source: trunk/abcl/src/org/armedbear/lisp/adjoin.lisp @ 11695

Last change on this file since 11695 was 11695, checked in by ehuelsmann, 14 years ago

Fix DESCRIBE output by registering documentation on functions.

Patch by: Russell McManus? (russel_mcmanus@…)
Tweaked by: me

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.0 KB
1;;; adjoin.lisp
3;;; Copyright (C) 2003 Peter Graves
4;;; $Id: adjoin.lisp 11695 2009-03-03 22:10:25Z ehuelsmann $
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.
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14;;; GNU General Public License for more details.
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.
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.
32(defun adjoin (item list &key key (test #'eql testp) (test-not nil notp))
33  "Add `item' to `list' unless it is already a member (as determined by
34the test function `test'."
35  (when (and testp notp)
36    (error "test and test-not both supplied"))
37  (if (let ((key-val (sys::apply-key key item)))
38  (if notp
39      (member key-val list :test-not test-not :key key)
40      (member key-val list :test test :key key)))
41      list
42      (cons item list)))
Note: See TracBrowser for help on using the repository browser.