Header <boost/icl/iterator.hpp>

namespace boost {
  namespace icl {
    template<typename ContainerT> class add_iterator;
    template<typename ContainerT> class insert_iterator;
    template<typename ContainerT, typename IteratorT> 
      add_iterator< ContainerT > adder(ContainerT &, IteratorT);
    template<typename ContainerT, typename IteratorT> 
      insert_iterator< ContainerT > inserter(ContainerT &, IteratorT);
  }
}