Hello,
Suppose I have a byte array representing an array of integers:
$ clojure-repl
Clojure 1.5.1
user=> (def v
(let [a (byte-array (map byte [0 0 0 1 0 2 0 3]))]
(reify clojure.lang.IPersistentVector
clojure.lang.Seqable
(seq [_] (for [i (range 0 (alength a) 2)]
(bit-or (bit-shift-left (aget a i) 8) (aget a (inc
i))))))))
#'user/v
user=> (println v)
[0 1 2 3]
nil
user=> (= [0 1 2 3] v)
ClassCastException user$fn$reify__2 cannot be cast to java.util.Collection
clojure.lang.APersistentVector.doEquiv (APersistentVector.java:88)
This is because doEquiv assumes that an instance of IPersistentVector also
is an instance of Collection. While that may be true for standard Clojure
data structures, this may not necessarily be the case for custom
implementations.
Am I really the first one to attempt something like that? Am I not supposed
to write custom implementations of standard interfaces? Should that bug be
raised in JIRA?
Thanks,
Vincent
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