301 static constexpr const _Inherited&
302 _M_tail(
const _Tuple_impl& __t)
noexcept {
return __t; }
304 constexpr _Tuple_impl()
305 : _Inherited(), _Base() { }
308 _Tuple_impl(
const _Head& __head,
const _Tail&... __tail)
309 : _Inherited(__tail...), _Base(__head)
312 template<
typename _UHead,
typename... _UTail,
313 typename = __enable_if_t<
sizeof...(_Tail) ==
sizeof...(_UTail)>>
315 _Tuple_impl(_UHead&& __head, _UTail&&... __tail)
316 : _Inherited(
std::
forward<_UTail>(__tail)...),
320 constexpr _Tuple_impl(
const _Tuple_impl&) =
default;
324 _Tuple_impl& operator=(
const _Tuple_impl&) =
delete;
326 _Tuple_impl(_Tuple_impl&&) =
default;
328 template<
typename... _UElements>
330 _Tuple_impl(
const _Tuple_impl<_Idx, _UElements...>& __in)
331 : _Inherited(_Tuple_impl<_Idx, _UElements...>::_M_tail(__in)),
332 _Base(_Tuple_impl<_Idx, _UElements...>::_M_head(__in))
335 template<
typename _UHead,
typename... _UTails>
337 _Tuple_impl(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
339 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))),
341 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in)))
344#if __cpp_lib_ranges_zip
345 template<
typename... _UElements>
347 _Tuple_impl(_Tuple_impl<_Idx, _UElements...>& __in)
348 : _Inherited(_Tuple_impl<_Idx, _UElements...>::_M_tail(__in)),
349 _Base(_Tuple_impl<_Idx, _UElements...>::_M_head(__in))
352 template<
typename _UHead,
typename... _UTails>
354 _Tuple_impl(
const _Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
356 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))),
358 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in)))
362#if __cpp_lib_tuple_like
363 template<
typename _UTuple,
size_t... _Is>
365 _Tuple_impl(__tuple_like_tag_t, _UTuple&& __u, index_sequence<_Is...>)
370 template<
typename _Alloc>
372 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a)
373 : _Inherited(__tag, __a),
374 _Base(__tag, __use_alloc<_Head>(__a))
377 template<
typename _Alloc>
379 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a,
380 const _Head& __head,
const _Tail&... __tail)
381 : _Inherited(__tag, __a, __tail...),
382 _Base(__use_alloc<_Head, _Alloc, _Head>(__a), __head)
385 template<
typename _Alloc,
typename _UHead,
typename... _UTail,
386 typename = __enable_if_t<
sizeof...(_Tail) ==
sizeof...(_UTail)>>
388 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a,
389 _UHead&& __head, _UTail&&... __tail)
390 : _Inherited(__tag, __a,
std::
forward<_UTail>(__tail)...),
391 _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
395 template<
typename _Alloc>
397 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a,
398 const _Tuple_impl& __in)
399 : _Inherited(__tag, __a, _M_tail(__in)),
400 _Base(__use_alloc<_Head, _Alloc, _Head>(__a), _M_head(__in))
403 template<
typename _Alloc>
405 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a,
407 : _Inherited(__tag, __a,
std::
move(_M_tail(__in))),
408 _Base(__use_alloc<_Head, _Alloc, _Head>(__a),
412 template<
typename _Alloc,
typename _UHead,
typename... _UTails>
414 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a,
415 const _Tuple_impl<_Idx, _UHead, _UTails...>& __in)
416 : _Inherited(__tag, __a,
417 _Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in)),
418 _Base(__use_alloc<_Head, _Alloc, const _UHead&>(__a),
419 _Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in))
422 template<
typename _Alloc,
typename _UHead,
typename... _UTails>
424 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a,
425 _Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
426 : _Inherited(__tag, __a,
std::
move
427 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))),
428 _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
430 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in)))
433#if __cpp_lib_ranges_zip
434 template<
typename _Alloc,
typename _UHead,
typename... _UTails>
436 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a,
437 _Tuple_impl<_Idx, _UHead, _UTails...>& __in)
438 : _Inherited(__tag, __a,
439 _Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in)),
440 _Base(__use_alloc<_Head, _Alloc, _UHead&>(__a),
441 _Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in))
444 template<
typename _Alloc,
typename _UHead,
typename... _UTails>
446 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a,
447 const _Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
448 : _Inherited(__tag, __a,
std::
move
449 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in))),
450 _Base(__use_alloc<_Head, _Alloc, const _UHead>(__a),
452 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in)))
456#if __cpp_lib_tuple_like
457 template<
typename _Alloc,
typename _UTuple,
size_t... _Is>
459 _Tuple_impl(__tuple_like_tag_t, allocator_arg_t __tag,
const _Alloc& __a,
460 _UTuple&& __u, index_sequence<_Is...>)
461 : _Tuple_impl(__tag, __a,
std::get<_Is>(
std::
forward<_UTuple>(__u))...)
465 template<
typename... _UElements>
468 _M_assign(
const _Tuple_impl<_Idx, _UElements...>& __in)
470 _M_head(*
this) = _Tuple_impl<_Idx, _UElements...>::_M_head(__in);
471 _M_tail(*this)._M_assign(
472 _Tuple_impl<_Idx, _UElements...>::_M_tail(__in));
475 template<
typename _UHead,
typename... _UTails>
478 _M_assign(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
480 _M_head(*
this) = std::forward<_UHead>
481 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in));
482 _M_tail(*this)._M_assign(
483 std::move(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in)));
486#if __cpp_lib_ranges_zip
487 template<
typename... _UElements>
489 _M_assign(
const _Tuple_impl<_Idx, _UElements...>& __in)
const
491 _M_head(*
this) = _Tuple_impl<_Idx, _UElements...>::_M_head(__in);
492 _M_tail(*this)._M_assign(
493 _Tuple_impl<_Idx, _UElements...>::_M_tail(__in));
496 template<
typename _UHead,
typename... _UTails>
498 _M_assign(_Tuple_impl<_Idx, _UHead, _UTails...>&& __in)
const
500 _M_head(*
this) = std::forward<_UHead>
501 (_Tuple_impl<_Idx, _UHead, _UTails...>::_M_head(__in));
502 _M_tail(*this)._M_assign(
503 std::move(_Tuple_impl<_Idx, _UHead, _UTails...>::_M_tail(__in)));
507#if __cpp_lib_tuple_like
508 template<
typename _UTuple>
510 _M_assign(__tuple_like_tag_t __tag, _UTuple&& __u)
512 _M_head(*
this) = std::get<_Idx>(std::forward<_UTuple>(__u));
513 _M_tail(*this)._M_assign(__tag, std::forward<_UTuple>(__u));
516 template<
typename _UTuple>
518 _M_assign(__tuple_like_tag_t __tag, _UTuple&& __u)
const
520 _M_head(*
this) = std::get<_Idx>(std::forward<_UTuple>(__u));
521 _M_tail(*this)._M_assign(__tag, std::forward<_UTuple>(__u));
528 _M_swap(_Tuple_impl& __in)
531 swap(_M_head(*
this), _M_head(__in));
532 _Inherited::_M_swap(_M_tail(__in));
535#if __cpp_lib_ranges_zip
537 _M_swap(
const _Tuple_impl& __in)
const
540 swap(_M_head(*
this), _M_head(__in));
541 _Inherited::_M_swap(_M_tail(__in));
547 template<
size_t _Idx,
typename _Head>
548 struct _Tuple_impl<_Idx, _Head>
549 :
private _Head_base<_Idx, _Head>
551 template<size_t,
typename...>
friend struct _Tuple_impl;
553 typedef _Head_base<_Idx, _Head> _Base;
555 static constexpr _Head&
556 _M_head(_Tuple_impl& __t)
noexcept {
return _Base::_M_head(__t); }
558 static constexpr const _Head&
559 _M_head(
const _Tuple_impl& __t)
noexcept {
return _Base::_M_head(__t); }
566 _Tuple_impl(
const _Head& __head)
570 template<
typename _UHead>
572 _Tuple_impl(_UHead&& __head)
576 constexpr _Tuple_impl(
const _Tuple_impl&) =
default;
580 _Tuple_impl& operator=(
const _Tuple_impl&) =
delete;
582#if _GLIBCXX_INLINE_VERSION
583 _Tuple_impl(_Tuple_impl&&) =
default;
586 _Tuple_impl(_Tuple_impl&& __in)
587 noexcept(is_nothrow_move_constructible<_Head>::value)
