Achtung! The CPS variant is written in, of all things, continuation passing style, which is hard on the eyes. It is thus expected to be much harder to read than the straightforward treeparse.
Achtung! In a single Arc session, it is safe to use only treeparse or cps_treeparse. Never load both in the same session.
Achtung! Some of treeparse's features are not supported by cps_treeparse.
