29 #ifndef _GLIBCXX_TUPLE
30 #define _GLIBCXX_TUPLE 1
32 #pragma GCC system_header
34 #if __cplusplus < 201103L
40 #include <bits/uses_allocator.h>
42 namespace std _GLIBCXX_VISIBILITY(default)
44 _GLIBCXX_BEGIN_NAMESPACE_VERSION
52 template<
typename _Tp>
54 {
typedef const _Tp& type; };
56 template<
typename _Tp>
57 struct __add_c_ref<_Tp&>
58 {
typedef _Tp& type; };
61 template<
typename _Tp>
63 {
typedef _Tp& type; };
65 template<
typename _Tp>
66 struct __add_ref<_Tp&>
67 {
typedef _Tp& type; };
70 template<
typename _Tp>
72 {
typedef _Tp&& type; };
74 template<
typename _Tp>
75 struct __add_r_ref<_Tp&>
76 {
typedef _Tp& type; };
78 template<std::
size_t _Idx,
typename _Head,
bool _IsEmptyNotFinal>
81 template<std::
size_t _Idx,
typename _Head>
82 struct _Head_base<_Idx, _Head, true>
85 constexpr _Head_base()
88 constexpr _Head_base(
const _Head& __h)
91 template<
typename _UHead,
typename =
typename
92 enable_if<!is_convertible<_UHead,
93 __uses_alloc_base>::value>::type>
94 constexpr _Head_base(_UHead&& __h)
95 : _Head(std::
forward<_UHead>(__h)) { }
97 _Head_base(__uses_alloc0)
100 template<
typename _Alloc>
101 _Head_base(__uses_alloc1<_Alloc> __a)
102 : _Head(allocator_arg, *__a._M_a) { }
104 template<
typename _Alloc>
105 _Head_base(__uses_alloc2<_Alloc> __a)
106 : _Head(*__a._M_a) { }
108 template<
typename _UHead>
109 _Head_base(__uses_alloc0, _UHead&& __uhead)
110 : _Head(std::
forward<_UHead>(__uhead)) { }
112 template<
typename _Alloc,
typename _UHead>
113 _Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead)
114 : _Head(allocator_arg, *__a._M_a, std::
forward<_UHead>(__uhead)) { }
116 template<
typename _Alloc,
typename _UHead>
117 _Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead)
118 : _Head(std::
forward<_UHead>(__uhead), *__a._M_a) { }
120 static constexpr _Head&
121 _M_head(_Head_base& __b) noexcept {
return __b; }
123 static constexpr
const _Head&
124 _M_head(
const _Head_base& __b) noexcept {
return __b; }
127 template<std::
size_t _Idx,
typename _Head>
128 struct _Head_base<_Idx, _Head, false>
130 constexpr _Head_base()
133 constexpr _Head_base(
const _Head& __h)
134 : _M_head_impl(__h) { }
136 template<
typename _UHead,
typename =
typename
137 enable_if<!is_convertible<_UHead,
138 __uses_alloc_base>::value>::type>
139 constexpr _Head_base(_UHead&& __h)
140 : _M_head_impl(std::
forward<_UHead>(__h)) { }
142 _Head_base(__uses_alloc0)
145 template<
typename _Alloc>
146 _Head_base(__uses_alloc1<_Alloc> __a)
147 : _M_head_impl(allocator_arg, *__a._M_a) { }
149 template<
typename _Alloc>
150 _Head_base(__uses_alloc2<_Alloc> __a)
151 : _M_head_impl(*__a._M_a) { }
153 template<
typename _UHead>
154 _Head_base(__uses_alloc0, _UHead&& __uhead)
155 : _M_head_impl(std::
forward<_UHead>(__uhead)) { }
157 template<
typename _Alloc,
typename _UHead>
158 _Head_base(__uses_alloc1<_Alloc> __a, _UHead&& __uhead)
159 : _M_head_impl(allocator_arg, *__a._M_a, std::
forward<_UHead>(__uhead))
162 template<
typename _Alloc,
typename _UHead>
163 _Head_base(__uses_alloc2<_Alloc> __a, _UHead&& __uhead)
164 : _M_head_impl(std::
