From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: [PATCH v3] Allow applying filters to summary consecutively Date: Fri, 11 Nov 2022 20:19:21 +0200 Message-ID: <838rkhpd5i.fsf@gnu.org> References: <874jvaont2.fsf@autistici.org> <83r0ybs07r.fsf@gnu.org> <83r0y9q5j1.fsf@gnu.org> <9aa7db1076472a25a239@heytings.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32580"; mail-complaints-to="usenet@ciao.gmane.io" Cc: rms@gnu.org, andrea.monaco@autistici.org, rpluim@gmail.com, emacs-devel@gnu.org To: Gregory Heytings Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Nov 11 19:20:11 2022 Return-path: Envelope-to: ged-emacs-devel@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 1otYdO-0008Gr-JO for ged-emacs-devel@m.gmane-mx.org; Fri, 11 Nov 2022 19:20:10 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1otYcf-0005uH-G1; Fri, 11 Nov 2022 13:19:25 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1otYcd-0005u4-M3 for emacs-devel@gnu.org; Fri, 11 Nov 2022 13:19:23 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1otYca-0003cJ-1Z; Fri, 11 Nov 2022 13:19:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=IFh49oeFy+G4HCvEGC7o96nHfMTb3ITi4R5L1Uhs+y8=; b=p4Yx655W03IV X1en+Oy9SRFx/KHfm5cvjd0BYLrnofPF906q4279a9F113kcGvYtGMtY/qcduTGOk60G1qXk2PJPF agDJojRDu00sbrV7sfeB5l7aB4x165dRiUy4rXglvm+7odK38iEAhUtI1JfJ103qfn5anL1/os/Fp fhR2fIFyQn9zCxiRVgwK5FXdMyAyXshom25+PGo8PHbzGJ82GM1kXJqiOkHWTJu4Fu8xwshhKgGnR Gmvg1q29hhypmL/nAW+ePSblSpIOfoXuPHdinNl3JRW6UnPVIlgzeCvALb0Z31MDlIs1iZmP1bF91 D90NAMHHQvxs4lXN1PkGzQ==; Original-Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1otYcZ-0003b3-6H; Fri, 11 Nov 2022 13:19:19 -0500 In-Reply-To: <9aa7db1076472a25a239@heytings.org> (message from Gregory Heytings on Fri, 11 Nov 2022 18:00:06 +0000) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:299580 Archived-At: > Date: Fri, 11 Nov 2022 18:00:06 +0000 > From: Gregory Heytings > cc: rms@gnu.org, andrea.monaco@autistici.org, rpluim@gmail.com, > emacs-devel@gnu.org > > > That's okay, thanks. But it's only the beginning of my problem. How do > > you describe the effect of applying a filter on top of one or more other > > filters? Andrea wants to use "intersection", but I tend to think this > > is too "mathematical" and too vague to explain clearly what happens. > > What would be a good terminology for that? > > I think there are two possibilities when adding another filter: either > broadening the already existing filtering ("union" in mathematical terms) > or narrowing the already existing filtering ("intersection" in > mathematical terms). It's what you call "intersection", obviously.