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std::is_member_pointer(3)      C++ Standard Libary     std::is_member_pointer(3)

NAME
     std::is_member_pointer - std::is_member_pointer

Synopsis
	Defined in header <type_traits>
	template< class T >		 (since C++11)
	struct is_member_pointer;

	std::is_member_pointer is a UnaryTypeTrait.

	If  T  is pointer to non-static member object or a pointer to non-static
     member
	function, provides the member constant value equal true. For  any  other
     type, value
	is false.

	If the program adds specializations for std::is_member_pointer or
	std::is_member_pointer_v, the behavior is undefined.

Template parameters
	T - a type to check

	Helper variable template

	template< class T >
	inline	       constexpr	bool	    is_member_pointer_v        =
     (since C++17)
	is_member_pointer<T>::value;

     Inherited from std::integral_constant

Member constants
	value	 true if T is a member pointer type, false otherwise
	[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_pointer_helper : std::false_type {};

      template<class T, class U>
      struct is_member_pointer_helper<T U::*> : std::true_type {};

      template<class T>
      struct  is_member_pointer  :  is_member_pointer_helper<typename	std::re-
     move_cv<T>::type> {};

Example
     // Run this code

      #include <type_traits>

      class C {};
      static_assert(std::is_member_pointer_v<int(C::*)>);

      static_assert(!std::is_member_pointer_v<int>);

      int main()
      {
      }

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-static
     member
	(C++11) 		   object
				   (class template)
	is_member_function_pointer checks if a type is a pointer to a non-static
     member
	(C++11) 		   function
				   (class template)

http://cppreference.com 	   2024.06.10	       std::is_member_pointer(3)
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