Leif is right, but isa?'s docstring doesn't mention this behavior. Here's the relevant code: https://github.com/clojure/clojure/blob/028af0e0b271aa558ea44780e5d951f4932c7842/src/clj/clojure/core.clj#L5120
On Tuesday, May 13, 2014 12:22:28 AM UTC-4, Leif wrote: > > Hi, Ranko. > > I *think* it's because vectors are handled specially during dispatch, to > easily handle both dispatching on multiple args and hierarchies: > > "isa?<http://clojure.github.io/clojure/clojure.core-api.html#clojure.core/isa?>works > with vectors by calling > isa?<http://clojure.github.io/clojure/clojure.core-api.html#clojure.core/isa?>on > their corresponding elements: > > (isa? [::square ::rect] [::shape ::shape])" > > --Leif > > On Monday, May 12, 2014 8:41:35 PM UTC-4, r wrote: >> >> Why is something like >> >> (derive [::matrix ::ring-element] ::ring-element) >> >> prevented by the assertion in clojure.core/derive? >> Is there something that is an actual show-stopper >> or is this an implementation detail? >> >> Cheers, >> ranko >> >> >> -- 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.
