2011/1/3 Allen Johnson <akjohnso...@gmail.com>: >> I can't see where the variables are boxed into objects. Both the loop >> and the let declare them as primitives if they are given primitives. >> Perhaps they are already objects before they reach the inc and dec >> function calls in the recur, but if so, it's a mystery to me why. > > Yeah that is interesting. I'm not sure the _why_ of it but I attempted > to narrow it down and it looks like it has something to do with nested > loops and recur. The code below is basically the same thing except the > first one generates auto-boxing warnings while the latter does not. > I'd also like to know why this is. > > (set! *warn-on-reflection* true) > > ;; generates auto-boxing warnings > (defn example [^long x] > (loop [a x] > (let [i (loop [k a] k)] > (if false (recur i) i)))) > > ;; no warnings > (defn example [^long x] > (loop [a x] > (let [i (let [k a] k)] > (if false (recur i) i))))
Very nice minimal example. If someone has access for filing bugs to assembla, could this one please be filed in? > Also, I couldn't resist giving qsort another attempt. I got a new > laptop and need to break it in somehow :) So here is a rewritten > version based on an example in "Introduction to Algorithms" without > casts. > > https://gist.github.com/763139 Nice traditional example, with swap and partition functions. Very pretty, and readable! Albert -- http://albert.rierol.net -- 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
