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 
24 template <class _Tp> struct __libcpp_is_member_pointer {
25   enum {
26     __is_member = false,
27     __is_func = false,
28     __is_obj = false
29   };
30 };
31 template <class _Tp, class _Up> struct __libcpp_is_member_pointer<_Tp _Up::*> {
32   enum {
33     __is_member = true,
34     __is_func = is_function<_Tp>::value,
35     __is_obj = !__is_func,
36   };
37 };
38 
39 #if __has_builtin(__is_member_function_pointer)
40 
41 template<class _Tp>
42 struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer
43     : _BoolConstant<__is_member_function_pointer(_Tp)> { };
44 
45 #if _LIBCPP_STD_VER > 14
46 template <class _Tp>
47 inline constexpr bool is_member_function_pointer_v = __is_member_function_pointer(_Tp);
48 #endif
49 
50 #else // __has_builtin(__is_member_function_pointer)
51 
52 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer
53     : public _BoolConstant< __libcpp_is_member_pointer<typename remove_cv<_Tp>::type>::__is_func > {};
54 
55 #if _LIBCPP_STD_VER > 14
56 template <class _Tp>
57 inline constexpr bool is_member_function_pointer_v = is_member_function_pointer<_Tp>::value;
58 #endif
59 
60 #endif // __has_builtin(__is_member_function_pointer)
61 
62 _LIBCPP_END_NAMESPACE_STD
63 
64 #endif // _LIBCPP___TYPE_TRAITS_IS_MEMBER_FUNCTION_POINTER_H
65