Let me rephrase my question to avoid unfortunate confusion with standard "count" function: Suppose I have extended my own IMyCountable protocol with a single "mycount" method to String class. What happens when I call (mycount "some string")?
- Dmitry On May 7, 1:42 pm, Jonathan Fischer Friberg <odysso...@gmail.com> wrote: > See:http://clojure.org/protocols > "defprotocol will automatically generate a corresponding interface" > Although it is not true that a protocol is equivalent to an interface. > > For deep "under the hood" you can check out the > source:https://github.com/clojure/clojure/blob/master/src/clj/clojure/core_d... > > As for your specific case: > clojure.core/count uses clojure.lang.RT/count [1] > This function goes through some type checks, the first one being if the type > implements clojure.lang.Counted [2] and if it is, calls the count function > implemented in that type. > > [1]https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/R... > [2]https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/C... > > On Sat, May 7, 2011 at 10:00 PM, Dmitry Kakurin > <dmitry.kaku...@gmail.com>wrote: > > > > > > > > > Is there a document describing internal implementation of Clojure > > protocols? > > I.e. what is happening "under the hood"? > > To be specific suppose I have extended ICountable protocol with a > > single "count" method to String class. What happens when I call (count > > "some string")? > > At what point dynamic dispatch happens and what underlying JVM > > mechanism is used? > > > - Dmitry > > > -- > > 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 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
