That sort of works for my use case. What I want to do is define a grammar...
(def num-graph (graph num ~(or ~succ ~zero) succ (succ ^x ~num) zero zero)) ... attach actions .... (def num-out (output-in num-graph 'zero (fnk [] 0) 'succ (fnk [x] (inc x)))) ... and compile the result ... strucjure.regression.tests> (graph->view 'num num-out) (clojure.core/letfn [(num ...) (succ ...) (zero ...)] (clojure.core/fn [input__2288__auto__] (num input__2288__auto__))) This works fine as long as the fnks dont close over anything, but that's very limiting. If I eval that code and *then* wrap it in (binding ...) I can have closures but that now means that I can't do call-site compilation. I'll have to poke around a bit more... On 28 August 2013 18:32, Aaron Cohen <aa...@assonance.org> wrote: > I'm not sure if you'll consider this hacky or not. > > (def ^:dynamic *fn-helper*) > > (defn eval-at-one [f] (binding [*fn-helper* f] (eval '(*fn-helper* 1)))) > > > On Wed, Aug 28, 2013 at 1:28 PM, Jamie Brandon > <ja...@scattered-thoughts.net> wrote: >> >> You will also run into problems if your functions close over any data: >> >> user> (let [f (fn [] 1)] (eval `(~f))) >> 1 >> nil >> user> (let [x 1 f (fn [] x)] (eval `(~f))) >> IllegalArgumentException No matching ctor found for class >> user$eval38616$f__38617 clojure.lang.Reflector.invokeConstructor >> (Reflector.java:163) >> >> I'm struggling with this as well, I'm definitely interested in finding >> a non-hacky way to pass closures through eval without leaking memory. >> >> Perhaps something like: >> >> (let [x 1 >> f (fn [] x) >> f-sym (gensym)] >> (intern *ns* gensym (weak-ref f)) >> (with-meta (eval `(fn [] (do-stuff-with @~f))) {::strong-ref f})) >> >> So that way f will be freed up when the resulting fn is gced. >> >> On 28 August 2013 17:59, Ben Wolfson <wolf...@gmail.com> wrote: >> > On Wed, Aug 28, 2013 at 9:27 AM, Jamie Brandon >> > <ja...@scattered-thoughts.net> wrote: >> >> >> >> >> >> If you aren't worried about leaking memory, a possible workaround is >> >> to intern the fn in some namespace and then put the symbol in the >> >> macro output. >> > >> > >> > Hrm, I hope it doesn't come to that---as long as I'm creating the >> > functions >> > with their metadata, I can make things work, because I can add extra >> > information to the with-meta call or do extra things when making the >> > call. >> > What I'd like, though, is for it to be possible to copy the metadata >> > over to >> > a new function by client code, just using the regular (with-meta (fn >> > [blah] >> > blah) (meta old-fn)) mechanism. But then the sneaky symbol, or whatever >> > extra thing, in the metadata, that's used in the form to be eval-ed is >> > pointing to the original function, not the one passed in. Maybe just >> > providing a utility for fixing up the metadata is the right move, though >> > it's kidn of dissatisfying. >> > >> > >> > -- >> > Ben Wolfson >> > "Human kind has used its intelligence to vary the flavour of drinks, >> > which >> > may be sweet, aromatic, fermented or spirit-based. ... Family and social >> > life also offer numerous other occasions to consume drinks for >> > pleasure." >> > [Larousse, "Drink" entry] >> > >> > -- >> > -- >> > 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/groups/opt_out. >> >> -- >> -- >> 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/groups/opt_out. > > > -- > -- > 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/groups/opt_out. -- -- 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/groups/opt_out.