I'm trying to create a new ISeq type, just to try to get the hang of
extending sequences. It's not working, though. As far as I can tell, I've
implemented all necessary methods. However, I still get an error when
attempting to create an instance of the type.
When I enter the following in the REPL:
(ConsCell. 1 nil)
The repl complains about the nth function not being supported. However,
I'm not sure how to go about implementing it. Any ideas?
(deftype ConsCell [car cdr]
clojure.lang.ISeq
(first
[this] (-> this .car))
(next
[this] (-> this .cdr))
(more
[this] (-> this .cdr))
(cons
[this obj] (ConsCell. obj this))
(seq
[this] this)
(equiv
[this other] false)
(count
[this]
(if (nil? (-> this .cdr))
1
(inc (.count cdr))))
;; Can't implement nth here, since it's not a member of the interface
;(nth
;[this n]
;(if (zero? n)
;(-> this .car)
;(.nth cdr (dec n))))
)
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