Of course I meant (map identity (1 2)) On Wed, Jul 7, 2010 at 6:03 PM, Nicolas Oury <nicolas.o...@gmail.com> wrote:
> If you macroexpand the first foo in (foo 1 2), you will see something like > (1 2) > > when this gets evaluated, Clojure is not happy about 1 not being a > function. > > > On Wed, Jul 7, 2010 at 5:49 PM, Cameron <cpuls...@gmail.com> wrote: > >> Hello all! Today, I've either discovered a bug, or I've discovered a >> flaw in my understanding of macros. Most likely the latter :-) Could >> anyone set me straight? >> >> While this is not the macro I was trying to write, it falls over in >> the same place. >> >> (user=> (defmacro foo [& xs] `(map identity ~xs)) >> #'user/foo >> user=> (foo 1 2) >> java.lang.ClassCastException: java.lang.Integer cannot be cast to >> clojure.lang.IFn (NO_SOURCE_FILE:0) >> >> However, this does work (though it doesn't feel idiomatic). >> >> user=> (defmacro foo [& xs] `(map identity [...@xs])) >> #'user/foo >> user=> (foo 1 2) >> (1 2) >> >> I have tried this on todays (July 7) bleeding edge and 1.1 with the >> same results. >> >> -- >> 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<clojure%2bunsubscr...@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
