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//===----------------------------------------------------------------------===//
//
// 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_TUPLE_ELEMENT_H
#define _LIBCPP___TUPLE_TUPLE_ELEMENT_H
#include <__config>
#include <__cstddef/size_t.h>
#include <__tuple/tuple_indices.h>
#include <__tuple/tuple_types.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
template <size_t _Ip, class _Tp>
struct tuple_element;
template <size_t _Ip, class _Tp>
struct tuple_element<_Ip, const _Tp> {
using type _LIBCPP_NODEBUG = const typename tuple_element<_Ip, _Tp>::type;
};
template <size_t _Ip, class _Tp>
struct tuple_element<_Ip, volatile _Tp> {
using type _LIBCPP_NODEBUG = volatile typename tuple_element<_Ip, _Tp>::type;
};
template <size_t _Ip, class _Tp>
struct tuple_element<_Ip, const volatile _Tp> {
using type _LIBCPP_NODEBUG = const volatile typename tuple_element<_Ip, _Tp>::type;
};
#ifndef _LIBCPP_CXX03_LANG
template <size_t _Ip, class... _Types>
struct tuple_element<_Ip, __tuple_types<_Types...> > {
static_assert(_Ip < sizeof...(_Types), "tuple_element index out of range");
using type _LIBCPP_NODEBUG = __type_pack_element<_Ip, _Types...>;
};
# if _LIBCPP_STD_VER >= 14
template <size_t _Ip, class... _Tp>
using tuple_element_t _LIBCPP_NODEBUG = typename tuple_element<_Ip, _Tp...>::type;
# endif
#endif // _LIBCPP_CXX03_LANG
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___TUPLE_TUPLE_ELEMENT_H
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