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> 25 struct __libcpp_is_member_pointer { 26 enum { __is_member = false, __is_func = false, __is_obj = false }; 27 }; 28 template <class _Tp, class _Up> 29 struct __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 39 template <class _Tp> 40 struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer : _BoolConstant<__is_member_function_pointer(_Tp)> {}; 41 42 # if _LIBCPP_STD_VER >= 17 43 template <class _Tp> 44 inline constexpr bool is_member_function_pointer_v = __is_member_function_pointer(_Tp); 45 # endif 46 47 #else // __has_builtin(__is_member_function_pointer) 48 49 template <class _Tp> 50 struct _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 54 template <class _Tp> 55 inline 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