On Thursday, May 29, 2014 8:43:58 PM UTC-7, squeegee wrote: > > > On May 29, 2014, at 7:11 PM, ian.tegebo <ian.t...@gmail.com <javascript:>> > wrote: > > user> (binding [*ns* (the-ns 'blah)] (defn foo [])) > #'user/foo > user> (binding [*ns* (the-ns 'blah)] (eval '(defn foo []))) > #'blah/foo > > In the first case, the defn form is compiled before the binding to (the-ns > ‘blah) is in effect. >
It's exactly this point that's confusing. The defn form expands into a def, whose documentation says it uses the current namespace. The current namespace, as I understand it, is what's bound to *ns* which IIUC should have been accomplished with the "binding" macro. The first code snippet was meant to demonstrate that. Here's another variant in case there's confusing about *ns* being lexical: user> (defn println-ns [] *ns*) #'user/println-ns user> (binding [*ns* (the-ns 'blah)] (println-ns)) #<Namespace blah> I don't see the reason why def should behave as it currently does; it seems like it should lookup the current thread-binding for *ns*, making the second case's use of eval unnecessary. Since it doesn't, I'd like to know why it couldn't (or shouldn't) do the thing that seems more intuitive. That said, if the special form let* does not evaluate its arguments in left to right order such that let* actually evaluates def's before anything else, then I would understand why the current behavior is the way it is. However, then I'd just be curious about let*... -- 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/d/optout.
