all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
From: Robert Girault <r@dev.null>
To: help-gnu-emacs@gnu.org
Subject: Re: re-search-forward hangs
Date: Mon, 30 Jul 2018 16:35:38 -0300	[thread overview]
Message-ID: <86va8w5xeu.fsf@dev.null> (raw)
In-Reply-To: mailman.4430.1532978809.1292.help-gnu-emacs@gnu.org

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.


  parent reply	other threads:[~2018-07-30 19:35 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 [this message]
2018-07-30 20:15       ` Andreas Röhler
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=86va8w5xeu.fsf@dev.null \
    --to=r@dev.null \
    --cc=help-gnu-emacs@gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.