[Boost-users] [result_of]

Hi All, I've noticed that if do, class A: F{ template<typename S> struct result{}; template struct result{ typedef ... type; }; }; result_of::type tries to deduce the result type from F (not accessible because private), so I'm left with having to keep F in a variable: class A{ // ... private: F f; }; Any suggestion for keeping F as a private base?