source: trunk/j/src/org/armedbear/lisp/print-unreadable-object.lisp @ 11297

Last change on this file since 11297 was 11297, checked in by ehuelsmann, 13 years ago

Set Id keyword for expansion.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 1.5 KB
Line 
1;;; print-unreadable-object.lisp
2;;;
3;;; Copyright (C) 2003-2005 Peter Graves
4;;; $Id: print-unreadable-object.lisp 11297 2008-08-31 13:26:45Z ehuelsmann $
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;;; Adapted from SBCL.
21
22(in-package #:system)
23
24(defun %print-unreadable-object (object stream type identity body)
25  (setf stream (out-synonym-of stream))
26  (when *print-readably*
27    (error 'print-not-readable :object object))
28  (format stream "#<")
29  (when type
30    (format stream "~S" (type-of object))
31      (format stream " "))
32  (when body
33    (funcall body))
34  (when identity
35    (when (or body (not type))
36      (format stream " "))
37    (format stream "{~X}" (identity-hash-code object)))
38  (format stream ">")
39  nil)
40
41(defmacro print-unreadable-object ((object stream &key type identity) &body body)
42  `(%print-unreadable-object ,object ,stream ,type ,identity
43           ,(if body
44          `(lambda () ,@body)
45          nil)))
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