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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_TUPLE
#define _LIBCPP_TUPLE
/*
tuple synopsis
namespace std
{
template <class... T>
class tuple {
public:
explicit(see-below) constexpr tuple();
explicit(see-below) tuple(const T&...); // constexpr in C++14
template <class... U>
explicit(see-below) tuple(U&&...); // constexpr in C++14
tuple(const tuple&) = default;
tuple(tuple&&) = default;
template <class... U>
explicit(see-below) tuple(const tuple<U...>&); // constexpr in C++14
template <class... U>
explicit(see-below) tuple(tuple<U...>&&); // constexpr in C++14
template <class U1, class U2>
explicit(see-below) tuple(const pair<U1, U2>&); // iff sizeof...(T) == 2 // constexpr in C++14
template <class U1, class U2>
explicit(see-below) tuple(pair<U1, U2>&&); // iff sizeof...(T) == 2 // constexpr in C++14
// allocator-extended constructors
template <class Alloc>
tuple(allocator_arg_t, const Alloc& a);
template <class Alloc>
explicit(see-below) tuple(allocator_arg_t, const Alloc& a, const T&...); // constexpr in C++20
template <class Alloc, class... U>
explicit(see-below) tuple(allocator_arg_t, const Alloc& a, U&&...); // constexpr in C++20
template <class Alloc>
tuple(allocator_arg_t, const Alloc& a, const tuple&); // constexpr in C++20
template <class Alloc>
tuple(allocator_arg_t, const Alloc& a, tuple&&); // constexpr in C++20
template <class Alloc, class... U>
explicit(see-below) tuple(allocator_arg_t, const Alloc& a, const tuple<U...>&); // constexpr in C++20
template <class Alloc, class... U>
explicit(see-below) tuple(allocator_arg_t, const Alloc& a, tuple<U...>&&); // constexpr in C++20
template <class Alloc, class U1, class U2>
explicit(see-below) tuple(allocator_arg_t, const Alloc& a, const pair<U1, U2>&); // constexpr in C++20
template <class Alloc, class U1, class U2>
explicit(see-below) tuple(allocator_arg_t, const Alloc& a, pair<U1, U2>&&); // constexpr in C++20
tuple& operator=(const tuple&); // constexpr in C++20
tuple& operator=(tuple&&) noexcept(is_nothrow_move_assignable_v<T> && ...); // constexpr in C++20
template <class... U>
tuple& operator=(const tuple<U...>&); // constexpr in C++20
template <class... U>
tuple& operator=(tuple<U...>&&); // constexpr in C++20
template <class U1, class U2>
tuple& operator=(const pair<U1, U2>&); // iff sizeof...(T) == 2 // constexpr in C++20
template <class U1, class U2>
tuple& operator=(pair<U1, U2>&&); // iff sizeof...(T) == 2 // constexpr in C++20
template<class U, size_t N>
tuple& operator=(array<U, N> const&) // iff sizeof...(T) == N, EXTENSION
template<class U, size_t N>
tuple& operator=(array<U, N>&&) // iff sizeof...(T) == N, EXTENSION
void swap(tuple&) noexcept(AND(swap(declval<T&>(), declval<T&>())...)); // constexpr in C++20
};
template<class... TTypes, class... UTypes, template<class> class TQual, template<class> class UQual> // since C++23
requires requires { typename tuple<common_reference_t<TQual<TTypes>, UQual<UTypes>>...>; }
struct basic_common_reference<tuple<TTypes...>, tuple<UTypes...>, TQual, UQual> {
using type = tuple<common_reference_t<TQual<TTypes>, UQual<UTypes>>...>;
};
template<class... TTypes, class... UTypes> // since C++23
requires requires { typename tuple<common_type_t<TTypes, UTypes>...>; }
struct common_type<tuple<TTypes...>, tuple<UTypes...>> {
using type = tuple<common_type_t<TTypes, UTypes>...>;
};
template <class ...T>
tuple(T...) -> tuple<T...>; // since C++17
template <class T1, class T2>
tuple(pair<T1, T2>) -> tuple<T1, T2>; // since C++17
template <class Alloc, class ...T>
tuple(allocator_arg_t, Alloc, T...) -> tuple<T...>; // since C++17
template <class Alloc, class T1, class T2>
tuple(allocator_arg_t, Alloc, pair<T1, T2>) -> tuple<T1, T2>; // since C++17
template <class Alloc, class ...T>
tuple(allocator_arg_t, Alloc, tuple<T...>) -> tuple<T...>; // since C++17
inline constexpr unspecified ignore;
template <class... T> tuple<V...> make_tuple(T&&...); // constexpr in C++14
template <class... T> tuple<ATypes...> forward_as_tuple(T&&...) noexcept; // constexpr in C++14
template <class... T> tuple<T&...> tie(T&...) noexcept; // constexpr in C++14
template <class... Tuples> tuple<CTypes...> tuple_cat(Tuples&&... tpls); // constexpr in C++14
// [tuple.apply], calling a function with a tuple of arguments:
template <class F, class Tuple>
constexpr decltype(auto) apply(F&& f, Tuple&& t); // C++17
template <class T, class Tuple>
constexpr T make_from_tuple(Tuple&& t); // C++17
// 20.4.1.4, tuple helper classes:
template <class T> struct tuple_size; // undefined
template <class... T> struct tuple_size<tuple<T...>>;
template <class T>
inline constexpr size_t tuple_size_v = tuple_size<T>::value; // C++17
template <size_t I, class T> struct tuple_element; // undefined
template <size_t I, class... T> struct tuple_element<I, tuple<T...>>;
template <size_t I, class T>
using tuple_element_t = typename tuple_element <I, T>::type; // C++14
// 20.4.1.5, element access:
template <size_t I, class... T>
typename tuple_element<I, tuple<T...>>::type&
get(tuple<T...>&) noexcept; // constexpr in C++14
template <size_t I, class... T>
const typename tuple_element<I, tuple<T...>>::type&
get(const tuple<T...>&) noexcept; // constexpr in C++14
template <size_t I, class... T>
typename tuple_element<I, tuple<T...>>::type&&
get(tuple<T...>&&) noexcept; // constexpr in C++14
template <size_t I, class... T>
const typename tuple_element<I, tuple<T...>>::type&&
get(const tuple<T...>&&) noexcept; // constexpr in C++14
template <class T1, class... T>
constexpr T1& get(tuple<T...>&) noexcept; // C++14
template <class T1, class... T>
constexpr const T1& get(const tuple<T...>&) noexcept; // C++14
template <class T1, class... T>
constexpr T1&& get(tuple<T...>&&) noexcept; // C++14
template <class T1, class... T>
constexpr const T1&& get(const tuple<T...>&&) noexcept; // C++14
// 20.4.1.6, relational operators:
template<class... T, class... U> bool operator==(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14
template<class... T, class... U> bool operator<(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20
template<class... T, class... U> bool operator!=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20
template<class... T, class... U> bool operator>(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20
template<class... T, class... U> bool operator<=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20
template<class... T, class... U> bool operator>=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20
template<class... T, class... U>
constexpr common_comparison_category_t<synth-three-way-result<T, U>...>
operator<=>(const tuple<T...>&, const tuple<U...>&); // since C++20
template <class... Types, class Alloc>
struct uses_allocator<tuple<Types...>, Alloc>;
