I love Functors

//Don't keep writing list loops, use functors!
class Base
{
public:
   virtual ~Base(){};
   typedef std::list List;
   struct Functor
   {
       virtual ~Functor(){}
       virtual void operator()(Base& o) const=0;
   };
   static void Functorator(List& l, const Functor& f)
   {
       for (List::iterator it=l.begin();
            it!=l.end(); ++it)
       {
           f(*(*it));
       }
   }
};