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std::is_mem...tion_pointer(3) C++ Standard Libarystd::is_mem...tion_pointer(3) NAME std::is_member_function_pointer - std::is_member_function_pointer Synopsis Defined in header <type_traits> template< class T > (since C++11) struct is_member_function_pointer; std::is_member_function_pointer is a UnaryTypeTrait. Checks whether T is a non-static member function pointer. Provides the member constant value which is equal to true, if T is a non-static member function pointer type. Otherwise, value is equal to false. If the program adds specializations for std::is_member_func- tion_pointer or std::is_member_function_pointer_v, the behavior is undefined. Template parameters T - a type to check Helper variable template template< class T > inline constexpr bool is_member_function_pointer_v = (since C++17) is_member_function_pointer<T>::value; Inherited from std::integral_constant Member constants value true if T is a member function pointer type, false other- wise [static] (public static member constant) Member functions operator bool converts the object to bool, returns value (public member function) operator() returns value (C++14) (public member function) Member types Type Definition value_type bool type std::integral_constant<bool, value> Possible implementation template<class T> struct is_member_function_pointer_helper : std::false_type {}; template<class T, class U> struct is_member_function_pointer_helper<T U::*> : std::is_func- tion<T> {}; template<class T> struct is_member_function_pointer : is_member_function_pointer_helper<typename std::re- move_cv<T>::type> {}; Example // Run this code #include <type_traits> class A { public: void member() {} }; int main() { // fails at compile time if A::member is a data member and not a function static_assert(std::is_member_function_pointer<decltype(&A::mem- ber)>::value, "A::member is not a member function."); } See also is_pointer checks if a type is a pointer type (C++11) (class template) is_member_object_pointer checks if a type is a pointer to a non-sta- tic member object (C++11) (class template) is_member_pointer checks if a type is a pointer to a non-sta- tic member (C++11) function or object (class template) http://cppreference.com 2024.06.10 std::is_mem...tion_pointer(3)
NAME | Synopsis | Template parameters | Member constants | Member functions | Member types | Possible implementation | Example | See also
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