/begin_impl.hpp/1.1/Mon Mar 19 21:03:34 2007//
/deref_impl.hpp/1.1/Mon Mar 19 21:03:34 2007//
/end_impl.hpp/1.1/Mon Mar 19 21:03:34 2007//
/next_impl.hpp/1.1/Mon Mar 19 21:03:34 2007//
/value_of_impl.hpp/1.1/Mon Mar 19 21:03:34 2007//
D