forward<_UHead>(__uhead), *__a._M_a) { }
166 static constexpr _Head&
167 _M_head(_Head_base& __b) noexcept {
return __b._M_head_impl; }
169 static constexpr
const _Head&
170 _M_head(
const _Head_base& __b) noexcept {
return __b._M_head_impl; }
183 template<std::size_t _Idx,
typename... _Elements>
190 template<std::
size_t _Idx>
193 template<std::size_t,
typename...>
friend class _Tuple_impl;
197 template<
typename _Alloc>
200 template<
typename _Alloc>
203 template<
typename _Alloc>
210 template<
typename _Tp>
214 template<
typename _El0,
typename... _El>
215 struct __is_empty_non_tuple<tuple<_El0, _El...>> :
false_type { };
218 template<
typename _Tp>
219 using __empty_not_final
220 =
typename conditional<__is_final(_Tp),
false_type,
221 __is_empty_non_tuple<_Tp>>::type;
228 template<std::size_t _Idx,
typename _Head,
typename... _Tail>
231 private _Head_base<_Idx, _Head, __empty_not_final<_Head>::value>
233 template<std::size_t,
typename...>
friend class _Tuple_impl;
236 typedef _Head_base<_Idx, _Head, __empty_not_final<_Head>::value> _Base;
238 static constexpr _Head&
239 _M_head(
_Tuple_impl& __t) noexcept {
return _Base::_M_head(__t); }
241 static constexpr
const _Head&
242 _M_head(
const _Tuple_impl& __t) noexcept {
return _Base::_M_head(__t); }
248 _M_tail(
const _Tuple_impl& __t) noexcept {
return __t; }
254 constexpr _Tuple_impl(
const _Head& __head,
const _Tail&... __tail)
257 template<
typename _UHead,
typename... _UTail,
typename =
typename
258 enable_if<
sizeof...(_Tail) ==
sizeof...(_UTail)>::type>
260 constexpr _Tuple_impl(_UHead&& __head, _UTail&&... __tail)
261 :
_Inherited(std::forward<_UTail>(__tail)...),
262 _Base(std::forward<_UHead>(__head)) { }
264 constexpr _Tuple_impl(
const _Tuple_impl&) =
default;
267 _Tuple_impl(_Tuple_impl&& __in)
271 _Base(std::forward<_Head>(_M_head(__in))) { }
273 template<
typename... _UElements>
278 template<
typename _UHead,
typename... _UTails>
282 _Base(std::forward<_UHead>
285 template<
typename _Alloc>
288 _Base(__use_alloc<_Head>(__a)) { }
290 template<
typename _Alloc>
292 const _Head& __head,
const _Tail&... __tail)
294 _Base(__use_alloc<_Head, _Alloc, _Head>(__a), __head) { }
296 template<
typename _Alloc,
typename _UHead,
typename... _UTail,
297 typename =
typename enable_if<
sizeof...(_Tail)
298 ==
sizeof...(_UTail)>::type>
300 _UHead&& __head, _UTail&&... __tail)
301 :
_Inherited(__tag, __a, std::forward<_UTail>(__tail)...),
302 _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
303 std::forward<_UHead>(__head)) { }
305 template<
typename _Alloc>
307 const _Tuple_impl& __in)
309 _Base(__use_alloc<_Head, _Alloc, _Head>(__a), _M_head(__in)) { }
311 template<
typename _Alloc>
314 :
_Inherited(__tag, __a, std::move(_M_tail(__in))),
315 _Base(__use_alloc<_Head, _Alloc, _Head>(__a),
316 std::forward<_Head>(_M_head(__in))) { }
318 template<
typename _Alloc,
typename... _UElements>
323 _Base(__use_alloc<_Head, _Alloc, _Head>(__a),
326 template<
typename _Alloc,
typename _UHead,
typename... _UTails>
331 _Base(__use_alloc<_Head, _Alloc, _UHead>(__a),
336 operator=(
const _Tuple_impl& __in)
