Fiberglass flowers

Did you ever think, what happens if you take a member pointer to a virtual function of a class, and then call it on another instance of derived class (that overrides that member)?

What if you do the same for nonvirtual function?

Here’s a test:

#include <iostream>

class A
{
  public:
  virtual void f() { std::cout << “A::f()\n”; };
  void g() { std::cout << “A::g()\n”; };
};

class B : public A
{
  public:
  virtual void f() { std::cout << “B::f()\n”; };
  void g() { std::cout << “B::g()\n”; };
};

typedef void (A::*VirtualFunctionPointer) ();

int main()
{
  A a;
  B b;
  B* pb = &b;

  VirtualFunctionPointer p = &A::f;
  (pb->*p) ();

  p = &A::g;
  (pb->*p) ();
  return 0;
}

Answer is in comments.