path: root/cbasic.lisp

;;; Not sure yet if it's a good idea or not,
;;; but I'm trying to keep the number of top-level functions the same as in OCaml.

(defun one-command (st)
   (with-handler #'error-handler
      (let ((l parse (read-line)))
           (case (car l)
                 ((line) (insert (cadr c)))
                 ((p-end) (throw 'end nil)))))) ; throw and conditions are orthogonal

(defclass <state> () ((program :accessor prog)
                      (env :accessor env)))
(defmethod initialize-object :after ((self <state>) initargs)
   (setf (program self) nil)
   (setf (env self) nil))

(defun main ()
   (catch 'end (lambda ()
                  (format (standard-output) "BASIC version 0.1~%~%")
                  (for ((st (create (class <state>))))
                       (())
                       (format (standard-output) "> ")
                       (catch 'error (one-command st)))))
   (format (standard-output) "See you later...~%"))