588 : _Base(static_cast<_Base&&>(__in))
592 template<
typename _UHead>
594 _Tuple_impl(
const _Tuple_impl<_Idx, _UHead>& __in)
595 : _Base(_Tuple_impl<_Idx, _UHead>::_M_head(__in))
598 template<
typename _UHead>
600 _Tuple_impl(_Tuple_impl<_Idx, _UHead>&& __in)
601 : _Base(
std::
forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in)))
604#if __cpp_lib_ranges_zip
605 template<
typename _UHead>
607 _Tuple_impl(_Tuple_impl<_Idx, _UHead>& __in)
608 : _Base(_Tuple_impl<_Idx, _UHead>::_M_head(__in))
611 template<
typename _UHead>
613 _Tuple_impl(
const _Tuple_impl<_Idx, _UHead>&& __in)
614 : _Base(
std::
forward<const _UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in)))
618#if __cpp_lib_tuple_like
619 template<
typename _UTuple>
621 _Tuple_impl(__tuple_like_tag_t, _UTuple&& __u, index_sequence<0>)
626 template<
typename _Alloc>
628 _Tuple_impl(allocator_arg_t __tag,
const _Alloc& __a)
629 : _Base(__tag, __use_alloc<_Head>(__a))
632 template<
typename _Alloc>
634 _Tuple_impl(allocator_arg_t,
const _Alloc& __a,
636 : _Base(__use_alloc<_Head, _Alloc, const _Head&>(__a), __head)
639 template<
typename _Alloc,
typename _UHead>
641 _Tuple_impl(allocator_arg_t,
const _Alloc& __a,
643 : _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
647 template<
typename _Alloc>
649 _Tuple_impl(allocator_arg_t,
const _Alloc& __a,
650 const _Tuple_impl& __in)
651 : _Base(__use_alloc<_Head, _Alloc, const _Head&>(__a), _M_head(__in))
654 template<
typename _Alloc>
656 _Tuple_impl(allocator_arg_t,
const _Alloc& __a,
658 : _Base(__use_alloc<_Head, _Alloc, _Head>(__a),
662 template<
typename _Alloc,
typename _UHead>
664 _Tuple_impl(allocator_arg_t,
const _Alloc& __a,
665 const _Tuple_impl<_Idx, _UHead>& __in)
666 : _Base(__use_alloc<_Head, _Alloc, const _UHead&>(__a),
667 _Tuple_impl<_Idx, _UHead>::_M_head(__in))
670 template<
typename _Alloc,
typename _UHead>
672 _Tuple_impl(allocator_arg_t,
const _Alloc& __a,
673 _Tuple_impl<_Idx, _UHead>&& __in)
674 : _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
675 std::
forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in)))
678#if __cpp_lib_ranges_zip
679 template<
typename _Alloc,
typename _UHead>
681 _Tuple_impl(allocator_arg_t,
const _Alloc& __a,
682 _Tuple_impl<_Idx, _UHead>& __in)
683 : _Base(__use_alloc<_Head, _Alloc, _UHead&>(__a),
684 _Tuple_impl<_Idx, _UHead>::_M_head(__in))
687 template<
typename _Alloc,
typename _UHead>
689 _Tuple_impl(allocator_arg_t,
const _Alloc& __a,
690 const _Tuple_impl<_Idx, _UHead>&& __in)
691 : _Base(__use_alloc<_Head, _Alloc, const _UHead>(__a),
692 std::
forward<const _UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in)))
696#if __cpp_lib_tuple_like
697 template<
typename _Alloc,
typename _UTuple>
699 _Tuple_impl(__tuple_like_tag_t, allocator_arg_t __tag,
const _Alloc& __a,
700 _UTuple&& __u, index_sequence<0>)
701 : _Tuple_impl(__tag, __a,
std::get<0>(
std::
forward<_UTuple>(__u)))
705 template<
typename _UHead>
708 _M_assign(
const _Tuple_impl<_Idx, _UHead>& __in)
710 _M_head(*
this) = _Tuple_impl<_Idx, _UHead>::_M_head(__in);
713 template<
typename _UHead>
716 _M_assign(_Tuple_impl<_Idx, _UHead>&& __in)
719 = std::forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in));
722#if __cpp_lib_ranges_zip
723 template<
typename _UHead>
725 _M_assign(
const _Tuple_impl<_Idx, _UHead>& __in)
const
727 _M_head(*
this) = _Tuple_impl<_Idx, _UHead>::_M_head(__in);
730 template<
typename _UHead>
732 _M_assign(_Tuple_impl<_Idx, _UHead>&& __in)
const
735 = std::forward<_UHead>(_Tuple_impl<_Idx, _UHead>::_M_head(__in));
739#if __cpp_lib_tuple_like
740 template<
typename _UTuple>
742 _M_assign(__tuple_like_tag_t, _UTuple&& __u)
743 { _M_head(*
this) = std::get<_Idx>(std::forward<_UTuple>(__u)); }
745 template<
typename _UTuple>
747 _M_assign(__tuple_like_tag_t, _UTuple&& __u)
const
748 { _M_head(*
this) = std::get<_Idx>(std::forward<_UTuple>(__u)); }
754 _M_swap(_Tuple_impl& __in)
757 swap(_M_head(*
this), _M_head(__in));
760#if __cpp_lib_ranges_zip
762 _M_swap(
const _Tuple_impl& __in)
const
765 swap(_M_head(*
this), _M_head(__in));
772 template<bool,
typename... _Types>
773 struct _TupleConstraints
775 template<
typename... _UTypes>
776 using __constructible = __and_<is_constructible<_Types, _UTypes>...>;
778 template<
typename... _UTypes>
779 using __convertible = __and_<is_convertible<_UTypes, _Types>...>;
784 template<
typename... _UTypes>
785 static constexpr bool __is_implicitly_constructible()
787 return __and_<__constructible<_UTypes...>,
788 __convertible<_UTypes...>
795 template<
typename... _UTypes>
796 static constexpr bool __is_explicitly_constructible()
798 return __and_<__constructible<_UTypes...>,
799 __not_<__convertible<_UTypes...>>
803 static constexpr bool __is_implicitly_default_constructible()
805 return __and_<std::__is_implicitly_default_constructible<_Types>...
809 static constexpr bool __is_explicitly_default_constructible()
811 return __and_<is_default_constructible<_Types>...,
813 std::__is_implicitly_default_constructible<_Types>...>
820 template<
typename... _Types>
821 struct _TupleConstraints<false, _Types...>
823 template<
typename... _UTypes>
824 static constexpr bool __is_implicitly_constructible()
827 template<
typename... _UTypes>
828 static constexpr bool __is_explicitly_constructible()
833 template<
typename... _Elements>
838#if __cpp_concepts && __cpp_consteval && __cpp_conditional_explicit
839 template<
typename... _UTypes>
840 static consteval bool
843 if constexpr (
sizeof...(_UTypes) ==
sizeof...(_Elements))
849 template<
typename... _UTypes>
850 static consteval bool
851 __nothrow_constructible()
853 if constexpr (
sizeof...(_UTypes) ==
sizeof...(_Elements))
859 template<
typename... _UTypes>
860 static consteval bool
863 if constexpr (
sizeof...(_UTypes) ==
sizeof...(_Elements))
871 template<
typename... _UTypes>
872 static consteval bool
873 __disambiguating_constraint()
875 if constexpr (
sizeof...(_Elements) !=
sizeof...(_UTypes))
877 else if constexpr (
sizeof...(_Elements) == 1)
879 using _U0 =
typename _Nth_type<0, _UTypes...>::type;
880 return !is_same_v<remove_cvref_t<_U0>,
tuple>;
882 else if constexpr (
sizeof...(_Elements) < 4)
884 using _U0 =
typename _Nth_type<0, _UTypes...>::type;
885 if constexpr (!is_same_v<remove_cvref_t<_U0>, allocator_arg_t>)
889 using _T0 =
typename _Nth_type<0, _Elements...>::type;
890 return is_same_v<remove_cvref_t<_T0>, allocator_arg_t>;
899 template<
typename _Tuple>
900 static consteval bool
903 if constexpr (
sizeof...(_Elements) != 1)
905 else if constexpr (is_same_v<remove_cvref_t<_Tuple>,
tuple>)
909 using _Tp =
typename _Nth_type<0, _Elements...>::type;
910 if constexpr (is_convertible_v<_Tuple, _Tp>)
912 else if constexpr (is_constructible_v<_Tp, _Tuple>)
918 template<
typename... _Up>
919 static consteval bool
922#if __has_builtin(__reference_constructs_from_temporary)
923 return (__reference_constructs_from_temporary(_Elements, _Up&&)
930#if __cpp_lib_tuple_like
933 template<
typename _UTuple>
934 static consteval bool
935 __dangles_from_tuple_like()
938 return __dangles<decltype(std::get<_Is>(std::declval<_UTuple>()))...>();
942 template<
typename _UTuple>
943 static consteval bool
944 __constructible_from_tuple_like()
947 return __constructible<decltype(std::get<_Is>(std::declval<_UTuple>()))...>();
951 template<
typename _UTuple>
952 static consteval bool
953 __convertible_from_tuple_like()
956 return __convertible<decltype(std::get<_Is>(std::declval<_UTuple>()))...>();
963 explicit(!(__is_implicitly_default_constructible_v<_Elements> && ...))
965 noexcept((is_nothrow_default_constructible_v<_Elements> && ...))
966 requires (is_default_constructible_v<_Elements> && ...)
