Clobol

Compile a very small subset of Clojure to gnu-cobol

This project exists because I wanted to learn more about Clojure's AST, compilers and COBOL.

Generate COBOL

Start up a REPL.

clj -R:nREPL -m nrepl.cmdline --middleware "[cider.nrepl/cider-middleware]"

To compile the examples for yourself, in clobol.core:

(save "src/clobol/cobol/hello_world.cob" (compile-clojure-ns 'clobol.clojure.hello-world))

Examples

(ns clobol.clojure.hello-world)

(println "Hello World!!")

will compile to

      IDENTIFICATION DIVISION.
      PROGRAM-ID. hello-world.
      DATA DIVISION.
      PROCEDURE DIVISION.
      DISPLAY "Hello World!!".

(ns clobol.clojure.let)

(let [n 5]
  (println "Number" n))

      IDENTIFICATION DIVISION.
      PROGRAM-ID. let.
      DATA DIVISION.
      WORKING-STORAGE SECTION.
      01 n BINARY-LONG VALUE 5.
      PROCEDURE DIVISION.
      DISPLAY "Number" n.

Compile COBOL executable

to compile a Cobol file use gnu-cobol.

brew install gnu-cobol

cobc -x -free hello_world.cob

./hello_world