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Re: Question on re-search-forward and infinite loop


From: David Maus
Subject: Re: Question on re-search-forward and infinite loop
Date: Mon, 30 Nov 2009 09:24:34 +0100
User-agent: Wanderlust/2.15.6 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (Goj┼Ź) APEL/10.7 Emacs/23.1.50 (i486-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO)

Hi there,

At Thu, 26 Nov 2009 18:17:16 -0500,
Barry Margolin wrote:
> 
> Your regexp matches zero or more whitespace characters at the beginning 
> of a line.  If there's an empty line at the end of the buffer, it will 
> match that.  But since it's a zero-length match, point is left at that 
> position, and the next time around it again matches it.
> 
> In general, whenever a regexp can match a zero-length string, I think 
> that type of loop will go infinitely.

Thanks, this makes perfect sense to me.

Regards,

  -- David
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