source: trunk/abcl/src/org/armedbear/lisp/check-type.lisp @ 14207

Last change on this file since 14207 was 11391, checked in by vvoutilainen, 12 years ago

ABCL license is GPL + Classpath exception. This was intended
by Peter Graves, the original author. For reference, see
http://sourceforge.net/mailarchive/forum.php?thread_name=20040721115302.839%40prufrock&forum_name=armedbear-j-announce

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.8 KB
Line 
1;;; check-type.lisp
2;;;
3;;; Copyright (C) 2003-2005 Peter Graves
4;;; $Id: check-type.lisp 11391 2008-11-15 22:38:34Z vvoutilainen $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19;;;
20;;; As a special exception, the copyright holders of this library give you
21;;; permission to link this library with independent modules to produce an
22;;; executable, regardless of the license terms of these independent
23;;; modules, and to copy and distribute the resulting executable under
24;;; terms of your choice, provided that you also meet, for each linked
25;;; independent module, the terms and conditions of the license of that
26;;; module.  An independent module is a module which is not derived from
27;;; or based on this library.  If you modify this library, you may extend
28;;; this exception to your version of the library, but you are not
29;;; obligated to do so.  If you do not wish to do so, delete this
30;;; exception statement from your version.
31
32;;; Adapted from CMUCL.
33
34(in-package #:system)
35
36(defmacro check-type (place type &optional type-string)
37  (let ((place-value (gensym)))
38    `(loop
39       (let ((,place-value ,place))
40         (when (typep ,place-value ',type)
41           (return nil))
42         (setf ,place
43               (check-type-error ',place ,place-value ',type ,type-string))))))
44
45(defun check-type-error (place place-value type type-string)
46  (let ((cond (if type-string
47                  (make-condition 'simple-type-error
48                                  :datum place-value :expected-type type
49                                  :format-control
50                                  "The value of ~S is ~S, which is not ~A."
51                                  :format-arguments
52                                  (list place place-value type-string))
53      (make-condition 'simple-type-error
54          :datum place-value :expected-type type
55          :format-control
56                                  "The value of ~S is ~S, which is not of type ~S."
57          :format-arguments
58          (list place place-value type)))))
59    (restart-case (error cond)
60      (store-value (value)
61        :report (lambda (stream)
62                  (format stream "Supply a new value for ~S."
63                          place))
64        :interactive read-evaluated-form
65        value))))
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