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_MEMBER_FUNCTION_POINTER_H
10#define _LIBCPP___TYPE_TRAITS_IS_MEMBER_FUNCTION_POINTER_H
11
12#include <__config>
13#include <__type_traits/integral_constant.h>
14#include <__type_traits/is_function.h>
15#include <__type_traits/remove_cv.h>
16#include <cstddef>
17
18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
19#  pragma GCC system_header
20#endif
21
22_LIBCPP_BEGIN_NAMESPACE_STD
23
24template <class _Tp>
25struct __libcpp_is_member_pointer {
26  enum { __is_member = false, __is_func = false, __is_obj = false };
27};
28template <class _Tp, class _Up>
29struct __libcpp_is_member_pointer<_Tp _Up::*> {
30  enum {
31    __is_member = true,
32    __is_func   = is_function<_Tp>::value,
33    __is_obj    = !__is_func,
34  };
35};
36
37#if __has_builtin(__is_member_function_pointer)
38
39template <class _Tp>
40struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer : _BoolConstant<__is_member_function_pointer(_Tp)> {};
41
42#  if _LIBCPP_STD_VER >= 17
43template <class _Tp>
44inline constexpr bool is_member_function_pointer_v = __is_member_function_pointer(_Tp);
45#  endif
46
47#else // __has_builtin(__is_member_function_pointer)
48
49template <class _Tp>
50struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer
51    : public _BoolConstant<__libcpp_is_member_pointer<__remove_cv_t<_Tp> >::__is_func> {};
52
53#  if _LIBCPP_STD_VER >= 17
54template <class _Tp>
55inline constexpr bool is_member_function_pointer_v = is_member_function_pointer<_Tp>::value;
56#  endif
57
58#endif // __has_builtin(__is_member_function_pointer)
59
60_LIBCPP_END_NAMESPACE_STD
61
62#endif // _LIBCPP___TYPE_TRAITS_IS_MEMBER_FUNCTION_POINTER_H
63