source: trunk/j/src/org/armedbear/lisp/with-accessors.lisp @ 9266

Last change on this file since 9266 was 4564, checked in by piso, 18 years ago

Initial checkin.

File size: 1.3 KB
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1;;; with-accessors.lisp
2;;;
3;;; Copyright (C) 2003 Peter Graves
4;;; $Id: with-accessors.lisp,v 1.1 2003-10-28 23:44:59 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;;; From SBCL.
21
22(defmacro with-accessors (slots instance &body body)
23  (let ((in (gensym)))
24    `(let ((,in ,instance))
25       (symbol-macrolet
26        ,(mapcar (lambda (slot-entry)
27                   (let ((variable-name (car slot-entry))
28                         (accessor-name (cadr slot-entry)))
29                     `(,variable-name
30                       (,accessor-name ,in))))
31                 slots)
32        ,@body))))
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