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.help Subject: Re: Sharp--quote [was: url-retrieve fails on most HTTPS sites] Date: Tue, 29 Sep 2020 10:56:56 -0400 Message-ID: References: <87sgb1my75.fsf@hypra-graner> <87k0wdsde8.fsf@ebih.ebihd> <20200928232459.GA128690@scrozzle> <87blhpsc4b.fsf@ebih.ebihd> <871rils1sc.fsf@ebih.ebihd> <20200929093123.GC31698@tuxteam.de> <87eemkrjzg.fsf@ebih.ebihd> <20200929103245.GD31698@tuxteam.de> <87blhoq2kb.fsf@ebih.ebihd> <20200929141421.GA13194@tuxteam.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="19207"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:ENa8XURuNVMaXRj6CIZuyMGSYDI= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Sep 29 16:59:30 2020 Return-path: Envelope-to: geh-help-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 1kNH6I-0004sT-HY for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 29 Sep 2020 16:59:30 +0200 Original-Received: from localhost ([::1]:59422 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kNH6H-0008HB-JP for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 29 Sep 2020 10:59:29 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34644) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kNH3z-00074T-1l for help-gnu-emacs@gnu.org; Tue, 29 Sep 2020 10:57:07 -0400 Original-Received: from static.214.254.202.116.clients.your-server.de ([116.202.254.214]:43124 helo=ciao.gmane.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kNH3x-0004H0-Id for help-gnu-emacs@gnu.org; Tue, 29 Sep 2020 10:57:06 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1kNH3s-0001W6-8l for help-gnu-emacs@gnu.org; Tue, 29 Sep 2020 16:57:00 +0200 X-Injected-Via-Gmane: http://gmane.org/ Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/29 09:57:28 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.199, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:124204 Archived-At: >> > Plus lots of other optimizations the compiler can do if it knows >> > that it's the function value you are talking about. >> Yeah, you have an example of this? > I think Stefan is in a far better position to answer that. AFAIK there is no optimization that applies specifically to #'foo :-( There's really not much opportunity for optimization there, since all it says is "use the function found in the `symbol-function` slot *at the time we actually call it*". But whatever we know about the content of `symbol-value` during compilation may not hold anymore by the time the code is executed. So the differences w.r.t 'foo are limited to: - Tell the *human reader* that the intention here is to refer to a function of that name. - Get a warning from the compiler if the function doesn't seem to exist. - Plus the special case of `cl-flet` and `cl-labels` where the #' is needed to refer to the locally-defined function. Stefan