@Jürgen and Chris Thank you very much for helping me enlarge my understanding of macros!
I realize that learning the subtleties of a macro implementation is not easy but well worth the effort. It is also quite interesting that a macro as it seems takes two implicit extra arguments. I am curious what these arguments might be and hope someone can tell us. Stefan > Actually, it's not. That's becuase the compiler inserts a couple of > extra implicit arguments to all calls to macros. So in fact, my-infix, > at runtime, expects 3 arguments. Check this out: > > user=> (defmacro foo [x] x) > #'user/foo > user=> (foo 23) > 23 > user=> (def foo2 (var-get #'foo)) > #'user/foo2 > user=> (foo2 23) > java.lang.IllegalArgumentException: Wrong number of args (1) passed > to: user$foo (NO_SOURCE_FILE:0) > user=> (foo2 23 34 45) > 45 > > I hope that makes it clearer. I certainly feel like I understand > macros a little better after figuring this out. > > As for what exactly the two implicit args to macros are - I don't > know. Someone else will have to explain that. > > - Chris -- 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
