From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.devel Subject: Re: pcase: Semantics of atom QPATS Date: Mon, 11 Jun 2018 22:53:58 +0200 Message-ID: <87a7s111uh.fsf@web.de> References: <87tvqbjwyf.fsf@web.de> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1528750599 16264 195.159.176.226 (11 Jun 2018 20:56:39 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 11 Jun 2018 20:56:39 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Mon Jun 11 22:56:35 2018 Return-path: Envelope-to: ged-emacs-devel@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 1fSTrf-000494-AY for ged-emacs-devel@m.gmane.org; Mon, 11 Jun 2018 22:56:35 +0200 Original-Received: from localhost ([::1]:51323 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fSTtm-00079q-Dl for ged-emacs-devel@m.gmane.org; Mon, 11 Jun 2018 16:58:46 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:44279) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fSTpb-0003WL-Qi for emacs-devel@gnu.org; Mon, 11 Jun 2018 16:54:28 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fSTpX-0001QY-0I for emacs-devel@gnu.org; Mon, 11 Jun 2018 16:54:27 -0400 Original-Received: from mout.web.de ([212.227.17.12]:47585) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fSTpW-0001Py-Lp for emacs-devel@gnu.org; Mon, 11 Jun 2018 16:54:22 -0400 Original-Received: from drachen.dragon ([188.110.196.170]) by smtp.web.de (mrweb102 [213.165.67.124]) with ESMTPSA (Nemesis) id 0M2uWg-1gHQYI0DEk-00shzE; Mon, 11 Jun 2018 22:54:00 +0200 In-Reply-To: (Stefan Monnier's message of "Mon, 11 Jun 2018 10:09:37 -0400") X-Provags-ID: V03:K1:unfnadyQyHpefZa+ej3z5l+a5ifiABObDLv3HndmrPNaDWcH2wT 1fDh+PgmY6mprhKY6rBNJNOry+Ze0FRKYAw1yGKPKYaWPh4ir6g7Q+RRieCLjtZP0DrOquf /gllxpdQobBEI6dwWER5DpcNTkM0DBEuVZHfn3BM8mEIlFt1hNhKhdfVYOPcHMwyaqUDJBf 8tLseVDYQrx6t0Fxjb6Fg== X-UI-Out-Filterresults: notjunk:1;V01:K0:FNHIL6+vEfs=:U9ytKjoDHW7aWMnw6Jh9Xa eI6k6S23pz2Kq9rf1udVtpl9Q8mKlDR6vHD9JfUWxdBkoxcUmHS21GXxlkwvomEsGVLlaN1Ov Y8ttRVKqjTbNsrFwnDGbRO1EOzN0onuoZPkRYj8gQRl2L/jchU8c1SVf3aFGiXFKNOkBg5m3Y Ck2pQ8DK1McjBpraeULKaBNvLv6zMN/JHLwESFsX24BTc/KQ0l8uPbNLctKwpy8vjDdvtAKi6 DyuZKjFB5/w0n+VZV7FpTxtNIJgOIKT59inXKLWNwUh7yNImu8vXJY8PhlE4Jg2ISK0QRoLJj tbvEfFpURH8eOWN4FClHLxziXEEFAk/SqoWuVCGhxmdk+9UjPoC6gHe8rcED7iJYNytnZQSSs 7Nzry7/QNSxPUTHUCtwNlIPgy3ovcH7cWYSq1+W3vJtBF40uBYyph5Q5dRnL0ovKF98PC9D7G QoS77Kc7pI7eoBV4O2IenIKIhdxxeAjSjFP/gA4L+M0ib9cHz9+3SDwoLSkAtjsWXWZxXK63C ZJzPXLNYlqB6y9lEaAjEAwHGtw9kJTHNFetVeDIOVGKtHuOpU6yYGuDyc81nVPPl2I0L79pEw us4cFTwZ62O7/C08Qnj49t1ZN7sWLLIUX9jKJ7dc6yTEAONRZeNIHC03WXS33k61iwT4jBYXT DT8k75r71knzn0w+zI7SvIC4if5VsNwKRQWkDMuTkkhebitYgrZbY9eR/5JrhzmzWSIJpMU4q QHQLW0ErMFxLZCaSws1HzVNA49b0wN06N5Mt68WdhzZ2UKQF4rqPlPgCh77QVUmQlf2v+zBH X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 212.227.17.12 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:226238 Archived-At: Stefan Monnier writes: > [ It's an `equal` test we want, not `eq`. ] Of course - that was a typo. > The issue is rather that not all types might want an `equal` test. > E.g. we could accept patterns like > > `#s(hash-table (data ,key1 ,val1)) > > Which is why I prefer signaling an error: it lets us extend the > semantics of ` without any fear of breaking backward compatibility. Ah, makes sense. Thanks, Michael.