automatically convert list of pointers to derived class to list of pointers to base class

Question

Lets say that I have a base and derived class, and a function that takes an stl vector of pointers to the base class:

class A { public: int x; };

class B :          


        

Answer 1

As @Science_Fiction said earlier, it makes more sense to have a vector that holds pointers to the basic type and insert pointers to both basic and derived types into it, but if you don't control the creation of these arrays, you can use templates:

template 
inline void foo(const vector& v)
{
    for (vector::const_iterator it = v.begin(); it < v.end(); ++it)
    {
        A* a = (A*) *it;
        cout << a->x << endl;
    }
}