1//===----------------------------------------------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8 9#ifndef _LIBCPP___TYPE_TRAITS_IS_FUNCTIONAL_H 10#define _LIBCPP___TYPE_TRAITS_IS_FUNCTIONAL_H 11 12#include <__config> 13#include <__type_traits/integral_constant.h> 14#include <__type_traits/is_const.h> 15#include <__type_traits/is_reference.h> 16 17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18# pragma GCC system_header 19#endif 20 21_LIBCPP_BEGIN_NAMESPACE_STD 22 23#if __has_builtin(__is_function) 24 25template <class _Tp> 26struct _LIBCPP_TEMPLATE_VIS is_function : integral_constant<bool, __is_function(_Tp)> {}; 27 28#else 29 30template <class _Tp> 31struct _LIBCPP_TEMPLATE_VIS is_function 32 : public integral_constant<bool, !(is_reference<_Tp>::value || is_const<const _Tp>::value)> {}; 33 34#endif // __has_builtin(__is_function) 35 36#if _LIBCPP_STD_VER > 14 37template <class _Tp> 38inline constexpr bool is_function_v = is_function<_Tp>::value; 39#endif 40 41_LIBCPP_END_NAMESPACE_STD 42 43#endif // _LIBCPP___TYPE_TRAITS_IS_FUNCTIONAL_H 44