From: "Andreas Röhler" <andreas.roehler@easy-emacs.de>
To: help-gnu-emacs@gnu.org
Subject: Re: re-search-forward hangs
Date: Mon, 30 Jul 2018 22:15:21 +0200 [thread overview]
Message-ID: <cacbe84a-9f50-f785-40f5-f1c22cf71cb5@easy-emacs.de> (raw)
In-Reply-To: <86va8w5xeu.fsf@dev.null>
On 30.07.2018 21:35, Robert Girault wrote:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>
>> On 30.07.2018 16:33, Eli Zaretskii wrote:
>>>> From: Andreas Röhler <andreas.roehler@easy-emacs.de>
>>>> Date: Mon, 30 Jul 2018 14:24:06 +0200
>>>>
>>>> (while (re-search-forward "" nil t 1))
>>>>
>>>> Emacs hangs.
>>>>
>>>> Same with plain
>>>>
>>>> (while (search-forward "" nil t 1))
>>>>
>>>> Expect it terminating.
>>>>
>>>> Are there reasons for this?
>>>
>>> Why did you expect it to terminate?
>>
>> Expect a call of search-forward from EOB not being successful.
>
> I see. But searching for the empty string seems to be an always
> successful operation as long as you have a string. The empty string is
> before or after any character in a string, so I would expect it to be
> always found by {re-}search-forward.
>
Hmm, when trying at BOB with some content, changing the times argument
(message "%s" (search-forward "" nil t 1))
(message "%s" (search-forward "" nil t 2))
(message "%s" (search-forward "" nil t 3))
the result remains "43" - looks like the match is not regular.
next prev parent reply other threads:[~2018-07-30 20:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-30 12:24 re-search-forward hangs Andreas Röhler
2018-07-30 14:33 ` Eli Zaretskii
2018-07-30 19:29 ` Andreas Röhler
[not found] ` <mailman.4430.1532978809.1292.help-gnu-emacs@gnu.org>
2018-07-30 19:35 ` Robert Girault
2018-07-30 20:15 ` Andreas Röhler [this message]
2018-07-30 17:53 ` Stefan Monnier
[not found] <mailman.4412.1532953259.1292.help-gnu-emacs@gnu.org>
2018-07-30 13:22 ` Robert Girault
2018-07-30 14:36 ` Ben Bacarisse
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