user=> (defn foo [_] "foo") user=> (defprotocol IFoo (foo [_])) Warning: protocol #'user/IFoo is overwriting function foo IFoo
user=> (extend-protocol IFoo nil (foo [_] "IFoo")) nil user=> (foo nil) "IFoo" user=> (foo 1) java.lang.IllegalArgumentException: No implementation of method: :foo of protocol: #'user/IFoo found for class: java.lang.Integer (NO_SOURCE_FILE:0) ; Side note: Is there any way to access the old global "foo" function at this point? user=> (defn foo [_] "foo") ; I'd prefer a warning here #'user/foo user=> (foo nil) "foo" user=> (foo 1) "foo" -- Aaron -- 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