For greater clarity, I've cleaned up the code and broken it into 2 files, record-play0 and record-play:
(ns aatree.record-play0) (set! *warn-on-reflection* true) (defrecord base []) (defn new-base [opts] (-> (->base) (into opts) (assoc :blap (fn [this] 42)))) (defrecord wackel []) (defn new-wackel [opts] (-> (->wackel) (into opts) (assoc :blip (fn [this x y z] (+ x y z))))) --- (ns aatree.record-play (:require [aatree.record-play0 :refer :all])) (set! *warn-on-reflection* true) (defprotocol gran (blip [this x y z]) (blap [this])) (def w (-> {} new-base new-wackel)) (extend-type aatree.record_play0.wackel gran (blip [this x y z] ((:blip this) this x y z)) (blap [this] ((:blap this) this))) (def w (-> {} new-base new-wackel)) (println (blip w 1 2 3)) ; -> 6 (println (blap w)) ; -> 42 -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.