338 _M_head(*
this) = _M_head(__in);
339 _M_tail(*
this) = _M_tail(__in);
344 operator=(_Tuple_impl&& __in)
348 _M_head(*
this) = std::forward<_Head>(_M_head(__in));
349 _M_tail(*
this) = std::move(_M_tail(__in));
353 template<
typename... _UElements>
362 template<
typename _UHead,
typename... _UTails>
366 _M_head(*
this) = std::forward<_UHead>
368 _M_tail(*
this) = std::move
375 _M_swap(_Tuple_impl& __in)
376 noexcept(noexcept(
swap(std::declval<_Head&>(),
377 std::declval<_Head&>()))
378 && noexcept(_M_tail(__in)._M_swap(_M_tail(__in))))
381 swap(_M_head(*
this), _M_head(__in));
382 _Inherited::_M_swap(_M_tail(__in));
387 template<
typename... _Elements>
397 constexpr tuple(
const _Elements&... __elements)
400 template<
typename... _UElements,
typename =
typename
402 _Elements>...>::value>::type>
404 constexpr tuple(_UElements&&... __elements)
405 :
_Inherited(std::forward<_UElements>(__elements)...) { }
407 constexpr tuple(
const tuple&) =
default;
409 constexpr tuple(tuple&&) =
default;
411 template<
typename... _UElements,
typename =
typename
413 _Elements>...>::value>::type>
418 template<
typename... _UElements,
typename =
typename
420 _Elements>...>::value>::type>
426 template<
typename _Alloc>
430 template<
typename _Alloc>
432 const _Elements&... __elements)
435 template<
typename _Alloc,
typename... _UElements,
typename =
typename
437 ==
sizeof...(_Elements)>::type>
439 _UElements&&... __elements)
440 :
_Inherited(__tag, __a, std::forward<_UElements>(__elements)...)
443 template<
typename _Alloc>
445 :
_Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { }
447 template<
typename _Alloc>
449 :
_Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { }
451 template<
typename _Alloc,
typename... _UElements,
typename =
typename
453 ==
sizeof...(_Elements)>::type>
457 static_cast<const _Tuple_impl<0, _UElements...
>&>(__in))
460 template<
typename _Alloc,
typename... _UElements,
typename =
typename
462 ==
sizeof...(_Elements)>::type>
466 static_cast<_Tuple_impl<0, _UElements...
>&&>(__in))
470 operator=(
const tuple& __in)
477 operator=(tuple&& __in)
480 static_cast<_Inherited&
>(*this) = std::move(__in);
484 template<
typename... _UElements,
typename =
typename
486 ==
sizeof...(_Elements)>::type>
494 template<
typename... _UElements,
typename =
typename
496 ==
sizeof...(_Elements)>::type>
500 static_cast<_Inherited&
>(*this) = std::move(__in);
506 noexcept(noexcept(__in._M_swap(__in)))
507 { _Inherited::_M_swap(__in); }
520 template<
typename _T1,
typename _T2>
530 constexpr tuple(
const _T1& __a1,
const _T2& __a2)
533 template<
typename _U1,
typename _U2,
typename =
typename
537 constexpr tuple(_U1&& __a1, _U2&& __a2)
538 :
_Inherited(std::forward<_U1>(__a1), std::forward<_U2>(__a2)) { }
540 constexpr tuple(
const tuple&) =
default;
542 constexpr tuple(tuple&&) =
default;
544 template<
typename _U1,
typename _U2,
typename =
typename
550 template<
typename _U1,
typename _U2,
typename =
typename
556 template<
typename _U1,
typename _U2,
typename =
typename
562 template<
typename _U1,
typename _U2,
typename =
typename
567 std::forward<_U2>(__in.
