func_target.cpp

#include <functional>
#include <iostream>
#include <typeinfo>

using namespace std;

class Fuck
{
public:
  Fuck()                {}
  virtual ~Fuck()       {}
  void f()              {cout << "this is f()" << endl;}
  void s()              {cout << "this is s()" << endl;}
};


int main()
{
  Fuck *s = new Fuck();
  std::function<void (Fuck *)> f1 = &Fuck::f;
  std::function<void (Fuck *)> f2 = &Fuck::f;

  std::function<void (Fuck *)> s1 = &Fuck::s;
  std::function<void (Fuck *)> s2 = &Fuck::s;

  void (Fuck::*const *pf1)() = f1.target<void (Fuck::*)()>();
  void (Fuck::*const *pf2)() = f2.target<void (Fuck::*)()>();

  void (Fuck::*const *ps1)() = s1.target<void (Fuck::*)()>();
  void (Fuck::*const *ps2)() = s2.target<void (Fuck::*)()>();

  cout << " pf1=" <<  pf1 << endl
       << "*pf1=" << *pf1 << endl
       << " pf2=" <<  pf2 << endl
       << "*pf2=" << *pf2 << endl
       << "  eq=" << (*pf1 == &Fuck::f) << endl
       << " neq=" << (*pf1 == &Fuck::s) << endl

       << " ps1=" <<  ps1 << endl
       << "*ps1=" << *ps1 << endl
       << " ps2=" <<  ps2 << endl
       << "*ps2=" << *ps2 << endl;

  (s->**pf1)();
  return 0;
}