Does a pointer to a virtual function still get invoked virtually?

Question

Will a function pointer to a class member function which is declared virtual be valid?

class A {
public:
    virtual void function(int param){ ... };
}

class B : public A {
    virtual void function(int param){ ... }; 
}

//impl :
B b;
A* a = (A*)&b;

typedef void (A::*FP)(int param);
FP funcPtr = &A::function;
(a->*(funcPtr))(1234);

Will B::function be called?

Answer 1

Yes. Valid code to test on codepad or ideone :

class A { 
public: 
    virtual void function(int param){
      printf("A:function\n");
    }; 
};

class B : public A { 
public:
    virtual void function(int param){
      printf("B:function\n");
    };  
}; 

typedef void (A::*FP)(int param);

int main(void)
{
  //impl : 
  B b; 
  A* a = (A*)&b; 

  FP funcPtr = &A::function; 
  (a->*(funcPtr))(1234);
}

Answer 2

Yes. It also works with virtual inheritance.