From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: What does the coding system nil mean? Date: 26 Jan 2004 08:08:25 +0200 Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Message-ID: References: Reply-To: Eli Zaretskii NNTP-Posting-Host: deer.gmane.org X-Trace: sea.gmane.org 1075097364 20018 80.91.224.253 (26 Jan 2004 06:09:24 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Mon, 26 Jan 2004 06:09:24 +0000 (UTC) Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Jan 26 07:09:21 2004 Return-path: Original-Received: from monty-python.gnu.org ([199.232.76.173]) by deer.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 1Akzw0-0004id-00 for ; Mon, 26 Jan 2004 07:09:21 +0100 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.24) id 1AkzuK-0000CW-Uk for geh-help-gnu-emacs@m.gmane.org; Mon, 26 Jan 2004 01:07:36 -0500 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.24) id 1Akzu1-0000Aa-Di for help-gnu-emacs@gnu.org; Mon, 26 Jan 2004 01:07:17 -0500 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.24) id 1AkztV-00006F-TM for help-gnu-emacs@gnu.org; Mon, 26 Jan 2004 01:07:16 -0500 Original-Received: from [207.232.27.5] (helo=WST0054) by monty-python.gnu.org with asmtp (Exim 4.24) id 1AkztU-00006C-TF for help-gnu-emacs@gnu.org; Mon, 26 Jan 2004 01:06:45 -0500 Original-To: help-gnu-emacs@gnu.org In-reply-to: (message from Jesper Harder on Sun, 25 Jan 2004 22:09:15 +0100) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.2 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: main.gmane.org gmane.emacs.help:16357 X-Report-Spam: http://spam.gmane.org/gmane.emacs.help:16357 > Newsgroups: gnu.emacs.help > From: Jesper Harder > Date: Sun, 25 Jan 2004 22:09:15 +0100 > > Then nil isn't really a coding system, but just a value that some > coding system related functions happen to interpret in a certain way. It's a coding system in the sense that every primitive that accepts a coding system symbol also accepts nil. > Though, I think it's a bit odd for a predicate called > `coding-system-p' to return t for an object that is _not_ in fact a > coding system. IMHO, it's no more odd than this: M-: (listp nil) RET => t