On Thu, Apr 15, 2010 at 6:27 AM, Joost <jo...@zeekat.nl> wrote: > But on the master branches I get: > > $ java -server -Djava.net.preferIPv4Stack=true -Dpid=30893 - > Djava.awt.headless=true -cp /home/joost/lib/clojure/clojure-1.2.0- > master-SNAPSHOT.jar:/home/joost/lib/clojure-contrib/clojure- > contrib.jar clojure.main > Clojure 1.2.0-master-SNAPSHOT > user=> (use 'clojure.contrib.sql) > nil > user=> (binding [clojure.contrib.sql/do-commands #(prn %) > clojure.contrib.sql/do-prepared #(prn %1 %2)] > (do-commands "bla")) > java.lang.Exception: no current database connection (NO_SOURCE_FILE:0) > > It looks like I can't bind do-commands... But this works:
This is due to a little-known feature in the current git master called direct binding. Basically the value of any var bound to a function inside any namespace beginning with "clojure" is fixed at compile time, so there's no way to rebind it. It's intended to give a performance boost since the step of var lookup may be skipped, but it also has the side-effect of making you think you're going a little crazy if you don't know about it. Unfortunately right now there's no way to opt-out, though we've discussed some mechanisms that might allow that in the future. It sounds like it might get turned back off before 1.2 is released: http://www.assembla.com/spaces/clojure/tickets/271-determine-direct-binding-policy-and-controls The only workaround right now is to create your own function that wraps the function you're trying to rebind and rebind your wrapper instead. -Phil -- 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