template <class... Types>
void
swap(tuple<Types...>& x, tuple<Types...>& y) noexcept(noexcept(x.swap(y)));
} // std
*/
#include <__assert> // all public C++ headers provide the assertion handler
#include <__compare/common_comparison_category.h>
#include <__compare/synth_three_way.h>
#include <__config>
#include <__functional/unwrap_ref.h>
#include <__memory/allocator_arg_t.h>
#include <__memory/uses_allocator.h>
#include <__tuple>
#include <__utility/forward.h>
#include <__utility/integer_sequence.h>
#include <__utility/move.h>
#include <__utility/pair.h>
#include <__utility/piecewise_construct.h>
#include <__utility/swap.h>
#include <compare>
#include <cstddef>
#include <type_traits>
#include <version>
// TODO: remove these headers
#include <__functional/binary_function.h>
#include <__functional/invoke.h>
#include <__functional/operations.h>
#include <__functional/reference_wrapper.h>
#include <__functional/unary_function.h>
#include <__functional/weak_result_type.h>
#include <exception>
#include <new>
#include <typeinfo>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#ifndef _LIBCPP_CXX03_LANG
// __tuple_leaf
template <size_t _Ip, class _Hp,
bool=is_empty<_Hp>::value && !__libcpp_is_final<_Hp>::value
>
class __tuple_leaf;
template <size_t _Ip, class _Hp, bool _Ep>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
void swap(__tuple_leaf<_Ip, _Hp, _Ep>& __x, __tuple_leaf<_Ip, _Hp, _Ep>& __y)
_NOEXCEPT_(__is_nothrow_swappable<_Hp>::value)
{
swap(__x.get(), __y.get());
}
template <size_t _Ip, class _Hp, bool>
class __tuple_leaf
{
_Hp __value_;
template <class _Tp>
static constexpr bool __can_bind_reference() {
#if __has_keyword(__reference_binds_to_temporary)
return !__reference_binds_to_temporary(_Hp, _Tp);
#else
return true;
#endif
}
_LIBCPP_CONSTEXPR_AFTER_CXX11
__tuple_leaf& operator=(const __tuple_leaf&);
public:
_LIBCPP_INLINE_VISIBILITY constexpr __tuple_leaf()
_NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) : __value_()
{static_assert(!is_reference<_Hp>::value,
"Attempted to default construct a reference element in a tuple");}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
__tuple_leaf(integral_constant<int, 0>, const _Alloc&)
: __value_()
{static_assert(!is_reference<_Hp>::value,
"Attempted to default construct a reference element in a tuple");}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
__tuple_leaf(integral_constant<int, 1>, const _Alloc& __a)
: __value_(allocator_arg_t(), __a)
{static_assert(!is_reference<_Hp>::value,
"Attempted to default construct a reference element in a tuple");}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
__tuple_leaf(integral_constant<int, 2>, const _Alloc& __a)
: __value_(__a)
{static_assert(!is_reference<_Hp>::value,
"Attempted to default construct a reference element in a tuple");}
template <class _Tp,
class = __enable_if_t<
_And<
_IsNotSame<__uncvref_t<_Tp>, __tuple_leaf>,
is_constructible<_Hp, _Tp>
>::value
>
>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value))
: __value_(_VSTD::forward<_Tp>(__t))
{static_assert(__can_bind_reference<_Tp&&>(),
"Attempted construction of reference element binds to a temporary whose lifetime has ended");}
template <class _Tp, class _Alloc>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t)
: __value_(_VSTD::forward<_Tp>(__t))
{static_assert(__can_bind_reference<_Tp&&>(),
"Attempted construction of reference element binds to a temporary whose lifetime has ended");}
template <class _Tp, class _Alloc>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t)
: __value_(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t))
{static_assert(!is_reference<_Hp>::value,
"Attempted to uses-allocator construct a reference element in a tuple");}
template <class _Tp, class _Alloc>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t)
: __value_(_VSTD::forward<_Tp>(__t), __a)
{static_assert(!is_reference<_Hp>::value,
"Attempted to uses-allocator construct a reference element in a tuple");}
__tuple_leaf(const __tuple_leaf& __t) = default;
__tuple_leaf(__tuple_leaf&& __t) = default;
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
int swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value)
{
_VSTD::swap(*this, __t);
return 0;
}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 _Hp& get() _NOEXCEPT {return __value_;}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const _Hp& get() const _NOEXCEPT {return __value_;}
};
template <size_t _Ip, class _Hp>
class __tuple_leaf<_Ip, _Hp, true>
: private _Hp
{
_LIBCPP_CONSTEXPR_AFTER_CXX11
__tuple_leaf& operator=(const __tuple_leaf&);
public:
_LIBCPP_INLINE_VISIBILITY constexpr __tuple_leaf()
_NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) {}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
__tuple_leaf(integral_constant<int, 0>, const _Alloc&) {}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
__tuple_leaf(integral_constant<int, 1>, const _Alloc& __a)
: _Hp(allocator_arg_t(), __a) {}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
__tuple_leaf(integral_constant<int, 2>, const _Alloc& __a)
: _Hp(__a) {}
template <class _Tp,
class = __enable_if_t<
_And<
_IsNotSame<__uncvref_t<_Tp>, __tuple_leaf>,
is_constructible<_Hp, _Tp>
>::value
>
>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value))
: _Hp(_VSTD::forward<_Tp>(__t)) {}
template <class _Tp, class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t)
: _Hp(_VSTD::forward<_Tp>(__t)) {}
template <class _Tp, class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t)
: _Hp(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t)) {}
template <class _Tp, class _Alloc>
_LIBCPP_INLINE_VISIBILITY constexpr
explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t)
: _Hp(_VSTD::forward<_Tp>(__t), __a) {}
__tuple_leaf(__tuple_leaf const &) = default;
__tuple_leaf(__tuple_leaf &&) = default;
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
int
swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value)
{
_VSTD::swap(*this, __t);
return 0;
}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 _Hp& get() _NOEXCEPT {return static_cast<_Hp&>(*this);}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const _Hp& get() const _NOEXCEPT {return static_cast<const _Hp&>(*this);}
};
template <class ..._Tp>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
void __swallow(_Tp&&...) _NOEXCEPT {}
template <class _Tp>
struct __all_default_constructible;
template <class ..._Tp>
struct __all_default_constructible<__tuple_types<_Tp...>>
: __all<is_default_constructible<_Tp>::value...>
{ };
// __tuple_impl
template<class _Indx, class ..._Tp> struct __tuple_impl;
template<size_t ..._Indx, class ..._Tp>
struct _LIBCPP_DECLSPEC_EMPTY_BASES __tuple_impl<__tuple_indices<_Indx...>, _Tp...>
: public __tuple_leaf<_Indx, _Tp>...
