According to the code you need to implement an IPersistentCollection
and Seqable
You can browse or download the code:
http://github.com/richhickey/clojure/tree/master
look in src/clj/clojure/core.clj
for the definition of conj etc, which you can see call methods on
RT.java which is in
src/jvm/clojure/lang/RT.java
which in turn calls IPersistentCollection methods.
eg:
(def my-col
(proxy [clojure.lang.IPersistentCollection] []
(seq nil)
(count [] 5)
(cons [obj] nil)
(empty [] true)
(equiv [obj] true)))
user=> (count my-col)
0
user=> (conj my-col 5)
nil
On Aug 31, 9:35 am, "jonathan.arrender.sm...@gmail.com"
<jonathan.arrender.sm...@gmail.com> wrote:
> I was not sure from the documentation if conj, seq, etc are generic
> functions (multimetiod functions). Is there any easy way to defines
> these for a new type?
>
> Thanks!
> Jonathan
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