From: Paul Eggert <eggert@cs.ucla.edu>
To: "Eli Zaretskii" <eliz@gnu.org>, "Mattias Engdegård" <mattiase@acm.org>
Cc: cpitclaudel@gmail.com, emacs-devel@gnu.org
Subject: Re: :alnum: broken?
Date: Fri, 28 Feb 2020 00:48:32 -0800 [thread overview]
Message-ID: <1c654ac9-10a2-4e5d-f77c-3b78bb580ffc@cs.ucla.edu> (raw)
In-Reply-To: <837e07gmka.fsf@gnu.org>
On 2/28/20 12:09 AM, Eli Zaretskii wrote:
> I don't believe it is right for us to reject questionable but
> valid code.
That begs the question. The code is valid only if we continue to insist that it
be valid, despite the clear drawbacks of doing so. Instead, we can easily change
the definition of Emacs regular expressions so that the code is invalid. Since
such code is invariably a mistake, it's a win to make such a change. That's what
GNU grep has done for many years, and it works.
> I can even agree to reject this at
> run time under a non-default value of some special variable
That would be better than nothing, but it's not very good since most people
won't know about the variable and thus will continue to suffer from these
errors. Better would be to make the default reject these buggy regexps, which is
what GNU grep does (it accepts the buggy regexps only if POSIXLY_CORRECT is set).
next prev parent reply other threads:[~2020-02-28 8:48 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-21 18:58 :alnum: broken? Stephen Leake
2020-02-21 19:00 ` Paul Eggert
2020-02-21 19:32 ` Mattias Engdegård
2020-02-21 21:28 ` Stephen Leake
2020-02-22 1:09 ` Paul Eggert
2020-02-22 7:48 ` Eli Zaretskii
2020-02-22 21:28 ` Paul Eggert
2020-02-23 3:28 ` Eli Zaretskii
2020-02-23 10:21 ` Mattias Engdegård
2020-02-23 18:13 ` Paul Eggert
2020-02-23 18:27 ` Eli Zaretskii
2020-02-23 19:34 ` Óscar Fuentes
2020-02-23 22:12 ` Drew Adams
2020-02-25 3:57 ` Richard Stallman
2020-02-25 14:37 ` Stefan Monnier
2020-02-25 15:45 ` Drew Adams
2020-02-25 15:40 ` Drew Adams
2020-02-25 9:33 ` Andreas Schwab
2020-02-25 13:53 ` Clément Pit-Claudel
2020-02-25 15:40 ` Drew Adams
2020-02-23 18:40 ` Mattias Engdegård
2020-02-26 14:10 ` Mattias Engdegård
2020-02-26 14:54 ` Drew Adams
2020-02-26 15:48 ` Stefan Monnier
2020-02-26 21:00 ` Paul Eggert
2020-02-26 21:18 ` Mattias Engdegård
2020-02-26 21:24 ` Clément Pit-Claudel
2020-02-26 22:01 ` Mattias Engdegård
2020-02-26 22:38 ` Eli Zaretskii
2020-02-27 17:57 ` Mattias Engdegård
2020-02-27 23:17 ` Óscar Fuentes
2020-02-28 8:09 ` Eli Zaretskii
2020-02-28 8:48 ` Paul Eggert [this message]
2020-02-28 13:11 ` Eli Zaretskii
2020-02-28 17:41 ` Paul Eggert
2020-02-28 20:09 ` Eli Zaretskii
2020-02-28 20:25 ` Paul Eggert
2020-02-28 20:38 ` Eli Zaretskii
2020-02-28 21:04 ` Mattias Engdegård
2020-02-28 21:40 ` Eli Zaretskii
2020-02-29 11:43 ` Mattias Engdegård
2020-02-29 12:07 ` Eli Zaretskii
2020-02-29 14:24 ` Stefan Monnier
2020-02-29 14:14 ` Stefan Monnier
2020-02-29 17:33 ` Óscar Fuentes
2020-02-29 19:52 ` Stefan Monnier
2020-02-29 21:12 ` Óscar Fuentes
2020-02-29 22:22 ` Marcin Borkowski
2020-02-29 22:34 ` Clément Pit-Claudel
2020-03-01 22:44 ` Marcin Borkowski
2020-03-02 3:07 ` Stefan Monnier
2020-03-02 7:15 ` Marcin Borkowski
2020-03-02 7:41 ` Emanuel Berg via Emacs development discussions.
2020-03-02 16:14 ` Drew Adams
2020-03-02 16:51 ` Emanuel Berg via Emacs development discussions.
2020-03-02 7:56 ` Joost Kremers
2020-03-02 9:44 ` Štěpán Němec
2020-03-02 10:43 ` Joost Kremers
2020-03-02 13:37 ` Clément Pit-Claudel
2020-03-02 17:03 ` Stefan Monnier
2020-03-02 18:23 ` Clément Pit-Claudel
2020-02-29 23:02 ` Andrea Corallo
2020-03-01 22:41 ` Marcin Borkowski
2020-02-29 22:58 ` Stefan Monnier
2020-02-29 23:28 ` Óscar Fuentes
2020-02-27 1:33 ` Paul Eggert
2020-02-26 16:01 ` Andreas Schwab
2020-02-26 21:06 ` Mattias Engdegård
2020-02-27 8:43 ` Andreas Schwab
2020-02-27 18:05 ` Mattias Engdegård
2020-02-22 9:09 ` Eli Zaretskii
2020-02-23 3:49 ` Richard Stallman
2020-02-23 7:51 ` Paul Eggert
2020-02-23 15:07 ` Eli Zaretskii
2020-02-21 19:01 ` Noam Postavsky
2020-02-21 19:04 ` Andreas Schwab
[not found] <<86wo8flqct.fsf@stephe-leake.org>
[not found] ` <<f89e340f-9a19-50e1-4421-57fd3e235548@cs.ucla.edu>
[not found] ` <<86sgj3ljf0.fsf@stephe-leake.org>
[not found] ` <<E1j5iGS-0000r6-Id@fencepost.gnu.org>
[not found] ` <<18bd2b64-1c2f-055f-4fa0-092bdb1da531@cs.ucla.edu>
[not found] ` <<838sktibpu.fsf@gnu.org>
2020-02-23 16:52 ` Drew Adams
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