From: Stefan Monnier <monnier@iro.umontreal.ca>
To: David Kastrup <dak@gnu.org>
Cc: "Stephen J. Turnbull" <stephen@xemacs.org>,
Eli Zaretskii <eliz@gnu.org>,
emacs-devel@gnu.org
Subject: Re: utf-16le vs utf-16-le
Date: Tue, 15 Apr 2008 11:35:30 -0400 [thread overview]
Message-ID: <jwv3apndtrw.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <8563ujhdtl.fsf@lola.goethe.zz> (David Kastrup's message of "Tue, 15 Apr 2008 07:44:38 +0200")
>>>> You mean, it's almost exactly the same, except it's completely
>>>> different? Then I agree,
>>
>>> "Start/end of line" and "Start of buffer/communication" is not
>>> "completely different". Likewise, "\\`" and "^" are not "completely
>>> different" regular expressions.
>>
>> But by EOL we don't mean "^" or "$", but "\n": this *is* completely
>> different from "\\`".
> I fail to see anything close to a coherent argument here, and it is
> probably not relevant to the issue at hand, anyway. So we might as well
> stop.
Look at the src/regex.c code (or any other regex manipulation code);
compare the code needed for "^" and "$" to the code needed for "\n".
"\n" is trivial, just like any other char (which is the key here:
EOL-conversion is just a way to convert the \n to a byte sequence and
vice-versa, which is why it integrates well with EOL-conversion),
whereas ^ and $ require special handling because they have to look
before or after the matched text.
Try (replace-regexp-in-string "\\>" "toto" "a b c") to get a feeling for
the kinds of problems you can get with regexp elements that look outside
of the matched text.
Stefan
next prev parent reply other threads:[~2008-04-15 15:35 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-13 14:54 utf-16le vs utf-16-le Eli Zaretskii
2008-04-13 19:32 ` Stefan Monnier
2008-04-14 5:17 ` Kenichi Handa
2008-04-14 6:10 ` David Kastrup
2008-04-14 18:54 ` Eli Zaretskii
2008-04-14 19:04 ` David Kastrup
2008-04-14 17:38 ` Eli Zaretskii
2008-04-14 18:57 ` Eli Zaretskii
2008-04-13 22:23 ` Stephen J. Turnbull
2008-04-14 3:19 ` Eli Zaretskii
2008-04-14 7:32 ` Stephen J. Turnbull
2008-04-14 8:20 ` David Kastrup
2008-04-14 18:25 ` Stephen J. Turnbull
2008-04-14 18:46 ` Eli Zaretskii
2008-04-14 21:01 ` Stephen J. Turnbull
2008-04-14 21:15 ` Andreas Schwab
2008-04-15 0:22 ` Stephen J. Turnbull
2008-04-15 3:25 ` Eli Zaretskii
2008-04-15 16:51 ` Stephen J. Turnbull
2008-04-15 20:09 ` Eli Zaretskii
2008-04-15 20:31 ` Eli Zaretskii
2008-04-15 20:35 ` David Kastrup
2008-04-16 20:15 ` Stephen J. Turnbull
2008-04-16 20:32 ` David Kastrup
2008-04-17 3:23 ` Stephen J. Turnbull
2008-04-17 3:26 ` Eli Zaretskii
2008-04-17 7:44 ` Stephen J. Turnbull
2008-04-17 8:19 ` Jan Djärv
2008-04-17 12:41 ` Eli Zaretskii
2008-04-17 17:20 ` Stephen J. Turnbull
2008-04-17 18:03 ` Eli Zaretskii
2008-04-16 22:09 ` Eli Zaretskii
2008-04-17 1:14 ` Stefan Monnier
2008-04-14 20:20 ` Stefan Monnier
2008-04-14 20:58 ` David Kastrup
2008-04-14 22:19 ` Stefan Monnier
2008-04-14 22:26 ` David Kastrup
2008-04-14 22:33 ` Stefan Monnier
2008-04-15 5:44 ` David Kastrup
2008-04-15 15:35 ` Stefan Monnier [this message]
2008-04-14 21:35 ` Stephen J. Turnbull
2008-04-14 5:17 ` Kenichi Handa
2008-04-14 13:57 ` Stefan Monnier
2008-04-14 7:02 ` tomas
2008-04-14 17:45 ` Eli Zaretskii
2008-04-15 7:38 ` tomas
2008-04-15 22:30 ` Juri Linkov
2008-04-16 3:20 ` Eli Zaretskii
2008-04-16 8:12 ` Jason Rumney
2008-04-16 13:35 ` Stefan Monnier
2008-04-16 14:45 ` Jason Rumney
2008-04-16 17:05 ` Stefan Monnier
2008-04-16 20:09 ` Stephen J. Turnbull
2008-04-16 23:17 ` Juri Linkov
2008-04-16 23:42 ` Jason Rumney
2008-04-17 1:03 ` Kenichi Handa
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