From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Drew Adams Newsgroups: gmane.emacs.bugs Subject: bug#25195: 25.1; Index backslash for escape of left-margin paren Date: Sat, 27 Jul 2019 09:13:25 -0700 (PDT) Message-ID: References: <87a7czk9jk.fsf@mouse.gnus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="120648"; mail-complaints-to="usenet@blaine.gmane.org" Cc: 25195@debbugs.gnu.org To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Jul 27 18:14:09 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hrPKi-000VI5-Mt for geb-bug-gnu-emacs@m.gmane.org; Sat, 27 Jul 2019 18:14:08 +0200 Original-Received: from localhost ([::1]:46476 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hrPKh-0002Ey-0p for geb-bug-gnu-emacs@m.gmane.org; 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Sat, 27 Jul 2019 16:13:29 +0000 Original-Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x6RGD6YF035786; Sat, 27 Jul 2019 16:13:28 GMT Original-Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserp3020.oracle.com with ESMTP id 2u0ee2y6j7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 27 Jul 2019 16:13:28 +0000 Original-Received: from abhmp0012.oracle.com (abhmp0012.oracle.com [141.146.116.18]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x6RGDQP6006003; Sat, 27 Jul 2019 16:13:27 GMT In-Reply-To: <87a7czk9jk.fsf@mouse.gnus.org> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9.1 (1003210) [OL 16.0.4873.0 (x86)] X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9331 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1907270203 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9331 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1907270202 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: 209.51.188.43 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:163891 Archived-At: > > The Emacs manual, node `Left Margin Convention', seems to be the only > > place that the convention of a paren in column 0 is documented. The > > backslash escaping is not indexed however - it should be. >=20 > Hm... Well, it does say that if you have a parent in column 0, then > it's treated specially. If you have >=20 > "bla bla > \(foo bar)" >=20 > then the ( isn't in column zero, and \( =3D> ( in this context. >=20 > So I'm not sure this is even a convention; it's just a work-around. > And what character to use in what language to get a similar effect is > surely language-dependent? >=20 > So I don't think this is something that needs expounding upon; closing. (I should have said mode `Left Margin Paren'. The title of the node is "Left Margin Convention".) I don't understand what you're saying. If you have a paren in column 0 then you need to escape it, to make indentation, movement etc. work well. What's not a convention about that (see the title)? But what difference does it make if you prefer to see it as a workaround. Users need to know about it, which is why we document it. And it's why we font-lock delimiters "that ought to be quoted". ("Ought" is a strong word, showing that this is indeed intended as a convention.) And it's why we have a variable to inhibit the need for such escaping - also documented in this node. And it's not just for a paren - same thing for other delimiters. E.g., in Elisp a (square) bracket.