Hi, I've got a find wrapper (returning a pointer instead of an iterator) that works for map, unordered map, ptr map, etc. I'd like to extent it to set and mult_index. What is the recommended way to disable the second overload? I didn't find a is_pair type_trait or disable_if_type. I call the find() member, which for example vector doesn't have. How should I use the free find() if a member find() isn't available? template <class T, class U> typename T::value_type::second_type* find_ptr(T& c, U v) { typename T::iterator i = c.find(v); return i == c.end() ? NULL : &i->second; } template <class T, class U> typename iterator_traits<typename T::iterator>::pointer find_ptr(T& c, U v) { typename T::iterator i = c.find(v); return i == c.end() ? NULL : &*i; } Greetings, Olaf