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Diffstat (limited to 'include/c++/v1/tuple')
| -rw-r--r-- | include/c++/v1/tuple | 1100 |
1 files changed, 1100 insertions, 0 deletions
diff --git a/include/c++/v1/tuple b/include/c++/v1/tuple new file mode 100644 index 0000000..e98ae72 --- /dev/null +++ b/include/c++/v1/tuple @@ -0,0 +1,1100 @@ +// -*- C++ -*- +//===--------------------------- tuple ------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef _LIBCPP_TUPLE +#define _LIBCPP_TUPLE + +/* + tuple synopsis + +namespace std +{ + +template <class... T> +class tuple { +public: + constexpr tuple(); + explicit tuple(const T&...); // constexpr in C++14 + template <class... U> + explicit tuple(U&&...); // constexpr in C++14 + tuple(const tuple&) = default; + tuple(tuple&&) = default; + template <class... U> + tuple(const tuple<U...>&); // constexpr in C++14 + template <class... U> + tuple(tuple<U...>&&); // constexpr in C++14 + template <class U1, class U2> + tuple(const pair<U1, U2>&); // iff sizeof...(T) == 2 // constexpr in C++14 + template <class U1, class U2> + 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> + tuple(allocator_arg_t, const Alloc& a, const T&...); + template <class Alloc, class... U> + tuple(allocator_arg_t, const Alloc& a, U&&...); + template <class Alloc> + tuple(allocator_arg_t, const Alloc& a, const tuple&); + template <class Alloc> + tuple(allocator_arg_t, const Alloc& a, tuple&&); + template <class Alloc, class... U> + tuple(allocator_arg_t, const Alloc& a, const tuple<U...>&); + template <class Alloc, class... U> + tuple(allocator_arg_t, const Alloc& a, tuple<U...>&&); + template <class Alloc, class U1, class U2> + tuple(allocator_arg_t, const Alloc& a, const pair<U1, U2>&); + template <class Alloc, class U1, class U2> + tuple(allocator_arg_t, const Alloc& a, pair<U1, U2>&&); + + tuple& operator=(const tuple&); + tuple& + operator=(tuple&&) noexcept(AND(is_nothrow_move_assignable<T>::value ...)); + template <class... U> + tuple& operator=(const tuple<U...>&); + template <class... U> + tuple& operator=(tuple<U...>&&); + template <class U1, class U2> + tuple& operator=(const pair<U1, U2>&); // iff sizeof...(T) == 2 + template <class U1, class U2> + tuple& operator=(pair<U1, U2>&&); //iffsizeof...(T) == 2 + + void swap(tuple&) noexcept(AND(swap(declval<T&>(), declval<T&>())...)); +}; + +const 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 + +// 20.4.1.4, tuple helper classes: +template <class T> class tuple_size; // undefined +template <class... T> class tuple_size<tuple<T...>>; +template <intsize_t I, class T> class tuple_element; // undefined +template <intsize_t I, class... T> class tuple_element<I, tuple<T...>>; +template <size_t _Ip, class ..._Tp> + using tuple_element_t = typename tuple_element <_Ip, _Tp...>::type; // C++14 + +// 20.4.1.5, element access: +template <intsize_t I, class... T> + typename tuple_element<I, tuple<T...>>::type& + get(tuple<T...>&) noexcept; // constexpr in C++14 +template <intsize_t I, class... T> + typename const tuple_element<I, tuple<T...>>::type & + get(const tuple<T...>&) noexcept; // constexpr in C++14 +template <intsize_t I, class... T> + typename tuple_element<I, tuple<T...>>::type&& + get(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 T1 const& get(const tuple<T...>&) noexcept; // C++14 +template <class T1, class... T> + constexpr T1&& get(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 +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 +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 + +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 <__config> +#include <__tuple> +#include <cstddef> +#include <type_traits> +#include <__functional_base> +#include <utility> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +#pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +#ifndef _LIBCPP_HAS_NO_VARIADICS + +// tuple_size + +template <class ..._Tp> +class _LIBCPP_TYPE_VIS_ONLY tuple_size<tuple<_Tp...