970 constexpr explicit(!__convertible<
const _Elements&...>())
971 tuple(
const _Elements&... __elements)
972 noexcept(__nothrow_constructible<
const _Elements&...>())
973 requires (__constructible<
const _Elements&...>())
977 template<
typename... _UTypes>
978 requires (__disambiguating_constraint<_UTypes...>())
979 && (__constructible<_UTypes...>())
980 && (!__dangles<_UTypes...>())
981 constexpr explicit(!__convertible<_UTypes...>())
982 tuple(_UTypes&&... __u)
983 noexcept(__nothrow_constructible<_UTypes...>())
987 template<
typename... _UTypes>
988 requires (__disambiguating_constraint<_UTypes...>())
989 && (__constructible<_UTypes...>())
990 && (__dangles<_UTypes...>())
991 tuple(_UTypes&&...) =
delete;
997 template<
typename... _UTypes>
998 requires (__constructible<
const _UTypes&...>())
999 && (!__use_other_ctor<
const tuple<_UTypes...>&>())
1000 && (!__dangles<
const _UTypes&...>())
1001 constexpr explicit(!__convertible<
const _UTypes&...>())
1003 noexcept(__nothrow_constructible<
const _UTypes&...>())
1007 template<
typename... _UTypes>
1008 requires (__constructible<
const _UTypes&...>())
1009 && (!__use_other_ctor<
const tuple<_UTypes...>&>())
1010 && (__dangles<
const _UTypes&...>())
1013 template<
typename... _UTypes>
1014 requires (__constructible<_UTypes...>())
1015 && (!__use_other_ctor<
tuple<_UTypes...>>())
1016 && (!__dangles<_UTypes...>())
1017 constexpr explicit(!__convertible<_UTypes...>())
1019 noexcept(__nothrow_constructible<_UTypes...>())
1023 template<
typename... _UTypes>
1024 requires (__constructible<_UTypes...>())
1025 && (!__use_other_ctor<
tuple<_UTypes...>>())
1026 && (__dangles<_UTypes...>())
1029#if __cpp_lib_ranges_zip
1030 template<
typename... _UTypes>
1031 requires (__constructible<_UTypes&...>())
1032 && (!__use_other_ctor<
tuple<_UTypes...>&>())
1033 && (!__dangles<_UTypes&...>())
1034 constexpr explicit(!__convertible<_UTypes&...>())
1036 noexcept(__nothrow_constructible<_UTypes&...>())
1040 template<
typename... _UTypes>
1041 requires (__constructible<_UTypes&...>())
1042 && (!__use_other_ctor<
tuple<_UTypes...>&>())
1043 && (__dangles<_UTypes&...>())
1046 template<
typename... _UTypes>
1047 requires (__constructible<
const _UTypes...>())
1048 && (!__use_other_ctor<
const tuple<_UTypes...>>())
1049 && (!__dangles<
const _UTypes...>())
1050 constexpr explicit(!__convertible<
const _UTypes...>())
1052 noexcept(__nothrow_constructible<
const _UTypes...>())
1056 template<
typename... _UTypes>
1057 requires (__constructible<
const _UTypes...>())
1058 && (!__use_other_ctor<
const tuple<_UTypes...>>())
1059 && (__dangles<
const _UTypes...>())
1063 template<
typename _U1,
typename _U2>
1064 requires (
sizeof...(_Elements) == 2)
1065 && (__constructible<const _U1&, const _U2&>())
1066 && (!__dangles<const _U1&, const _U2&>())
1067 constexpr explicit(!__convertible<const _U1&, const _U2&>())
1069 noexcept(__nothrow_constructible<const _U1&, const _U2&>())
1073 template<
typename _U1,
typename _U2>
1074 requires (
sizeof...(_Elements) == 2)
1075 && (__constructible<const _U1&, const _U2&>())
1076 && (__dangles<const _U1&, const _U2&>())
1079 template<
typename _U1,
typename _U2>
1080 requires (
sizeof...(_Elements) == 2)
1081 && (__constructible<_U1, _U2>())
1082 && (!__dangles<_U1, _U2>())
1083 constexpr explicit(!__convertible<_U1, _U2>())
1085 noexcept(__nothrow_constructible<_U1, _U2>())
1087 std::forward<_U2>(__u.second))
1090 template<
typename _U1,
typename _U2>
1091 requires (
sizeof...(_Elements) == 2)
1092 && (__constructible<_U1, _U2>())
1093 && (__dangles<_U1, _U2>())
1096#if __cpp_lib_ranges_zip
1097 template<
typename _U1,
typename _U2>
1098 requires (
sizeof...(_Elements) == 2)
1099 && (__constructible<_U1&, _U2&>())
1100 && (!__dangles<_U1&, _U2&>())
1101 constexpr explicit(!__convertible<_U1&, _U2&>())
1103 noexcept(__nothrow_constructible<_U1&, _U2&>())
1107 template<
typename _U1,
typename _U2>
1108 requires (
sizeof...(_Elements) == 2)
1109 && (__constructible<_U1&, _U2&>())
1110 && (__dangles<_U1&, _U2&>())
1113 template<
typename _U1,
typename _U2>
1114 requires (
sizeof...(_Elements) == 2)
1115 && (__constructible<const _U1, const _U2>())
1116 && (!__dangles<const _U1, const _U2>())
1117 constexpr explicit(!__convertible<const _U1, const _U2>())
1119 noexcept(__nothrow_constructible<const _U1, const _U2>())
1120 :
_Inherited(std::forward<const _U1>(__u.first),
1121 std::forward<const _U2>(__u.second))
1124 template<
typename _U1,
typename _U2>
1125 requires (
sizeof...(_Elements) == 2)
1126 && (__constructible<const _U1, const _U2>())
1127 && (__dangles<const _U1, const _U2>())
1131#if __cpp_lib_tuple_like
1132 template<__eligible_tuple_like<tuple> _UTuple>
1133 requires (__constructible_from_tuple_like<_UTuple>())
1134 && (!__use_other_ctor<_UTuple>())
1135 && (!__dangles_from_tuple_like<_UTuple>())
1136 constexpr explicit(!__convertible_from_tuple_like<_UTuple>())
1137 tuple(_UTuple&& __u)
1139 std::forward<_UTuple>(__u),
1143 template<__eligible_tuple_like<tuple> _UTuple>
1144 requires (__constructible_from_tuple_like<_UTuple>())
1145 && (!__use_other_ctor<_UTuple>())
1146 && (__dangles_from_tuple_like<_UTuple>())
1147 tuple(_UTuple&&) =
delete;
1152 template<
typename _Alloc>
1154 explicit(!(__is_implicitly_default_constructible_v<_Elements> && ...))
1155 tuple(allocator_arg_t __tag,
const _Alloc& __a)
1156 requires (is_default_constructible_v<_Elements> && ...)
1160 template<
typename _Alloc>
1161 constexpr explicit(!__convertible<
const _Elements&...>())
1162 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1163 const _Elements&... __elements)
1164 requires (__constructible<
const _Elements&...>())
1168 template<
typename _Alloc,
typename... _UTypes>
1169 requires (__disambiguating_constraint<_UTypes...>())
1170 && (__constructible<_UTypes...>())
1171 && (!__dangles<_UTypes...>())
1172 constexpr explicit(!__convertible<_UTypes...>())
1173 tuple(allocator_arg_t __tag,
const _Alloc& __a, _UTypes&&... __u)
1174 :
_Inherited(__tag, __a, std::forward<_UTypes>(__u)...)
1177 template<
typename _Alloc,
typename... _UTypes>
1178 requires (__disambiguating_constraint<_UTypes...>())
1179 && (__constructible<_UTypes...>())
1180 && (__dangles<_UTypes...>())
1181 tuple(allocator_arg_t,
const _Alloc&, _UTypes&&...) =
delete;
1183 template<
typename _Alloc>
1185 tuple(allocator_arg_t __tag,
const _Alloc& __a,
const tuple& __u)
1189 template<
typename _Alloc>
1190 requires (__constructible<_Elements...>())
1192 tuple(allocator_arg_t __tag,
const _Alloc& __a,
tuple&& __u)
1196 template<
typename _Alloc,
typename... _UTypes>
1197 requires (__constructible<
const _UTypes&...>())
1198 && (!__use_other_ctor<
const tuple<_UTypes...>&>())
1199 && (!__dangles<
const _UTypes&...>())
1200 constexpr explicit(!__convertible<
const _UTypes&...>())
1201 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1204 static_cast<const _Tuple_impl<0, _UTypes...
>&>(__u))
1207 template<
typename _Alloc,
typename... _UTypes>
1208 requires (__constructible<
const _UTypes&...>())
1209 && (!__use_other_ctor<
const tuple<_UTypes...>&>())
1210 && (__dangles<
const _UTypes&...>())
1213 template<
typename _Alloc,
typename... _UTypes>
1214 requires (__constructible<_UTypes...>())
1215 && (!__use_other_ctor<
tuple<_UTypes...>>())
1216 && (!__dangles<_UTypes...>())
1217 constexpr explicit(!__use_other_ctor<
tuple<_UTypes...>>())
1222 template<
typename _Alloc,
typename... _UTypes>
1223 requires (__constructible<_UTypes...>())
1224 && (!__use_other_ctor<
tuple<_UTypes...>>())
1225 && (__dangles<_UTypes...>())
1228#if __cpp_lib_ranges_zip
1229 template<
typename _Alloc,
typename... _UTypes>
1230 requires (__constructible<_UTypes&...>())
1231 && (!__use_other_ctor<
tuple<_UTypes...>&>())
1232 && (!__dangles<_UTypes&...>())
1233 constexpr explicit(!__convertible<_UTypes&...>())
1238 template<
typename _Alloc,
typename... _UTypes>
1239 requires (__constructible<_UTypes&...>())
1240 && (!__use_other_ctor<
tuple<_UTypes...>&>())
1241 && (__dangles<_UTypes&...>())
1244 template<
typename _Alloc,
typename... _UTypes>
1245 requires (__constructible<
const _UTypes...>())
1246 && (!__use_other_ctor<
const tuple<_UTypes...>>())
1247 && (!__dangles<
const _UTypes...>())
1248 constexpr explicit(!__convertible<
const _UTypes...>())
1249 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1252 static_cast<const _Tuple_impl<0, _UTypes...
