Common lisp allows you to call DEFINE-METHOD-COMBINATION. (Steele p830) There is a default generic method combination defined which can be modified by this call.
If Clojure used a function to do the method resolution then it would be possible to replace this with a user defined function. This would allow all kinds of dispatching control. Tim Daly On 10/25/2010 5:55 PM, Mark Nutter wrote:
So in this particular case I wouldn't care, but in general I'd expect the prefer-method stuff to kick in. :)Oops, forgot about prefer-method. My noobishness is showing again. Well, in for a dime in for a dollar. Here's something I whipped up just for the general amusement of the list. It's not quite what you asked for, but it might be suitable as a source of ideas, instruction, derision, or whatever. (defmulti bar (fn [x y& more] [x y])) (defmethod bar :default [x y& more] (if more ; did default loop back to itself? nil (some identity [(bar :wild y x) (bar x :wild y)]))) (defmethod bar [:wild 16] [x-wild y& more] (let [x (first more)] (str "First arg wild " x ", " y))) (defmethod bar [42 :wild] [x y-wild& more] (let [y (first more)] (str "Second arg wild " x ", " y))) (defmethod bar [10 20] [x y] (pr-str "Plain vanilla args " x ", " y)) user> (bar 10 20) "\"Plain vanilla args \" 10 \", \" 20" user> (bar 42 20) "Second arg wild 42, 20" user> (bar 10 16) "First arg wild 10, 16" user> (bar 42 16) "First arg wild 42, 16"user> (bar 10 20) "\"Plain vanilla args \" 10 \", \" 20" user> (bar 42 20) "Second arg wild 42, 20" user> (bar 10 16) "First arg wild 10, 16" user> (bar 42 16) "First arg wild 42, 16"
-- 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
