(module
 duck
 (
  module*
  duck-extract-defines
  duck-extract-doc
  )

 (import scheme
	 (chicken base)
	 (chicken syntax))

 (define-syntax duck-extract-defines
   (syntax-rules
       (define define/doc
	 make-parameter
	 define* define*/doc
	 define-syntax define-syntax/doc)
     ((_ (define-syntax id transformer))
      (define-syntax id transformer))
     ((_ (define-syntax/doc id doc transformer))
      (define-syntax id transformer))

     ((_ (define var val))
      (define var val))
     ((_ (define/doc var doc val))
      (define var val))

     ((_ (define/doc var doc arg (make-parameter val)))
      (define var val))

     ((_ (define* var val))
      (define* var val))
     ((_ (define*/doc var doc val))
      (define* var val))

     ((_ (define (proc . args) expr ...))
      (define (proc . args) expr ...))
     ((_ (define/doc (proc . args) doc expr ...))
      (define (proc . args) expr ...))

     ((_ (define* (proc . args) expr ...))
      (define* (proc . args) expr ...))
     ((_ (define*/doc (proc . args) doc expr ...))
      (define* (proc . args) expr ...))

     ((_ expr)
      expr)))

 (define-syntax duck-extract-doc
   (syntax-rules (define/doc make-parameter define*/doc define-syntax/doc)
     ((_ (define-syntax/doc id doc transformer))
      (list 'STX 'id `doc))
     ((_ (define/doc (proc . args) doc expr ...))
      (list 'FUN 'proc `doc 'args))
     ((_ (define*/doc (proc . args) doc expr ...))
      (list 'FUN 'proc `doc 'args))
     ((_ (define/doc var doc arg (make-parameter val)))
      (list 'PAR 'var `doc 'arg 'val))
     ((_ (define*/doc var doc arg (make-parameter val)))
      (list 'PAR 'var `doc 'arg 'val))
     ((_ (define/doc var doc val))
      (list 'VAR 'var `doc 'val))
     ((_ (define*/doc var doc val))
      (list 'VAR 'var `doc 'val))
     ((_ expr)
      #f)))

 (define-syntax module*
   (syntax-rules (#:doc)
     ((_ modname #:doc (doc ...) exports expr ...)
      (module
       modname
       exports
       (import (only scheme define set! quote reverse list quasiquote)
	       (only (chicken module) export)
	       (chicken base)
	       duck
	       )
       (export modname)
       (duck-extract-defines expr) ...
       (define modname
	 (list (list 'MOD 'modname `(doc ...))
	       (duck-extract-doc expr) ...))))
     ((_ modname expr ...)
      (module* modname #:doc () expr ...))))
 
 )