Ok, I had assumed from this
https://groups.google.com/d/topic/clojure/KQ6AM-nxlTQ/discussion that I could Is there anything else not safe to extend? Cheers D -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en