Re: [FWP] japhy had a silly idea...

[Jeff Pinyan <jeffp@crusoe.net>]

On May 25, Randal L. Schwartz said:

>>>>>> "Jeff" == Jeff Pinyan <jeffp@crusoe.net> writes:
>
>>> Or even simpler:
>>> 
>>> $b = '\A$b\z';
>>> 
>>> The regex is /$b/.  It matches only '$b'. :)
>
>Jeff> That fails.  It has to match '\A$b\z'.
>
>No, the regex is "dollar b".  it matches "dollar b" and only "dollar
>b".  It just happens to need a Perl variable called "$b" set to a
>particular value. :)

Perhaps I wasn't clear enough...

  $re = q{^.*(??{$&eq'^.*(??{'.substr($&,7,46).'})\z'?'':'(?!)'})\z};
  $re =~ $re;

See that?  That is what must be done.  The regex must match the text of
the regex itself, and no other text.

-- 
Jeff "japhy" Pinyan      japhy@pobox.com      http://www.pobox.com/~japhy/
Are you a Monk?  http://www.perlmonks.com/     http://forums.perlguru.com/
Perl Programmer at RiskMetrics Group, Inc.     http://www.riskmetrics.com/
Acacia Fraternity, Rensselaer Chapter.         Brother #734
** I need a publisher for my book "Learning Perl's Regular Expressions" **


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