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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_IS_CONST_H
#define _LIBCPP___TYPE_TRAITS_IS_CONST_H
#include <__config>
#include <__type_traits/integral_constant.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__is_const)
template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS is_const : _BoolConstant<__is_const(_Tp)> {};
# if _LIBCPP_STD_VER >= 17
template <class _Tp>
inline constexpr bool is_const_v = __is_const(_Tp);
# endif
#else
template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS is_const : public false_type {};
template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS is_const<_Tp const> : public true_type {};
# if _LIBCPP_STD_VER >= 17
template <class _Tp>
inline constexpr bool is_const_v = is_const<_Tp>::value;
# endif
#endif // __has_builtin(__is_const)
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___TYPE_TRAITS_IS_CONST_H
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