From: Eli Zaretskii <eliz@gnu.org>
To: Paul Eggert <eggert@cs.ucla.edu>
Cc: michael.albinus@gmx.de, emacs-devel@gnu.org
Subject: Re: master d0c77a1: Remove some assumptions about timestamp format
Date: Fri, 28 Sep 2018 09:32:45 +0300 [thread overview]
Message-ID: <83h8ia6sj6.fsf@gnu.org> (raw)
In-Reply-To: <e089c736-0b3e-af37-bfbc-02a1a2efda19@cs.ucla.edu> (message from Paul Eggert on Thu, 27 Sep 2018 13:46:51 -0700)
> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Thu, 27 Sep 2018 13:46:51 -0700
> Cc: emacs-devel@gnu.org
>
> I'm afraid we need something better than that, as it mishandles NaNs.
> Also, there's no need for a special "invalid_time" value; you can just
> use a NaN.
It's OK to support NaNs in time values, but I'm uneasy with the
recommendation to use NaN as an invalid time. IMO, NaNs should only
come out of calculations, never from initial literal values of a
program (except when the program wants to test NaN handling).
What is the problem with having a special invalid time value?
next prev parent reply other threads:[~2018-09-28 6:32 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20180925021527.10418.61555@vcs0.savannah.gnu.org>
[not found] ` <20180925021528.9A119204E8@vcs0.savannah.gnu.org>
2018-09-25 10:09 ` master d0c77a1: Remove some assumptions about timestamp format Michael Albinus
2018-09-26 1:09 ` Paul Eggert
2018-09-26 9:24 ` Michael Albinus
2018-09-26 9:39 ` Eli Zaretskii
2018-09-26 9:43 ` Michael Albinus
2018-09-27 20:46 ` Paul Eggert
2018-09-28 6:32 ` Eli Zaretskii [this message]
2018-09-28 10:26 ` Michael Albinus
2018-09-28 17:27 ` Paul Eggert
2018-09-29 13:35 ` Michael Albinus
2018-09-28 14:45 ` Paul Eggert
2018-09-28 14:54 ` Michael Albinus
2018-09-28 1:50 ` Paul Eggert
2018-09-28 10:35 ` Michael Albinus
2018-09-28 17:39 ` Paul Eggert
2018-09-28 18:06 ` Naming predicates (was: master d0c77a1: Remove some assumptions about timestamp format) Stefan Monnier
2018-09-28 18:28 ` Drew Adams
2018-09-28 19:12 ` Paul Eggert
2018-09-28 19:26 ` Naming predicates Stefan Monnier
2018-09-28 19:40 ` Drew Adams
2018-09-28 19:41 ` Naming predicates (was: master d0c77a1: Remove some assumptions about timestamp format) Drew Adams
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