Cyclic data structures

[durban]

At Scala by the Bay I asked @sellout if recursion schemes could be used on data structures which are not only recursive, but actually contain cycles. If you ever figure it out, please let me know. Thanks!

[boggle]

Haven't tried this route myself but there's an algebraic characterization of graphs which perhaps may be useful in this context (i.e. represent the cyclic bits of your structure as a graph and embed that in your ADT). Rewriting this may prove to be harder depending on what you try to do.

https://github.com/snowleopard/alga

[durban]

@boggle Thanks, I'll take a look.