63 lines
1.9 KiB
Scheme
63 lines
1.9 KiB
Scheme
;;; GNU Mes --- Maxwell Equations of Software
|
|
;;; Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
|
|
;;;
|
|
;;; This file is part of GNU Mes.
|
|
;;;
|
|
;;; GNU 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.
|
|
;;;
|
|
;;; GNU 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
(define (atom? x)
|
|
(if (pair? x) #f
|
|
(if (null? x) #f
|
|
#t)))
|
|
|
|
(define (memq x lst)
|
|
(if (null? lst) #f
|
|
(if (eq? x (car lst)) lst
|
|
(memq x (cdr lst)))))
|
|
|
|
(define (caar x) (car (car x)))
|
|
(define (cadr x) (car (cdr x)))
|
|
(define (cdar x) (cdr (car x)))
|
|
(define (cddr x) (cdr (cdr x)))
|
|
|
|
(define (loop first rest accum)
|
|
(core:display-error "\nloop\n first=")
|
|
(core:write-error first)
|
|
(core:display-error "\n")
|
|
(core:display-error " rest=")
|
|
(core:write-error rest)
|
|
(core:display-error "\n")
|
|
(core:display-error " accum=")
|
|
(core:write-error accum)
|
|
(core:display-error "\n")
|
|
((lambda (next)
|
|
(if (atom? first)
|
|
(next (cons (cons first
|
|
(car rest)) accum))
|
|
(if (null? rest)
|
|
accum
|
|
(next accum))))
|
|
(lambda (a)
|
|
(core:display-error "\nnext a=")
|
|
(core:write-error a)
|
|
(core:display-error "\n")
|
|
(core:display-error " rest=")
|
|
(core:write-error rest)
|
|
(core:display-error "\n")
|
|
(if (null? (cdr rest))
|
|
a
|
|
(loop (cadr rest) (cddr rest) a)))))
|
|
|
|
(loop 'functions '(() 'globals ()) '())
|