Hello! I have a problem with g++ 3.2.3 which has a bug for SFINAE. In my code I am trying to find out if some certain message handler is implemented or not (I know that I could do it via virtual function, but I would like to try doing it first without). The solution for that kind of meta-program is well known and can be represented as the following class: template<class ResultT, class ClassT, class ParamT> struct can_handle_message { template<ResultT (ClassT::*)(ParamT&)> struct wrapper; template<typename U> static char(&test(U*, wrapper<&U::handleMessage>* w=0))[1]; static char(&test(...))[2]; typedef boost::mpl::bool_<1==sizeof(test(static_cast<ClassT*>(NULL)))> result; }; g++ 3.4.3 compiles it fine, but g++ 3.2.3 fails. Somewhere in the newsgroups I read that g++ 3.2.3 needs a complete type as workaround to compile. Since the function I am looking for is parameterized I can not provide a complete type. Is there any boost analog which can help me in any way? Many thanks! With Kind Regards, Ovanes Markarian