{
_LIBCPP_INLINE_VISIBILITY
constexpr __tuple_impl()
_NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {}
template <size_t ..._Uf, class ..._Tf,
size_t ..._Ul, class ..._Tl, class ..._Up>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit
__tuple_impl(__tuple_indices<_Uf...>, __tuple_types<_Tf...>,
__tuple_indices<_Ul...>, __tuple_types<_Tl...>,
_Up&&... __u)
_NOEXCEPT_((__all<is_nothrow_constructible<_Tf, _Up>::value...>::value &&
__all<is_nothrow_default_constructible<_Tl>::value...>::value)) :
__tuple_leaf<_Uf, _Tf>(_VSTD::forward<_Up>(__u))...,
__tuple_leaf<_Ul, _Tl>()...
{}
template <class _Alloc, size_t ..._Uf, class ..._Tf,
size_t ..._Ul, class ..._Tl, class ..._Up>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit
__tuple_impl(allocator_arg_t, const _Alloc& __a,
__tuple_indices<_Uf...>, __tuple_types<_Tf...>,
__tuple_indices<_Ul...>, __tuple_types<_Tl...>,
_Up&&... __u) :
__tuple_leaf<_Uf, _Tf>(__uses_alloc_ctor<_Tf, _Alloc, _Up>(), __a,
_VSTD::forward<_Up>(__u))...,
__tuple_leaf<_Ul, _Tl>(__uses_alloc_ctor<_Tl, _Alloc>(), __a)...
{}
template <class _Tuple,
class = typename enable_if
<
__tuple_constructible<_Tuple, tuple<_Tp...> >::value
>::type
>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
__tuple_impl(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_constructible<_Tp, typename tuple_element<_Indx,
typename __make_tuple_types<_Tuple>::type>::type>::value...>::value))
: __tuple_leaf<_Indx, _Tp>(_VSTD::forward<typename tuple_element<_Indx,
typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))...
{}
template <class _Alloc, class _Tuple,
class = typename enable_if
<
__tuple_constructible<_Tuple, tuple<_Tp...> >::value
>::type
>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
__tuple_impl(allocator_arg_t, const _Alloc& __a, _Tuple&& __t)
: __tuple_leaf<_Indx, _Tp>(__uses_alloc_ctor<_Tp, _Alloc, typename tuple_element<_Indx,
typename __make_tuple_types<_Tuple>::type>::type>(), __a,
_VSTD::forward<typename tuple_element<_Indx,
typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))...
{}
__tuple_impl(const __tuple_impl&) = default;
__tuple_impl(__tuple_impl&&) = default;
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
void swap(__tuple_impl& __t)
_NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value)
{
_VSTD::__swallow(__tuple_leaf<_Indx, _Tp>::swap(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t))...);
}
};
template<class _Dest, class _Source, size_t ..._Np>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
void __memberwise_copy_assign(_Dest& __dest, _Source const& __source, __tuple_indices<_Np...>) {
_VSTD::__swallow(((_VSTD::get<_Np>(__dest) = _VSTD::get<_Np>(__source)), void(), 0)...);
}
template<class _Dest, class _Source, class ..._Up, size_t ..._Np>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
void __memberwise_forward_assign(_Dest& __dest, _Source&& __source, __tuple_types<_Up...>, __tuple_indices<_Np...>) {
_VSTD::__swallow(((
_VSTD::get<_Np>(__dest) = _VSTD::forward<_Up>(_VSTD::get<_Np>(__source))
), void(), 0)...);
}
template <class ..._Tp>
class _LIBCPP_TEMPLATE_VIS tuple
{
typedef __tuple_impl<typename __make_tuple_indices<sizeof...(_Tp)>::type, _Tp...> _BaseT;
_BaseT __base_;
template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11
typename tuple_element<_Jp, tuple<_Up...> >::type& get(tuple<_Up...>&) _NOEXCEPT;
template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11
const typename tuple_element<_Jp, tuple<_Up...> >::type& get(const tuple<_Up...>&) _NOEXCEPT;
template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11
typename tuple_element<_Jp, tuple<_Up...> >::type&& get(tuple<_Up...>&&) _NOEXCEPT;
template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11
const typename tuple_element<_Jp, tuple<_Up...> >::type&& get(const tuple<_Up...>&&) _NOEXCEPT;
public:
// [tuple.cnstr]
// tuple() constructors (including allocator_arg_t variants)
template <template<class...> class _IsImpDefault = __is_implicitly_default_constructible, __enable_if_t<
_And<
_IsImpDefault<_Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
tuple()
_NOEXCEPT_(_And<is_nothrow_default_constructible<_Tp>...>::value)
{ }
template <template<class...> class _IsImpDefault = __is_implicitly_default_constructible,
template<class...> class _IsDefault = is_default_constructible, __enable_if_t<
_And<
_IsDefault<_Tp>...,
_Not<_Lazy<_And, _IsImpDefault<_Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
explicit tuple()
_NOEXCEPT_(_And<is_nothrow_default_constructible<_Tp>...>::value)
{ }
template <class _Alloc, template<class...> class _IsImpDefault = __is_implicitly_default_constructible, __enable_if_t<
_And<
_IsImpDefault<_Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, _Alloc const& __a)
: __base_(allocator_arg_t(), __a,
__tuple_indices<>(), __tuple_types<>(),
typename __make_tuple_indices<sizeof...(_Tp), 0>::type(),
__tuple_types<_Tp...>()) {}
template <class _Alloc,
template<class...> class _IsImpDefault = __is_implicitly_default_constructible,
template<class...> class _IsDefault = is_default_constructible, __enable_if_t<
_And<
_IsDefault<_Tp>...,
_Not<_Lazy<_And, _IsImpDefault<_Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
explicit tuple(allocator_arg_t, _Alloc const& __a)
: __base_(allocator_arg_t(), __a,
__tuple_indices<>(), __tuple_types<>(),
typename __make_tuple_indices<sizeof...(_Tp), 0>::type(),
__tuple_types<_Tp...>()) {}
// tuple(const T&...) constructors (including allocator_arg_t variants)
template <template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) >= 1>,
is_copy_constructible<_Tp>...,
is_convertible<const _Tp&, _Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple(const _Tp& ... __t)
_NOEXCEPT_(_And<is_nothrow_copy_constructible<_Tp>...>::value)
: __base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
typename __make_tuple_indices<0>::type(),
typename __make_tuple_types<tuple, 0>::type(),
__t...
) {}
template <template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) >= 1>,
is_copy_constructible<_Tp>...,
_Not<_Lazy<_And, is_convertible<const _Tp&, _Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit tuple(const _Tp& ... __t)
_NOEXCEPT_(_And<is_nothrow_copy_constructible<_Tp>...>::value)
