From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: LdBeth Newsgroups: gmane.emacs.devel Subject: Re: using finalizers Date: Fri, 31 Dec 2021 12:43:06 +0800 Message-ID: References: <878rw1pvcw.fsf@logand.com> Mime-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="33160"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.2 (x86_64-apple-darwin18.7.0) MULE/6.0 (HANACHIRUSATO) Cc: LdBeth , Tomas Hlavaty , emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Fri Dec 31 05:45:19 2021 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 1n39n2-0008J5-86 for ged-emacs-devel@m.gmane-mx.org; Fri, 31 Dec 2021 05:45:17 +0100 Original-Received: from localhost ([::1]:36710 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1n39n0-0007Iv-MU for ged-emacs-devel@m.gmane-mx.org; Thu, 30 Dec 2021 23:45:14 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:51670) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n39mN-0006aw-5Z for emacs-devel@gnu.org; Thu, 30 Dec 2021 23:44:35 -0500 Original-Received: from out203-205-251-60.mail.qq.com ([203.205.251.60]:35302) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1n39mH-0006FA-UV for emacs-devel@gnu.org; Thu, 30 Dec 2021 23:44:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foxmail.com; s=s201512; t=1640925863; bh=W9ncosNA8ObF0TpAnbreu0jVCwfAv3RtqaiZLJoXe4I=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=oh9GN52VKkK/d59/c8x/q+WQOUVOW0VH5zMG/Kfo6GXCQnWT+EQplbsTDxoKKtoax FqKCoOufsHD/DYtnXwzZtZGcbEb2VrB2sL80+Xf3N0KphThitTG4Eg4BxLZbShqBKJ 4vs44z9l5pMFSRyuVMCaMMp2LL2qjVwYUNTGK1bM= Original-Received: from Costume-Party.local ([61.174.174.112]) by newxmesmtplogicsvrsza8.qq.com (NewEsmtp) with SMTP id AC8A1C8B; Fri, 31 Dec 2021 12:43:08 +0800 X-QQ-mid: xmsmtpt1640925788tjuy98eef X-QQ-XMAILINFO: NdxZJPTo58PMktF5qar2l2Sl0Iedm/bRWycCQuIWlP+Gby/NFcvJ822Ur0PxK+ wiMtAqOgn1XEv825tuxweuRkUBftRfWH6lho0OWxucJxBeNXpGZ2i6BfXRDDin3ZN/xpoZNGzbMD TkZ+bqUHN4uwu30qBiFj7NghiNE2wrC2AVZcl8WmyH+/mKBoXRgucXBRcN7T0vq6n2CanZMxM6Dl mq29001broQhMfvZmS3Df8i8C8SE4qt0uV2wNfzecqfBOJD3jSvW6KYG56yIuoYxX9dMoVy6tBnH xV393tmFIbs0fm0zuLl8IBsD/jDfMGy5htXKtN+XIhoAqUvmjXnWxP1X3Akp196crxr4rckkQwmd t8b4wI02tLlLOac360wcDRm5b2V7XzEjb0rRCb80STd+wC788GBu35XjDp/oULwQ5/gRnhfkhbFz aPyttUleNgDZ4o6SOWnmnyUmx3yDZOuSHaPohOxleki0M3yoNnwbIHe54dHO69Yy/DvitakifsDh KIsHXc7TlkXjce0mXDEoQTwy5cTeX5Sb1Dd3d7q/+5s4ODOtb8C/moL9jWLNsXjhvHpaujAUmMP6 UvCmwZPbUqB7wy2b8CbZ/2rYTEkMbZ3M9IltTZ2KfBjzd647RX1oObKxfbGYICeAI3BzkQKS561b IFI22dUkb90JHNnjpSTwXOWtrKS68RWsk+w3VdyQUImFpM/RXDvau7pisbF3UOLe+69uNpDaJteW ADhXM+SjnhJ6sexTlKypMhwUOCZ17MyiMRQmIvXZggZvUGdQxmsokHhBFwiP7NmEktmlgTZvrmP7 kIRZ/ITrav4CIIES7regn+PPSgEqNtH0+LW5WJsl Original-Received: by Costume-Party.local (Postfix, from userid 501) id AD33D203D62CFE; Fri, 31 Dec 2021 12:43:06 +0800 (CST) X-OQ-MSGID: In-Reply-To: X-Face: %[!P\u/BKFRGn_9h9|yO"ho?C0ej^LmM}WMb-`Jfj8OsS^^AKmHYGlD@^|7SEA3UzOGPFbB"OFczY?'\JtJ\lR'@&Y5j; s8{$&|3D>^i.U4l2h?1qpD.+{[$~j]vBeHZf^|BGyL8{/`4 X-Attribution: ldb Received-SPF: pass client-ip=203.205.251.60; envelope-from=andpuke@foxmail.com; helo=out203-205-251-60.mail.qq.com X-Spam_score_int: 27 X-Spam_score: 2.7 X-Spam_bar: ++ X-Spam_report: (2.7 / 5.0 requ) DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, HELO_DYNAMIC_IPADDR=1.951, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_DYNAMIC=0.982, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action 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" Xref: news.gmane.io gmane.emacs.devel:283712 Archived-At: >>>>> In >>>>> LdBeth wrote: >>>>> In >>>>> Stefan Monnier wrote: ldb> There's nothing wrong with the behavior of `make-finalizer`, it just ldb> treats a symbol as a function specifier, just like elisp does not ldb> doing anything to prevent a user from `fset' symbol `nil' and ldb> `(funcall nil)'. Allow me to make a correction: Emacs 27 would report a error when `(fset nil (lambda () 1))', but some Common Lisps would allow that, and `(fset t (lambda () 1))' works in Elisp. I guess it's because of the difference in some implementation details. While `(symbolp nil) => t', `nil' is actually a constant stands for "empty list" that doesn't have the corresponding definition slots. But still, I think the behavior of `make-finalizer' doesn't need a fix. -- LDB