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From: Alan Mackenzie <acm@muc.de>
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Subject: Re: Regexp issue
Date: Sat, 20 Jun 2009 12:47:05 +0000 (UTC)
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Peter Dyballa <Peter_Dyballa@web.de> wrote:

> Am 20.06.2009 um 12:17 schrieb Alan Mackenzie:

>> Or, more precisely,

>>         \(^\|[^<]\)=>


> The imprecise form works for me in GNU Emacsen 22.3 and 23.0.94 (to  
> find => at the beginning of a line) ...

Only at the beginning of _some_ lines.  ;-)

Actually, come to think of it, both of our regexps are wrong.  Neither
of them will find "=>" at point in the middle of a line.  Better would
be
          \(\=\|[^<]\)=>

.  But even that will "fail" if point is at "=" in "<=>", for some
reasonable value of "fail".  By now, the OP is probably wishing he hadn't
bothered asking this question.  ;-)

>   Pete

-- 
Alan Mackenzie (Nuremberg, Germany).