && (requires(
const _It& __it) { __it.operator->(); }
1630 || is_reference_v<iter_reference_t<_It>>
1631 || constructible_from<iter_value_t<_It>, iter_reference_t<_It>>);
1633 template<
typename _It>
1634 concept __common_iter_use_postfix_proxy
1635 = (!requires (_It& __i) { { *__i++ } -> __can_reference; })
1636 && constructible_from<iter_value_t<_It>, iter_reference_t<_It>>;
1640 template<input_or_output_iterator _It, sentinel_for<_It> _Sent>
1641 requires (!same_as<_It, _Sent>) && copyable<_It>
1642 class common_iterator
1644 template<
typename _Tp,
typename _Up>
1645 static constexpr
bool
1648 if constexpr (is_trivially_default_constructible_v<_Tp>)
1649 return is_nothrow_assignable_v<_Tp, _Up>;
1651 return is_nothrow_constructible_v<_Tp, _Up>;
1654 template<
typename _It2,
typename _Sent2>
1655 static constexpr
bool
1657 {
return _S_noexcept1<_It, _It2>() && _S_noexcept1<_Sent, _Sent2>(); }
1661 iter_value_t<_It> _M_keep;
1663 __arrow_proxy(iter_reference_t<_It>&& __x)
1666 friend class common_iterator;
1669 const iter_value_t<_It>*
1674 class __postfix_proxy
1676 iter_value_t<_It> _M_keep;
1678 __postfix_proxy(iter_reference_t<_It>&& __x)
1681 friend class common_iterator;
1684 const iter_value_t<_It>&
1692 noexcept(is_nothrow_default_constructible_v<_It>)
1693 : _M_it(), _M_index(0)
1697 common_iterator(_It __i)
1698 noexcept(is_nothrow_move_constructible_v<_It>)
1699 : _M_it(
std::
move(__i)), _M_index(0)
1703 common_iterator(_Sent __s)
1704 noexcept(is_nothrow_move_constructible_v<_Sent>)
1705 : _M_sent(
std::
move(__s)), _M_index(1)
1708 template<
typename _It2,
typename _Sent2>
1709 requires convertible_to<const _It2&, _It>
1710 && convertible_to<const _Sent2&, _Sent>
1712 common_iterator(
const common_iterator<_It2, _Sent2>& __x)
1713 noexcept(_S_noexcept<const _It2&, const _Sent2&>())
1714 : _M_valueless(), _M_index(__x._M_index)
1718 if constexpr (is_trivially_default_constructible_v<_It>)
1723 else if (_M_index == 1)
1725 if constexpr (is_trivially_default_constructible_v<_Sent>)
1733 common_iterator(
const common_iterator& __x)
1734 noexcept(_S_noexcept<const _It&, const _Sent&>())
1735 : _M_valueless(), _M_index(__x._M_index)
1739 if constexpr (is_trivially_default_constructible_v<_It>)
1744 else if (_M_index == 1)
1746 if constexpr (is_trivially_default_constructible_v<_Sent>)
1754 operator=(
const common_iterator& __x)
1755 noexcept(is_nothrow_copy_assignable_v<_It>
1756 && is_nothrow_copy_assignable_v<_Sent>
1757 && is_nothrow_copy_constructible_v<_It>
1758 && is_nothrow_copy_constructible_v<_Sent>)
1760 return this->
operator=<_It, _Sent>(__x);
1763 template<
typename _It2,
typename _Sent2>
1764 requires convertible_to<const _It2&, _It>
1765 && convertible_to<const _Sent2&, _Sent>
1766 && assignable_from<_It&, const _It2&>
1767 && assignable_from<_Sent&, const _Sent2&>
1769 operator=(
const common_iterator<_It2, _Sent2>& __x)
1770 noexcept(is_nothrow_constructible_v<_It, const _It2&>
1771 && is_nothrow_constructible_v<_Sent, const _Sent2&>
1772 && is_nothrow_assignable_v<_It, const _It2&>
1773 && is_nothrow_assignable_v<_Sent, const _Sent2&>)
1775 switch(_M_index << 2 | __x._M_index)
1781 _M_sent = __x._M_sent;
1800 __glibcxx_assert(__x._M_has_value());
1801 __builtin_unreachable();
1822 __glibcxx_assert(_M_index == 0);
1827 operator*() const requires __detail::__dereferenceable<const _It>
1829 __glibcxx_assert(_M_index == 0);
1834 operator->() const requires __detail::__common_iter_has_arrow<_It>
1836 __glibcxx_assert(_M_index == 0);
1837 if constexpr (is_pointer_v<_It> || requires { _M_it.operator->(); })
1839 else if constexpr (is_reference_v<iter_reference_t<_It>>)
1841 auto&& __tmp = *_M_it;
