I have nothing to add for the problem itself (sorry) but am very interested in the *process* of answering this question. Presuming there are things to document here, I would love to see someone create a wiki page (on http://dev.clojure.org/display/community/Home) or a clojure-doc note or some place to capture tips and techniques for debugging problems like this.
Alex On Wednesday, September 11, 2013 10:59:50 AM UTC-5, Brian Craft wrote: > > This appears to have no effect on the problem. I tested with > jdbc/transaction, and with Sean's simple example: > > user=> (defn f [g] (g)) > #'user/f > user=> (defn t1 [n c] (f (fn [] (dorun (map identity c))))) > #'user/t1 > user=> (t1 0 (range 1000000)) > java.lang.OutOfMemoryError: Java heap space (NO_SOURCE_FILE:0) > user=> (defn t2 [n c] (f (fn [] (doseq [x c] (identity x))))) > #'user/t2 > user=> (defn t1 [n c] (f (^:once fn* [] (dorun (map identity c))))) > #'user/t1 > user=> (t1 0 (range 1000000)) > java.lang.OutOfMemoryError: Java heap space (NO_SOURCE_FILE:0) > > > > On Wednesday, September 11, 2013 7:39:48 AM UTC-7, Christophe Grand wrote: >> >> ^:once on fn* (not fn, the fn macro doesn't propagate metadata) instructs >> the commielr to clear closed-overs ASAP. It follows that you can't call >> such a function twice because it forgets its closed-overs. >> >> >> On Wed, Sep 11, 2013 at 4:36 PM, Brian Craft <craft...@gmail.com> wrote: >> >>> ugh. Can't find documentation for this. What does it do? >>> >>> On Wednesday, September 11, 2013 2:22:56 AM UTC-7, Christophe Grand >>> wrote: >>> >>>> >>>> On Wed, Sep 11, 2013 at 6:00 AM, Brian Craft <craft...@gmail.com>wrote: >>>> >>>>> (defmacro transaction >>>>> [& body] >>>>> `(transaction* (fn [] ~@body))) >>>>> >>>>> I'm not sure how to avoid that. The anonymous function created here >>>>> doesn't take parameters. >>>>> >>>> >>>> The fix for this is: >>>> (defmacro transaction >>>> [& body] >>>> `(transaction* (^:once fn* [] ~@body))) >>>> >>>> It should be the default for all one-shot fns. >>>> >>>> Christophe >>>> >>>> -- >>>> On Clojure http://clj-me.cgrand.net/ >>>> Clojure Programming http://clojurebook.com >>>> Training, Consulting & Contracting http://lambdanext.eu/ >>>> >>> >> >> >> -- >> On Clojure http://clj-me.cgrand.net/ >> Clojure Programming http://clojurebook.com >> Training, Consulting & Contracting http://lambdanext.eu/ >> > -- -- 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.
