On Tue, Jul 9, 2013 at 10:46 AM, Gary Trakhman <gary.trakh...@gmail.com>wrote:
> The TCO macro already exists: https://github.com/cjfrisz/clojure-tco > > That is super cool. I feel compelled to observe that using a continuation monad run by a trampoline also allows for tail call elimination: user=> (require '[monads.cont :as c] '[monads.core :refer [>>= return]]) nil user=> (declare od?) #'user/od? user=> (defn evn? [x] (if (zero? x) (return true) (od? (dec x)))) #'user/evn? user=> (defn od? [x] (if (zero? x) (return false) (>>= (return nil) (fn [_] (evn? (dec x)))))) #'user/od? user=> (c/run-cont (evn? 5000000)) true But the result is about 2x slower than what the clojure-tco macro produces (around 600ms vs around 300ms, for me). -- Ben Wolfson "Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure." [Larousse, "Drink" entry] -- -- 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/groups/opt_out.
