Just in case anyone forgets this is from 1994(it's in the title!). Typical modern C++ has been using this pattern for quite a while (boost::function / boost::bind) and it is now even part of the standard (std::function / std::bind). So don't go implementing Functor0->Functor9 yourself!

It is always nice though to see how C++ has grown after so many years and clearly still has staying power for even new projects.