source: trunk/j/src/org/armedbear/lisp/print-unreadable-object.lisp @ 4622

Last change on this file since 4622 was 4622, checked in by piso, 19 years ago

Initial checkin.

File size: 1.3 KB
Line 
1;;; print-unreadable-object.lisp
2;;;
3;;; Copyright (C) 2003 Peter Graves
4;;; $Id: print-unreadable-object.lisp,v 1.1 2003-11-03 03:00:21 piso Exp $
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(defmacro print-unreadable-object ((object stream &key type identity) &body body)
21  `(let ((s ,stream)
22         (obj ,object))
23     (format s "#<")
24     ,(when type
25        '(format s "~S" (type-of obj)))
26     ,(when (and type (or body identity))
27        '(format s " "))
28     ,@body
29     ,(when (and identity body)
30        '(format s " "))
31     ,(when identity
32        '(format s "@ #x~A" (sys::hashcode-to-string obj)))
33     (format s ">")
34     nil))
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