mes/scaffold/boot/call-cc.scm

;;; 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/>.

;; ,expand (let loop ((i 10)) (if (eq? i 0) 0 (begin (core:display-error i) (core:display-error "\n") (loop (- i 1)))))
;; (let loop ((i 10)) (if (eq? i 0) 0 (begin (display i) (display "\n") (loop (- i 1)))))

(define global "global\n")
(define v #(0 1 2))
(define vv #(#(0 1 2) 0 1 2))
((lambda (loop)
   (set! loop
         (lambda (i)
           (core:display global)
           (core:display (values 'foobar global))
           (core:display v)
           (core:display vv)
           (core:display "i=")
           (core:display i)
           (core:display "\n")
           (if (eq? i 0) 0
               (begin
                 ((lambda (cont seen?)
                   (+ 1 (call-with-current-continuation (lambda (c) (set! cont c) 1)))
                   (core:display "  seen?=")
                   (core:display seen?)
                   (core:display "\n")
                   (if seen? 0
                       (begin
                         (set! seen? #t)
                         (cont 2))))
                  #f #f)
                 (loop (- i 1))))))
   (loop 10000))
 *unspecified*)

;; ((lambda (cont seen?)
;;    (+ 1 (call-with-current-continuation (lambda (c) (set! cont c) 1)))
;;    (core:display "seen?=")
;;    (core:display seen?)
;;    (core:display "\n")
;;    (if seen? 0
;;        (begin
;;          (set! seen? #t)
;;          (cont 2))))
;;  #f #f)