>&&>(__u))
1255 template<
typename _Alloc,
typename... _UTypes>
1256 requires (__constructible<
const _UTypes...>())
1257 && (!__use_other_ctor<
const tuple<_UTypes...>>())
1258 && (__dangles<
const _UTypes...>())
1262 template<
typename _Alloc,
typename _U1,
typename _U2>
1263 requires (
sizeof...(_Elements) == 2)
1264 && (__constructible<const _U1&, const _U2&>())
1265 && (!__dangles<const _U1&, const _U2&>())
1266 constexpr explicit(!__convertible<const _U1&, const _U2&>())
1267 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1269 noexcept(__nothrow_constructible<const _U1&, const _U2&>())
1270 :
_Inherited(__tag, __a, __u.first, __u.second)
1273 template<
typename _Alloc,
typename _U1,
typename _U2>
1274 requires (
sizeof...(_Elements) == 2)
1275 && (__constructible<const _U1&, const _U2&>())
1276 && (__dangles<const _U1&, const _U2&>())
1279 template<
typename _Alloc,
typename _U1,
typename _U2>
1280 requires (
sizeof...(_Elements) == 2)
1281 && (__constructible<_U1, _U2>())
1282 && (!__dangles<_U1, _U2>())
1283 constexpr explicit(!__convertible<_U1, _U2>())
1285 noexcept(__nothrow_constructible<_U1, _U2>())
1289 template<
typename _Alloc,
typename _U1,
typename _U2>
1290 requires (
sizeof...(_Elements) == 2)
1291 && (__constructible<_U1, _U2>())
1292 && (__dangles<_U1, _U2>())
1295#if __cpp_lib_ranges_zip
1296 template<
typename _Alloc,
typename _U1,
typename _U2>
1297 requires (
sizeof...(_Elements) == 2)
1298 && (__constructible<_U1&, _U2&>())
1299 && (!__dangles<_U1&, _U2&>())
1300 constexpr explicit(!__convertible<_U1&, _U2&>())
1302 noexcept(__nothrow_constructible<_U1&, _U2&>())
1303 :
_Inherited(__tag, __a, __u.first, __u.second)
1306 template<
typename _Alloc,
typename _U1,
typename _U2>
1307 requires (
sizeof...(_Elements) == 2)
1308 && (__constructible<_U1&, _U2&>())
1309 && (__dangles<_U1&, _U2&>())
1312 template<
typename _Alloc,
typename _U1,
typename _U2>
1313 requires (
sizeof...(_Elements) == 2)
1314 && (__constructible<const _U1, const _U2>())
1315 && (!__dangles<const _U1, const _U2>())
1316 constexpr explicit(!__convertible<const _U1, const _U2>())
1317 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1319 noexcept(__nothrow_constructible<const _U1, const _U2>())
1323 template<
typename _Alloc,
typename _U1,
typename _U2>
1324 requires (
sizeof...(_Elements) == 2)
1325 && (__constructible<const _U1, const _U2>())
1326 && (__dangles<const _U1, const _U2>())
1330#if __cpp_lib_tuple_like
1331 template<
typename _Alloc, __eligible_tuple_like<tuple> _UTuple>
1332 requires (__constructible_from_tuple_like<_UTuple>())
1333 && (!__use_other_ctor<_UTuple>())
1334 && (!__dangles_from_tuple_like<_UTuple>())
1335 constexpr explicit(!__convertible_from_tuple_like<_UTuple>())
1336 tuple(allocator_arg_t __tag,
const _Alloc& __a, _UTuple&& __u)
1338 __tag, __a, std::forward<_UTuple>(__u),
1342 template<
typename _Alloc, __eligible_tuple_like<tuple> _UTuple>
1343 requires (__constructible_from_tuple_like<_UTuple>())
1344 && (!__use_other_ctor<_UTuple>())
1345 && (__dangles_from_tuple_like<_UTuple>())
1346 tuple(allocator_arg_t,
const _Alloc&, _UTuple&&) =
delete;
1351 template<
bool _Cond>
1352 using _TCC = _TupleConstraints<_Cond, _Elements...>;
1355 template<
bool _Dummy>
1356 using _ImplicitDefaultCtor = __enable_if_t<
1357 _TCC<_Dummy>::__is_implicitly_default_constructible(),
1361 template<
bool _Dummy>
1362 using _ExplicitDefaultCtor = __enable_if_t<
1363 _TCC<_Dummy>::__is_explicitly_default_constructible(),
1367 template<
bool _Cond,
typename... _Args>
1368 using _ImplicitCtor = __enable_if_t<
1369 _TCC<_Cond>::template __is_implicitly_constructible<_Args...>(),
1373 template<
bool _Cond,
typename... _Args>
1374 using _ExplicitCtor = __enable_if_t<
1375 _TCC<_Cond>::template __is_explicitly_constructible<_Args...>(),
1379 template<
typename... _UElements>
1380 static constexpr bool __nothrow_constructible()
1383 __and_<is_nothrow_constructible<_Elements, _UElements>...>::value;
1387 template<
typename _Up>
1388 static constexpr bool __valid_args()
1390 return sizeof...(_Elements) == 1
1395 template<
typename,
typename,
typename... _Tail>
1396 static constexpr bool __valid_args()
1397 {
return (
sizeof...(_Tail) + 2) ==
sizeof...(_Elements); }
1408 template<
typename _Tuple,
typename =
tuple,
1409 typename = __remove_cvref_t<_Tuple>>
1410 struct _UseOtherCtor
1415 template<
typename _Tuple,
typename _Tp,
typename _Up>
1416 struct _UseOtherCtor<_Tuple,
tuple<_Tp>,
tuple<_Up>>
1417 : __or_<is_convertible<_Tuple, _Tp>, is_constructible<_Tp, _Tuple>>::type
1421 template<
typename _Tuple,
typename _Tp>
1422 struct _UseOtherCtor<_Tuple,
tuple<_Tp>,
tuple<_Tp>>
1429 template<
typename _Tuple>
1430 static constexpr bool __use_other_ctor()
1431 {
return _UseOtherCtor<_Tuple>::value; }
1434#undef __glibcxx_no_dangling_refs
1435#if __has_builtin(__reference_constructs_from_temporary) \
1436 && defined _GLIBCXX_DEBUG
1438# if __cpp_fold_expressions
1439# define __glibcxx_dangling_refs(U) \
1440 (__reference_constructs_from_temporary(_Elements, U) || ...)
1442# define __glibcxx_dangling_refs(U) \
1443 __or_<__bool_constant<__reference_constructs_from_temporary(_Elements, U) \
1446# define __glibcxx_no_dangling_refs(U) \
1447 static_assert(!__glibcxx_dangling_refs(U), \
1448 "std::tuple constructor creates a dangling reference")
1450# define __glibcxx_no_dangling_refs(U)
1455 template<
typename _Dummy = void,
1456 _ImplicitDefaultCtor<is_void<_Dummy>::value> =
true>
1459 noexcept(__and_<is_nothrow_default_constructible<_Elements>...>::value)
1462 template<
typename _Dummy = void,
1463 _ExplicitDefaultCtor<is_void<_Dummy>::value> =
false>
1466 noexcept(__and_<is_nothrow_default_constructible<_Elements>...>::value)
1469 template<
bool _NotEmpty = (
sizeof...(_Elements) >= 1),
1470 _ImplicitCtor<_NotEmpty,
const _Elements&...> =
true>
1472 tuple(
const _Elements&... __elements)
1473 noexcept(__nothrow_constructible<
const _Elements&...>())
1476 template<
bool _NotEmpty = (
sizeof...(_Elements) >= 1),
1477 _ExplicitCtor<_NotEmpty,
const _Elements&...> =
false>
1479 tuple(
const _Elements&... __elements)
1480 noexcept(__nothrow_constructible<
const _Elements&...>())
1483 template<
typename... _UElements,
1484 bool _Valid = __valid_args<_UElements...>(),
1485 _ImplicitCtor<_Valid, _UElements...> =
true>
1487 tuple(_UElements&&... __elements)
1488 noexcept(__nothrow_constructible<_UElements...>())
1489 :
_Inherited(std::forward<_UElements>(__elements)...)
1490 { __glibcxx_no_dangling_refs(_UElements&&); }
1492 template<
typename... _UElements,
1493 bool _Valid = __valid_args<_UElements...>(),
1494 _ExplicitCtor<_Valid, _UElements...> =
false>
1496 tuple(_UElements&&... __elements)
1497 noexcept(__nothrow_constructible<_UElements...>())
1498 :
_Inherited(std::forward<_UElements>(__elements)...)
1499 { __glibcxx_no_dangling_refs(_UElements&&); }
1505 template<
typename... _UElements,
1506 bool _Valid = (
sizeof...(_Elements) ==
sizeof...(_UElements))
1508 _ImplicitCtor<_Valid,
const _UElements&...> =
true>
1511 noexcept(__nothrow_constructible<
const _UElements&...>())
1513 { __glibcxx_no_dangling_refs(
const _UElements&); }
1515 template<
typename... _UElements,
1516 bool _Valid = (
sizeof...(_Elements) ==
sizeof...(_UElements))
1518 _ExplicitCtor<_Valid,
const _UElements&...> =
false>
1521 noexcept(__nothrow_constructible<
const _UElements&...>())
1523 { __glibcxx_no_dangling_refs(
const _UElements&); }
1525 template<
typename... _UElements,
1526 bool _Valid = (
sizeof...(_Elements) ==
sizeof...(_UElements))
1528 _ImplicitCtor<_Valid, _UElements...> =
true>
1531 noexcept(__nothrow_constructible<_UElements...>())
1533 { __glibcxx_no_dangling_refs(_UElements&&); }
1535 template<
typename... _UElements,
1536 bool _Valid = (
sizeof...(_Elements) ==
sizeof...(_UElements))
1538 _ExplicitCtor<_Valid, _UElements...> =
false>
1541 noexcept(__nothrow_constructible<_UElements...>())
1543 { __glibcxx_no_dangling_refs(_UElements&&); }
1547 template<
typename _Alloc,
1548 _ImplicitDefaultCtor<is_object<_Alloc>::value> =
true>
1549 _GLIBCXX20_CONSTEXPR
1550 tuple(allocator_arg_t __tag,
const _Alloc& __a)
1553 template<
typename _Alloc,
1554 _ExplicitDefaultCtor<is_object<_Alloc>::value> =
false>
1555 _GLIBCXX20_CONSTEXPR
1557 tuple(allocator_arg_t __tag,
const _Alloc& __a)
1560 template<
typename _Alloc,
bool _NotEmpty = (
sizeof...(_Elements) >= 1),
1561 _ImplicitCtor<_NotEmpty,
const _Elements&...> =
true>
1562 _GLIBCXX20_CONSTEXPR
1563 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1564 const _Elements&... __elements)
1567 template<
typename _Alloc,
bool _NotEmpty = (
sizeof...(_Elements) >= 1),
1568 _ExplicitCtor<_NotEmpty,
const _Elements&...> =
false>
1569 _GLIBCXX20_CONSTEXPR
1571 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1572 const _Elements&... __elements)
1575 template<
typename _Alloc,
typename... _UElements,
1576 bool _Valid = __valid_args<_UElements...>(),
1577 _ImplicitCtor<_Valid, _UElements...> =
true>
1578 _GLIBCXX20_CONSTEXPR
1579 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1580 _UElements&&... __elements)
1581 :
_Inherited(__tag, __a, std::forward<_UElements>(__elements)...)
