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lineio.scm, null.scm, optargs.scm, r4rs.scm, r5rs.scm, receive.scm, safe-r5rs.scm, streams.scm: Updated copyright notice.
65 lines
2.7 KiB
Scheme
65 lines
2.7 KiB
Scheme
;;;; Copyright (C) 2000, 2001 Free Software Foundation, Inc.
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;;;;
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;;;; This program is free software; you can redistribute it and/or modify
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;;;; it under the terms of the GNU General Public License as published by
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;;;; the Free Software Foundation; either version 2, or (at your option)
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;;;; any later version.
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;;;;
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;;;; This program is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;;; GNU General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU General Public License
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;;;; along with this software; see the file COPYING. If not, write to
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;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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;;;; Boston, MA 02111-1307 USA
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;;;;
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;;;; As a special exception, the Free Software Foundation gives permission
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;;;; for additional uses of the text contained in its release of GUILE.
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;;;;
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;;;; The exception is that, if you link the GUILE library with other files
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;;;; to produce an executable, this does not by itself cause the
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;;;; resulting executable to be covered by the GNU General Public License.
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;;;; Your use of that executable is in no way restricted on account of
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;;;; linking the GUILE library code into it.
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;;;;
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;;;; This exception does not however invalidate any other reasons why
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;;;; the executable file might be covered by the GNU General Public License.
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;;;;
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;;;; This exception applies only to the code released by the
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;;;; Free Software Foundation under the name GUILE. If you copy
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;;;; code from other Free Software Foundation releases into a copy of
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;;;; GUILE, as the General Public License permits, the exception does
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;;;; not apply to the code that you add in this way. To avoid misleading
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;;;; anyone as to the status of such modified files, you must delete
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;;;; this exception notice from them.
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;;;;
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;;;; If you write modifications of your own for GUILE, it is your choice
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;;;; whether to permit this exception to apply to your modifications.
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;;;; If you do not wish that, delete this exception notice.
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;;;;
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;;;; A simple value history support
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(define-module (ice-9 history))
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(process-define-module '((value-history)))
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(define (use-value-history x)
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(module-use! (current-module)
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(resolve-module '(value-history))))
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(define save-value-history
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(let ((count 0)
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(history (resolve-module '(value-history))))
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(lambda (v)
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(if (not (unspecified? v))
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(let* ((c (1+ count))
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(s (string->symbol (simple-format #f "$~A" c))))
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(simple-format #t "~A = " s)
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(module-define! history s v)
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(set! count c))))))
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(add-hook! before-eval-hook use-value-history)
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(add-hook! before-print-hook save-value-history)
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