From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#15042: 24.3.50; while-no-input and input-pending-p Date: Wed, 07 Aug 2013 14:02:08 -0400 Message-ID: References: <87wqnx7bnl.fsf@web.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1375898601 769 80.91.229.3 (7 Aug 2013 18:03:21 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 7 Aug 2013 18:03:21 +0000 (UTC) Cc: 15042@debbugs.gnu.org, Thierry Volpiatto To: Michael Heerdegen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Aug 07 20:03:21 2013 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1V784u-000244-59 for geb-bug-gnu-emacs@m.gmane.org; Wed, 07 Aug 2013 20:03:20 +0200 Original-Received: from localhost ([::1]:50539 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V784t-0004mc-Pf for geb-bug-gnu-emacs@m.gmane.org; Wed, 07 Aug 2013 14:03:19 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:37147) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V784j-0004mL-Dm for bug-gnu-emacs@gnu.org; Wed, 07 Aug 2013 14:03:17 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1V784c-000367-4e for bug-gnu-emacs@gnu.org; Wed, 07 Aug 2013 14:03:09 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:51688) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1V784c-000362-2O for bug-gnu-emacs@gnu.org; Wed, 07 Aug 2013 14:03:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1V784b-0004my-Pr for bug-gnu-emacs@gnu.org; Wed, 07 Aug 2013 14:03:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Wed, 07 Aug 2013 18:03:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 15042 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 15042-submit@debbugs.gnu.org id=B15042.137589853718322 (code B ref 15042); Wed, 07 Aug 2013 18:03:01 +0000 Original-Received: (at 15042) by debbugs.gnu.org; 7 Aug 2013 18:02:17 +0000 Original-Received: from localhost ([127.0.0.1]:46004 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1V783s-0004lS-JQ for submit@debbugs.gnu.org; Wed, 07 Aug 2013 14:02:16 -0400 Original-Received: from ironport2-out.teksavvy.com ([206.248.154.182]:58394) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1V783q-0004lC-PP for 15042@debbugs.gnu.org; Wed, 07 Aug 2013 14:02:15 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av8EABK/CFFLd/Nq/2dsb2JhbABEuzWDWRdzgh4BAQQBViMFCws0EhQYDSSIHgbBLZEKA6R6gV6DEw X-IPAS-Result: Av8EABK/CFFLd/Nq/2dsb2JhbABEuzWDWRdzgh4BAQQBViMFCws0EhQYDSSIHgbBLZEKA6R6gV6DEw X-IronPort-AV: E=Sophos;i="4.84,565,1355115600"; d="scan'208";a="20869490" Original-Received: from 75-119-243-106.dsl.teksavvy.com (HELO pastel.home) ([75.119.243.106]) by ironport2-out.teksavvy.com with ESMTP/TLS/ADH-AES256-SHA; 07 Aug 2013 14:02:01 -0400 Original-Received: by pastel.home (Postfix, from userid 20848) id 4446A66AF2; Wed, 7 Aug 2013 14:02:08 -0400 (EDT) In-Reply-To: <87wqnx7bnl.fsf@web.de> (Michael Heerdegen's message of "Wed, 07 Aug 2013 17:39:42 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 140.186.70.43 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.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:77043 Archived-At: > 1. `input-pending-p' can (and does) return t in cases were no input is > pending (see the doc). In such cases, `while-no-input' just returns t, > although no input was given. This contradicts the doc, is not useful > and the behavior is unforeseeable. Those cases where it immediately returns t should hopefully be very similar to those cases where it stops in the middle even tho the event that interrupted it is "ignorable". > 2. Even if `input-pending-p' would not give false alarm sometimes - why > needs `while-no-input' to use it? while-no-input is for code which should runs "transparently" without preventing the user from running his commands. So if the user has already typed the next key before we even get to while-no-input, we definitely should not enter the while-no-input, since while-no-input is implemented such that it is only interrupted by *new* input. > With the current implementation, I have to `discard-input' if I don't > want this. Can you give an example where you'd want to do that? I experienced that (while-no-input code ...) is sometimes semantically equivalent to t without any input. Stefan