From: Lars Ingebrigtsen <larsi@gnus.org>
To: Paul Eggert <eggert@cs.ucla.edu>
Cc: emacs-devel@gnu.org
Subject: Re: master 71783e9: Add the string-numeric-lessp function
Date: Mon, 22 Feb 2016 15:00:42 +1100 [thread overview]
Message-ID: <87twl1xul1.fsf@gnus.org> (raw)
In-Reply-To: <56CA8578.2030004@cs.ucla.edu> (Paul Eggert's message of "Sun, 21 Feb 2016 19:50:16 -0800")
Paul Eggert <eggert@cs.ucla.edu> writes:
> Not quite sure I'm following. Every string is a version string.
I don't think I agree with that. All version strings are strings,
though.
>> And is this supposed to be this way?
>>
>> (string-version-lessp "foo001.png" "foo1.png")
>
> Yes, if the version numbers and everything else result in a tie, it
> falls back on straight lexicographic comparison. Having the function
> be anything other than a total order would cause problems in sorting
> functions that use it to compare.
That sounds fine for version numbers, but is not what we want when
sorting file names, I think.
> Oh, and in response to one of your other questions: this function
> should be useful for package versions as well as file names. For
> example, I recently updated my libc-bin version on Ubuntu from
> 2.21-0ubuntu4 to 2.21-0ubuntu4.1 as part of the getaddrinfo security
> update.
I don't think that's something our numerical string comparison function
should be doing. This version string thing sounds very much geared
towards version strings, and that's fine. Using that function for
anything else seems increasingly odd.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2016-02-22 4:00 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20160221043348.25201.81719@vcs.savannah.gnu.org>
[not found] ` <E1aXLiO-0006ZB-4R@vcs.savannah.gnu.org>
2016-02-21 4:43 ` master 71783e9: Add the string-numeric-lessp function Lars Ingebrigtsen
2016-02-21 5:36 ` Lars Ingebrigtsen
2016-02-21 6:15 ` Stephan Mueller
2016-02-21 10:02 ` Lars Ingebrigtsen
2016-02-21 19:35 ` Yuri Khan
2016-02-22 2:51 ` Lars Ingebrigtsen
2016-02-22 17:59 ` Richard Stallman
2016-02-21 21:30 ` Paul Eggert
2016-02-22 1:32 ` Andy Moreton
2016-02-22 4:01 ` Paul Eggert
2016-02-22 16:11 ` Eli Zaretskii
2016-02-22 2:53 ` Lars Ingebrigtsen
2016-02-22 3:50 ` Paul Eggert
2016-02-22 4:00 ` Lars Ingebrigtsen [this message]
2016-02-22 4:16 ` Paul Eggert
2016-02-22 4:22 ` Lars Ingebrigtsen
2016-02-22 5:56 ` Paul Eggert
2016-03-07 0:16 ` Juri Linkov
2016-03-07 0:53 ` Paul Eggert
2016-03-07 17:45 ` Richard Stallman
2016-03-07 17:49 ` Lars Magne Ingebrigtsen
2016-03-07 23:55 ` Juri Linkov
2016-03-07 23:52 ` Juri Linkov
2016-03-08 2:06 ` Paul Eggert
2016-03-08 9:26 ` Andreas Schwab
2016-03-09 9:26 ` Paul Eggert
2016-03-07 2:27 ` Drew Adams
2016-03-07 21:14 ` Johan Bockgård
2016-03-07 22:03 ` Drew Adams
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