: __base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
typename __make_tuple_indices<0>::type(),
typename __make_tuple_types<tuple, 0>::type(),
__t...
) {}
template <class _Alloc, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) >= 1>,
is_copy_constructible<_Tp>...,
is_convertible<const _Tp&, _Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t)
: __base_(allocator_arg_t(), __a,
typename __make_tuple_indices<sizeof...(_Tp)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
typename __make_tuple_indices<0>::type(),
typename __make_tuple_types<tuple, 0>::type(),
__t...
) {}
template <class _Alloc, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) >= 1>,
is_copy_constructible<_Tp>...,
_Not<_Lazy<_And, is_convertible<const _Tp&, _Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
explicit tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t)
: __base_(allocator_arg_t(), __a,
typename __make_tuple_indices<sizeof...(_Tp)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
typename __make_tuple_indices<0>::type(),
typename __make_tuple_types<tuple, 0>::type(),
__t...
) {}
// tuple(U&& ...) constructors (including allocator_arg_t variants)
template <class ..._Up> struct _IsThisTuple : false_type { };
template <class _Up> struct _IsThisTuple<_Up> : is_same<__uncvref_t<_Up>, tuple> { };
template <class ..._Up>
struct _EnableUTypesCtor : _And<
_BoolConstant<sizeof...(_Tp) >= 1>,
_Not<_IsThisTuple<_Up...> >, // extension to allow mis-behaved user constructors
is_constructible<_Tp, _Up>...
> { };
template <class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableUTypesCtor<_Up...>,
is_convertible<_Up, _Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple(_Up&&... __u)
_NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value))
: __base_(typename __make_tuple_indices<sizeof...(_Up)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
_VSTD::forward<_Up>(__u)...) {}
template <class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableUTypesCtor<_Up...>,
_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit tuple(_Up&&... __u)
_NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value))
: __base_(typename __make_tuple_indices<sizeof...(_Up)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
_VSTD::forward<_Up>(__u)...) {}
template <class _Alloc, class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableUTypesCtor<_Up...>,
is_convertible<_Up, _Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u)
: __base_(allocator_arg_t(), __a,
typename __make_tuple_indices<sizeof...(_Up)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
_VSTD::forward<_Up>(__u)...) {}
template <class _Alloc, class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableUTypesCtor<_Up...>,
_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
explicit tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u)
: __base_(allocator_arg_t(), __a,
typename __make_tuple_indices<sizeof...(_Up)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
_VSTD::forward<_Up>(__u)...) {}
// Copy and move constructors (including the allocator_arg_t variants)
tuple(const tuple&) = default;
tuple(tuple&&) = default;
template <class _Alloc, template<class...> class _And = _And, __enable_if_t<
_And<is_copy_constructible<_Tp>...>::value
, int> = 0>
tuple(allocator_arg_t, const _Alloc& __alloc, const tuple& __t)
: __base_(allocator_arg_t(), __alloc, __t)
{ }
template <class _Alloc, template<class...> class _And = _And, __enable_if_t<
_And<is_move_constructible<_Tp>...>::value
, int> = 0>
tuple(allocator_arg_t, const _Alloc& __alloc, tuple&& __t)
: __base_(allocator_arg_t(), __alloc, _VSTD::move(__t))
{ }
// tuple(const tuple<U...>&) constructors (including allocator_arg_t variants)
template <class ..._Up>
struct _EnableCopyFromOtherTuple : _And<
_Not<is_same<tuple<_Tp...>, tuple<_Up...> > >,
_Lazy<_Or,
_BoolConstant<sizeof...(_Tp) != 1>,
// _Tp and _Up are 1-element packs - the pack expansions look
// weird to avoid tripping up the type traits in degenerate cases
_Lazy<_And,
_Not<is_convertible<const tuple<_Up>&, _Tp> >...,
_Not<is_constructible<_Tp, const tuple<_Up>&> >...
>
>,
is_constructible<_Tp, const _Up&>...
> { };
template <class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableCopyFromOtherTuple<_Up...>,
is_convertible<const _Up&, _Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple(const tuple<_Up...>& __t)
_NOEXCEPT_((_And<is_nothrow_constructible<_Tp, const _Up&>...>::value))
: __base_(__t)
{ }
template <class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableCopyFromOtherTuple<_Up...>,
_Not<_Lazy<_And, is_convertible<const _Up&, _Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit tuple(const tuple<_Up...>& __t)
_NOEXCEPT_((_And<is_nothrow_constructible<_Tp, const _Up&>...>::value))
: __base_(__t)
{ }
template <class ..._Up, class _Alloc, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableCopyFromOtherTuple<_Up...>,
is_convertible<const _Up&, _Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc& __a, const tuple<_Up...>& __t)
: __base_(allocator_arg_t(), __a, __t)
{ }
template <class ..._Up, class _Alloc, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableCopyFromOtherTuple<_Up...>,
_Not<_Lazy<_And, is_convertible<const _Up&, _Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
explicit tuple(allocator_arg_t, const _Alloc& __a, const tuple<_Up...>& __t)
: __base_(allocator_arg_t(), __a, __t)
{ }
// tuple(tuple<U...>&&) constructors (including allocator_arg_t variants)
template <class ..._Up>
struct _EnableMoveFromOtherTuple : _And<
_Not<is_same<tuple<_Tp...>, tuple<_Up...> > >,
_Lazy<_Or,
_BoolConstant<sizeof...(_Tp) != 1>,
// _Tp and _Up are 1-element packs - the pack expansions look
// weird to avoid tripping up the type traits in degenerate cases
_Lazy<_And,
_Not<is_convertible<tuple<_Up>, _Tp> >...,
_Not<is_constructible<_Tp, tuple<_Up> > >...
>
>,
is_constructible<_Tp, _Up>...
