;;; -*-scheme-*-

;;; Mes --- Maxwell Equations of Software
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; test.mes: This file is part of Mes.
;;;
;;; Mes is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; Mes is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Mes.  If not, see <http://www.gnu.org/licenses/>.

;; The Maxwell Equations of Software -- John McCarthy page 13
;; http://www.softwarepreservation.org/projects/LISP/book/LISP%201.5%20Programmers%20Manual.pdf

(display 123)

4
(newline)

(display 'hello-display-symbol)
(newline)

(display '(0 1 2))
(newline)

(display (- 12 3))
(newline)

(define (+ x y) (- x (- 0 y)))
(display (+ 3 4))

(newline)

(define-macro (and x y)
  (cond (x y)
        (#t #f)))

(define-macro (or x y)
  (cond (x x)
        (#t y)))

;; EOF2
;; EOF
;; EOF2

(display 'and-0-1:)
(display (and 0 1))
(newline)
(display 'and-#f-2:)
(display (and #f 2))
(newline)

(display 'or-0-1:)
(display (or 0 1))
(newline)
(display 'or-#f-2:)
(display (or #f 2))
(newline)

(define (split-params bindings params)
  (cond ((null bindings) params)
        (#t (split-params (cdr bindings)
                          (append params (cons (caar bindings) '()))))))

(define (split-values bindings values)
  (cond ((null bindings) values)
        (#t (split-values (cdr bindings)
                          (append values (cdar bindings) '())))))

(define-macro (let1 bindings body)
  (cons (cons 'lambda (cons (split-params bindings '()) (cons body '())))
        (split-values bindings '())))

(let1 ((a 3)
      (b 4))
      ((lambda ()
         (display 'let-a:3-b:4)
         (newline)
         (display 'a:)
         (display a)
         (newline)
         (display 'b:)
         (display b)
         (newline))))

(display 'let1-dun)
(newline)

(define-macro (let bindings . body)
  (cons (cons 'lambda (cons (split-params bindings '()) body))
        (split-values bindings '())))

(let ((p 5)
       (q 6))
      (display 'let-p:3-q:4)
      (newline)
      (display 'p:)
      (display p)
      (newline)
      (display 'q:)
      (display q)
      (newline))


(display
 (let ((p 5)
       (q 6))
   (display 'hallo)
   (display p)
   (display 'daar)
   (display q)
   (display 'dan)))

(newline)
(display 'let-dun)
(newline)

'()