> > + : public integral_constant<size_t, sizeof...(_Tp)> +{ +}; + +// tuple_element + +template <size_t _Ip, class ..._Tp> +class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, tuple<_Tp...> > +{ +public: + typedef typename tuple_element<_Ip, __tuple_types<_Tp...> >::type type; +}; + +#if _LIBCPP_STD_VER > 11 +template <size_t _Ip, class ..._Tp> +using tuple_element_t = typename tuple_element <_Ip, _Tp...>::type; +#endif + +// __tuple_leaf + +template <size_t _Ip, class _Hp, bool=is_empty<_Hp>::value +#if __has_feature(is_final) + && !__is_final(_Hp) +#endif + > +class __tuple_leaf; + +template <size_t _Ip, class _Hp, bool _Ep> +inline _LIBCPP_INLINE_VISIBILITY +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; + + __tuple_leaf& operator=(const __tuple_leaf&); +public: + _LIBCPP_INLINE_VISIBILITY _LIBCPP_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 + __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 + __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 + __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 = typename enable_if<is_constructible<_Hp, _Tp>::value>::type> + _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(!is_reference<_Hp>::value || + (is_lvalue_reference<_Hp>::value && + (is_lvalue_reference<_Tp>::value || + is_same<typename remove_reference<_Tp>::type, + reference_wrapper< + typename remove_reference<_Hp>::type + > + >::value)) || + (is_rvalue_reference<_Hp>::value && + !is_lvalue_reference<_Tp>::value), + "Attempted to construct a reference element in a tuple with an rvalue");} + + template <class _Tp, class _Alloc> + _LIBCPP_INLINE_VISIBILITY + explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t) + : value(_VSTD::forward<_Tp>(__t)) + {static_assert(!is_lvalue_reference<_Hp>::value || + (is_lvalue_reference<_Hp>::value && + (is_lvalue_reference<_Tp>::value || + is_same<typename remove_reference<_Tp>::type, + reference_wrapper< + typename remove_reference<_Hp>::type + > + >::value)), + "Attempted to construct a reference element in a tuple with an rvalue");} + + template <class _Tp, class _Alloc> + _LIBCPP_INLINE_VISIBILITY + explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t) + : value(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t)) + {static_assert(!is_lvalue_reference<_Hp>::value || + (is_lvalue_reference<_Hp>::value && + (is_lvalue_reference<_Tp>::value || + is_same<typename remove_reference<_Tp>::type, + reference_wrapper< + typename remove_reference<_Hp>::type + > + >::value)), + "Attempted to construct a reference element in a tuple with an rvalue");} + + template <class _Tp, class _Alloc> + _LIBCPP_INLINE_VISIBILITY + explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t) + : value(_VSTD::forward<_Tp>(__t), __a) + {static_assert(!is_lvalue_reference<_Hp>::value || + (is_lvalue_reference<_Hp>::value && + (is_lvalue_reference<_Tp>::value || + is_same<typename remove_reference<_Tp>::type, + reference_wrapper< + typename remove_reference<_Hp>::type + > + >::value)), + "Attempted to construct a reference element in a tuple with an rvalue");} + + __tuple_leaf(const __tuple_leaf& __t) = default; + __tuple_leaf(__tuple_leaf&& __t) = default; + + template <class _Tp> + _LIBCPP_INLINE_VISIBILITY + __tuple_leaf& + operator=(_Tp&& __t) _NOEXCEPT_((is_nothrow_assignable<_Hp&, _Tp>::value)) + { + value = _VSTD::forward<_Tp>(__t); + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + 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 +{ + + __tuple_leaf& operator=(const __tuple_leaf&); +public: + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf() + _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) {} + + template <class _Alloc> + _LIBCPP_INLINE_VISIBILITY + __tuple_leaf(integral_constant<int, 0>, const _Alloc&) {} + + template <class _Alloc> + _LIBCPP_INLINE_VISIBILITY + __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a) + : _Hp(allocator_arg_t(), __a) {} + + template <class _Alloc> + _LIBCPP_INLINE_VISIBILITY + __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a) + : _Hp(__a) {} + + template <class _Tp, + class = typename enable_if<is_constructible<_Hp, _Tp>::value>::type> + _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 + explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t) + : _Hp(_VSTD::forward<_Tp>(__t)) {} + + template <class _Tp, class _Alloc> + _LIBCPP_INLINE_VISIBILITY + 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 + explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t) + : _Hp(_VSTD::forward<_Tp>(__t), __a) {} + + template <class _Tp> + _LIBCPP_INLINE_VISIBILITY + __tuple_leaf& + operator=(_Tp&& __t) _NOEXCEPT_((is_nothrow_assignable<_Hp&, _Tp>::value)) + { + _Hp::operator=(_VSTD::forward<_Tp>(__t)); + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + 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 +void __swallow(_Tp&&...) _NOEXCEPT {} + +template <bool ...> struct __all; + +template <> +struct __all<> +{ + static const bool value = true; +}; + +template <bool _B0, bool ... _Bp> +struct __all<_B0, _Bp...> +{ + static const bool value = _B0 && __all<_Bp...>::value; +}; + +// __tuple_impl + +template<class _Indx, class ..._Tp> struct __tuple_impl; + +template<size_t ..._Indx, class ..._Tp> +struct __tuple_impl<__tuple_indices<_Indx...>, _Tp...> + : public __tuple_leaf<_Indx, _Tp>... +{ + _LIBCPP_INLINE_VISIBILITY + _LIBCPP_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 + 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_convertible<_Tuple, tuple<_Tp...> >::value + >::type + > + _LIBCPP_INLINE_VISIBILITY + __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)))... + {} + + template <class _Tuple> + _LIBCPP_INLINE_VISIBILITY + typename enable_if + < + __tuple_assignable<_Tuple, tuple<_Tp...> >::value, + __tuple_impl& + >::type + operator=(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_assignable<_Tp&, typename tuple_element<_Indx, + typename __make_tuple_types<_Tuple>::type>::type>::value...>::value)) + { + __swallow(__tuple_leaf<_Indx, _Tp>::operator=(_VSTD::forward<typename tuple_element<_Indx, + typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))...); + return *this; + } + + __tuple_impl(const __tuple_impl&) = default; + __tuple_impl(__tuple_impl&&) = default; + + _LIBCPP_INLINE_VISIBILITY + __tuple_impl& + operator=(const __tuple_impl& __t) _NOEXCEPT_((__all<is_nothrow_copy_assignable<_Tp>::value...>::value)) + { + __swallow(__tuple_leaf<_Indx, _Tp>::operator=(static_cast<const __tuple_leaf<_Indx, _Tp>&>(__t).get())...); + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + __tuple_impl& + operator=(__tuple_impl&& __t) _NOEXCEPT_((__all<is_nothrow_move_assignable<_Tp>::value...>::value)) + { + __swallow(__tuple_leaf<_Indx, _Tp>::operator=(_VSTD::forward<_Tp>(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t).get()))...); + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + void swap(__tuple_impl& __t) + _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) + { + __swallow(__tuple_leaf<_Indx, _Tp>::swap(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t))...); + } +}; + +template <class ..._Tp> +class _LIBCPP_TYPE_VIS_ONLY tuple +{ + typedef __tuple_impl<typename __make_tuple_indices<sizeof...(_Tp)>::type, _Tp...> base; + + base 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; +public: + + _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR tuple() + _NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {} + + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + explicit tuple(const _Tp& ... __t) _NOEXCEPT_((__all<is_nothrow_copy_constructible<_Tp>::value...