> { };
template <class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableMoveFromOtherTuple<_Up...>,
is_convertible<_Up, _Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple(tuple<_Up...>&& __t)
_NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value))
: __base_(_VSTD::move(__t))
{ }
template <class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableMoveFromOtherTuple<_Up...>,
_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit tuple(tuple<_Up...>&& __t)
_NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value))
: __base_(_VSTD::move(__t))
{ }
template <class _Alloc, class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableMoveFromOtherTuple<_Up...>,
is_convertible<_Up, _Tp>... // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc& __a, tuple<_Up...>&& __t)
: __base_(allocator_arg_t(), __a, _VSTD::move(__t))
{ }
template <class _Alloc, class ..._Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>,
_EnableMoveFromOtherTuple<_Up...>,
_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> > // explicit check
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
explicit tuple(allocator_arg_t, const _Alloc& __a, tuple<_Up...>&& __t)
: __base_(allocator_arg_t(), __a, _VSTD::move(__t))
{ }
// tuple(const pair<U1, U2>&) constructors (including allocator_arg_t variants)
template <class _Up1, class _Up2, class ..._DependentTp>
struct _EnableImplicitCopyFromPair : _And<
is_constructible<_FirstType<_DependentTp...>, const _Up1&>,
is_constructible<_SecondType<_DependentTp...>, const _Up2&>,
is_convertible<const _Up1&, _FirstType<_DependentTp...> >, // explicit check
is_convertible<const _Up2&, _SecondType<_DependentTp...> >
> { };
template <class _Up1, class _Up2, class ..._DependentTp>
struct _EnableExplicitCopyFromPair : _And<
is_constructible<_FirstType<_DependentTp...>, const _Up1&>,
is_constructible<_SecondType<_DependentTp...>, const _Up2&>,
_Not<is_convertible<const _Up1&, _FirstType<_DependentTp...> > >, // explicit check
_Not<is_convertible<const _Up2&, _SecondType<_DependentTp...> > >
> { };
template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == 2>,
_EnableImplicitCopyFromPair<_Up1, _Up2, _Tp...>
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple(const pair<_Up1, _Up2>& __p)
_NOEXCEPT_((_And<
is_nothrow_constructible<_FirstType<_Tp...>, const _Up1&>,
is_nothrow_constructible<_SecondType<_Tp...>, const _Up2&>
>::value))
: __base_(__p)
{ }
template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == 2>,
_EnableExplicitCopyFromPair<_Up1, _Up2, _Tp...>
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit tuple(const pair<_Up1, _Up2>& __p)
_NOEXCEPT_((_And<
is_nothrow_constructible<_FirstType<_Tp...>, const _Up1&>,
is_nothrow_constructible<_SecondType<_Tp...>, const _Up2&>
>::value))
: __base_(__p)
{ }
template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == 2>,
_EnableImplicitCopyFromPair<_Up1, _Up2, _Tp...>
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc& __a, const pair<_Up1, _Up2>& __p)
: __base_(allocator_arg_t(), __a, __p)
{ }
template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == 2>,
_EnableExplicitCopyFromPair<_Up1, _Up2, _Tp...>
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
explicit tuple(allocator_arg_t, const _Alloc& __a, const pair<_Up1, _Up2>& __p)
: __base_(allocator_arg_t(), __a, __p)
{ }
// tuple(pair<U1, U2>&&) constructors (including allocator_arg_t variants)
template <class _Up1, class _Up2, class ..._DependentTp>
struct _EnableImplicitMoveFromPair : _And<
is_constructible<_FirstType<_DependentTp...>, _Up1>,
is_constructible<_SecondType<_DependentTp...>, _Up2>,
is_convertible<_Up1, _FirstType<_DependentTp...> >, // explicit check
is_convertible<_Up2, _SecondType<_DependentTp...> >
> { };
template <class _Up1, class _Up2, class ..._DependentTp>
struct _EnableExplicitMoveFromPair : _And<
is_constructible<_FirstType<_DependentTp...>, _Up1>,
is_constructible<_SecondType<_DependentTp...>, _Up2>,
_Not<is_convertible<_Up1, _FirstType<_DependentTp...> > >, // explicit check
_Not<is_convertible<_Up2, _SecondType<_DependentTp...> > >
> { };
template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == 2>,
_EnableImplicitMoveFromPair<_Up1, _Up2, _Tp...>
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple(pair<_Up1, _Up2>&& __p)
_NOEXCEPT_((_And<
is_nothrow_constructible<_FirstType<_Tp...>, _Up1>,
is_nothrow_constructible<_SecondType<_Tp...>, _Up2>
>::value))
: __base_(_VSTD::move(__p))
{ }
template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == 2>,
_EnableExplicitMoveFromPair<_Up1, _Up2, _Tp...>
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit tuple(pair<_Up1, _Up2>&& __p)
_NOEXCEPT_((_And<
is_nothrow_constructible<_FirstType<_Tp...>, _Up1>,
is_nothrow_constructible<_SecondType<_Tp...>, _Up2>
>::value))
: __base_(_VSTD::move(__p))
{ }
template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == 2>,
_EnableImplicitMoveFromPair<_Up1, _Up2, _Tp...>
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc& __a, pair<_Up1, _Up2>&& __p)
: __base_(allocator_arg_t(), __a, _VSTD::move(__p))
{ }
template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == 2>,
_EnableExplicitMoveFromPair<_Up1, _Up2, _Tp...>
>::value
, int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
explicit tuple(allocator_arg_t, const _Alloc& __a, pair<_Up1, _Up2>&& __p)
: __base_(allocator_arg_t(), __a, _VSTD::move(__p))
{ }
// [tuple.assign]
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple& operator=(_If<_And<is_copy_assignable<_Tp>...>::value, tuple, __nat> const& __tuple)
_NOEXCEPT_((_And<is_nothrow_copy_assignable<_Tp>...>::value))
{
_VSTD::__memberwise_copy_assign(*this, __tuple,
typename __make_tuple_indices<sizeof...(_Tp)>::type());
return *this;
}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple& operator=(_If<_And<is_move_assignable<_Tp>...>::value, tuple, __nat>&& __tuple)
_NOEXCEPT_((_And<is_nothrow_move_assignable<_Tp>...>::value))
{
_VSTD::__memberwise_forward_assign(*this, _VSTD::move(__tuple),
__tuple_types<_Tp...>(),
typename __make_tuple_indices<sizeof...(_Tp)>::type());
return *this;
}
template<class... _Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == sizeof...(_Up)>,
is_assignable<_Tp&, _Up const&>...
>::value
,int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple& operator=(tuple<_Up...> const& __tuple)
_NOEXCEPT_((_And<is_nothrow_assignable<_Tp&, _Up const&>...>::value))
{
_VSTD::__memberwise_copy_assign(*this, __tuple,
typename __make_tuple_indices<sizeof...(_Tp)>::type());
return *this;
}
template<class... _Up, __enable_if_t<
_And<
_BoolConstant<sizeof...(_Tp) == sizeof...(_Up)>,
is_assignable<_Tp&, _Up>...
