On Tue, Aug 13, 2002 at 12:12:45PM -0400, Oleg wrote: > type 'a dlist = {mutable prev : 'a dlist option; > mutable next : 'a dlist option; > info : 'a} > Maybe I'll write it in the next few days. What kind of bothers me is the need > to have iterators (a la STL) as helper types. Unless you need thread-safe behavior, that could be just "'a dlist ref". I tried to do some fast things. See attachment. That's just an idea. Max.