[Boost-users] reference_wrapper

Hi All, 1) I don't understand this part of reference_wrapper: template<class T> class reference_wrapper { operator T& () const { return *t_; } }; Could someone please explain it? 2) Is there already a reference wrapper for n-ary functors which exposes the same result_type (if it exists) as the n-ary functor, but whose arguments types are arbitrary (deduced from the arguments)?