>::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> + _LIBCPP_INLINE_VISIBILITY + 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 ..._Up, + typename enable_if + < + sizeof...(_Up) <= sizeof...(_Tp) && + __tuple_convertible + < + tuple<_Up...>, + typename __make_tuple_types<tuple, + sizeof...(_Up) < sizeof...(_Tp) ? + sizeof...(_Up) : + sizeof...(_Tp)>::type + >::value, + bool + >::type = false + > + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + tuple(_Up&&... __u) + _NOEXCEPT_(( + is_nothrow_constructible< + 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, + _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, + typename enable_if + < + sizeof...(_Up) <= sizeof...(_Tp) && + __tuple_constructible + < + tuple<_Up...>, + typename __make_tuple_types<tuple, + sizeof...(_Up) < sizeof...(_Tp) ? + sizeof...(_Up) : + sizeof...(_Tp)>::type + >::value && + !__tuple_convertible + < + tuple<_Up...>, + typename __make_tuple_types<tuple, + sizeof...(_Up) < sizeof...(_Tp) ? + sizeof...(_Up) : + sizeof...(_Tp)>::type + >::value, + bool + >::type =false + > + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + explicit + tuple(_Up&&... __u) + _NOEXCEPT_(( + is_nothrow_constructible< + 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, + _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, + class = typename enable_if + < + sizeof...(_Up) <= sizeof...(_Tp) && + __tuple_convertible + < + tuple<_Up...>, + typename __make_tuple_types<tuple, + sizeof...(_Up) < sizeof...(_Tp) ? + sizeof...(_Up) : + sizeof...(_Tp)>::type + >::value + >::type + > + _LIBCPP_INLINE_VISIBILITY + 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 _Tuple, + typename enable_if + < + __tuple_convertible<_Tuple, tuple>::value, + bool + >::type = false + > + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + tuple(_Tuple&& __t) _NOEXCEPT_((is_nothrow_constructible<base, _Tuple>::value)) + : base_(_VSTD::forward<_Tuple>(__t)) {} + + template <class _Tuple, + typename enable_if + < + __tuple_constructible<_Tuple, tuple>::value && + !__tuple_convertible<_Tuple, tuple>::value, + bool + >::type = false + > + _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 + explicit + tuple(_Tuple&& __t) _NOEXCEPT_((is_nothrow_constructible<base, _Tuple>::value)) + : base_(_VSTD::forward<_Tuple>(__t)) {} + + template <class _Alloc, class _Tuple, + class = typename enable_if + < + __tuple_convertible<_Tuple, tuple>::value + >::type + > + _LIBCPP_INLINE_VISIBILITY + tuple(allocator_arg_t, const _Alloc& __a, _Tuple&& __t) + : base_(allocator_arg_t(), __a, _VSTD::forward<_Tuple>(__t)) {} + + template <class _Tuple, + class = typename enable_if + < + __tuple_assignable<_Tuple, tuple>::value + >::type + > + _LIBCPP_INLINE_VISIBILITY + tuple& + operator=(_Tuple&& __t) _NOEXCEPT_((is_nothrow_assignable<base&, _Tuple>::value)) + { + base_.operator=(_VSTD::forward<_Tuple>(__t)); + return *this; + } + + _LIBCPP_INLINE_VISIBILITY + void swap(tuple& __t) _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) + {base_.swap(__t.base_);} +}; + +template <> +class _LIBCPP_TYPE_VIS_ONLY tuple<> +{ +public: + _LIBCPP_INLINE_VISIBILITY + _LIBCPP_CONSTEXPR tuple() _NOEXCEPT {} + template <class _Alloc> + _LIBCPP_INLINE_VISIBILITY + tuple(allocator_arg_t, const _Alloc&) _NOEXCEPT {} + template <class _Alloc> + _LIBCPP_INLINE_VISIBILITY + tuple(allocator_arg_t, const _Alloc&, const tuple&) _NOEXCEPT {} + template <class _Up> + _LIBCPP_INLINE_VISIBILITY + tuple(array<_Up, 0>) _NOEXCEPT {} + template <class _Alloc, class _Up> + _LIBCPP_INLINE_VISIBILITY + tuple(allocator_arg_t, const _Alloc&, array<_Up, 0>) _NOEXCEPT {} + _LIBCPP_INLINE_VISIBILITY + void swap(tuple&) _NOEXCEPT {} +}; + +template <class ..._Tp> +inline _LIBCPP_INLINE_VISIBILITY +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 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 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 typename tuple_element<_Ip, tuple<_Tp...