From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Paul Eggert <eggert@cs.ucla.edu>
Cc: "Mattias Engdegård" <mattiase@acm.org>, emacs-devel@gnu.org
Subject: Re: Scan of regexps in Emacs (March 17)
Date: Wed, 20 Mar 2019 20:57:41 -0400 [thread overview]
Message-ID: <jwvlg19m4ld.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <4b1164c4-e302-ce41-07c3-145d31a97b4c@cs.ucla.edu> (Paul Eggert's message of "Wed, 20 Mar 2019 15:01:51 -0700")
>> I wonder why the doc doesn't just say that `-` should be the last
>> character and not mention the other possibilities which just make the
>> rule unnecessarily complex.
> '-' can also be the first character in a regular expression; this is
> pretty common and is standard.
What I meant is that we should simply tell people to always put it at
the end. AFAIK you can always put it at the end, so it's a simpler
rule to follow. That doesn't mean we have to reject a `-` in other
positions (so we can also accept the usual other rule, but we don't
need to advertise it as much as the main rule).
Stefan
next prev parent reply other threads:[~2019-03-21 0:57 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-17 13:50 Scan of regexps in Emacs (March 17) Mattias Engdegård
2019-03-19 1:21 ` Paul Eggert
2019-03-19 10:34 ` Mattias Engdegård
2019-03-20 1:53 ` Paul Eggert
2019-03-20 2:20 ` Stefan Monnier
2019-03-20 22:01 ` Paul Eggert
2019-03-20 22:59 ` Drew Adams
2019-03-20 23:10 ` Paul Eggert
2019-03-21 3:38 ` Eli Zaretskii
[not found] ` <<deeccd91-0f43-c329-6087-17435550b328@cs.ucla.edu>
[not found] ` <<83d0mk6go5.fsf@gnu.org>
2019-03-21 4:21 ` Drew Adams
2019-03-21 14:17 ` Eli Zaretskii
2019-03-21 0:57 ` Stefan Monnier [this message]
2019-03-21 11:15 ` Mattias Engdegård
2019-04-02 7:33 ` Paul Eggert
2019-04-02 14:15 ` Mattias Engdegård
2019-04-02 14:26 ` Noam Postavsky
2019-04-02 19:13 ` Mattias Engdegård
2019-04-02 16:58 ` Stefan Monnier
2019-04-02 22:08 ` Paul Eggert
2019-04-03 4:52 ` Eli Zaretskii
2019-04-03 17:02 ` Paul Eggert
2019-04-06 9:43 ` Mattias Engdegård
2019-04-07 8:15 ` Michael Albinus
2019-04-07 9:47 ` Paul Eggert
2019-04-07 10:06 ` Mattias Engdegård
2019-04-07 18:45 ` Paul Eggert
2019-03-21 2:07 ` Richard Stallman
2019-03-22 13:26 ` Stephen Leake
2019-03-22 14:03 ` Stefan Monnier
2019-03-22 14:12 ` Mattias Engdegård
2019-03-20 10:04 ` Mattias Engdegård
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