second)) { }
571 template<
typename _Alloc>
575 template<
typename _Alloc>
577 const _T1& __a1,
const _T2& __a2)
580 template<
typename _Alloc,
typename _U1,
typename _U2>
581 tuple(
allocator_arg_t __tag,
const _Alloc& __a, _U1&& __a1, _U2&& __a2)
582 :
_Inherited(__tag, __a, std::forward<_U1>(__a1),
583 std::forward<_U2>(__a2)) { }
585 template<
typename _Alloc>
587 :
_Inherited(__tag, __a, static_cast<const _Inherited&>(__in)) { }
589 template<
typename _Alloc>
591 :
_Inherited(__tag, __a, static_cast<_Inherited&&>(__in)) { }
593 template<
typename _Alloc,
typename _U1,
typename _U2>
600 template<
typename _Alloc,
typename _U1,
typename _U2>
605 template<
typename _Alloc,
typename _U1,
typename _U2>
610 template<
typename _Alloc,
typename _U1,
typename _U2>
613 std::forward<_U2>(__in.
second)) { }
616 operator=(
const tuple& __in)
623 operator=(tuple&& __in)
626 static_cast<_Inherited&
>(*this) = std::move(__in);
630 template<
typename _U1,
typename _U2>
638 template<
typename _U1,
typename _U2>
642 static_cast<_Inherited&
>(*this) = std::move(__in);
646 template<
typename _U1,
typename _U2>
650 this->_M_head(*
this) = __in.
first;
651 this->_M_tail(*this)._M_head(*
this) = __in.
second;
655 template<
typename _U1,
typename _U2>
659 this->_M_head(*
this) = std::forward<_U1>(__in.
first);
660 this->_M_tail(*this)._M_head(*
this) = std::forward<_U2>(__in.
second);
666 noexcept(noexcept(__in._M_swap(__in)))
667 { _Inherited::_M_swap(__in); }
672 template<std::
size_t __i,
typename _Tp>
679 template<std::size_t __i,
typename _Head,
typename... _Tail>
686 template<
typename _Head,
typename... _Tail>
692 template<std::
size_t __i,
typename _Tp>
699 template<std::
size_t __i,
typename _Tp>
700 struct tuple_element<__i, volatile _Tp>
703 add_volatile<typename tuple_element<__i, _Tp>::type>::type type;
706 template<std::
size_t __i,
typename _Tp>
707 struct tuple_element<__i, const volatile _Tp>
710 add_cv<typename tuple_element<__i, _Tp>::type>::type type;
714 template<
typename _Tp>
717 template<
typename _Tp>
718 struct tuple_size<const _Tp>
719 :
public integral_constant<
720 typename remove_cv<decltype(tuple_size<_Tp>::value)>::type,
721 tuple_size<_Tp>::value> { };
723 template<
typename _Tp>
724 struct tuple_size<volatile _Tp>
725 :
public integral_constant<
726 typename remove_cv<decltype(tuple_size<_Tp>::value)>::type,
727 tuple_size<_Tp>::value> { };
729 template<
typename _Tp>
730 struct tuple_size<const volatile _Tp>
731 :
public integral_constant<
732 typename remove_cv<decltype(tuple_size<_Tp>::value)>::type,
733 tuple_size<_Tp>::value> { };
736 template<
typename... _Elements>
740 template<std::size_t __i,
typename _Head,
typename... _Tail>
741 constexpr
typename __add_ref<_Head>::type
745 template<std::size_t __i,
typename _Head,
typename... _Tail>
746 constexpr
typename __add_c_ref<_Head>::type
747 __get_helper(
const _Tuple_impl<__i, _Head, _Tail...>& __t) noexcept
748 {
return _Tuple_impl<__i, _Head, _Tail...>::_M_head(__t); }
753 template<std::size_t __i,
typename... _Elements>
754 constexpr
typename __add_ref<
755 typename tuple_element<__i, tuple<_Elements...>>::type
