The docstring for iterate says that it returns a lazy sequence, but it returns a Cons wrapped around a LazySeq. This means, for example, that realized? can't be applied to what iterate returns. Is this a problem with the iterate docstring? Or should realized? be applicable to Conses? I assume that there's a good reason that iterate returns a Cons instead of a LazySeq.
Clojure 1.6.0 user=> (doc iterate) ------------------------- clojure.core/iterate ([f x]) Returns a lazy sequence of x, (f x), (f (f x)) etc. f must be free of side-effects nil user=> (def xs (iterate inc 0)) #'user/xs user=> (class xs) clojure.lang.Cons user=> (class (rest xs)) clojure.lang.LazySeq user=> (realized? (rest xs)) false user=> (realized? xs) ClassCastException clojure.lang.Cons cannot be cast to clojure.lang.IPending clojure.core/realized? (core.clj:6883) user=> (take 5 xs) (0 1 2 3 4) user=> (realized? (rest xs)) true user=> (realized? xs) ClassCastException clojure.lang.Cons cannot be cast to clojure.lang.IPending clojure.core/realized? (core.clj:6883) user=> (doc realized?) ------------------------- clojure.core/realized? ([x]) Returns true if a value has been produced for a promise, delay, future or lazy sequence. nil -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