>::value
,int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple& operator=(tuple<_Up...>&& __tuple)
_NOEXCEPT_((_And<is_nothrow_assignable<_Tp&, _Up>...>::value))
{
_VSTD::__memberwise_forward_assign(*this, _VSTD::move(__tuple),
__tuple_types<_Up...>(),
typename __make_tuple_indices<sizeof...(_Tp)>::type());
return *this;
}
template<class _Up1, class _Up2, class _Dep = true_type, __enable_if_t<
_And<_Dep,
_BoolConstant<sizeof...(_Tp) == 2>,
is_assignable<_FirstType<_Tp..., _Dep>&, _Up1 const&>,
is_assignable<_SecondType<_Tp..., _Dep>&, _Up2 const&>
>::value
,int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple& operator=(pair<_Up1, _Up2> const& __pair)
_NOEXCEPT_((_And<
is_nothrow_assignable<_FirstType<_Tp...>&, _Up1 const&>,
is_nothrow_assignable<_SecondType<_Tp...>&, _Up2 const&>
>::value))
{
_VSTD::get<0>(*this) = __pair.first;
_VSTD::get<1>(*this) = __pair.second;
return *this;
}
template<class _Up1, class _Up2, class _Dep = true_type, __enable_if_t<
_And<_Dep,
_BoolConstant<sizeof...(_Tp) == 2>,
is_assignable<_FirstType<_Tp..., _Dep>&, _Up1>,
is_assignable<_SecondType<_Tp..., _Dep>&, _Up2>
>::value
,int> = 0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple& operator=(pair<_Up1, _Up2>&& __pair)
_NOEXCEPT_((_And<
is_nothrow_assignable<_FirstType<_Tp...>&, _Up1>,
is_nothrow_assignable<_SecondType<_Tp...>&, _Up2>
>::value))
{
_VSTD::get<0>(*this) = _VSTD::forward<_Up1>(__pair.first);
_VSTD::get<1>(*this) = _VSTD::forward<_Up2>(__pair.second);
return *this;
}
// EXTENSION
template<class _Up, size_t _Np, class = __enable_if_t<
_And<
_BoolConstant<_Np == sizeof...(_Tp)>,
is_assignable<_Tp&, _Up const&>...
>::value
> >
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple& operator=(array<_Up, _Np> const& __array)
_NOEXCEPT_((_And<is_nothrow_assignable<_Tp&, _Up const&>...>::value))
{
_VSTD::__memberwise_copy_assign(*this, __array,
typename __make_tuple_indices<sizeof...(_Tp)>::type());
return *this;
}
// EXTENSION
template<class _Up, size_t _Np, class = void, class = __enable_if_t<
_And<
_BoolConstant<_Np == sizeof...(_Tp)>,
is_assignable<_Tp&, _Up>...
>::value
> >
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple& operator=(array<_Up, _Np>&& __array)
_NOEXCEPT_((_And<is_nothrow_assignable<_Tp&, _Up>...>::value))
{
_VSTD::__memberwise_forward_assign(*this, _VSTD::move(__array),
__tuple_types<_If<true, _Up, _Tp>...>(),
typename __make_tuple_indices<sizeof...(_Tp)>::type());
return *this;
}
// [tuple.swap]
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
void swap(tuple& __t) _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value)
{__base_.swap(__t.__base_);}
};
template <>
class _LIBCPP_TEMPLATE_VIS tuple<>
{
public:
_LIBCPP_INLINE_VISIBILITY constexpr
tuple() _NOEXCEPT = default;
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc&) _NOEXCEPT {}
template <class _Alloc>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc&, const tuple&) _NOEXCEPT {}
template <class _Up>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(array<_Up, 0>) _NOEXCEPT {}
template <class _Alloc, class _Up>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
tuple(allocator_arg_t, const _Alloc&, array<_Up, 0>) _NOEXCEPT {}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
void swap(tuple&) _NOEXCEPT {}
};
#if _LIBCPP_STD_VER > 20
template <class... _TTypes, class... _UTypes, template<class> class _TQual, template<class> class _UQual>
requires requires { typename tuple<common_reference_t<_TQual<_TTypes>, _UQual<_UTypes>>...>; }
struct basic_common_reference<tuple<_TTypes...>, tuple<_UTypes...>, _TQual, _UQual> {
using type = tuple<common_reference_t<_TQual<_TTypes>, _UQual<_UTypes>>...>;
};
template <class... _TTypes, class... _UTypes>
requires requires { typename tuple<common_type_t<_TTypes, _UTypes>...>; }
struct common_type<tuple<_TTypes...>, tuple<_UTypes...>> {
using type = tuple<common_type_t<_TTypes, _UTypes>...>;
};
#endif // _LIBCPP_STD_VER > 20
#if _LIBCPP_STD_VER > 14
template <class ..._Tp>
tuple(_Tp...) -> tuple<_Tp...>;
template <class _Tp1, class _Tp2>
tuple(pair<_Tp1, _Tp2>) -> tuple<_Tp1, _Tp2>;
template <class _Alloc, class ..._Tp>
tuple(allocator_arg_t, _Alloc, _Tp...) -> tuple<_Tp...>;
template <class _Alloc, class _Tp1, class _Tp2>
tuple(allocator_arg_t, _Alloc, pair<_Tp1, _Tp2>) -> tuple<_Tp1, _Tp2>;
template <class _Alloc, class ..._Tp>
tuple(allocator_arg_t, _Alloc, tuple<_Tp...>) -> tuple<_Tp...>;
#endif
template <class ..._Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
typename enable_if
<
__all<__is_swappable<_Tp>::value...>::value,
void
>::type
swap(tuple<_Tp...>& __t, tuple<_Tp...>& __u)
_NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value)
{__t.swap(__u);}
// get
template <size_t _Ip, class ..._Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
typename tuple_element<_Ip, tuple<_Tp...> >::type&
get(tuple<_Tp...>& __t) _NOEXCEPT
{
typedef _LIBCPP_NODEBUG typename tuple_element<_Ip, tuple<_Tp...> >::type type;
return static_cast<__tuple_leaf<_Ip, type>&>(__t.__base_).get();
}
template <size_t _Ip, class ..._Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const typename tuple_element<_Ip, tuple<_Tp...> >::type&
get(const tuple<_Tp...>& __t) _NOEXCEPT
{
typedef _LIBCPP_NODEBUG typename tuple_element<_Ip, tuple<_Tp...> >::type type;
return static_cast<const __tuple_leaf<_Ip, type>&>(__t.__base_).get();
}
template <size_t _Ip, class ..._Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
typename tuple_element<_Ip, tuple<_Tp...> >::type&&
get(tuple<_Tp...>&& __t) _NOEXCEPT
{
typedef _LIBCPP_NODEBUG typename tuple_element<_Ip, tuple<_Tp...> >::type type;
return static_cast<type&&>(
static_cast<__tuple_leaf<_Ip, type>&&>(__t.__base_).get());
}
template <size_t _Ip, class ..._Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
get(const tuple<_Tp...>&& __t) _NOEXCEPT
{
typedef _LIBCPP_NODEBUG typename tuple_element<_Ip, tuple<_Tp...> >::type type;
return static_cast<const type&&>(
static_cast<const __tuple_leaf<_Ip, type>&&>(__t.__base_).get());
}
#if _LIBCPP_STD_VER > 11
namespace __find_detail {
static constexpr size_t __not_found = static_cast<size_t>(-1);
static constexpr size_t __ambiguous = __not_found - 1;
inline _LIBCPP_INLINE_VISIBILITY
constexpr size_t __find_idx_return(size_t __curr_i, size_t __res, bool __matches) {