1582 { __glibcxx_no_dangling_refs(_UElements&&); }
1584 template<
typename _Alloc,
typename... _UElements,
1585 bool _Valid = __valid_args<_UElements...>(),
1586 _ExplicitCtor<_Valid, _UElements...> =
false>
1587 _GLIBCXX20_CONSTEXPR
1589 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1590 _UElements&&... __elements)
1591 :
_Inherited(__tag, __a, std::forward<_UElements>(__elements)...)
1592 { __glibcxx_no_dangling_refs(_UElements&&); }
1594 template<
typename _Alloc>
1595 _GLIBCXX20_CONSTEXPR
1596 tuple(allocator_arg_t __tag,
const _Alloc& __a,
const tuple& __in)
1599 template<
typename _Alloc>
1600 _GLIBCXX20_CONSTEXPR
1601 tuple(allocator_arg_t __tag,
const _Alloc& __a,
tuple&& __in)
1604 template<
typename _Alloc,
typename... _UElements,
1605 bool _Valid = (
sizeof...(_Elements) ==
sizeof...(_UElements))
1607 _ImplicitCtor<_Valid,
const _UElements&...> =
true>
1608 _GLIBCXX20_CONSTEXPR
1609 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1612 static_cast<const _Tuple_impl<0, _UElements...
>&>(__in))
1613 { __glibcxx_no_dangling_refs(
const _UElements&); }
1615 template<
typename _Alloc,
typename... _UElements,
1616 bool _Valid = (
sizeof...(_Elements) ==
sizeof...(_UElements))
1618 _ExplicitCtor<_Valid,
const _UElements&...> =
false>
1619 _GLIBCXX20_CONSTEXPR
1621 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1624 static_cast<const _Tuple_impl<0, _UElements...
>&>(__in))
1625 { __glibcxx_no_dangling_refs(
const _UElements&); }
1627 template<
typename _Alloc,
typename... _UElements,
1628 bool _Valid = (
sizeof...(_Elements) ==
sizeof...(_UElements))
1630 _ImplicitCtor<_Valid, _UElements...> =
true>
1631 _GLIBCXX20_CONSTEXPR
1632 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1635 static_cast<_Tuple_impl<0, _UElements...
>&&>(__in))
1636 { __glibcxx_no_dangling_refs(_UElements&&); }
1638 template<
typename _Alloc,
typename... _UElements,
1639 bool _Valid = (
sizeof...(_Elements) ==
sizeof...(_UElements))
1641 _ExplicitCtor<_Valid, _UElements...> =
false>
1642 _GLIBCXX20_CONSTEXPR
1644 tuple(allocator_arg_t __tag,
const _Alloc& __a,
1647 static_cast<_Tuple_impl<0, _UElements...
>&&>(__in))
1648 { __glibcxx_no_dangling_refs(_UElements&&); }
1653#if __cpp_concepts && __cpp_consteval
1655 template<
typename... _UTypes>
1656 static consteval bool
1659 if constexpr (
sizeof...(_UTypes) ==
sizeof...(_Elements))
1665 template<
typename... _UTypes>
1666 static consteval bool
1667 __nothrow_assignable()
1669 if constexpr (
sizeof...(_UTypes) ==
sizeof...(_Elements))
1675#if __cpp_lib_ranges_zip
1676 template<
typename... _UTypes>
1677 static consteval bool
1678 __const_assignable()
1680 if constexpr (
sizeof...(_UTypes) ==
sizeof...(_Elements))
1687#if __cpp_lib_tuple_like
1688 template<
typename _UTuple>
1689 static consteval bool
1690 __assignable_from_tuple_like()
1693 return __assignable<decltype(std::get<_Is>(std::declval<_UTuple>()))...>();
1697 template<
typename _UTuple>
1698 static consteval bool
1699 __const_assignable_from_tuple_like()
1702 return __const_assignable<decltype(std::get<_Is>(std::declval<_UTuple>()))...>();
1712 operator=(
const tuple& __u)
1713 noexcept(__nothrow_assignable<
const _Elements&...>())
1714 requires (__assignable<
const _Elements&...>())
1716 this->_M_assign(__u);
1721 operator=(
tuple&& __u)
1722 noexcept(__nothrow_assignable<_Elements...>())
1723 requires (__assignable<_Elements...>())
1729 template<
typename... _UTypes>
1730 requires (__assignable<
const _UTypes&...>())
1733 noexcept(__nothrow_assignable<
const _UTypes&...>())
1735 this->_M_assign(__u);
1739 template<
typename... _UTypes>
1740 requires (__assignable<_UTypes...>())
1743 noexcept(__nothrow_assignable<_UTypes...>())
1749#if __cpp_lib_ranges_zip
1750 constexpr const tuple&
1751 operator=(
const tuple& __u)
const
1752 requires (__const_assignable<
const _Elements&...>())
1754 this->_M_assign(__u);
1758 constexpr const tuple&
1759 operator=(
tuple&& __u)
const
1760 requires (__const_assignable<_Elements...>())
1766 template<
typename... _UTypes>
1767 constexpr const tuple&
1769 requires (__const_assignable<
const _UTypes&...>())
1771 this->_M_assign(__u);
1775 template<
typename... _UTypes>
1776 constexpr const tuple&
1778 requires (__const_assignable<_UTypes...>())
1785 template<
typename _U1,
typename _U2>
1786 requires (__assignable<const _U1&, const _U2&>())
1789 noexcept(__nothrow_assignable<const _U1&, const _U2&>())
1791 this->_M_head(*
this) = __u.first;
1792 this->_M_tail(*this)._M_head(*
this) = __u.second;
1796 template<
typename _U1,
typename _U2>
1797 requires (__assignable<_U1, _U2>())
1800 noexcept(__nothrow_assignable<_U1, _U2>())
1802 this->_M_head(*
this) = std::forward<_U1>(__u.first);
1803 this->_M_tail(*this)._M_head(*
this) = std::forward<_U2>(__u.second);
1807#if __cpp_lib_ranges_zip
1808 template<
typename _U1,
typename _U2>
1809 requires (__const_assignable<const _U1&, const _U2>())
1810 constexpr const tuple&
1813 this->_M_head(*
this) = __u.first;
1814 this->_M_tail(*this)._M_head(*
this) = __u.second;
1818 template<
typename _U1,
typename _U2>
1819 requires (__const_assignable<_U1, _U2>())
1820 constexpr const tuple&
1823 this->_M_head(*
this) = std::forward<_U1>(__u.first);
1824 this->_M_tail(*this)._M_head(*
this) = std::forward<_U2>(__u.second);
1829#if __cpp_lib_tuple_like
1830 template<__eligible_tuple_like<tuple> _UTuple>
1831 requires (__assignable_from_tuple_like<_UTuple>())
1833 operator=(_UTuple&& __u)
1835 this->_M_assign(__tuple_like_tag_t{}, std::forward<_UTuple>(__u));
1839 template<__eligible_tuple_like<tuple> _UTuple>
1840 requires (__const_assignable_from_tuple_like<_UTuple>())
1841 constexpr const tuple&
1842 operator=(_UTuple&& __u)
const
1844 this->_M_assign(__tuple_like_tag_t{}, std::forward<_UTuple>(__u));
1848 template<__tuple_like _UTuple>
1849 requires (!__is_tuple_v<_UTuple>)
1850 friend constexpr bool
1851 operator==(
const tuple& __t,
const _UTuple& __u)
1853 static_assert(
sizeof...(_Elements) == tuple_size_v<_UTuple>,
1854 "tuple objects can only be compared if they have equal sizes.");
1856 return (
bool(std::get<_Is>(__t) == std::get<_Is>(__u))
1861 template<__tuple_like _UTuple,
1863 struct __tuple_like_common_comparison_category;
1865 template<__tuple_like _UTuple,
size_t... _Is>
1867 {
typename void_t<__detail::__synth3way_t<_Elements, tuple_element_t<_Is, _UTuple>>...>; }
1868 struct __tuple_like_common_comparison_category<_UTuple,
index_sequence<_Is...>>
1870 using type = common_comparison_category_t
1871 <__detail::__synth3way_t<_Elements, tuple_element_t<_Is, _UTuple>>...>;
1874 template<__tuple_like _UTuple>
1875 requires (!__is_tuple_v<_UTuple>)
1876 friend constexpr typename __tuple_like_common_comparison_category<_UTuple>::type
1877 operator<=>(
const tuple& __t,
const _UTuple& __u)
1879 using _Cat =
typename __tuple_like_common_comparison_category<_UTuple>::type;
1887 template<
typename... _UElements>
1889 __enable_if_t<
sizeof...(_UElements) ==
sizeof...(_Elements),
bool>
1891 {
return __and_<is_assignable<_Elements&, _UElements>...>::value; }
1894 template<
typename... _UElements>
1895 static constexpr bool __nothrow_assignable()
1898 __and_<is_nothrow_assignable<_Elements&, _UElements>...>::value;
1903 _GLIBCXX20_CONSTEXPR
1905 operator=(__conditional_t<__assignable<const _Elements&...>(),
1907 const __nonesuch&> __in)
1908 noexcept(__nothrow_assignable<
const _Elements&...>())
1910 this->_M_assign(__in);
1914 _GLIBCXX20_CONSTEXPR
1916 operator=(__conditional_t<__assignable<_Elements...>(),
1919 noexcept(__nothrow_assignable<_Elements...>())
1925 template<
typename... _UElements>
1926 _GLIBCXX20_CONSTEXPR
1927 __enable_if_t<__assignable<
const _UElements&...>(),
tuple&>
1929 noexcept(__nothrow_assignable<
const _UElements&...>())
1931 this->_M_assign(__in);
1935 template<
typename... _UElements>
1936 _GLIBCXX20_CONSTEXPR
1937 __enable_if_t<__assignable<_UElements...>(),
tuple&>
1939 noexcept(__nothrow_assignable<_UElements...>())
1947 _GLIBCXX20_CONSTEXPR
1950 noexcept(__and_<__is_nothrow_swappable<_Elements>...>::value)
1951 { _Inherited::_M_swap(__in); }
1953#if __cpp_lib_ranges_zip
1961 swap(
const tuple& __in)
const
1962 noexcept(__and_v<__is_nothrow_swappable<const _Elements>...>)
1963 requires (is_swappable_v<const _Elements> && ...)
