This library is deprecated. You’re free to fork it as per the CPL, but don’t use it for production. For general-purpose parsing in Clojure, use an alternative, living library such as: clojure.spec by Rich Hickey et al. Instaparse by Mark Engelberg pex by Ghadi Shayban sequex by Jonathan Claggett squarepeg by Eric Normand Long ago, while Clojure was still young, I wrote FnParse as an exercise in mo