From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: npostavs@users.sourceforge.net Newsgroups: gmane.emacs.bugs Subject: bug#5700: emacs-23 and 8-bit characters in 128..255 Date: Wed, 06 Jul 2016 19:52:16 -0400 Message-ID: <87h9c2cojz.fsf@users.sourceforge.net> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1467849207 21669 80.91.229.3 (6 Jul 2016 23:53:27 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 6 Jul 2016 23:53:27 +0000 (UTC) Cc: "Nelson H. F. 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[206.188.64.44]) by smtp.googlemail.com with ESMTPSA id l187sm1829756ite.22.2016.07.06.16.52.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 06 Jul 2016 16:52:07 -0700 (PDT) In-Reply-To: (Stefan Monnier's message of "Tue, 09 Mar 2010 17:02:14 -0500") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.93 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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" Xref: news.gmane.org gmane.emacs.bugs:120544 Archived-At: tags 5700 notabug quit With Emacs 24/25, using "\u00FF" works: (string-equal (buffer-substring (point) (1+ (point))) "\u00FF") (looking-at "\u00FF") Seems to be another instance of the unibyte vs multibyte string escape synt= ax thing: You can also use hexadecimal escape sequences (=E2=80=98\xN=E2=80=99= ) and octal escape sequences (=E2=80=98\N=E2=80=99) in string constants. *But bewa= re:* If a string constant contains hexadecimal or octal escape sequences, and these escape sequences all specify unibyte characters (i.e., less than 256), and there are no other literal non-ASCII characters or Unicode-style escape sequences in the string, then Emacs automatically assumes that it is a unibyte string. That is to say, it assumes that all non-ASCII characters occurring in the string are 8-bit raw bytes. Stefan Monnier writes: > which seems acceptable, whereas under Emacs-23 we have: > [...] > (multibyte-string-p "\377") prints as "\377" In 23.4 it returns returns nil