From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#46274: 28.0.50; Inconsistent doc for syntax-propertize-function Date: Thu, 04 Feb 2021 11:23:16 -0500 Message-ID: References: <871rdwgrjw.fsf@gnus.org> Mime-Version: 1.0 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="38012"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: 46274@debbugs.gnu.org To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Feb 04 17:33:10 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 1l7hZ7-0009lN-M0 for geb-bug-gnu-emacs@m.gmane-mx.org; 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Thu, 04 Feb 2021 16:24:01 +0000 Original-Received: (at 46274) by debbugs.gnu.org; 4 Feb 2021 16:23:29 +0000 Original-Received: from localhost ([127.0.0.1]:42110 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1l7hPl-0006FG-AL for submit@debbugs.gnu.org; Thu, 04 Feb 2021 11:23:29 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:20788) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1l7hPh-0006F2-Qk for 46274@debbugs.gnu.org; Thu, 04 Feb 2021 11:23:28 -0500 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 57066100707; Thu, 4 Feb 2021 11:23:20 -0500 (EST) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 1733910005D; Thu, 4 Feb 2021 11:23:18 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1612455798; bh=JNF/heVsI5RcZ/rJbu46j4oqsBIQ3Wxh1SNxeRnAt4k=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=jcCJdieYBXuwz0MY5MIQjYeDqyUk/tZjl4K63+1IMTfoy2gsdchpzGCuiLqApCmjo dpli08PnVZw8c5WPp6iPy/OCfqlD9gCu1/YQ4Rn1hV27U1qD9/DUAqxA+gY8sYYlcp Q5LxlxDoe2ttlcdg7XU9MzX80kWAGfNnnTtXuSPeFqAgRMX7Yph7/+3yPz3R1H++af NUKAdFMialj7rTX7CKMEC9LilkQkTB3v25lZipudkVSomcR45O3JNmPrzR4OO90Y1W ZW+zb0xaiI+fqGBrHke0Y6RjuPKCxjytG0SCjPSg/2DPiFuyDi3wnViiyQetVshEfz dcrt8c5kq//+A== Original-Received: from alfajor (76-10-182-85.dsl.teksavvy.com [76.10.182.85]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id A674D1204AE; Thu, 4 Feb 2021 11:23:17 -0500 (EST) In-Reply-To: <871rdwgrjw.fsf@gnus.org> (Lars Ingebrigtsen's message of "Thu, 04 Feb 2021 09:34:11 +0100") 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:199308 Archived-At: >> C-h v syntax-propertize-function contains this text: >> >> The specified function may call `syntax-ppss' on any position >> before END, but if it calls `syntax-ppss' on some >> position and later modifies the buffer on some earlier position, >> then it is its responsibility to call `syntax-ppss-flush-cache' to flush >> the now obsolete ppss info from the cache. >> >> But (info "(elisp) Syntax Properties") has a different view: >> >> It is allowed to call =E2=80=98syntax-ppss=E2=80=99 on any position befo= re END. >> However, it should not call =E2=80=98syntax-ppss-flush-cache=E2=80=99; s= o, it is not >> allowed to call =E2=80=98syntax-ppss=E2=80=99 on some position and later= modify the >> buffer at an earlier position. >> >> Which is the right one? > > Good question. Stefan M added to the CCs. Great question. Thanks for asking. Stefan