From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Kai Ma Newsgroups: gmane.emacs.bugs Subject: bug#60196: 29.0.60; re-builder should read all forms for the rx syntax Date: Fri, 30 Dec 2022 21:45:21 +0800 Message-ID: <82236308-CB69-43CE-BDAA-F405AD98A114@gmail.com> References: <64E4056A-0167-4B41-BB44-60A47C7FA6A5@acm.org> Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.300.101.1.3\)) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="39116"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 60196@debbugs.gnu.org To: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Dec 30 14:46:19 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pBFiE-0009zs-Jl for geb-bug-gnu-emacs@m.gmane-mx.org; 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Fri, 30 Dec 2022 05:45:35 -0800 (PST) In-Reply-To: <64E4056A-0167-4B41-BB44-60A47C7FA6A5@acm.org> X-Mailer: Apple Mail (2.3731.300.101.1.3) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:252115 Archived-At: > On Dec 30, 2022, at 20:28, Mattias Engdeg=C3=A5rd = wrote: >=20 > The handling of rx input in re-builder is indeed unsatisfactory. We = could adopt your proposed solution: >=20 >> Ideally, re-builder should allow users to simply write >>=20 >> "" (group (*? anychar)) "" >=20 > which would be a definite improvement. We could also accept a Lisp = expression that is evaluated, so that you'd write >=20 > (rx "" (group (*? anychar)) "") >=20 > On the surface this looks more verbose, but since re-builder itself = would provide the `(rx )` boilerplate, there wouldn't actually be any = more typing. Good point! And it is much easier to copy a whole Sexpr. > The main advantage would be that regexps could be built up from = smaller pieces: >=20 > (rx-let ((spaces (* " ")) > (identifier (: alpha (* alnum)))) > (rx identifier spaces "->" spaces identifier)) >=20 > Either would be a definite improvement to the current rather strange = re-builder behaviour with respect to rx input. Any preference? I like your proposal better! :-)