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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___TYPE_TRAITS_ALIGNED_UNION_H
#define _LIBCPP___TYPE_TRAITS_ALIGNED_UNION_H
#include <__config>
#include <__type_traits/aligned_storage.h>
#include <__type_traits/integral_constant.h>
#include <cstddef>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
template <size_t _I0, size_t... _In>
struct __static_max;
template <size_t _I0>
struct __static_max<_I0> {
static const size_t value = _I0;
};
template <size_t _I0, size_t _I1, size_t... _In>
struct __static_max<_I0, _I1, _In...> {
static const size_t value = _I0 >= _I1 ? __static_max<_I0, _In...>::value : __static_max<_I1, _In...>::value;
};
template <size_t _Len, class _Type0, class... _Types>
struct _LIBCPP_DEPRECATED_IN_CXX23 aligned_union {
static const size_t alignment_value =
__static_max<_LIBCPP_PREFERRED_ALIGNOF(_Type0), _LIBCPP_PREFERRED_ALIGNOF(_Types)...>::value;
static const size_t __len = __static_max<_Len, sizeof(_Type0), sizeof(_Types)...>::value;
typedef typename aligned_storage<__len, alignment_value>::type type;
};
#if _LIBCPP_STD_VER >= 14
template <size_t _Len, class... _Types>
using aligned_union_t _LIBCPP_DEPRECATED_IN_CXX23 = typename aligned_union<_Len, _Types...>::type;
#endif
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___TYPE_TRAITS_ALIGNED_UNION_H
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