757 get(tuple<_Elements...>& __t) noexcept
758 {
return std::__get_helper<__i>(__t); }
760 template<std::size_t __i,
typename... _Elements>
761 constexpr
typename __add_c_ref<
762 typename tuple_element<__i, tuple<_Elements...>>::type
764 get(
const tuple<_Elements...>& __t) noexcept
765 {
return std::__get_helper<__i>(__t); }
767 template<std::size_t __i,
typename... _Elements>
768 constexpr
typename __add_r_ref<
769 typename tuple_element<__i, tuple<_Elements...>>::type
771 get(tuple<_Elements...>&& __t) noexcept
773 tuple<_Elements...>>::type&&>(get<__i>(__t)); }
776 template<std::size_t __check_equal_size, std::size_t __i, std::size_t __j,
777 typename _Tp,
typename _Up>
778 struct __tuple_compare;
780 template<std::
size_t __i, std::
size_t __j,
typename _Tp,
typename _Up>
781 struct __tuple_compare<0, __i, __j, _Tp, _Up>
783 static constexpr
bool
784 __eq(
const _Tp& __t,
const _Up& __u)
786 return (get<__i>(__t) == get<__i>(__u) &&
787 __tuple_compare<0, __i + 1, __j, _Tp, _Up>::__eq(__t, __u));
790 static constexpr
bool
791 __less(
const _Tp& __t,
const _Up& __u)
793 return ((get<__i>(__t) < get<__i>(__u))
794 || !(get<__i>(__u) < get<__i>(__t)) &&
795 __tuple_compare<0, __i + 1, __j, _Tp, _Up>::__less(__t, __u));
799 template<std::
size_t __i,
typename _Tp,
typename _Up>
800 struct __tuple_compare<0, __i, __i, _Tp, _Up>
802 static constexpr
bool
803 __eq(
const _Tp&,
const _Up&) {
return true; }
805 static constexpr
bool
806 __less(
const _Tp&,
const _Up&) {
return false; }
809 template<
typename... _TElements,
typename... _UElements>
811 operator==(
const tuple<_TElements...>& __t,
812 const tuple<_UElements...>& __u)
814 typedef tuple<_TElements...> _Tp;
815 typedef tuple<_UElements...> _Up;
816 return bool(__tuple_compare<tuple_size<_Tp>::value - tuple_size<_Up>::value,
817 0, tuple_size<_Tp>::value, _Tp, _Up>::__eq(__t, __u));
820 template<
typename... _TElements,
typename... _UElements>
822 operator<(
const tuple<_TElements...>& __t,
823 const tuple<_UElements...>& __u)
825 typedef tuple<_TElements...> _Tp;
826 typedef tuple<_UElements...> _Up;
827 return bool(__tuple_compare<tuple_size<_Tp>::value - tuple_size<_Up>::value,
828 0, tuple_size<_Tp>::value, _Tp, _Up>::__less(__t, __u));
831 template<
typename... _TElements,
typename... _UElements>
832 inline constexpr
bool
833 operator!=(
const tuple<_TElements...>& __t,
834 const tuple<_UElements...>& __u)
835 {
return !(__t == __u); }
837 template<
typename... _TElements,
typename... _UElements>
838 inline constexpr
bool
839 operator>(
const tuple<_TElements...>& __t,
840 const tuple<_UElements...>& __u)
841 {
return __u < __t; }
843 template<
typename... _TElements,
typename... _UElements>
844 inline constexpr
bool
845 operator<=(
const tuple<_TElements...>& __t,
846 const tuple<_UElements...>& __u)
847 {
return !(__u < __t); }
849 template<
typename... _TElements,
typename... _UElements>
850 inline constexpr
bool
851 operator>=(
const tuple<_TElements...>& __t,
852 const tuple<_UElements...>& __u)
853 {
return !(__t < __u); }
856 template<
typename... _Elements>
