Re: Main Function for Program Entry Point

[Stephen C. Gilardi]

On Mar 15, 2009, at 4:42 PM, Tom Faulhaber wrote:

the :gen-class directive needs (:main true) to tell it you have a main
function:

(ns temp-converter
 (:gen-class (:main true))

(:main true) is the default for the :gen-class directive.

Here's the relevant portion of (doc ns) (and http://clojure.org/API#ns):

        (:gen-class ...), when supplied, defaults to :name
          corresponding to the ns name, :main true, :impl-ns same as ns, and
          :init-impl-ns true. All options of gen-class are
          supported. The :gen-class directive is ignored when not
          compiling. If :gen-class is not supplied, when compiled only an
          nsname__init.class will be generated.

and the main function needs an argument declaration:

(defn -main [] (main))

This declaration

        (defn -main [& args] ...)



--Steve

That declaration works, but doesn't allow for (java level) command line arguments. allows for any number of command line arguments which may be desirable in some cases.

smime.p7s
Description: S/MIME cryptographic signature