From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: John Shahid Newsgroups: gmane.emacs.help Subject: Re: What is the use of "categories"? Date: Wed, 29 Aug 2018 22:47:02 -0400 Message-ID: <87a7p4r2op.fsf@gmail.com> References: <877ekdmyfw.fsf@mbork.pl> <83zhx95hnj.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1535597133 16729 195.159.176.226 (30 Aug 2018 02:45:33 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 30 Aug 2018 02:45:33 +0000 (UTC) User-Agent: mu4e 1.1.0; emacs 27.0.50 Cc: help-gnu-emacs@gnu.org To: Eli Zaretskii Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Aug 30 04:45:29 2018 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fvCxb-0004DM-IG for geh-help-gnu-emacs@m.gmane.org; Thu, 30 Aug 2018 04:45:27 +0200 Original-Received: from localhost ([::1]:46600 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fvCzg-0002S8-Bq for geh-help-gnu-emacs@m.gmane.org; Wed, 29 Aug 2018 22:47:36 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:59902) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fvCzF-0002RH-1Y for help-gnu-emacs@gnu.org; Wed, 29 Aug 2018 22:47:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fvCzB-00033n-1R for help-gnu-emacs@gnu.org; Wed, 29 Aug 2018 22:47:08 -0400 Original-Received: from mail-qt0-x229.google.com ([2607:f8b0:400d:c0d::229]:39308) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fvCzA-00033Y-SI; Wed, 29 Aug 2018 22:47:04 -0400 Original-Received: by mail-qt0-x229.google.com with SMTP id o15-v6so8217842qtk.6; Wed, 29 Aug 2018 19:47:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=references:user-agent:from:to:cc:subject:in-reply-to:date :message-id:mime-version; bh=HgvmJBYW7cGNPyz3xkMhlYOmcePfaVffYL60y9+scUo=; b=qcDVqizZV7amZiF+gmhGNlneMRyBCJrqizOWdyUrvIqkG3TkR1DkRPuMEReYTCgysA 42Z8f89oeYCiIaQafYniNRqjFekrNISJ4eUfeVnb19diCgc/pCNgZXZ6G3nWlFsDPmwS tsZglinSsGLGLhkNpfhEmR3AaAj7BiW0IFx7DEXhFcVhZ3KIj76mW7PP9DfLqy8m6O2O DvKK6eyctHI6oUAxB3uYc6r3Pxn8EAxpKOIYrz/sp3xRnfE4uE+7C3Mqwo5B0UCeWErs Oo88MZjZGbRJsGogTvsvskl2CIceJ3DTJ4WBcXifhmErLB9xsAmHqNM/+p+w2VkYVG6c uDFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:references:user-agent:from:to:cc:subject :in-reply-to:date:message-id:mime-version; bh=HgvmJBYW7cGNPyz3xkMhlYOmcePfaVffYL60y9+scUo=; b=HjMd6aAqqqhDdRU2HhaNKA1S4mLFXLVddxg9hXA5eUJ6iX7Bo2WWuh+UOMDxqtrJ0x MBUxo1QA0cqhkryzU5TVRJBnQgjHIGE80TRB4aWThFetoPkARNjASj+/nthvtESWp1Hl gK3kYu/5uTKYUMcInXyDvaZUMjRKCqPLp1H+mOEc4e/YMK2u5rh6FmUe/BDzAK209gdM tCHCUY3a1eNlsUKmB20AWpUGE1mm71YOdiLsZxSaAhvZJ1kiVlrB7O79j5SXG+L9o85k nskq3eylJeMsBaQcEkUZq+HPo0A6b22vCT0VjmCjXwvqOCI5KYIUAEdndMO1iKONgeks S1pQ== X-Gm-Message-State: APzg51CgYfem/b5AmBN2tXmju83zP8gC8crhdIwmM+oQ6zT2ngiFlM5l 3HwxUOjtVJ4YlSURSekLzkqYbLnG X-Google-Smtp-Source: ANB0VdbE3HS5bIuuuX3z2wZWzEgjsH+fZwkGXNbK7GdOwChae1M1l/sdlZv/P+vO9/a7lNeiAFfX5w== X-Received: by 2002:ac8:3a05:: with SMTP id w5-v6mr9612882qte.142.1535597224030; Wed, 29 Aug 2018 19:47:04 -0700 (PDT) Original-Received: from amun (cpe-104-162-86-217.nyc.res.rr.com. [104.162.86.217]) by smtp.gmail.com with ESMTPSA id 187-v6sm3416990qki.19.2018.08.29.19.47.03 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 29 Aug 2018 19:47:03 -0700 (PDT) In-reply-to: <83zhx95hnj.fsf@gnu.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400d:c0d::229 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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 Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:117798 Archived-At: Eli Zaretskii writes: >> From: Marcin Borkowski >> Date: Sun, 26 Aug 2018 08:30:59 +0200 >> >> I found out about "categories" today - see (info "(elisp) Categories"). >> What is the use of them? I noticed that filling functions use them >> (which makes sense), is there anything else in stock Emacs or packages >> that does? > > You can use categories in regular expressions, via the \c escape. > This could allow you, for example, to find Katakana characters, or > characters that are consonants. Should the Elisp manual be updated to link to `Emacs (Regexp Backslack)' ?