Hi, I have a abstract base class A and a set of 10 derived classes. The infix operator is overloaded in all of the derived classes

class A{
    void printNode( std::ostream& os )
    {
           this->printNode_p();
    } 

    void printNode_p( std::ostream& os )
    {
           os << (*this);
    }
};

There is a container which stores the base class pointers. I want to use boost::bind function to call the overloaded infix operator in each of its derived class. I have written like this

std::vector<A*> m_args
....
std::ostream os;
for_each( m_args.begin(), m_args.end(), bind(&A::printNode, _1, os) );

What is the problem with this code?

Thanks, Gokul.