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Re: Problem with whitespaces in search

From: Philippe Delavalade
Subject: Re: Problem with whitespaces in search
Date: Thu, 28 Jan 2016 16:36:34 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

Le jeudi 28 janvier à 16:24, Bob Proulx a écrit :
> Philippe Delavalade wrote:
> > I have just noticed a problem when searching whitespaces. I'm using version
> > 24.3.1 under linux/slackware 14.1.
> > 
> > For instance, with a file containing the unique line
> > 
> > abcd  fghix   jklmxx    nopqxxx
> > 
> > and with the cursor on column 0, when searching whitespaces (incremental or
> > not), the cursor comes under the 'f' which is normal but it stays their
> > even when typing many ' '.
> > 
> > This does not happen with 'x' for instance.
> > 
> > What can I do to avoid this and find many whitespaces ?
> > 
> > I hope have been clear and sorry for my poor english.
> This is a case where something that is a feature for one person is a
> bug to another person.  I always disable "lax space matching" myself.
> This is documented here:
> It isn't clear exactly what you are wishing.  You might be wanting to
> set search-whitespace-regexp to nil to disable the feature?
>   (setq search-whitespace-regexp nil)
> See also the builtin documentation on search-whitespace-regexp.
>   (describe-variable 'search-whitespace-regexp)
>   search-whitespace-regexp is a variable defined in `isearch.el'.
>   Its value is nil
>   Original value was "\\s-+"
>   Documentation:
>   If non-nil, regular expression to match a sequence of whitespace chars.
>   When you enter a space or spaces in the incremental search, it
>   will match any sequence matched by this regexp.  As an exception,
>   spaces are treated normally in regexp incremental search if they
>   occur in a regexp construct like [...] or *, + or ?.
>   If the value is a string, it applies to both ordinary and
>   regexp incremental search.  If the value is nil, or
>   `isearch-lax-whitespace' is nil for ordinary incremental search, or
>   `isearch-regexp-lax-whitespace' is nil for regexp incremental search,
>   then each space you type matches literally, against one space.
>   You might want to use something like "[ \t\r\n]+" instead.
>   In the Customization buffer, that is `[' followed by a space,
>   a tab, a carriage return (control-M), a newline, and `]+'.

Thanks Bob. I was wishing to find sequence of whitespaces ; so I followed
Tomas help and put
(setq  isearch-lax-whitespace nil)
in .emacs and now I have what I expect.

I'll have a look to your link.

For regexp, it was working 'normally' for me :-)


Ph. Delavalade

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