I think the behavior you are seeing here is reasonable. When you mix compilation and dynamic access to vars, you need to reason carefully about the order in which things will happen.
More usefully: you can write a test in your var-get expression that will make it do what you want in all scenarios. Just add a bound? test before trying to get the value out of variable. Sorry this was missed earlier. Cheers, Stu > (ns testcomp) > (var-get (or (ns-resolve *ns* 'foo) > (intern *ns* 'foo :foo))) > ;; foo ;(1) > ;; (println foo) ;(2) > ;; (do foo 3) ;(3) > ;; (fn [] foo) ;(4) > ;; ((fn [] foo)) ;(5) > ;; ((fn [] (println foo))) ;(6) > > With (1)-(6) all commented out, behaviour is as expected: you can > compile and use testcomp, and foo is bound to :foo. > > With any of (1)-(3) uncommented, you can use testcomp with no problems > as long as it's uncompiled. If you compile it and subsequently attempt > to use it, you get an ExceptionInInitializerError caused by an > IllegalStateException due to Var testcomp/foo being unbound. What > seems to be happening (according to my limited understanding of > compilation) is that testcomp__init.class contains a reference to foo > which causes it to be interned (but unbound) before the body code is > run. ns-resolve then sees this Var, returns it, and var-get raises an > exception. > > With (1)-(3) commented out, (4)-(6) can be uncommented and expected > behaviour returns. testcomp__init.class no longer contains a reference > to foo (I checked with grep). > > I'm doing something like this in a library, and (5)/(6) provide a > workaround, but is this something that can be fixed at the language > level? I recognise it's not an issue that will commonly be run into, > and that the complexities of compilation might make it unavoidable. > > java version "1.6.0_14", clojure commit > 5f1e6ed540eab11281b7bfb19f831b7e445ed0d0 (1 Sep 09). > --~--~---------~--~----~------------~-------~--~----~ > 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 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