1964 { _Inherited::_M_swap(__in); }
1968#if __cpp_deduction_guides >= 201606
1969 template<
typename... _UTypes>
1971 template<
typename _T1,
typename _T2>
1973 template<
typename _Alloc,
typename... _UTypes>
1974 tuple(allocator_arg_t, _Alloc, _UTypes...) ->
tuple<_UTypes...>;
1975 template<
typename _Alloc,
typename _T1,
typename _T2>
1977 template<
typename _Alloc,
typename... _UTypes>
1986 _GLIBCXX20_CONSTEXPR
1987 void swap(
tuple&)
noexcept { }
1988#if __cpp_lib_ranges_zip
1989 constexpr void swap(
const tuple&)
const noexcept { }
1995 template<
typename _Alloc>
1996 _GLIBCXX20_CONSTEXPR
1997 tuple(allocator_arg_t,
const _Alloc&)
noexcept { }
1998 template<
typename _Alloc>
1999 _GLIBCXX20_CONSTEXPR
2000 tuple(allocator_arg_t,
const _Alloc&,
const tuple&)
noexcept { }
2003#if !(__cpp_concepts && __cpp_consteval && __cpp_conditional_explicit)
2006 template<typename _T1, typename _T2>
2012 template<
bool _Dummy,
typename _U1,
typename _U2>
2013 using _ImplicitDefaultCtor = __enable_if_t<
2014 _TupleConstraints<_Dummy, _U1, _U2>::
2015 __is_implicitly_default_constructible(),
2019 template<
bool _Dummy,
typename _U1,
typename _U2>
2020 using _ExplicitDefaultCtor = __enable_if_t<
2021 _TupleConstraints<_Dummy, _U1, _U2>::
2022 __is_explicitly_default_constructible(),
2025 template<
bool _Dummy>
2026 using _TCC = _TupleConstraints<_Dummy, _T1, _T2>;
2029 template<
bool _Cond,
typename _U1,
typename _U2>
2030 using _ImplicitCtor = __enable_if_t<
2031 _TCC<_Cond>::template __is_implicitly_constructible<_U1, _U2>(),
2035 template<
bool _Cond,
typename _U1,
typename _U2>
2036 using _ExplicitCtor = __enable_if_t<
2037 _TCC<_Cond>::template __is_explicitly_constructible<_U1, _U2>(),
2040 template<
typename _U1,
typename _U2>
2041 static constexpr bool __assignable()
2043 return __and_<is_assignable<_T1&, _U1>,
2047 template<
typename _U1,
typename _U2>
2048 static constexpr bool __nothrow_assignable()
2050 return __and_<is_nothrow_assignable<_T1&, _U1>,
2054 template<
typename _U1,
typename _U2>
2055 static constexpr bool __nothrow_constructible()
2057 return __and_<is_nothrow_constructible<_T1, _U1>,
2061 static constexpr bool __nothrow_default_constructible()
2063 return __and_<is_nothrow_default_constructible<_T1>,
2067 template<
typename _U1>
2068 static constexpr bool __is_alloc_arg()
2072#undef __glibcxx_no_dangling_refs
2074#if __has_builtin(__reference_constructs_from_temporary) \
2075 && defined _GLIBCXX_DEBUG
2076# define __glibcxx_no_dangling_refs(_U1, _U2) \
2077 static_assert(!__reference_constructs_from_temporary(_T1, _U1) \
2078 && !__reference_constructs_from_temporary(_T2, _U2), \
2079 "std::tuple constructor creates a dangling reference")
2081# define __glibcxx_no_dangling_refs(_U1, _U2)
2086 template<
bool _Dummy =
true,
2087 _ImplicitDefaultCtor<_Dummy, _T1, _T2> =
true>
2090 noexcept(__nothrow_default_constructible())
2093 template<
bool _Dummy =
true,
2094 _ExplicitDefaultCtor<_Dummy, _T1, _T2> =
false>
2097 noexcept(__nothrow_default_constructible())
2100 template<
bool _Dummy =
true,
2101 _ImplicitCtor<_Dummy, const _T1&, const _T2&> =
true>
2103 tuple(
const _T1& __a1,
const _T2& __a2)
2104 noexcept(__nothrow_constructible<const _T1&, const _T2&>())
2107 template<
bool _Dummy =
true,
2108 _ExplicitCtor<_Dummy, const _T1&, const _T2&> =
false>
2110 tuple(
const _T1& __a1,
const _T2& __a2)
2111 noexcept(__nothrow_constructible<const _T1&, const _T2&>())
2114 template<
typename _U1,
typename _U2,
2115 _ImplicitCtor<!__is_alloc_arg<_U1>(), _U1, _U2> =
true>
2117 tuple(_U1&& __a1, _U2&& __a2)
2118 noexcept(__nothrow_constructible<_U1, _U2>())
2119 :
_Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2))
2120 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2122 template<
typename _U1,
typename _U2,
2123 _ExplicitCtor<!__is_alloc_arg<_U1>(), _U1, _U2> =
false>
2125 tuple(_U1&& __a1, _U2&& __a2)
2126 noexcept(__nothrow_constructible<_U1, _U2>())
2127 :
_Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2))
2128 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2134 template<
typename _U1,
typename _U2,
2135 _ImplicitCtor<true, const _U1&, const _U2&> =
true>
2138 noexcept(__nothrow_constructible<const _U1&, const _U2&>())
2140 { __glibcxx_no_dangling_refs(
const _U1&,
const _U2&); }
2142 template<
typename _U1,
typename _U2,
2143 _ExplicitCtor<true, const _U1&, const _U2&> =
false>
2146 noexcept(__nothrow_constructible<const _U1&, const _U2&>())
2148 { __glibcxx_no_dangling_refs(
const _U1&,
const _U2&); }
2150 template<
typename _U1,
typename _U2,
2151 _ImplicitCtor<true, _U1, _U2> =
true>
2154 noexcept(__nothrow_constructible<_U1, _U2>())
2156 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2158 template<
typename _U1,
typename _U2,
2159 _ExplicitCtor<true, _U1, _U2> =
false>
2162 noexcept(__nothrow_constructible<_U1, _U2>())
2164 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2166 template<
typename _U1,
typename _U2,
2167 _ImplicitCtor<true, const _U1&, const _U2&> =
true>
2170 noexcept(__nothrow_constructible<const _U1&, const _U2&>())
2172 { __glibcxx_no_dangling_refs(
const _U1&,
const _U2&); }
2174 template<
typename _U1,
typename _U2,
2175 _ExplicitCtor<true, const _U1&, const _U2&> =
false>
2178 noexcept(__nothrow_constructible<const _U1&, const _U2&>())
2180 { __glibcxx_no_dangling_refs(
const _U1&,
const _U2&); }
2182 template<
typename _U1,
typename _U2,
2183 _ImplicitCtor<true, _U1, _U2> =
true>
2186 noexcept(__nothrow_constructible<_U1, _U2>())
2188 std::forward<_U2>(__in.second))
2189 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2191 template<
typename _U1,
typename _U2,
2192 _ExplicitCtor<true, _U1, _U2> =
false>
2195 noexcept(__nothrow_constructible<_U1, _U2>())
2197 std::forward<_U2>(__in.second))
2198 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2202 template<
typename _Alloc,
2203 _ImplicitDefaultCtor<is_object<_Alloc>::value, _T1, _T2> =
true>
2204 _GLIBCXX20_CONSTEXPR
2205 tuple(allocator_arg_t __tag,
const _Alloc& __a)
2208 template<
typename _Alloc,
2209 _ExplicitDefaultCtor<is_object<_Alloc>::value, _T1, _T2> =
false>
2210 _GLIBCXX20_CONSTEXPR
2212 tuple(allocator_arg_t __tag,
const _Alloc& __a)
2215 template<
typename _Alloc,
bool _Dummy =
true,
2216 _ImplicitCtor<_Dummy, const _T1&, const _T2&> =
true>
2217 _GLIBCXX20_CONSTEXPR
2218 tuple(allocator_arg_t __tag,
const _Alloc& __a,
2219 const _T1& __a1,
const _T2& __a2)
2222 template<
typename _Alloc,
bool _Dummy =
true,
2223 _ExplicitCtor<_Dummy, const _T1&, const _T2&> =
false>
2225 _GLIBCXX20_CONSTEXPR
2226 tuple(allocator_arg_t __tag,
const _Alloc& __a,
2227 const _T1& __a1,
const _T2& __a2)
2230 template<
typename _Alloc,
typename _U1,
typename _U2,
2231 _ImplicitCtor<true, _U1, _U2> =
true>
2232 _GLIBCXX20_CONSTEXPR
2233 tuple(allocator_arg_t __tag,
const _Alloc& __a, _U1&& __a1, _U2&& __a2)
2234 :
_Inherited(__tag, __a, std::forward<_U1>(__a1),
2235 std::forward<_U2>(__a2))
2236 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2238 template<
typename _Alloc,
typename _U1,
typename _U2,
2239 _ExplicitCtor<true, _U1, _U2> =
false>
2241 _GLIBCXX20_CONSTEXPR
2242 tuple(allocator_arg_t __tag,
const _Alloc& __a,
2243 _U1&& __a1, _U2&& __a2)
2244 :
_Inherited(__tag, __a, std::forward<_U1>(__a1),
2245 std::forward<_U2>(__a2))
2246 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2248 template<
typename _Alloc>
2249 _GLIBCXX20_CONSTEXPR
2250 tuple(allocator_arg_t __tag,
const _Alloc& __a,
const tuple& __in)
2253 template<
typename _Alloc>
2254 _GLIBCXX20_CONSTEXPR
