2009/2/26 Rich Hickey <richhic...@gmail.com> > > > > On Feb 26, 4:17 am, Laurent PETIT <laurent.pe...@gmail.com> wrote: > > 2009/2/26 Konrad Hinsen <konrad.hin...@laposte.net> > > > > > > > > > > > > > On 26.02.2009, at 01:51, Rich Hickey wrote: > > > > > > You raise interesting issues and I'd like to explore them further. > I'm > > > > not sure the issues you have with type-tag-or-class dispatch are all > > > > that prohibitive. In any case, I've added a type function that > returns > > > > the :type metadata or the class if none: > > > > > Thanks, that helps a lot! With a built-in universal dispatching > > > function, most of my problems should be solved. Another useful > > > function to have would be > > > > > (defn type-instance? > > > "Evaluates x and tests if it is an instance of the type or class t. > > > Returns true or false" > > > [t x] > > > (identical? t (type x))) > > > > > for type-based dispatching inside a function. > > > > or maybe generalize the existing 'instance? function to the above > definition > > ? > > I'm not sure I'd want to do that. You'd still need actual class > detectors.
But the definition and implementation of the above 'type-instance? function works for classes, and I don't think the point of the current instance? is to check that the given class parameter is a real class or not ? It is checking the type of the instance passed to it ? Or am I missing something ? > > > Rich > > > > --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