1845 return __arrow_proxy{*_M_it};
1851 __glibcxx_assert(_M_index == 0);
1859 __glibcxx_assert(_M_index == 0);
1860 if constexpr (forward_iterator<_It>)
1862 common_iterator __tmp = *
this;
1866 else if constexpr (!__detail::__common_iter_use_postfix_proxy<_It>)
1870 __postfix_proxy __p(**
this);
1876 template<
typename _It2, sentinel_for<_It> _Sent2>
1877 requires sentinel_for<_Sent, _It2>
1879 operator==(
const common_iterator& __x,
1880 const common_iterator<_It2, _Sent2>& __y)
1882 switch(__x._M_index << 2 | __y._M_index)
1888 return __x._M_it == __y._M_sent;
1890 return __x._M_sent == __y._M_it;
1892 __glibcxx_assert(__x._M_has_value());
1893 __glibcxx_assert(__y._M_has_value());
1894 __builtin_unreachable();
1898 template<
typename _It2, sentinel_for<_It> _Sent2>
1899 requires sentinel_for<_Sent, _It2> && equality_comparable_with<_It, _It2>
1901 operator==(
const common_iterator& __x,
1902 const common_iterator<_It2, _Sent2>& __y)
1904 switch(__x._M_index << 2 | __y._M_index)
1909 return __x._M_it == __y._M_it;
1911 return __x._M_it == __y._M_sent;
1913 return __x._M_sent == __y._M_it;
1915 __glibcxx_assert(__x._M_has_value());
1916 __glibcxx_assert(__y._M_has_value());
1917 __builtin_unreachable();
1921 template<sized_sentinel_for<_It> _It2, sized_sentinel_for<_It> _Sent2>
1922 requires sized_sentinel_for<_Sent, _It2>
1923 friend iter_difference_t<_It2>
1925 const common_iterator<_It2, _Sent2>& __y)
1927 switch(__x._M_index << 2 | __y._M_index)
1932 return __x._M_it - __y._M_it;
1934 return __x._M_it - __y._M_sent;
1936 return __x._M_sent - __y._M_it;
1938 __glibcxx_assert(__x._M_has_value());
1939 __glibcxx_assert(__y._M_has_value());
1940 __builtin_unreachable();
1944 friend iter_rvalue_reference_t<_It>
1945 iter_move(
const common_iterator& __i)
1946 noexcept(noexcept(ranges::iter_move(std::declval<const _It&>())))
1947 requires input_iterator<_It>
1949 __glibcxx_assert(__i._M_index == 0);
1950 return ranges::iter_move(__i._M_it);
1953 template<indirectly_swappable<_It> _It2,
typename _Sent2>
1955 iter_swap(
const common_iterator& __x,
1956 const common_iterator<_It2, _Sent2>& __y)
1957 noexcept(noexcept(ranges::iter_swap(std::declval<const _It&>(),
1958 std::declval<const _It2&>())))
1960 __glibcxx_assert(__x._M_index == 0);
1961 __glibcxx_assert(__y._M_index == 0);
1962 return ranges::iter_swap(__x._M_it, __y._M_it);
1966 template<input_or_output_iterator _It2, sentinel_for<_It2> _Sent2>
1967 friend class common_iterator;
1969 bool _M_has_value() const noexcept {
return _M_index < 2; }
1975 unsigned char _M_valueless;
1977 unsigned char _M_index;
1980 template<
typename _It,
typename _Sent>
1981 struct incrementable_traits<common_iterator<_It, _Sent>>
1983 using difference_type = iter_difference_t<_It>;
1986 template<input_iterator _It,
typename _Sent>
1987 struct iterator_traits<common_iterator<_It, _Sent>>
1990 template<
typename _Iter>
1996 template<
typename _Iter>
1997 requires __detail::__common_iter_has_arrow<_Iter>
2000 using _CIter = common_iterator<_Iter, _Sent>;
2001 using type = decltype(std::declval<const _CIter&>().operator->());
2007 using _Traits = iterator_traits<_It>;
2008 if constexpr (requires { requires derived_from<
typename _Traits::iterator_category,
2009 forward_iterator_tag>; })
2010 return forward_iterator_tag{};
2012 return input_iterator_tag{};
2016 using iterator_concept = conditional_t<forward_iterator<_It>,
2017 forward_iterator_tag, input_iterator_tag>;
2018 using iterator_category = decltype(_S_iter_cat());
2019 using value_type = iter_value_t<_It>;
2020 using difference_type = iter_difference_t<_It>;
2021 using pointer =
typename __ptr<_It>::type;
