What if it isn't inside a constant? user=> (eval `(fn [] ~#'x)) #<user$eval1366$fn__1367 user$eval1366$fn__1367@15dbb76>
user=> (with-local-vars [x nil] (eval `(fn [] ~x))) CompilerException java.lang.NullPointerException, compiling:(NO_SOURCE_PATH:1:1) How about functions? These are unreadable but they still eval correctly inside constants. user=> (letfn [(x [] nil)] (eval x)) #<user$eval1377$x__1378 user$eval1377$x__1378@5fea6729> user=> (letfn [(x [] nil)] (eval [x])) [#<user$eval1381$x__1382 user$eval1381$x__1382@e3b7c27>] user=> (read-string "#<user$x user$x@1981e4d>") RuntimeException Unreadable form clojure.lang.Util.runtimeException (Util.java:219) user=> (defn x [] nil) #'user/x user=> (eval x) #<user$x user$x@14ff1714> user=> (eval [x]) [#<user$x user$x@5892d4a8>] user=> (read-string "#<user$eval1381$x__1382 user$eval1381$x__1382@e3b7c27>") RuntimeException Unreadable form clojure.lang.Util.runtimeException (Util.java:219) On 8 August 2013 14:58, Christophe Grand <christo...@cgrand.net> wrote: > The error is caused by the fact that eval sees the var as a constant (or > part of) and tries to serialize the constant. > #<Var: --unnamed--> is unreadable while #'user/x is that explains teh > difference in behaviour. > > > On Thu, Aug 8, 2013 at 3:40 PM, Jamie Brandon <ja...@scattered-thoughts.net> > wrote: >> >> This has me stumped: >> >> user=> (with-local-vars [x nil] (eval x)) >> #<Var: --unnamed--> >> user=> (with-local-vars [x nil] (eval [x])) >> CompilerException java.lang.NullPointerException, >> compiling:(NO_SOURCE_PATH:1:1) >> >> By comparison: >> >> user=> (def x nil) >> #'user/x >> user=> (eval #'x) >> #'user/x >> user=> (eval [#'x]) >> [#'user/x] >> >> -- >> -- >> 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. >> >> > > > > -- > On Clojure http://clj-me.cgrand.net/ > Clojure Programming http://clojurebook.com > Training, Consulting & Contracting http://lambdanext.eu/ > > -- > -- > 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.
