#! /bin/sh
# -*-scheme-*-
MES=${MES-$(dirname $0)/../scripts/mes}
echo ' ()' | cat $(dirname $0)/../module/mes/base-0.mes $0 /dev/stdin | $MES $MES_FLAGS "$@"
#paredit:||
exit $?
!#

;;; -*-scheme-*-

;;; Mes --- Maxwell Equations of Software
;;; Copyright © 2017,2018 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; 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/>.

;;(if guile? (exit 0))

(cond-expand
 ;;(guile-2)
 (guile
  (use-modules (ice-9 rdelim)))
 (mes
  (mes-use-module (mes test))
  (mes-use-module (mes guile))))

(pass-if "first dummy" #t)
(pass-if-not "second dummy" #f)

(pass-if-equal "read-string" "bla"
               (with-input-from-string "bla"
                 (lambda () (read-string))))

(pass-if-equal "open-input-string" "bla"
               (let* ((port (current-input-port))
                      (foo (open-input-string "bla")))
                 (set-current-input-port foo)
                 (let ((s (read-string)))
                   (set-current-input-port port)
                   s)))

;; NYACC
;; === input stack =====================

(define *input-stack* (make-fluid '()))

(define (reset-input-stack)
  (fluid-set! *input-stack* '()))

(define (push-input port)
  (let ((curr (current-input-port))
	(ipstk (fluid-ref *input-stack*)))
    (fluid-set! *input-stack* (cons curr ipstk))
    (set-current-input-port port)))

;; Return #f if empty
(define (pop-input)
  (let ((ipstk (fluid-ref *input-stack*)))
    (if (null? ipstk) #f
	(begin
	  (set-current-input-port (car ipstk))
	  (fluid-set! *input-stack* (cdr ipstk))))))

;; Return #f if empty
(define (pop-input)
  (let ((ipstk (fluid-ref *input-stack*)))
    (if (null? ipstk) #f
	(begin
	  (set-current-input-port (car ipstk))
	  (fluid-set! *input-stack* (cdr ipstk))))))

(pass-if-equal "push-input"
    "bla"
  (let ()
    (push-input (open-input-string "bla"))
    (let ((ch (read-char)))
      (unread-char ch))
    (let ((x (read-string)))
      (let ((pop (pop-input)))
        x))))

(pass-if-equal "input-stack/1"
    "hello world!"
  (with-output-to-string
    (lambda ()
      (with-input-from-string "hello X!"
        (lambda ()
          (let iter ((ch (read-char)))
            (unless (eq? ch #\X) (write-char ch) (iter (read-char))))
          (push-input (open-input-string "world"))
          (let iter ((ch (read-char)))
            (unless (eof-object? ch) (write-char ch) (iter (read-char))))
          (pop-input)
          (let iter ((ch (read-char)))
            (unless (eof-object? ch) (write-char ch) (iter (read-char))))
          )))))

(pass-if "input-stack/2"
  (let ((sp (open-input-string "abc")))
    (push-input sp)
    (and (pop-input) (not (pop-input)))))

(pass-if-equal "with-input-from-string peek"
               #\X
               (with-input-from-string "X"
                 (lambda () (peek-char))))

(pass-if-equal "open-input-string peek"
               #\X
               (let ((port (open-input-string "X")))
                 (set-current-input-port port)
                 (peek-char)))

(result 'report)