From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Ctrl-[ ? Date: Thu, 06 Jun 2019 08:58:54 -0400 Message-ID: References: <08AC8151-5911-40FA-8B20-818B839D00AB@traduction-libre.org> <6F55E018-B15E-42B0-8794-21F55BBA23D3@traduction-libre.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="122347"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Jun 06 15:00:01 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hYrzt-000VUt-Og for ged-emacs-devel@m.gmane.org; Thu, 06 Jun 2019 15:00:01 +0200 Original-Received: from localhost ([127.0.0.1]:60148 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hYrzs-0008Qn-Ls for ged-emacs-devel@m.gmane.org; Thu, 06 Jun 2019 09:00:00 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:60830) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hYryw-0008PF-RX for emacs-devel@gnu.org; Thu, 06 Jun 2019 08:59:03 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hYryv-0003PL-PB for emacs-devel@gnu.org; Thu, 06 Jun 2019 08:59:02 -0400 Original-Received: from [195.159.176.226] (port=44266 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hYryv-0003Em-Hd for emacs-devel@gnu.org; Thu, 06 Jun 2019 08:59:01 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.89) (envelope-from ) id 1hYryt-000UML-GP for emacs-devel@gnu.org; Thu, 06 Jun 2019 14:58:59 +0200 X-Injected-Via-Gmane: http://gmane.org/ Cancel-Lock: sha1:2XGnuThh3eVRizqKHO4RogoaUMQ= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 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:237274 Archived-At: > I found on Stackoverflow that C-[ was pretty much hard-coded as > ESC. Why is that ? Under most terminals, `escape` and `C-[` send the same byte sequence, i.e. a single byte 27 which corresponds to the ascii ESC character. For this reason, when the GUI version of Emacs was introduced (where the two keys are clearly distinguished), Emacs added `function-key-map` entries to turn `escape` into ESC when there's no specific `escape` binding (the mapping from `C-[` to ESC is done at a much lower level, this one definitely counts as hardcoded). Stefan