I have since rewritten the Haskell implementation to compute fixed points on cyclic graphs without using pointers or Monads. Check it out if it interests you (

I have since rewritten the Haskell implementation to compute fixed points on cyclic graphs without using pointers or Monads. Check it out if it interests you (git repo): http://david.darais.com/git/research/der-parser-3/ http://david.darais.com/git/research/der-parser-3/