From: "B. T. Raven" <btraven@nihilo.net>
To: help-gnu-emacs@gnu.org
Subject: Re: regexp hell
Date: Fri, 28 Dec 2012 11:33:10 -0600 [thread overview]
Message-ID: <kbkl4n0gib@news3.newsguy.com> (raw)
In-Reply-To: <mailman.16202.1356679556.855.help-gnu-emacs@gnu.org>
> On 28/12/2012 10:57, B. T. Raven wrote:
>
>> I am trying to byte-compile my .emacs for the first time and I see the
>> complaint "replace-string is to be used interactively..." or something.
>> I am using the form:
>>
>> (replace-string "\\" "\\\\" nil (point-min) (point-max))
>>
>> in a function and it seems to work but I can't make any equivalent re's
>> work in re-search-forward (the suggested equivalent to be used in a
>> lisp programm). I can't get past the "trailing backslash" error. Is
>> there something kosher for the above replace-string form?
>>
>> Thanks,
>>
>> Ed
>>
>
> You can use `search-forward' (which searches for string, not for regexp),
> as it is suggested in documentation for `replace-string':
>
> (while (search-forward FROM-STRING nil t)
> (replace-match TO-STRING nil t))
>
> Then with the above strings it should replace one backslash with two.
Thanks, Filipp. That's what I needed. Now the .emacs byte-compiles
without issuing a warning.
>
> But if you still need to write a regexp, it seems that you need to
> double the amount of backslashes. To include a backslash in a regexp you
> need to prefix it with another backslash and each backslash should be
> prefixed with another one when written in a lisp program (so, 4
> backslashes in a program for a single one in regexp).
>
prev parent reply other threads:[~2012-12-28 17:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-28 6:57 regexp hell B. T. Raven
2012-12-28 7:25 ` Filipp Gunbin
[not found] ` <mailman.16202.1356679556.855.help-gnu-emacs@gnu.org>
2012-12-28 17:33 ` B. T. Raven [this message]
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