It seems to contradict the documentation found here datatypes <https://clojure.org/reference/datatypes#_deftype_and_defrecord>:
> Encapsulation of information is folly. Fields are public, use protocols/interfaces to avoid dependencies It is also not documented in the doc-string, and makes it impossible to further extend the type. No more ad-hoc polymorphism basically. So you can't do this: (deftype MutableBox [^{:volatile-mutable true} contents]) (defprotocol Container (inventory [this])) (extend-type MutableBox Container (inventory [this] (.-contents this))) -- 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.