857 constexpr tuple<typename __decay_and_strip<_Elements>::__type...>
858 make_tuple(_Elements&&... __args)
860 typedef tuple<typename __decay_and_strip<_Elements>::__type...>
862 return __result_type(std::forward<_Elements>(__args)...);
865 template<
typename... _Elements>
866 tuple<_Elements&&...>
867 forward_as_tuple(_Elements&&... __args) noexcept
868 {
return tuple<_Elements&&...>(std::forward<_Elements>(__args)...); }
874 template<
typename... _Tps>
875 struct __is_tuple_like_impl<tuple<_Tps...>> :
true_type
878 template<
typename _T1,
typename _T2>
879 struct __is_tuple_like_impl<pair<_T1, _T2>> :
true_type
882 template<
typename _Tp, std::
size_t _Nm>
883 struct __is_tuple_like_impl<array<_Tp, _Nm>> :
true_type
887 template<
typename _Tp>
888 struct __is_tuple_like
889 :
public __is_tuple_like_impl<typename std::remove_cv
890 <typename std::remove_reference<_Tp>::type>::type>::type
895 template<std::size_t... _Indexes>
898 typedef _Index_tuple<_Indexes...,
sizeof...(_Indexes)> __next;
902 template<std::
size_t _Num>
903 struct _Build_index_tuple
905 typedef typename _Build_index_tuple<_Num - 1>::__type::__next __type;
909 struct _Build_index_tuple<0>
911 typedef _Index_tuple<> __type;
914 template<std::
size_t,
typename,
typename, std::
size_t>
915 struct __make_tuple_impl;
917 template<std::size_t _Idx,
typename _Tuple,
typename... _Tp,
919 struct __make_tuple_impl<_Idx, tuple<_Tp...>, _Tuple, _Nm>
921 typedef typename __make_tuple_impl<_Idx + 1, tuple<_Tp...,
926 template<std::size_t _Nm,
typename _Tuple,
typename... _Tp>
927 struct __make_tuple_impl<_Nm, tuple<_Tp...>, _Tuple, _Nm>
929 typedef tuple<_Tp...> __type;
932 template<
typename _Tuple>
933 struct __do_make_tuple
934 :
public __make_tuple_impl<0, tuple<>, _Tuple,
935 std::tuple_size<_Tuple>::value>
939 template<
typename _Tuple>
941 :
public __do_make_tuple<typename std::remove_cv
942 <typename std::remove_reference<_Tuple>::type>::type>
946 template<
typename...>
947 struct __combine_tuples;
950 struct __combine_tuples<>
952 typedef tuple<> __type;
955 template<
typename... _Ts>
956 struct __combine_tuples<tuple<_Ts...>>
958 typedef tuple<_Ts...> __type;
961 template<
typename... _T1s,
typename... _T2s,
typename... _Rem>
962 struct __combine_tuples<tuple<_T1s...>, tuple<_T2s...>, _Rem...>
964 typedef typename __combine_tuples<tuple<_T1s..., _T2s...>,
965 _Rem...>::__type __type;
969 template<
typename... _Tpls>
970 struct __tuple_cat_result
972 typedef typename __combine_tuples
978 template<
typename...>
979 struct __make_1st_indices;
982 struct __make_1st_indices<>
984 typedef std::_Index_tuple<> __type;
987 template<
typename _Tp,
typename... _Tpls>
988 struct __make_1st_indices<_Tp, _Tpls...>
991 typename std::remove_reference<_Tp>::type>::value>::__type __type;
997 template<
typename _Ret,
typename _Indices,
typename... _Tpls>
998 struct __tuple_concater;
1000 template<
typename _Ret, std::size_t... _Is,
typename _Tp,
typename... _Tpls>
1001 struct __tuple_concater<_Ret, std::_Index_tuple<_Is...>, _Tp, _Tpls...>
1003 template<
typename... _Us>
1004 static constexpr _Ret
1005 _S_do(_Tp&& __tp, _Tpls&&... __tps, _Us&&... __us)
