From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Kevin Rodgers Newsgroups: gmane.emacs.bugs Subject: bug#8479: 24.0.50; Strange error message upon M-z M-z Date: Wed, 13 Apr 2011 20:05:40 -0600 Message-ID: References: <87bp0clqtz.fsf@fencepost.gnu.org> <82fwpozbgb.fsf@gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1302746850 3583 80.91.229.12 (14 Apr 2011 02:07:30 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 14 Apr 2011 02:07:30 +0000 (UTC) To: bug-gnu-emacs@gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Apr 14 04:07:27 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1QABxu-0003Mk-OY for geb-bug-gnu-emacs@m.gmane.org; Thu, 14 Apr 2011 04:07:26 +0200 Original-Received: from localhost ([::1]:40208 helo=lists2.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QABxu-0006r6-6f for geb-bug-gnu-emacs@m.gmane.org; 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U; Intel Mac OS X 10.4; en-US; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9 In-Reply-To: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Wed, 13 Apr 2011 22:06:01 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:45803 Archived-At: On 4/12/11 12:00 AM, Eli Zaretskii wrote: >> From: Kevin Rodgers >> Date: Mon, 11 Apr 2011 23:15:50 -0600 >> >> Yes, but why is M-z not a character? > > Because the "M-" part sets bits in the area outside the valid range of > character code points. This is what I was looking for, in the Meta-Character Syntax section of the Emacs Lisp manual: A "meta character" is a character typed with the modifier key. The integer that represents such a character has the 2**27 bit set. We use high bits for this and other modifiers to make possible a wide range of basic character codes. In a string, the 2**7 bit attached to an ASCII character indicates a meta character; thus, the meta characters that can fit in a string have codes in the range from 128 to 255, and are the meta versions of the ordinary ASCII characters. *Note Strings of Events::, for details about -handling in strings. -- Kevin Rodgers Denver, Colorado, USA