On Jan 21, 11:48 pm, Mark Engelberg <mark.engelb...@gmail.com> wrote: > Thanks for the thread links. This is basically what I suspected -- if > you want to use structs in multimethods, you have to roll your own > constructor which adds some kind of "type" tag to either the hashmap > or the metadata. > > It just seems like a common case, so I was hoping there was a more > convenient way. But I guess that's what macros are for...
In that vein, there's this thread: http://groups.google.com/group/clojure/browse_thread/thread/257caab7867aa09c?hl=en# which may do something like what you would like. This is also an issue I'm interested in, and I was planning on making some group/blog posts about it in the near future. FYI, I usually follow the following pattern: My "interface" files contain a bunch of (defmulti ...)s, which mostly dispatch on the :class of the first argument Then, my "class" files contain (derive ::MyClass :namespace/ParentClass) (defstruct my-class :class :a :b :c) (defn make-my-class [a b c] (struct my-class ::MyClass a b c)) followed by a bunch of (defmethod ...)s But this does involve a bit of repetition, and I'm not sure if this is the most idiomatic way to do things currently. -Jason --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