2255 tuple(allocator_arg_t __tag,
const _Alloc& __a,
tuple&& __in)
2258 template<
typename _Alloc,
typename _U1,
typename _U2,
2259 _ImplicitCtor<true, const _U1&, const _U2&> =
true>
2260 _GLIBCXX20_CONSTEXPR
2261 tuple(allocator_arg_t __tag,
const _Alloc& __a,
2265 { __glibcxx_no_dangling_refs(
const _U1&,
const _U2&); }
2267 template<
typename _Alloc,
typename _U1,
typename _U2,
2268 _ExplicitCtor<true, const _U1&, const _U2&> =
false>
2270 _GLIBCXX20_CONSTEXPR
2271 tuple(allocator_arg_t __tag,
const _Alloc& __a,
2275 { __glibcxx_no_dangling_refs(
const _U1&,
const _U2&); }
2277 template<
typename _Alloc,
typename _U1,
typename _U2,
2278 _ImplicitCtor<true, _U1, _U2> =
true>
2279 _GLIBCXX20_CONSTEXPR
2282 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2284 template<
typename _Alloc,
typename _U1,
typename _U2,
2285 _ExplicitCtor<true, _U1, _U2> =
false>
2287 _GLIBCXX20_CONSTEXPR
2290 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2292 template<
typename _Alloc,
typename _U1,
typename _U2,
2293 _ImplicitCtor<true, const _U1&, const _U2&> =
true>
2294 _GLIBCXX20_CONSTEXPR
2295 tuple(allocator_arg_t __tag,
const _Alloc& __a,
2297 :
_Inherited(__tag, __a, __in.first, __in.second)
2298 { __glibcxx_no_dangling_refs(
const _U1&,
const _U2&); }
2300 template<
typename _Alloc,
typename _U1,
typename _U2,
2301 _ExplicitCtor<true, const _U1&, const _U2&> =
false>
2303 _GLIBCXX20_CONSTEXPR
2304 tuple(allocator_arg_t __tag,
const _Alloc& __a,
2306 :
_Inherited(__tag, __a, __in.first, __in.second)
2307 { __glibcxx_no_dangling_refs(
const _U1&,
const _U2&); }
2309 template<
typename _Alloc,
typename _U1,
typename _U2,
2310 _ImplicitCtor<true, _U1, _U2> =
true>
2311 _GLIBCXX20_CONSTEXPR
2313 :
_Inherited(__tag, __a, std::forward<_U1>(__in.first),
2314 std::forward<_U2>(__in.second))
2315 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2317 template<
typename _Alloc,
typename _U1,
typename _U2,
2318 _ExplicitCtor<true, _U1, _U2> =
false>
2320 _GLIBCXX20_CONSTEXPR
2322 :
_Inherited(__tag, __a, std::forward<_U1>(__in.first),
2323 std::forward<_U2>(__in.second))
2324 { __glibcxx_no_dangling_refs(_U1&&, _U2&&); }
2328 _GLIBCXX20_CONSTEXPR
2330 operator=(__conditional_t<__assignable<const _T1&, const _T2&>(),
2332 const __nonesuch&> __in)
2333 noexcept(__nothrow_assignable<const _T1&, const _T2&>())
2335 this->_M_assign(__in);
2339 _GLIBCXX20_CONSTEXPR
2341 operator=(__conditional_t<__assignable<_T1, _T2>(),
2344 noexcept(__nothrow_assignable<_T1, _T2>())
2350 template<
typename _U1,
typename _U2>
2351 _GLIBCXX20_CONSTEXPR
2352 __enable_if_t<__assignable<const _U1&, const _U2&>(),
tuple&>
2354 noexcept(__nothrow_assignable<const _U1&, const _U2&>())
2356 this->_M_assign(__in);
2360 template<
typename _U1,
typename _U2>
2361 _GLIBCXX20_CONSTEXPR
2362 __enable_if_t<__assignable<_U1, _U2>(),
tuple&>
2364 noexcept(__nothrow_assignable<_U1, _U2>())
2370 template<
typename _U1,
typename _U2>
2371 _GLIBCXX20_CONSTEXPR
2372 __enable_if_t<__assignable<const _U1&, const _U2&>(),
tuple&>
2374 noexcept(__nothrow_assignable<const _U1&, const _U2&>())
2376 this->_M_head(*
this) = __in.first;
2377 this->_M_tail(*this)._M_head(*
this) = __in.second;
2381 template<
typename _U1,
typename _U2>
2382 _GLIBCXX20_CONSTEXPR
2383 __enable_if_t<__assignable<_U1, _U2>(),
tuple&>
2385 noexcept(__nothrow_assignable<_U1, _U2>())
2387 this->_M_head(*
this) = std::forward<_U1>(__in.first);
2388 this->_M_tail(*this)._M_head(*
this) = std::forward<_U2>(__in.second);
2392 _GLIBCXX20_CONSTEXPR
2395 noexcept(__and_<__is_nothrow_swappable<_T1>,
2396 __is_nothrow_swappable<_T2>>::value)
2397 { _Inherited::_M_swap(__in); }
2402 template<
typename... _Elements>
2406#if __cplusplus >= 201703L
2407 template<
typename... _Types>
2408 inline constexpr size_t tuple_size_v<
tuple<_Types...>>
2409 =
sizeof...(_Types);
2411 template<
typename... _Types>
2412 inline constexpr size_t tuple_size_v<
const tuple<_Types...>>
2413 =
sizeof...(_Types);
2417 template<
size_t __i,
typename... _Types>
2420 static_assert(__i <
sizeof...(_Types),
"tuple index must be in range");
2422 using type =
typename _Nth_type<__i, _Types...>::type;
2425 template<
size_t __i,
typename _Head,
typename... _Tail>
2430 template<
size_t __i,
typename _Head,
typename... _Tail>
2431 constexpr const _Head&
2432 __get_helper(
const _Tuple_impl<__i, _Head, _Tail...>& __t)
noexcept
2433 {
return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); }
2436 template<
size_t __i,
typename... _Types>
2437 __enable_if_t<(__i >=
sizeof...(_Types))>
2438 __get_helper(
const tuple<_Types...>&) =
delete;
2441 template<
size_t __i,
typename... _Elements>
2442 constexpr __tuple_element_t<__i, tuple<_Elements...>>&
2444 {
return std::__get_helper<__i>(__t); }
2447 template<
size_t __i,
typename... _Elements>
2448 constexpr const __tuple_element_t<__i, tuple<_Elements...>>&
2450 {
return std::__get_helper<__i>(__t); }
2453 template<
size_t __i,
typename... _Elements>
2454 constexpr __tuple_element_t<__i, tuple<_Elements...>>&&
2457 typedef __tuple_element_t<__i,
tuple<_Elements...>> __element_type;
2458 return std::forward<__element_type>(std::__get_helper<__i>(__t));
2462 template<
size_t __i,
typename... _Elements>
2463 constexpr const __tuple_element_t<__i, tuple<_Elements...>>&&
2466 typedef __tuple_element_t<__i,
tuple<_Elements...>> __element_type;
2467 return std::forward<const __element_type>(std::__get_helper<__i>(__t));
2472 template<
size_t __i,
typename... _Elements>
2473 constexpr __enable_if_t<(__i >=
sizeof...(_Elements))>
2474 get(
const tuple<_Elements...>&) =
delete;
2477#ifdef __cpp_lib_tuples_by_type
2479 template <typename _Tp, typename... _Types>
2481 get(tuple<_Types...>& __t)
noexcept
2483 constexpr size_t __idx = __find_uniq_type_in_pack<_Tp, _Types...>();
2484 static_assert(__idx <
sizeof...(_Types),
2485 "the type T in std::get<T> must occur exactly once in the tuple");
2486 return std::__get_helper<__idx>(__t);
2490 template <
typename _Tp,
typename... _Types>
2492 get(tuple<_Types...>&& __t)
noexcept
2494 constexpr size_t __idx = __find_uniq_type_in_pack<_Tp, _Types...>();
2495 static_assert(__idx <
sizeof...(_Types),
2496 "the type T in std::get<T> must occur exactly once in the tuple");
2497 return std::forward<_Tp>(std::__get_helper<__idx>(__t));
2501 template <
typename _Tp,
typename... _Types>
2502 constexpr const _Tp&
2503 get(
const tuple<_Types...>& __t)
noexcept
2505 constexpr size_t __idx = __find_uniq_type_in_pack<_Tp, _Types...>();
2506 static_assert(__idx <
sizeof...(_Types),
2507 "the type T in std::get<T> must occur exactly once in the tuple");
2508 return std::__get_helper<__idx>(__t);
2513 template <
typename _Tp,
typename... _Types>
2514 constexpr const _Tp&&
2515 get(
const tuple<_Types...>&& __t)
noexcept
2517 constexpr size_t __idx = __find_uniq_type_in_pack<_Tp, _Types...>();
2518 static_assert(__idx <
sizeof...(_Types),
2519 "the type T in std::get<T> must occur exactly once in the tuple");
2520 return std::forward<const _Tp>(std::__get_helper<__idx>(__t));
2525 template<
typename _Tp,
typename _Up,
size_t __i,
size_t __size>
2526 struct __tuple_compare
2528 static constexpr bool
2529 __eq(
const _Tp& __t,
const _Up& __u)
2531 return bool(std::get<__i>(__t) == std::get<__i>(__u))
2532 && __tuple_compare<_Tp, _Up, __i + 1, __size>::__eq(__t, __u);
2535 static constexpr bool
2536 __less(
const _Tp& __t,
const _Up& __u)
2538 return bool(std::get<__i>(__t) < std::get<__i>(__u))
2539 || (!bool(std::get<__i>(__u) < std::get<__i>(__t))
