From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: waterloo Newsgroups: gmane.emacs.help Subject: about meta character and character coding . Date: Thu, 6 Aug 2009 14:57:20 +0800 Message-ID: <907065090908052357t47504cd7t9c47e64a5f4ebac0@mail.gmail.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=0022152d65418915e8047073a14a X-Trace: ger.gmane.org 1249541884 26347 80.91.229.12 (6 Aug 2009 06:58:04 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 6 Aug 2009 06:58:04 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Aug 06 08:57:57 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 1MYwvB-0007C6-H7 for geh-help-gnu-emacs@m.gmane.org; Thu, 06 Aug 2009 08:57:53 +0200 Original-Received: from localhost ([127.0.0.1]:47492 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MYwvB-00074P-2z for geh-help-gnu-emacs@m.gmane.org; Thu, 06 Aug 2009 02:57:53 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MYwun-00072v-8h for help-gnu-emacs@gnu.org; Thu, 06 Aug 2009 02:57:29 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MYwuh-00072Q-CR for help-gnu-emacs@gnu.org; Thu, 06 Aug 2009 02:57:28 -0400 Original-Received: from [199.232.76.173] (port=58968 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MYwuh-00072N-7v for help-gnu-emacs@gnu.org; Thu, 06 Aug 2009 02:57:23 -0400 Original-Received: from mx20.gnu.org ([199.232.41.8]:39714) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MYwug-0000SS-Ik for help-gnu-emacs@gnu.org; Thu, 06 Aug 2009 02:57:22 -0400 Original-Received: from mail-gx0-f219.google.com ([209.85.217.219]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1MYwuf-0006wR-J4 for help-gnu-emacs@gnu.org; Thu, 06 Aug 2009 02:57:21 -0400 Original-Received: by gxk19 with SMTP id 19so852451gxk.18 for ; Wed, 05 Aug 2009 23:57:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=PuJzs7JqZ9vldmcgffb3SIMOMeX0JIFb3ncVCEwLeHc=; b=X5+6gXFG7aVeYFL/jVs8qdyMnvJ+G4ejuNRR6JZsZ6AyVdgbLWkzhHFCYfsIStkG+F RWOghFEpk//9jk7vBiF/jsJsbHHt8ql6lF53LK67+sytXw4SDPtzpeFGICQYHWAliV4K rJXLE3FJqsFYbKOJ0KsSgF3/FA/dFR6DmnHKw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=cZ/PH+Q5N+AtWCi814gRM/bu5QxqWV3VPi/U/EDIkgL4Bv6PWZ/9My/yu9x95j8XvL NTWZY+f8nz3matibpcV4az9S38usvAQL3mmdPXg5vvwNvKR2SnF7IJ1rMSgky1QuMaMv thRpQmwqcOHmv8dxBWLBRCezeSesLmZZFccPk= Original-Received: by 10.231.11.135 with SMTP id t7mr3279835ibt.12.1249541840507; Wed, 05 Aug 2009 23:57:20 -0700 (PDT) X-Detected-Operating-System: by mx20.gnu.org: GNU/Linux 2.6 (newer, 2) X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6, seldom 2.4 (older, 4) 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:66833 Archived-At: --0022152d65418915e8047073a14a Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit I can not understand the following para in Emacs Lisp Reference : 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. (In Emacs versions 18 and older, this > convention was used for characters outside of strings as well.) One bit has two states. Does 2**7 bit denote 7 bits ? What does `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. ' mean ? Thanks --0022152d65418915e8047073a14a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I can not understand the following para in Emacs Lisp Reference :

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
ord= inary ASCII characters.=A0 (In Emacs versions 18 and older, this
convent= ion was used for characters outside of strings as well.)

One bit has two states.
Does 2**7 bit denote 7 bits ?

W= hat does `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. ' mean ?

Thanks
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