In the following example is there a more efficient way to retrieve the unique keys of a non-unique index?

typedef multi_index_container<

  TaggedNodeEntry,

  indexed_by<

    hashed_non_unique<

      tag<name>,

      BOOST_MULTI_INDEX_MEMBER(TaggedNodeEntry, int, name)

    >,

...  >

> TaggedNodes;

int main() { ...

  boost::multi_index::index<TaggedNodes, name>::type::iterator ic0 = get<name>(taggedNodes).begin();

  boost::multi_index::index<TaggedNodes, name>::type::iterator ic1 = get<name>(taggedNodes).end();

  while (ic0 != ic1) {

    std::cout << ic0->name << std::endl;

    ic0 = get<name>(taggedNodes).equal_range(ic0->name).second;

  }