Thanks Steve! That's very neat. Pretty much a "canonical" macro example.
Adrian. On Tue, Jun 2, 2009 at 5:50 AM, Stephen C. Gilardi <squee...@mac.com> wrote: > Here's a macro I've found useful for loading and running Clojure programs > from the REPL: > > (defmacro run > "Loads the specified namespace and invokes its \"main\" > function with optional args. ns-name is not evaluated." > [ns-name & args] > `(do > (require '~ns-name :reload-all) > ((ns-resolve '~ns-name '~'main) ~...@args))) > > An example namespace that works with it (in hello.clj at a classpath root): > > (ns hello) > > (defn main > [& args] > (apply println "hi" args)) > > and a REPL session: > > user=> (run hello) > hi > nil > user=> (run hello :clojure "is" \# > (.gcd (bigint 1169687) (bigint 311791))) > hi :clojure is # 1 > nil > user=> > > I think the quoting on "main" in the ns-resolve call is quite interesting. > macroexpand-ing variations on it is a heap of educational Clojure macro-fu > fun! > > --Steve > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
