Hi Patrick, If that really annoys you, you can tell the repl to display Delay instances as dumb objects: (defmethod print-method clojure.lang.Delay [x w] ((get-method print-method Object) x w))
user=> (defmethod print-method clojure.lang.Delay [x w] ((get-method print-method Object) x w)) #<MultiFn clojure.lang.mult...@1f6d156> user=> (def del (delay (println "printed") (+ 2 3))) #'net.cgrand.parsley/del user=> del #<Delay clojure.lang.de...@3e090f> user=> (force del) ; note that @del would be equivalent here printed 5 Christophe On Mon, Sep 21, 2009 at 5:53 PM, patrickdlogan <patrickdlo...@gmail.com>wrote: > > I expected a delay only to be forced by an explicit call to force. > instead it looks like, being a kind of IDeref, a delay will be forced > by the REPL. > > e.g. > > user=> (def del (delay (println "printed") (+ 2 3))) > #'user/del > user=> del > printed > #<de...@8691dee: 5> > user=> (force del) > 5 > > The documentation seems to imply the only way to force a delay is > through the force procedure... > > " Takes a body of expressions and yields a Delay object that will > invoke the body only the first time it is forced (with force), and > will cache the result and return it on all subsequent force > calls." > > > > -- Professional: http://cgrand.net/ (fr) On Clojure: http://clj-me.blogspot.com/ (en) --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