> >::type type; + return static_cast<type&&>( + static_cast<__tuple_leaf<_Ip, type>&&>(__t.base_).get()); +} + +#if _LIBCPP_STD_VER > 11 +// get by type +template <typename _T1, size_t _Idx, typename... _Args> +struct __find_exactly_one_t_helper; + +// -- find exactly one +template <typename _T1, size_t _Idx, typename... _Args> +struct __find_exactly_one_t_checker { + static constexpr size_t value = _Idx; +// Check the rest of the list to make sure there's only one + static_assert ( __find_exactly_one_t_helper<_T1, 0, _Args...>::value == -1, "type can only occur once in type list" ); + }; + + +template <typename _T1, size_t _Idx> +struct __find_exactly_one_t_helper <_T1, _Idx> { + static constexpr size_t value = -1; + }; + +template <typename _T1, size_t _Idx, typename _Head, typename... _Args> +struct __find_exactly_one_t_helper <_T1, _Idx, _Head, _Args...> { + static constexpr size_t value = + std::conditional< + std::is_same<_T1, _Head>::value, + __find_exactly_one_t_checker<_T1, _Idx, _Args...>, + __find_exactly_one_t_helper <_T1, _Idx+1, _Args...> + >::type::value; + }; + +template <typename _T1, typename... _Args> +struct __find_exactly_one_t { + static constexpr size_t value = __find_exactly_one_t_helper<_T1, 0, _Args...>::value; + static_assert ( value != -1, "type not found in type list" ); + }; + +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)); +} + +#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 + const __ignore_t& operator=(_Tp&&) const {return *this;} +}; + +namespace { const __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>(); } + +template <class _Tp> class _LIBCPP_TYPE_VIS_ONLY reference_wrapper; + +template <class _Tp> +struct __make_tuple_return_impl +{ + typedef _Tp type; +}; + +template <class _Tp> +struct __make_tuple_return_impl<reference_wrapper<_Tp> > +{ + typedef _Tp& type; +}; + +template <class _Tp> +struct __make_tuple_return +{ + typedef typename __make_tuple_return_impl<typename decay<_Tp>::type>::type type; +}; + +template <class... _Tp> +inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 +tuple<typename __make_tuple_return<_Tp>::type...> +make_tuple(_Tp&&... __t) +{ + return tuple<typename __make_tuple_return<_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) +{ + return __tuple_equal<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 !(__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) + { + return __tuple_less<_Ip-1>()(__x, __y) || + (!__tuple_less<_Ip-1>()(__y, __x) && _VSTD::get<_Ip-1>(__x) < _VSTD::get<_Ip-1>(__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) +{ + 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); +} + +// 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 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> +{ + typedef typename __tuple_cat_type<tuple<_Types...>, + typename __make_tuple_types<typename remove_reference<_Tuple0>::type>::type>::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<typename remove_reference<_Tuple0>::type>::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 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 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) + { + return 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) + { + typedef typename remove_reference<_Tuple0>::type _T0; + typedef 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>() + (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 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_TYPE_VIS_ONLY 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 +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))...) +{ +} + +#endif // _LIBCPP_HAS_NO_VARIADICS + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP_TUPLE |