This repository contains an implementation of Oleg Kiselyov's CK-macros.

Cloning
-------

This repository includes submodules. If you use the following clone command,
it will automatically initialize and update each submodule in the repository.

  $ git clone --recursive https://github.com/mnieper/rapid-macros.git

Run Tests
---------

Assuming you have Chibi Scheme installed, you can run the tests by issuing
the command

  chibi-scheme -Irapid-lib tests.scm

in the main directory. The test suite should work as well with any other
R7RS-compliant implementation of the Scheme programming language although
the exact command-line syntax may differ.

Example
-------

  $ chibi-scheme -mscheme.base -mrapid.macros -msrfi.2
  > (define-macro simple-match ()
      ((simple-match expr (pattern template) ...)
       (m-expression
         `(call-with-current-continuation
           (lambda (return)
             (let ((e expr))
	       (or (and-let* ,(%compile-pattern 'pattern 'e) (return template))
                   ...
	           (error "does not match" expr))))))))
  > (define-macro %compile-pattern ()
      ((%compile-pattern '() 'e)
       '(((null? e))))
      ((%compile-pattern '(pattern1 pattern2 ...) 'e)
       `(((not (null? e)))
         (e1 (car e))
         (e2 (cdr e))
         ,@(%compile-pattern 'pattern1 'e1)
         ,@(%compile-pattern '(pattern2 ...) 'e2)))
      ((%compile-pattern 'x 'e)
       (m-if (m-symbol? 'x)
             '((x e))
  	     '(((equal? x e))))))
  > (define (f e)
      (simple-match e
  	            (10 'ten)
	            ((11 x) x)))
  > (f 10)
  ten
  > (f '(11 eleven))
  eleven