1007 typedef typename __make_1st_indices<_Tpls...>::__type __idx;
1008 typedef __tuple_concater<_Ret, __idx, _Tpls...> __next;
1009 return __next::_S_do(std::forward<_Tpls>(__tps)...,
1010 std::forward<_Us>(__us)...,
1011 std::get<_Is>(std::forward<_Tp>(__tp))...);
1015 template<
typename _Ret>
1016 struct __tuple_concater<_Ret, std::_Index_tuple<>>
1018 template<
typename... _Us>
1019 static constexpr _Ret
1020 _S_do(_Us&&... __us)
1022 return _Ret(std::forward<_Us>(__us)...);
1027 template<
typename... _Tpls,
typename =
typename
1028 enable_if<__and_<__is_tuple_like<_Tpls>...>::value>::type>
1030 tuple_cat(_Tpls&&... __tpls)
1031 ->
typename __tuple_cat_result<_Tpls...>::__type
1033 typedef typename __tuple_cat_result<_Tpls...>::__type __ret;
1034 typedef typename __make_1st_indices<_Tpls...>::__type __idx;
1035 typedef __tuple_concater<__ret, __idx, _Tpls...> __concater;
1036 return __concater::_S_do(std::forward<_Tpls>(__tpls)...);
1040 template<
typename... _Elements>
1041 inline tuple<_Elements&...>
1042 tie(_Elements&... __args) noexcept
1043 {
return tuple<_Elements&...>(__args...); }
1046 template<
typename... _Elements>
1048 swap(tuple<_Elements...>& __x, tuple<_Elements...>& __y)
1054 struct _Swallow_assign
1057 const _Swallow_assign&
1058 operator=(
const _Tp&)
const
1062 const _Swallow_assign ignore{};
1065 template<
typename... _Types,
typename _Alloc>
1069 template<
class _T1,
class _T2>
1070 template<
typename... _Args1,
typename... _Args2>
1075 :
pair(__first, __second,
1076 typename _Build_index_tuple<sizeof...(_Args1)>::__type(),
1077 typename _Build_index_tuple<sizeof...(_Args2)>::__type())
1080 template<
class _T1,
class _T2>
1081 template<
typename... _Args1, std::size_t... _Indexes1,
1082 typename... _Args2, std::size_t... _Indexes2>
1085 pair(tuple<_Args1...>& __tuple1, tuple<_Args2...>& __tuple2,
1086 _Index_tuple<_Indexes1...>, _Index_tuple<_Indexes2...>)
1087 : first(std::
forward<_Args1>(std::get<_Indexes1>(__tuple1))...),
1088 second(std::
forward<_Args2>(std::get<_Indexes2>(__tuple2))...)
1093 _GLIBCXX_END_NAMESPACE_VERSION
1098 #endif // _GLIBCXX_TUPLE
_T1 first
second_type is the second bound type
Define a member typedef type only if a boolean constant is true.
tuple< _Elements &...> tie(_Elements &...__args) noexcept
tie
__combine_tuples< typename __make_tuple< _Tpls >::__type...>::__type __type
tuple_cat
constexpr _Tp && forward(typename std::remove_reference< _Tp >::type &__t) noexcept
Forward an lvalue.
Struct holding two objects of arbitrary type.
Declare uses_allocator so it can be specialized in <queue> etc.
integral_constant< bool, false > false_type
The type used as a compile-time boolean with false value.
is_nothrow_move_constructible
constexpr pair()
second is a copy of the second object
integral_constant< bool, true > true_type
The type used as a compile-time boolean with true value.
_T2 second
first is a copy of the first object
is_nothrow_move_assignable
void swap(function< _Res(_Args...)> &__x, function< _Res(_Args...)> &__y)
Swap the targets of two polymorphic function object wrappers.
Primary class template, tuple.