2540 && __tuple_compare<_Tp, _Up, __i + 1, __size>::__less(__t, __u));
2544 template<
typename _Tp,
typename _Up,
size_t __size>
2545 struct __tuple_compare<_Tp, _Up, __size, __size>
2547 static constexpr bool
2548 __eq(
const _Tp&,
const _Up&) {
return true; }
2550 static constexpr bool
2551 __less(
const _Tp&,
const _Up&) {
return false; }
2554 template<
typename... _TElements,
typename... _UElements>
2556 operator==(
const tuple<_TElements...>& __t,
2557 const tuple<_UElements...>& __u)
2559 static_assert(
sizeof...(_TElements) ==
sizeof...(_UElements),
2560 "tuple objects can only be compared if they have equal sizes.");
2561 using __compare = __tuple_compare<tuple<_TElements...>,
2562 tuple<_UElements...>,
2563 0,
sizeof...(_TElements)>;
2564 return __compare::__eq(__t, __u);
2567#if __cpp_lib_three_way_comparison
2568 template<
typename _Cat,
typename _Tp,
typename _Up>
2570 __tuple_cmp(
const _Tp&,
const _Up&, index_sequence<>)
2571 {
return _Cat::equivalent; }
2573 template<
typename _Cat,
typename _Tp,
typename _Up,
2574 size_t _Idx0,
size_t... _Idxs>
2576 __tuple_cmp(
const _Tp& __t,
const _Up& __u,
2577 index_sequence<_Idx0, _Idxs...>)
2580 = __detail::__synth3way(std::get<_Idx0>(__t), std::get<_Idx0>(__u));
2583 return std::__tuple_cmp<_Cat>(__t, __u, index_sequence<_Idxs...>());
2586 template<
typename... _Tps,
typename... _Ups>
2588 common_comparison_category_t<__detail::__synth3way_t<_Tps, _Ups>...>
2589 operator<=>(
const tuple<_Tps...>& __t,
const tuple<_Ups...>& __u)
2592 = common_comparison_category_t<__detail::__synth3way_t<_Tps, _Ups>...>;
2593 return std::__tuple_cmp<_Cat>(__t, __u, index_sequence_for<_Tps...>());
2596 template<
typename... _TElements,
typename... _UElements>
2598 operator<(
const tuple<_TElements...>& __t,
2599 const tuple<_UElements...>& __u)
2601 static_assert(
sizeof...(_TElements) ==
sizeof...(_UElements),
2602 "tuple objects can only be compared if they have equal sizes.");
2603 using __compare = __tuple_compare<tuple<_TElements...>,
2604 tuple<_UElements...>,
2605 0,
sizeof...(_TElements)>;
2606 return __compare::__less(__t, __u);
2609 template<
typename... _TElements,
typename... _UElements>
2611 operator!=(
const tuple<_TElements...>& __t,
2612 const tuple<_UElements...>& __u)
2613 {
return !(__t == __u); }
2615 template<
typename... _TElements,
typename... _UElements>
2617 operator>(
const tuple<_TElements...>& __t,
2618 const tuple<_UElements...>& __u)
2619 {
return __u < __t; }
2621 template<
typename... _TElements,
typename... _UElements>
2624 const tuple<_UElements...>& __u)
2625 {
return !(__u < __t); }
2627 template<
typename... _TElements,
typename... _UElements>
2630 const tuple<_UElements...>& __u)
2631 {
return !(__t < __u); }
2636 template<
typename... _Elements>
2637 constexpr tuple<typename __decay_and_strip<_Elements>::__type...>
2642 return __result_type(std::forward<_Elements>(__args)...);
2648 template<
typename... _Elements>
2649 constexpr tuple<_Elements&&...>
2651 {
return tuple<_Elements&&...>(std::forward<_Elements>(__args)...); }
2654 template<
size_t,
typename,
typename,
size_t>
2655 struct __make_tuple_impl;
2657 template<
size_t _Idx,
typename _Tuple,
typename... _Tp,
size_t _Nm>
2658 struct __make_tuple_impl<_Idx, tuple<_Tp...>, _Tuple, _Nm>
2659 : __make_tuple_impl<_Idx + 1,
2660 tuple<_Tp..., __tuple_element_t<_Idx, _Tuple>>,
2664 template<
size_t _Nm,
typename _Tuple,
typename... _Tp>
2665 struct __make_tuple_impl<_Nm, tuple<_Tp...>, _Tuple, _Nm>
2667 typedef tuple<_Tp...> __type;
2670 template<
typename _Tuple>
2671 struct __do_make_tuple
2672 : __make_tuple_impl<0, tuple<>, _Tuple, tuple_size<_Tuple>::value>
2676 template<
typename _Tuple>
2678 :
public __do_make_tuple<__remove_cvref_t<_Tuple>>
2682 template<
typename...>
2683 struct __combine_tuples;
2686 struct __combine_tuples<>
2688 typedef tuple<> __type;
2691 template<
typename... _Ts>
2692 struct __combine_tuples<tuple<_Ts...>>
2694 typedef tuple<_Ts...> __type;
2697 template<
typename... _T1s,
typename... _T2s,
typename... _Rem>
2698 struct __combine_tuples<tuple<_T1s...>, tuple<_T2s...>, _Rem...>
2700 typedef typename __combine_tuples<tuple<_T1s..., _T2s...>,
2701 _Rem...>::__type __type;
2705 template<
typename... _Tpls>
2706 struct __tuple_cat_result
2708 typedef typename __combine_tuples
2709 <
typename __make_tuple<_Tpls>::__type...>::__type __type;
2714 template<
typename...>
2715 struct __make_1st_indices;
2718 struct __make_1st_indices<>
2720 typedef _Index_tuple<> __type;
2723 template<
typename _Tp,
typename... _Tpls>
2724 struct __make_1st_indices<_Tp, _Tpls...>
2726 typedef typename _Build_index_tuple<tuple_size<
2727 typename remove_reference<_Tp>::type>::value>::__type __type;
2733 template<
typename _Ret,
typename _Indices,
typename... _Tpls>
2734 struct __tuple_concater;
2736 template<
typename _Ret,
size_t... _Is,
typename _Tp,
typename... _Tpls>
2737 struct __tuple_concater<_Ret, _Index_tuple<_Is...>, _Tp, _Tpls...>
2739 template<
typename... _Us>
2740 static constexpr _Ret
2741 _S_do(_Tp&& __tp, _Tpls&&... __tps, _Us&&... __us)
2743 typedef typename __make_1st_indices<_Tpls...>::__type __idx;
2744 typedef __tuple_concater<_Ret, __idx, _Tpls...> __next;
2745 return __next::_S_do(std::forward<_Tpls>(__tps)...,
2746 std::forward<_Us>(__us)...,
2747 std::get<_Is>(std::forward<_Tp>(__tp))...);
2751 template<
typename _Ret>
2752 struct __tuple_concater<_Ret, _Index_tuple<>>
2754 template<
typename... _Us>
2755 static constexpr _Ret
2756 _S_do(_Us&&... __us)
2758 return _Ret(std::forward<_Us>(__us)...);
2762 template<
typename... _Tps>
2763 struct __is_tuple_like_impl<tuple<_Tps...>> :
true_type
2768#if __cpp_lib_tuple_like
2769 template<__tuple_like... _Tpls>
2771 template<
typename... _Tpls,
typename =
typename
2772 enable_if<__and_<__is_tuple_like<_Tpls>...>::value>::type>
2776 ->
typename __tuple_cat_result<_Tpls...>::__type
2778 typedef typename __tuple_cat_result<_Tpls...>::__type __ret;
2779 typedef typename __make_1st_indices<_Tpls...>::__type __idx;
2780 typedef __tuple_concater<__ret, __idx, _Tpls...> __concater;
2781 return __concater::_S_do(std::forward<_Tpls>(__tpls)...);
2787 template<
typename... _Elements>
2788 constexpr tuple<_Elements&...>
2789 tie(_Elements&... __args)
noexcept
2790 {
return tuple<_Elements&...>(__args...); }
2793 template<
typename... _Elements>
2794 _GLIBCXX20_CONSTEXPR
2796#if __cplusplus > 201402L || !defined(__STRICT_ANSI__)
2798 typename enable_if<__and_<__is_swappable<_Elements>...>::value
2804 noexcept(
noexcept(__x.swap(__y)))
2807#if __cpp_lib_ranges_zip
2808 template<
typename... _Elements>
2809 requires (is_swappable_v<const _Elements> && ...)
2811 swap(
const tuple<_Elements...>& __x,
const tuple<_Elements...>& __y)
2812 noexcept(
noexcept(__x.swap(__y)))
2816#if __cplusplus > 201402L || !defined(__STRICT_ANSI__)
2818 template<typename... _Elements>
2819 _GLIBCXX20_CONSTEXPR
2820 typename enable_if<!__and_<__is_swappable<_Elements>...>::value>::type
2821 swap(tuple<_Elements...>&, tuple<_Elements...>&) =
delete;
2828 struct _Swallow_assign
2831 _GLIBCXX14_CONSTEXPR
const _Swallow_assign&
2832 operator=(
const _Tp&)
const
2853 _GLIBCXX17_INLINE
constexpr _Swallow_assign
ignore{};
2856 template<
typename... _Types,
typename _Alloc>
2868 template<
class _T1,
class _T2>
2869 template<
typename... _Args1,
typename... _Args2>
2870 _GLIBCXX20_CONSTEXPR
2875 :
pair(__first, __second,
2876 typename _Build_index_tuple<sizeof...(_Args1)>::__type(),
2877 typename _Build_index_tuple<sizeof...(_Args2)>::__type())