2022 using reference = iter_reference_t<_It>;
2029 template<
typename _It>
2030 struct __counted_iter_value_type
2033 template<indirectly_readable _It>
2034 struct __counted_iter_value_type<_It>
2035 {
using value_type = iter_value_t<_It>; };
2037 template<
typename _It>
2038 struct __counted_iter_concept
2041 template<
typename _It>
2042 requires requires {
typename _It::iterator_concept; }
2043 struct __counted_iter_concept<_It>
2044 {
using iterator_concept =
typename _It::iterator_concept; };
2046 template<
typename _It>
2047 struct __counted_iter_cat
2050 template<
typename _It>
2051 requires requires {
typename _It::iterator_category; }
2052 struct __counted_iter_cat<_It>
2053 {
using iterator_category =
typename _It::iterator_category; };
2057 template<input_or_output_iterator _It>
2058 class counted_iterator
2059 :
public __detail::__counted_iter_value_type<_It>,
2060 public __detail::__counted_iter_concept<_It>,
2061 public __detail::__counted_iter_cat<_It>
2064 using iterator_type = _It;
2066 using difference_type = iter_difference_t<_It>;
2070 constexpr counted_iterator() =
default;
2073 counted_iterator(_It __i, iter_difference_t<_It> __n)
2074 : _M_current(
std::
move(__i)), _M_length(__n)
2075 { __glibcxx_assert(__n >= 0); }
2077 template<
typename _It2>
2078 requires convertible_to<const _It2&, _It>
2080 counted_iterator(
const counted_iterator<_It2>& __x)
2081 : _M_current(__x._M_current), _M_length(__x._M_length)
2084 template<
typename _It2>
2085 requires assignable_from<_It&, const _It2&>
2086 constexpr counted_iterator&
2087 operator=(
const counted_iterator<_It2>& __x)
2089 _M_current = __x._M_current;
2090 _M_length = __x._M_length;
2096 noexcept(is_nothrow_copy_constructible_v<_It>)
2097 requires copy_constructible<_It>
2098 {
return _M_current; }
2102 noexcept(is_nothrow_move_constructible_v<_It>)
2105 constexpr iter_difference_t<_It>
2106 count() const noexcept {
return _M_length; }
2108 constexpr decltype(
auto)
2110 noexcept(noexcept(*_M_current))
2111 {
return *_M_current; }
2113 constexpr decltype(
auto)
2115 noexcept(noexcept(*_M_current))
2116 requires __detail::__dereferenceable<const _It>
2117 {
return *_M_current; }
2120 operator->() const noexcept
2121 requires contiguous_iterator<_It>
2122 {
return std::to_address(_M_current); }
2124 constexpr counted_iterator&
2127 __glibcxx_assert(_M_length > 0);
2136 __glibcxx_assert(_M_length > 0);
2140 return _M_current++;
2143 __throw_exception_again;
2148 constexpr counted_iterator
2149 operator++(
int) requires forward_iterator<_It>
2156 constexpr counted_iterator&
2157 operator--() requires bidirectional_iterator<_It>
2164 constexpr counted_iterator
2165 operator--(
int) requires bidirectional_iterator<_It>
2172 constexpr counted_iterator
2173 operator+(iter_difference_t<_It> __n)
const
2174 requires random_access_iterator<_It>
2175 {
return counted_iterator(_M_current + __n, _M_length - __n); }
2177 friend constexpr counted_iterator
2178 operator+(iter_difference_t<_It> __n,
const counted_iterator& __x)
2179 requires random_access_iterator<_It>
2180 {
return __x + __n; }
2182 constexpr counted_iterator&
2183 operator+=(iter_difference_t<_It> __n)
2184 requires random_access_iterator<_It>
2186 __glibcxx_assert(__n <= _M_length);
2192 constexpr counted_iterator
2193 operator-(iter_difference_t<_It> __n)
const
2194 requires random_access_iterator<_It>
2195 {
return counted_iterator(_M_current - __n, _M_length + __n); }
2197 template<common_with<_It> _It2>
2198 friend constexpr iter_difference_t<_It2>
2200 const counted_iterator<_It2>& __y)
2201 {
return __y._M_length - __x._M_length; }
2203 friend constexpr iter_difference_t<_It>
