Hi all, I'm looking for code that does what boost::function_types::parameter_types does but for functors. Support for things such as boost::bind/lambda/function/signals(1&2)/etc and the standard binders and adaptors would be nice. I specifically want to be able to do something like: template<typename Functor> void f(const Functor &f) { typedef typename functor_params<Functor>::type params; // an mpl sequence const std::size_t arity = functor_arity<Functor>::value; // ... } I started writing code for this but I've come to the point where I can't see a way to support libraries such as boost::bind without relying on their implementation details. But perhaps something like this already exists? Thanks, Edd