source: trunk/j/src/org/armedbear/lisp/gentemp.lisp @ 4247

Last change on this file since 4247 was 4247, checked in by piso, 19 years ago

Initial checkin.

File size: 1.2 KB
Line 
1;;; gentemp.lisp
2;;;
3;;; Copyright (C) 2003 Peter Graves
4;;; $Id: gentemp.lisp,v 1.1 2003-10-07 17:21:07 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;;; Adapted from CMUCL.
21
22(in-package "SYSTEM")
23
24(defvar *gentemp-counter* 0)
25
26(defun gentemp (&optional (prefix "T") (package *package*))
27  (require-type prefix 'string)
28  (loop
29    (let ((name (format nil "~A~D" prefix (incf *gentemp-counter*))))
30      (multiple-value-bind (symbol exists-p) (find-symbol name package)
31  (unless exists-p
32          (return (values (intern name package))))))))
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