On 12 July 2010 10:44, Nicolas Oury <nicolas.o...@gmail.com> wrote: > Is it what it is supposed to do?
I think so. The reason why this happens is that the Var backing the protocol holds an immutable map, which extend modifies with alter-var-root; the copy has the old version. You're able to add an implementation of the protocol through the copy, because a "protocol descriptor" map holds a reference to the protocol-backing Var; that is always the same Var object, even if the value behind it changes, so this part of the copy never becomes invalidated. I also think that this is an implementation detail which shouldn't be relied upon... A protocol defined in a namespace is, to me, a sort of a permanent fixture in said namespace, so this doesn't bother me at all. Sincerely, Michał -- 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
