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#61281: =?UTF-8?Q?=E2=80=9C`?=(a \, b)=?UTF-8?Q?=E2=80=9D?= equals to =?UTF-8?Q?=E2=80=9C`?=(a . , b)=?UTF-8?Q?=E2=80=9D?= Date: Mon, 06 Feb 2023 04:03:18 +0100 Message-ID: <87ttzzsdft.fsf@web.de> References: <87a61tgdkx.fsf@web.de> <875ycghgv1.fsf@web.de> <871qn4hfte.fsf@web.de> <87fsbju0of.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="22582"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: Xie Shynur , "61281@debbugs.gnu.org" <61281@debbugs.gnu.org> To: Drew Adams Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Feb 06 04:04:19 2023 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 1pOrnm-0005d7-UW for geb-bug-gnu-emacs@m.gmane-mx.org; 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Mon, 06 Feb 2023 04:03:19 +0100 In-Reply-To: (Drew Adams's message of "Mon, 6 Feb 2023 02:26:47 +0000") X-Provags-ID: V03:K1:WjV3Lqrz3eZAdZU1W4o5a8k1SiGmjmrnnfD6tUu6bVlYFPh1XOd EHJpBkooZ0M8D6xbBQ49NVNhqjUuBvsG7HQAvSfauvf7GsJCB41DeKPKUZtpJ0918yzjKwS dcBUEO/JcapRU3Eoo2XXqnc54Np7DtGCyZzN04nQMVeD0/NDVzZQmJkfowbSCd66h4YcByO +uxVvAsIhfoZZRh51GCUg== UI-OutboundReport: notjunk:1;M01:P0:UoaITIQQhWU=;ZxbxL9g5QLeJAmeTSGlcdnd3mre y5ioKcOUziE6xH8N+dvtYDVmNRhUdHmjjEa7/rYfqJ2AcZ2wXbltQrLXxURd3APyLqxYAuoeu BvZcOEzC01JpMPxSipRKZS9AK4c2iuPmYhAK7T5pkX2QkfUPZt1DWjhq/K3eoVvjnCKTPFTcE FaX//HmBvCIhT7KtJOMhsUAHbINotPvbsIhNTub142AxIC44o6Nks98ACPMLf2PxRefdvCqSa Nc2GWhbflC3Lw/wFdWrHADAXXSXOWoQufJAX8DlFxAc+dYx6fngvyohMj0kHaPLKTsbIxQRfF vcAbwuPPpE/CxUdjAlpZ2GgElyOkI8if4UmRkXJdl55ZMvGERLmIxx6+WSTKYlMhzzGJ+pObg cdNXag+ADgaqiCdWz4VxDu9ERboHGRzSF+G06xPkqSbR3/ymLu6QRn1UocvHBvt8cqJLzwwwH tPr2wTyAZihG1kceB7yfs81SDVzhwsE7QYeu9oz1Idlbm4hB2FoUozpXcxEBKmFUjLML9v+iE 3wKGNIDmJCYU6hV2AD7ifZfYEVx4U10Vd6zcPw8QrEDguMQxdUPkU1gmv11fLr/eeB3AYKKeB JVXTfrhC4q4rzrSBsB4FOCDDlvXq/gOC2a5xA2PxOH1CH5PoTqTLAlpMJ7VtlK4REUBa6ey8B k3bYIhjuY+Igaeo6+FzX4GbapeHfl/Q+pd8Wg+CBQvCfjW83FgggRg1+FqrDz7lhFalQ2qlHN DCUei/xPU2a15oDz7pybxj4Zbdj4jS6cSFq6zZgEdvEaoNHZ9LU/ru1VvIpXrKypmxnWB7JT 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:254924 Archived-At: Drew Adams writes: > And the question is about "\,", not ",". > > (setq ,X 42) ; => 42 > (setq \,X 42) ; => (wrong-type-argument symbolp (\, X)) The other way round. "\,X" is interpreted as symbol, just as "\,". What's the question about "\,"? > (I'd be interested in what the case is in Common > Lisp, including what a typical implementation is.) AFAIU, there are different implementations. I tested two random CL and two random scheme interpreters. Of those 4, 3 expanded ,X --> (unquote X), and in one case ,X was read as an atomic expression. > The question is whether \, and , should have the > same behavior. Certainly \z and z have the same > behavior. But character z has no special behavior > inside a backquote. I think the necessity to escape the comma to get the symbol has been introduced to avoid ambiguities with uses of the reader macro. > \@ and @ don't have the same behavior inside a > backquote. And neither do \. and . -- only \, > and , have the same behavior. To me, that's just > an implementation/design thing, not something > normal or inevitable. Not a big deal, not the > end of the world. I minor unfortunate thing > (gotcha). In any case, much too late to change it. > I pointed to the comments in the code. They tell the story. But I > don't think there's any such explanation/description in the doc. Yes, it would be good to add something. Michael.