Check http://www.boost.org/doc/libs/1_53_0/libs/multi_index/doc/reference/multi_index_container.html#multi_index_container. If the first index type you introduced by indexed_by instantuation is hashed_index, you will not have rbegin() function since hashed_index does not provide one. Otherwise, tc.rbegin() call will do the same as tc.get<0>().rbegin().

I may be wrong (please correct me if it is), but I hope this will help.