2204 operator-(
const counted_iterator& __x, default_sentinel_t)
2205 {
return -__x._M_length; }
2207 friend constexpr iter_difference_t<_It>
2208 operator-(default_sentinel_t,
const counted_iterator& __y)
2209 {
return __y._M_length; }
2211 constexpr counted_iterator&
2212 operator-=(iter_difference_t<_It> __n)
2213 requires random_access_iterator<_It>
2215 __glibcxx_assert(-__n <= _M_length);
2221 constexpr decltype(
auto)
2222 operator[](iter_difference_t<_It> __n) const
2223 noexcept(noexcept(_M_current[__n]))
2224 requires random_access_iterator<_It>
2226 __glibcxx_assert(__n < _M_length);
2227 return _M_current[__n];
2230 template<common_with<_It> _It2>
2231 friend constexpr
bool
2232 operator==(
const counted_iterator& __x,
2233 const counted_iterator<_It2>& __y)
2234 {
return __x._M_length == __y._M_length; }
2236 friend constexpr
bool
2237 operator==(
const counted_iterator& __x, default_sentinel_t)
2238 {
return __x._M_length == 0; }
2240 template<common_with<_It> _It2>
2241 friend constexpr strong_ordering
2242 operator<=>(
const counted_iterator& __x,
2243 const counted_iterator<_It2>& __y)
2244 {
return __y._M_length <=> __x._M_length; }
2246 friend constexpr iter_rvalue_reference_t<_It>
2247 iter_move(
const counted_iterator& __i)
2248 noexcept(noexcept(ranges::iter_move(__i._M_current)))
2249 requires input_iterator<_It>
2250 {
return ranges::iter_move(__i._M_current); }
2252 template<indirectly_swappable<_It> _It2>
2253 friend constexpr
void
2254 iter_swap(
const counted_iterator& __x,
2255 const counted_iterator<_It2>& __y)
2256 noexcept(noexcept(ranges::iter_swap(__x._M_current, __y._M_current)))
2257 { ranges::iter_swap(__x._M_current, __y._M_current); }
2260 template<input_or_output_iterator _It2>
friend class counted_iterator;
2262 _It _M_current = _It();
2263 iter_difference_t<_It> _M_length = 0;
2266 template<input_iterator _It>
2267 requires same_as<__detail::__iter_traits<_It>, iterator_traits<_It>>
2268 struct iterator_traits<counted_iterator<_It>> : iterator_traits<_It>
2270 using pointer = conditional_t<contiguous_iterator<_It>,
2271 add_pointer_t<iter_reference_t<_It>>,
2278 template<
typename _Iterator>
2280 __niter_base(move_iterator<_Iterator> __it)
2281 -> decltype(make_move_iterator(__niter_base(__it.base())))
2282 {
return make_move_iterator(__niter_base(__it.base())); }
2284 template<
typename _Iterator>
2285 struct __is_move_iterator<move_iterator<_Iterator> >
2287 enum { __value = 1 };
2288 typedef __true_type __type;
2291 template<
typename _Iterator>
2293 __miter_base(move_iterator<_Iterator> __it)
2294 -> decltype(__miter_base(__it.base()))
2295 {
return __miter_base(__it.base()); }
2297 #define _GLIBCXX_MAKE_MOVE_ITERATOR(_Iter) std::make_move_iterator(_Iter)
2298 #define _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(_Iter) \
2299 std::__make_move_if_noexcept_iterator(_Iter)
2301 #define _GLIBCXX_MAKE_MOVE_ITERATOR(_Iter) (_Iter)
2302 #define _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(_Iter) (_Iter)
2305 #if __cpp_deduction_guides >= 201606
2308 template<
typename _InputIterator>
2310 typename iterator_traits<_InputIterator>::value_type::first_type>;
2312 template<
typename _InputIterator>
2313 using __iter_val_t =
2314 typename iterator_traits<_InputIterator>::value_type::second_type;
2316 template<
typename _T1,
typename _T2>
2319 template<
typename _InputIterator>
2320 using __iter_to_alloc_t =
2321 pair<add_const_t<__iter_key_t<_InputIterator>>,
2322 __iter_val_t<_InputIterator>>;
2325 _GLIBCXX_END_NAMESPACE_VERSION
2328 #ifdef _GLIBCXX_DEBUG
constexpr complex< _Tp > operator*(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x times y.
