Using defining macros as non top-level forms may not be forbidden by the language but its use is generally discouraged. See http://clhs.lisp.se/Issues/iss104_w.htm for a discussion about this issue in Common Lisp for some background context. In short, compile time effects may not be captured whenever you use defining macros as non top-level forms. I think you're seeing something like this manifest here. In this case, since you referenced a var which was not installed when the compiler reaches the calling code, the compiler will throw this error message. I would suggest rethinking this because the solution is ugly, but you should use something like clojure.core/resolve or clojure.core/ns-resolve to resolve the var dynamically and then funcall it.
On Monday, August 8, 2016 at 2:52:37 PM UTC-4, fah...@gmail.com wrote: > > user> (macroexpand-1 '(defn foo [x] (inc x))) > (def foo (clojure.core/fn ([x] (inc x)))) > > If defn is just a macro, then it seems I can do this: > > user> (defn bar [] (fn ([x] (inc x)))) > #'user/bar > > user> (def foo (bar)) > #'user/foo > > user> foo > #function[user/bar/fn--10778] > > But the result is a little different than doing it directly with defn: > > user> (defn foo [x] (inc x)) > #'user/foo > > We had #'user/*bar/fn--10778* vs #'user/foo. But either way, foo is bound > to something. > > Is the difference significant? It seems like it is because I tried > something similar in my project and got the following: > > IllegalStateException Attempting to call unbound fn: #'p.core/default-step > clojure.lang.Var$Unbound.throwArity (Var.java:43) > p.core> default-step > #function[p.core/make-step/fn--10747] > > Function default-step was def'd using make-step which returned a function > and default-step is bound, so why does the repl say it is not? > > (defn make-step [some-args] > (fn ([other-args] > (some-body using-both-args)))) > > Basically I need to define a bunch of similar functions and am trying to > use another function to help define them (instead of using a macro). But it > seems I'm doing something wrong... > -- 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.