return !__matches ? __res :
(__res == __not_found ? __curr_i : __ambiguous);
}
template <size_t _Nx>
inline _LIBCPP_INLINE_VISIBILITY
constexpr size_t __find_idx(size_t __i, const bool (&__matches)[_Nx]) {
return __i == _Nx ? __not_found :
__find_idx_return(__i, __find_idx(__i + 1, __matches), __matches[__i]);
}
template <class _T1, class ..._Args>
struct __find_exactly_one_checked {
static constexpr bool __matches[sizeof...(_Args)] = {is_same<_T1, _Args>::value...};
static constexpr size_t value = __find_detail::__find_idx(0, __matches);
static_assert(value != __not_found, "type not found in type list" );
static_assert(value != __ambiguous, "type occurs more than once in type list");
};
template <class _T1>
struct __find_exactly_one_checked<_T1> {
static_assert(!is_same<_T1, _T1>::value, "type not in empty type list");
};
} // namespace __find_detail
template <typename _T1, typename... _Args>
struct __find_exactly_one_t
: public __find_detail::__find_exactly_one_checked<_T1, _Args...> {
};
template <class _T1, class... _Args>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1& get(tuple<_Args...>& __tup) noexcept
{
return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup);
}
template <class _T1, class... _Args>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 const& get(tuple<_Args...> const& __tup) noexcept
{
return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup);
}
template <class _T1, class... _Args>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1&& get(tuple<_Args...>&& __tup) noexcept
{
return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup));
}
template <class _T1, class... _Args>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 const&& get(tuple<_Args...> const&& __tup) noexcept
{
return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup));
}
#endif
// tie
template <class ..._Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple<_Tp&...>
tie(_Tp&... __t) _NOEXCEPT
{
return tuple<_Tp&...>(__t...);
}
template <class _Up>
struct __ignore_t
{
template <class _Tp>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const __ignore_t& operator=(_Tp&&) const {return *this;}
};
namespace {
constexpr __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>();
} // namespace
template <class... _Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple<typename __unwrap_ref_decay<_Tp>::type...>
make_tuple(_Tp&&... __t)
{
return tuple<typename __unwrap_ref_decay<_Tp>::type...>(_VSTD::forward<_Tp>(__t)...);
}
template <class... _Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple<_Tp&&...>
forward_as_tuple(_Tp&&... __t) _NOEXCEPT
{
return tuple<_Tp&&...>(_VSTD::forward<_Tp>(__t)...);
}
template <size_t _Ip>
struct __tuple_equal
{
template <class _Tp, class _Up>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool operator()(const _Tp& __x, const _Up& __y)
{
return __tuple_equal<_Ip - 1>()(__x, __y) && _VSTD::get<_Ip-1>(__x) == _VSTD::get<_Ip-1>(__y);
}
};
template <>
struct __tuple_equal<0>
{
template <class _Tp, class _Up>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool operator()(const _Tp&, const _Up&)
{
return true;
}
};
template <class ..._Tp, class ..._Up>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator==(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
{
static_assert (sizeof...(_Tp) == sizeof...(_Up), "Can't compare tuples of different sizes");
return __tuple_equal<sizeof...(_Tp)>()(__x, __y);
}
#if _LIBCPP_STD_VER > 17
// operator<=>
template <class ..._Tp, class ..._Up, size_t ..._Is>
_LIBCPP_HIDE_FROM_ABI constexpr
auto
__tuple_compare_three_way(const tuple<_Tp...>& __x, const tuple<_Up...>& __y, index_sequence<_Is...>) {
common_comparison_category_t<__synth_three_way_result<_Tp, _Up>...> __result = strong_ordering::equal;
static_cast<void>(((__result = _VSTD::__synth_three_way(_VSTD::get<_Is>(__x), _VSTD::get<_Is>(__y)), __result != 0) || ...));
return __result;
}
template <class ..._Tp, class ..._Up>
requires (sizeof...(_Tp) == sizeof...(_Up))
_LIBCPP_HIDE_FROM_ABI constexpr
common_comparison_category_t<__synth_three_way_result<_Tp, _Up>...>
operator<=>(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
{
return _VSTD::__tuple_compare_three_way(__x, __y, index_sequence_for<_Tp...>{});
}
#else // _LIBCPP_STD_VER > 17
template <class ..._Tp, class ..._Up>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator!=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
{
return !(__x == __y);
}
template <size_t _Ip>
struct __tuple_less
{
template <class _Tp, class _Up>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool operator()(const _Tp& __x, const _Up& __y)
{
const size_t __idx = tuple_size<_Tp>::value - _Ip;
if (_VSTD::get<__idx>(__x) < _VSTD::get<__idx>(__y))
return true;
if (_VSTD::get<__idx>(__y) < _VSTD::get<__idx>(__x))
return false;
return __tuple_less<_Ip-1>()(__x, __y);
}
};
template <>
struct __tuple_less<0>
{
template <class _Tp, class _Up>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool operator()(const _Tp&, const _Up&)
{
return false;
}
};
template <class ..._Tp, class ..._Up>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator<(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
{
static_assert (sizeof...(_Tp) == sizeof...(_Up), "Can't compare tuples of different sizes");
return __tuple_less<sizeof...(_Tp)>()(__x, __y);
}
template <class ..._Tp, class ..._Up>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator>(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
{
return __y < __x;
}
template <class ..._Tp, class ..._Up>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator>=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
{
return !(__x < __y);
}
template <class ..._Tp, class ..._Up>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator<=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
{
return !(__y < __x);
}
#endif // _LIBCPP_STD_VER > 17
// tuple_cat
template <class _Tp, class _Up> struct __tuple_cat_type;
template <class ..._Ttypes, class ..._Utypes>
struct __tuple_cat_type<tuple<_Ttypes...>, __tuple_types<_Utypes...> >
{
typedef _LIBCPP_NODEBUG tuple<_Ttypes..., _Utypes...> type;
};
template <class _ResultTuple, bool _Is_Tuple0TupleLike, class ..._Tuples>
struct __tuple_cat_return_1
{
};
