From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: Scan of regexps in Emacs (March 17)
Date: Tue, 02 Apr 2019 12:58:18 -0400 [thread overview]
Message-ID: <jwv4l7gxscx.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: 09AE372B-3A30-4596-8C4E-B9F4CBF6E348@acm.org
> (string-match "\xff" "\xff") => 0
> (string-match "[\xff]" "\xff") => 0
> (string-match "\xffé?" "\xff") => nil
> (string-match "[\xff]é?" "\xff") => 0
> (string-match "\xff" "\xffé") => 0
> (string-match "[\xff]" "\xffé") => nil
> (string-match "\xffé?" "\xffé") => 0
> (string-match "[\xff]é?" "\xffé") => nil
Check (multibyte-string-p "...") on those strings, to see some of the
reasons why. IIRC the treatment of those escape sequences to determine
unibyte/multibyte strings is pretty tricky (last time I looked at it,
I found its behavior to be undesirable, but I believe it has slightly
changed since and I can't remember what were the problems I bumped
into).
Stefan
next prev parent reply other threads:[~2019-04-02 16:58 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
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 [this message]
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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