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.devel Subject: Re: What's happened to M- `completion-at-point'? Date: Wed, 04 May 2022 16:50:14 -0400 Message-ID: References: <83bkwd4xle.fsf@gnu.org> <83sfpp2qvy.fsf@gnu.org> <83r1592km7.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13588"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: Alan Mackenzie , Eli Zaretskii , Emacs developers To: Yuri Khan Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed May 04 22:52:05 2022 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 1nmLyf-0003Ny-2F for ged-emacs-devel@m.gmane-mx.org; Wed, 04 May 2022 22:52:05 +0200 Original-Received: from localhost ([::1]:50864 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nmLyd-0000uy-M4 for ged-emacs-devel@m.gmane-mx.org; Wed, 04 May 2022 16:52:03 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:56122) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nmLwz-0007iw-Vp for emacs-devel@gnu.org; Wed, 04 May 2022 16:50:21 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:64865) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nmLwx-0001v2-8i; Wed, 04 May 2022 16:50:20 -0400 Original-Received: from pmg2.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 037A380539; Wed, 4 May 2022 16:50:17 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg2.iro.umontreal.ca (Proxmox) with ESMTP id 7B56D80099; Wed, 4 May 2022 16:50:15 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1651697415; bh=jfOM7Pj/K1g84h7oS35cHk/l8HRnAeNGy7ssR387skk=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=ei2rrmzoaS4rBf4Nfv5l7DO2naeCeEBF183JOWMU4nWPY7DWdHjOeAiFJp9dhDrRZ ViFlm0pUOmaZhBk+OVIzvkhBtQUjWwEDhePiVcVbq8sche1AQ87Xz1zZkJev/ftvtA TZlol92LVf6gxgA0FFUvmfU7vHoxi3hh9YuPnrBxlcJ9IUJxqFWE0o4rNLuIuWxii1 Mr9vrhAzJgwHnzUlVixO11v/vhUP5v9T04njpHjx7PbuDAip1UJ4JxA5ySN1O9GAtZ MnYasv8d48F6RiEvLA158AllUy3tn10auAy0NJ8AVaBtL3ZNuag+0tD+UYUiaMuZ4a RJtg9UICmYBZg== Original-Received: from alfajor (lechon.iro.umontreal.ca [132.204.27.242]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 6CF9F1202BB; Wed, 4 May 2022 16:50:15 -0400 (EDT) In-Reply-To: (Yuri Khan's message of "Thu, 5 May 2022 03:31:24 +0700") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham 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:289212 Archived-At: Yuri Khan [2022-05-05 03:31:24] wrote: > On Thu, 5 May 2022 at 03:16, Stefan Monnier wrote: >> AFAIK the `backtab` is usually used for `S-tab` rather than `M-tab`. >> What do you get if you hit the TAB key together with the Shift modifier? >> Does Emacs also receive the ESC TAB byte sequence in that (and then maps >> it back (correctly this time) to `backtab`)? > On my Ubuntu 22.04 with Linux 5.15.0, in tty, both Shift+Tab and > Alt+Tab produce an ESC TAB sequence. Aha! Shift+Tab === Linux kernel ===> ESC TAB === ncurses ===> backtab makes sense. > So probably the problem on the > ncurses/terminfo side is induced by a problem on the Linux side. Indeed, the problem seems to be that both Shift+Tab and Alt+Tab emit the same byte sequence (the byte sequence historically used for M-Tab) and are hence indistinguishable :-( In the mean time we can add a hack in lisp/term/linux.el to remove the bogus `ESC TAB => backtab` remapping since I suspect that `Alt+Tab` is used much more often than `Shift+Tab` in Emacs running in the Linux console. Stefan