From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.bugs Subject: bug#50136: 28.0.50; A problem with rx-let expansion Date: Fri, 20 Aug 2021 16:50:01 +0200 Message-ID: <8735r4jhly.fsf@web.de> References: <878s0wcj3j.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33549"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Mattias =?UTF-8?Q?Engdeg=C3=A5rd?= , Stefan Monnier To: 50136@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Aug 20 16:51:17 2021 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 1mH5rZ-0008Vn-5p for geb-bug-gnu-emacs@m.gmane-mx.org; 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Fri, 20 Aug 2021 16:50:02 +0200 In-Reply-To: <878s0wcj3j.fsf@web.de> (Michael Heerdegen's message of "Fri, 20 Aug 2021 15:59:44 +0200") X-Provags-ID: V03:K1:1NULzQdii5CZUA07OMTQu9+q06DOAauZuSE5NUBKwEqbmEFAcVT EvRgU5IMrusZUG+DXDEgMD7dAkJw0Epy3R6T/+pLf3pnp399nS9kdA3pJ8Z3fJkE4sfkBox fxcP6ugEgXSpKi1F014Ov9AdtW+F4HjZfahFVwpwMK0G295w1vDEolT568dRplQbeoFNiU2 11OKl+DW3di+r1Jsn67SQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:pnWTLsKKs7w=:9xxmxLK1K9EYhyQ4x1m2eL 6SeDvx7mgKrI55D+LYkTauuGkpTOoWpmdO3MDskVjnXyT2C+rjLKRYMC3IiR3LuwfHxBeQFZN m8/hzwtr5dXjKGKj0jVy4F2utk3f3Lq0UTxaehIRNHwDOEXYp9LjjhkSPkwlDg5VyHy7D3crT 6YaxiO5EU+5rbkYVwIme1DxOZXGLmxHrLG+/j0dcIVf1zjnMcfXm4spvbeYN2rD3qFAd82eLa kn0mkvuqpgeh35pjfsBUPhutAsQlmh3Rg2mpyN2jzOAUsQ/y2D+WOFcVy4imwZE/6pvD0oTl3 W1hY+vp2a7QymvpNtR78B26SFxY9KNFPG9AzLePQGcmgz+ZxtswoKNUhX0nOkUMDO3R8cWriS ekRrnGrwP+kjt16mOvZM3rtV/WhEb2hxm2OyNT6QeUGNHr1LeQ5EZNecV/E9wffZl/8ueoERk 3OLwDLwGzfRDZdseO71VlSJ9+C2awC/908wd+2NZIEuh2x4yOVTW3cJdBQNa0h1pQxv7NfqRV Rxl+xiTX00djezKwOLwojpouKKsoCBtRVyNEpAQxkuowak3qZlaRfIblmoNfKuJ1Z8TagxUSH obQ8skrcGji59826yj8sCLsjtLC8Q6bVzAv/FdHpzJuATcojQjn/kNxoSzKJRIc0kGlSCymL5 CkyXs+iOlrKuhe2rJxmoLBhLOZd5OgbMQbXdBWcd+YxqyHV+UTt2FOHXmAlUCHVKvE8n17y7Y E4Gu5pUoXDE7ZK5vAdl6ZD3L3FDFgjZasM/S4vQ1GKDssCfRven/1TbnLNFpf8VxFvrs1dX7 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" Xref: news.gmane.io gmane.emacs.bugs:212281 Archived-At: Michael Heerdegen writes: > #+begin_src emacs-lisp > (rx-let ((scatter (s) (regex (mapconcat #'string (string-to-list s) ".*")))) > (rx (scatter "abc"))) ==> "a.*b.*c" > #+end_src AFAIU, the current approach doesn't allow to extend this with an optional CHARS argument to specify with chars are allowed "in between" (instead of "any"). The "&optional" keyword makes it barf. And I can't actually "look" at the arguments to provide a conditional replacement. All I can do is to use `regex' to eval a constant expression I specify (at run-time). This seems a quite limiting approach. Something more macro-like would be appropriate IMO. Michael.