Clojure compiles sources to Java ".class" files. To create a .class
file that can be run at the command line, you need a namespace with a
(:gen-class) directive and a function named "-main". Here's an
example:
(ns com.example.myapp
(:gen-class))
(defn -main []
(println "Hello, World!"))
This would go in a file named src/com/example/myapp.clj
To compile it, you would run the following commands:
mkdir classes
java -cp src:classes:clojure.jar clojure.lang.Compile
com.example.myapp
Then you can execute it with the command:
java -cp classes:clojure.jar com.example.myapp
In general, this process is made easier by build tools such as
Leiningen and clojure-maven-plugin; consult those tools' documentation
for more information.
-S
On Sep 5, 12:46 pm, CuppoJava <patrickli_2...@hotmail.com> wrote:
> Hi everyone,
> I'm writing a simple lisp for educational purposes, and I can't figure
> out how to do compilation. In particular, I can't figure out how I can
> get a compiled file to run in the same way as if it were loaded. I
> read on the webpage that Clojure can do this. Does anyone know how
> Clojure does it?
>
> eg. How can I compile this file, such that it does the same thing as
> when it's loaded:
>
> (def macro-helper (atom nil))
>
> (println "Setting Macrohelper!")
> (swap! macro-helper
> (constantly (fn []
> (println "Macro-Helper!")
> `(println "Runtime!"))))
>
> (defmacro mymacro []
> (println "Macro Expansion Time!")
> (@macro-helper))
>
> (mymacro)
>
> Thanks a lot!
> -Patrick
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