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