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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_FUNCTIONAL_H
#define _LIBCPP___TYPE_TRAITS_IS_FUNCTIONAL_H
#include <__config>
#include <__type_traits/integral_constant.h>
#include <__type_traits/is_const.h>
#include <__type_traits/is_reference.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__is_function)
template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS is_function : integral_constant<bool, __is_function(_Tp)> {};
#else
template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS is_function
: public integral_constant<bool, !(is_reference<_Tp>::value || is_const<const _Tp>::value)> {};
#endif // __has_builtin(__is_function)
#if _LIBCPP_STD_VER >= 17
template <class _Tp>
inline constexpr bool is_function_v = is_function<_Tp>::value;
#endif
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___TYPE_TRAITS_IS_FUNCTIONAL_H
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