From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: =?ISO-8859-1?Q?Nordl=F6w?= Newsgroups: gmane.emacs.help Subject: Chained Object Type Predicates Date: Mon, 8 Jun 2009 05:39:58 -0700 (PDT) Organization: http://groups.google.com Message-ID: <80c94ce8-8e0b-4ebe-a575-f1f25a6fd734@n8g2000vbb.googlegroups.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1244465205 29656 80.91.229.12 (8 Jun 2009 12:46:45 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 8 Jun 2009 12:46:45 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Jun 08 14:46:43 2009 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1MDeFL-0004AJ-Ly for geh-help-gnu-emacs@m.gmane.org; Mon, 08 Jun 2009 14:46:39 +0200 Original-Received: from localhost ([127.0.0.1]:47511 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MDeFL-0003lS-8D for geh-help-gnu-emacs@m.gmane.org; Mon, 08 Jun 2009 08:46:39 -0400 Original-Path: news.stanford.edu!headwall.stanford.edu!newsfeed.news2me.com!nx01.iad01.newshosting.com!newshosting.com!69.16.185.16.MISMATCH!npeer02.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!postnews.google.com!n8g2000vbb.googlegroups.com!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 9 Original-NNTP-Posting-Host: 150.227.15.253 Original-X-Trace: posting.google.com 1244464798 11702 127.0.0.1 (8 Jun 2009 12:39:58 GMT) Original-X-Complaints-To: groups-abuse@google.com Original-NNTP-Posting-Date: Mon, 8 Jun 2009 12:39:58 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: n8g2000vbb.googlegroups.com; posting-host=150.227.15.253; posting-account=ytJKAgoAAAA1tg4ScoRszebXiIldA5vg User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux i686; sv-SE; rv:1.9.0.10) Gecko/2009042523 Ubuntu/9.04 (jaunty) Firefox/3.0.10, gzip(gfe), gzip(gfe) X-HTTP-Via: 1.1 ip1-w.foi.se:8080 (IronPort-WSA/5.6.4-015) Original-Xref: news.stanford.edu gnu.emacs.help:169806 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:65034 Archived-At: How should i implement chained type predicate functions, for example (defun list-of-numbers-p (object) (and (listp object) ...)) should return t if object is of type list (listp) and its elements in turn all are of type string (stringp) otherwise nil. Thanks in advance, Per Nordl=F6w