template <class ..._Types, class _Tuple0>
struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0>
{
using type _LIBCPP_NODEBUG = typename __tuple_cat_type<
tuple<_Types...>,
typename __make_tuple_types<__uncvref_t<_Tuple0> >::type
>::type;
};
template <class ..._Types, class _Tuple0, class _Tuple1, class ..._Tuples>
struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0, _Tuple1, _Tuples...>
: public __tuple_cat_return_1<
typename __tuple_cat_type<
tuple<_Types...>,
typename __make_tuple_types<__uncvref_t<_Tuple0> >::type
>::type,
__tuple_like<typename remove_reference<_Tuple1>::type>::value,
_Tuple1, _Tuples...>
{
};
template <class ..._Tuples> struct __tuple_cat_return;
template <class _Tuple0, class ..._Tuples>
struct __tuple_cat_return<_Tuple0, _Tuples...>
: public __tuple_cat_return_1<tuple<>,
__tuple_like<typename remove_reference<_Tuple0>::type>::value, _Tuple0,
_Tuples...>
{
};
template <>
struct __tuple_cat_return<>
{
typedef _LIBCPP_NODEBUG tuple<> type;
};
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
tuple<>
tuple_cat()
{
return tuple<>();
}
template <class _Rp, class _Indices, class _Tuple0, class ..._Tuples>
struct __tuple_cat_return_ref_imp;
template <class ..._Types, size_t ..._I0, class _Tuple0>
struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>, _Tuple0>
{
typedef _LIBCPP_NODEBUG typename remove_reference<_Tuple0>::type _T0;
typedef tuple<_Types..., typename __apply_cv<_Tuple0,
typename tuple_element<_I0, _T0>::type>::type&&...> type;
};
template <class ..._Types, size_t ..._I0, class _Tuple0, class _Tuple1, class ..._Tuples>
struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>,
_Tuple0, _Tuple1, _Tuples...>
: public __tuple_cat_return_ref_imp<
tuple<_Types..., typename __apply_cv<_Tuple0,
typename tuple_element<_I0,
typename remove_reference<_Tuple0>::type>::type>::type&&...>,
typename __make_tuple_indices<tuple_size<typename
remove_reference<_Tuple1>::type>::value>::type,
_Tuple1, _Tuples...>
{
};
template <class _Tuple0, class ..._Tuples>
struct __tuple_cat_return_ref
: public __tuple_cat_return_ref_imp<tuple<>,
typename __make_tuple_indices<
tuple_size<typename remove_reference<_Tuple0>::type>::value
>::type, _Tuple0, _Tuples...>
{
};
template <class _Types, class _I0, class _J0>
struct __tuple_cat;
template <class ..._Types, size_t ..._I0, size_t ..._J0>
struct __tuple_cat<tuple<_Types...>, __tuple_indices<_I0...>, __tuple_indices<_J0...> >
{
template <class _Tuple0>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&>::type
operator()(tuple<_Types...> __t, _Tuple0&& __t0)
{
(void)__t; // avoid unused parameter warning on GCC when _I0 is empty
return _VSTD::forward_as_tuple(
_VSTD::forward<_Types>(_VSTD::get<_I0>(__t))...,
_VSTD::get<_J0>(_VSTD::forward<_Tuple0>(__t0))...);
}
template <class _Tuple0, class _Tuple1, class ..._Tuples>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&, _Tuple1&&, _Tuples&&...>::type
operator()(tuple<_Types...> __t, _Tuple0&& __t0, _Tuple1&& __t1, _Tuples&& ...__tpls)
{
(void)__t; // avoid unused parameter warning on GCC when _I0 is empty
typedef _LIBCPP_NODEBUG typename remove_reference<_Tuple0>::type _T0;
typedef _LIBCPP_NODEBUG typename remove_reference<_Tuple1>::type _T1;
return __tuple_cat<
tuple<_Types...,
typename __apply_cv<_Tuple0, typename tuple_element<
_J0, _T0>::type>::type&&...>,
typename __make_tuple_indices<sizeof...(_Types) +
tuple_size<_T0>::value>::type,
typename __make_tuple_indices<tuple_size<_T1>::value>::type>()(
_VSTD::forward_as_tuple(
_VSTD::forward<_Types>(_VSTD::get<_I0>(__t))...,
_VSTD::get<_J0>(_VSTD::forward<_Tuple0>(__t0))...),
_VSTD::forward<_Tuple1>(__t1), _VSTD::forward<_Tuples>(__tpls)...);
}
};
template <class _Tuple0, class... _Tuples>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
typename __tuple_cat_return<_Tuple0, _Tuples...>::type
tuple_cat(_Tuple0&& __t0, _Tuples&&... __tpls)
{
typedef _LIBCPP_NODEBUG typename remove_reference<_Tuple0>::type _T0;
return __tuple_cat<tuple<>, __tuple_indices<>,
typename __make_tuple_indices<tuple_size<_T0>::value>::type>()
(tuple<>(), _VSTD::forward<_Tuple0>(__t0),
_VSTD::forward<_Tuples>(__tpls)...);
}
template <class ..._Tp, class _Alloc>
struct _LIBCPP_TEMPLATE_VIS uses_allocator<tuple<_Tp...>, _Alloc>
: true_type {};
template <class _T1, class _T2>
template <class... _Args1, class... _Args2, size_t ..._I1, size_t ..._I2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
pair<_T1, _T2>::pair(piecewise_construct_t,
tuple<_Args1...>& __first_args, tuple<_Args2...>& __second_args,
__tuple_indices<_I1...>, __tuple_indices<_I2...>)
: first(_VSTD::forward<_Args1>(_VSTD::get<_I1>( __first_args))...),
second(_VSTD::forward<_Args2>(_VSTD::get<_I2>(__second_args))...)
{
}
#if _LIBCPP_STD_VER > 14
template <class _Tp>
inline constexpr size_t tuple_size_v = tuple_size<_Tp>::value;
#define _LIBCPP_NOEXCEPT_RETURN(...) noexcept(noexcept(__VA_ARGS__)) { return __VA_ARGS__; }
template <class _Fn, class _Tuple, size_t ..._Id>
inline _LIBCPP_INLINE_VISIBILITY
constexpr decltype(auto) __apply_tuple_impl(_Fn && __f, _Tuple && __t,
__tuple_indices<_Id...>)
_LIBCPP_NOEXCEPT_RETURN(
_VSTD::__invoke(
_VSTD::forward<_Fn>(__f),
_VSTD::get<_Id>(_VSTD::forward<_Tuple>(__t))...)
)
template <class _Fn, class _Tuple>
inline _LIBCPP_INLINE_VISIBILITY
constexpr decltype(auto) apply(_Fn && __f, _Tuple && __t)
_LIBCPP_NOEXCEPT_RETURN(
_VSTD::__apply_tuple_impl(
_VSTD::forward<_Fn>(__f), _VSTD::forward<_Tuple>(__t),
typename __make_tuple_indices<tuple_size_v<remove_reference_t<_Tuple>>>::type{})
)
template <class _Tp, class _Tuple, size_t... _Idx>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _Tp __make_from_tuple_impl(_Tuple&& __t, __tuple_indices<_Idx...>)
_LIBCPP_NOEXCEPT_RETURN(
_Tp(_VSTD::get<_Idx>(_VSTD::forward<_Tuple>(__t))...)
)
template <class _Tp, class _Tuple>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _Tp make_from_tuple(_Tuple&& __t)
_LIBCPP_NOEXCEPT_RETURN(
_VSTD::__make_from_tuple_impl<_Tp>(_VSTD::forward<_Tuple>(__t),
typename __make_tuple_indices<tuple_size_v<remove_reference_t<_Tuple>>>::type{})
)
#undef _LIBCPP_NOEXCEPT_RETURN
#endif // _LIBCPP_STD_VER > 14
#endif // !defined(_LIBCPP_CXX03_LANG)
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_TUPLE
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