From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eric Abrahamsen Newsgroups: gmane.emacs.help Subject: Re: Question about parse-time-string and date-to-time Date: Wed, 29 Mar 2017 14:18:01 -0700 Message-ID: <87lgrn235i.fsf@ericabrahamsen.net> References: <87shlv23xt.fsf@ericabrahamsen.net> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1490822364 2909 195.159.176.226 (29 Mar 2017 21:19:24 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 29 Mar 2017 21:19:24 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Mar 29 23:19:21 2017 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1ctKzp-00086F-O1 for geh-help-gnu-emacs@m.gmane.org; Wed, 29 Mar 2017 23:19:13 +0200 Original-Received: from localhost ([::1]:60995 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ctKzv-0000Fm-FO for geh-help-gnu-emacs@m.gmane.org; Wed, 29 Mar 2017 17:19:19 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:45261) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ctKzF-0000Ew-CV for help-gnu-emacs@gnu.org; Wed, 29 Mar 2017 17:18:38 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ctKzC-0000ON-8U for help-gnu-emacs@gnu.org; Wed, 29 Mar 2017 17:18:37 -0400 Original-Received: from [195.159.176.226] (port=48813 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ctKzC-0000NN-1c for help-gnu-emacs@gnu.org; Wed, 29 Mar 2017 17:18:34 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1ctKyx-0002zX-1C for help-gnu-emacs@gnu.org; Wed, 29 Mar 2017 23:18:19 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 19 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:kJ1HpAO+ol1XshBqxd3Txi68iw0= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:112665 Archived-At: Eric Abrahamsen writes: > A conundrum: > > parse-time-string accepts a string representing a date, and parses it > into a list of time elements, with nil for the unknowns. > > date-to-time calls parse-time-string and passes the result straight to > encode-time, to produce a time value. > > encode-time accepts series of time elements, and raises an error if any > of them are nil. > > I might be missing something, but I don't see how date-to-time could > ever work. Wouldn't it always have to replace the nils with zeros before > passing the result to encode time? Or maybe time elements with nils for any of day/month/year are simply considered invalid?