constexpr complex< _Tp > operator-(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x minus y.
constexpr complex< _Tp > operator+(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x plus y.
typename conditional< _Cond, _Iftrue, _Iffalse >::type conditional_t
Alias template for conditional.
typename remove_const< _Tp >::type remove_const_t
Alias template for remove_const.
constexpr _Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
constexpr reverse_iterator< _Iterator > make_reverse_iterator(_Iterator __i)
Generator function for reverse_iterator.
insert_iterator< _Container > inserter(_Container &__x, typename _Container::iterator __i)
constexpr front_insert_iterator< _Container > front_inserter(_Container &__x)
constexpr back_insert_iterator< _Container > back_inserter(_Container &__x)
ISO C++ entities toplevel namespace is std.
GNU extensions for public use.
Define a member typedef type to one of two argument types.
is_nothrow_copy_constructible
Traits class for iterators.
constexpr pointer operator->() const
constexpr iterator_type base() const
constexpr reverse_iterator operator+(difference_type __n) const
constexpr reverse_iterator(iterator_type __x)
constexpr reverse_iterator & operator+=(difference_type __n)
constexpr reference operator[](difference_type __n) const
constexpr reverse_iterator & operator--()
constexpr reverse_iterator(const reverse_iterator &__x)
constexpr reverse_iterator & operator-=(difference_type __n)
constexpr reverse_iterator(const reverse_iterator< _Iter > &__x)
constexpr reverse_iterator operator--(int)
constexpr reference operator*() const
constexpr reverse_iterator operator-(difference_type __n) const
constexpr reverse_iterator()
constexpr reverse_iterator operator++(int)
constexpr reverse_iterator & operator++()
Turns assignment into insertion.
constexpr back_insert_iterator operator++(int)
Simply returns *this. (This iterator does not move.)
_Container container_type
A nested typedef for the type of whatever container you used.
constexpr back_insert_iterator & operator*()
Simply returns *this.
constexpr back_insert_iterator & operator=(const typename _Container::value_type &__value)
constexpr back_insert_iterator & operator++()
Simply returns *this. (This iterator does not move.)
constexpr back_insert_iterator(_Container &__x)
The only way to create this iterator is with a container.
Turns assignment into insertion.
_Container container_type
A nested typedef for the type of whatever container you used.
constexpr front_insert_iterator operator++(int)
Simply returns *this. (This iterator does not move.)
constexpr front_insert_iterator(_Container &__x)
The only way to create this iterator is with a container.
constexpr front_insert_iterator & operator++()
Simply returns *this. (This iterator does not move.)
constexpr front_insert_iterator & operator*()
Simply returns *this.
constexpr front_insert_iterator & operator=(const typename _Container::value_type &__value)
Turns assignment into insertion.
constexpr insert_iterator & operator++()
Simply returns *this. (This iterator does not move.)
_Container container_type
A nested typedef for the type of whatever container you used.
constexpr insert_iterator & operator++(int)
Simply returns *this. (This iterator does not move.)
constexpr insert_iterator & operator=(const typename _Container::value_type &__value)
constexpr insert_iterator(_Container &__x, _Iter __i)
constexpr insert_iterator & operator*()
Simply returns *this.
Bidirectional iterators support a superset of forward iterator operations.
Random-access iterators support a superset of bidirectional iterator operations.
iterator_traits< _Iterator >::iterator_category iterator_category
One of the tag types.
void difference_type
Distance between iterators is represented as this type.