#include<type_traits>

template< class T >
struct is_member_object_pointer

std::is_member_function_pointer<T>::value

// C++ program to illustrate
// std::is_member_object_pointer
#include <bits/stdc++.h>
#include <type_traits>
using namespace std;
  
// Declare a structure
class GFG {
  
public:
    int gfg;
};
  
class A {
};
  
// Driver Code
int main()
{
  
    // Object to class GFG
    int GFG::*pt = &GFG::gfg;
    cout << boolalpha;
  
    // Check if GFG* is a member object
    // pointer or not
    cout << "GFG*: "
         << is_member_object_pointer<GFG*>::value
         << endl;
  
    // Check if int GFG::* is a member
    // object pointer or not
    cout << "int GFG::*  "
         << is_member_object_pointer<int GFG::*>::value
         << endl;
  
    // Check if int A::* is a member
    // object pointer or not
    cout << "int A::*  "
         << is_member_object_pointer<int A::*>::value
         << endl;
  
    // Check if int A::*() is a member
    // object pointer or not
    cout << "int A::*()  "
         << is_member_object_pointer<int (A::*)()>::value
         << endl;
  
    return 0;
}

GFG*: false
int GFG::*  true
int A::*  true
int A::*()  false