<BEGIN_TEMPT_FATE>This one will handle nested parens:</END_TEMPT_FATE> 

$_ = '(($a $a hi) $a ($a) $a)';
my  $re;
$re = qr/\((?:(?>[^()]*)|(??{$re}))*\)/;
s/($re)|\$a/$1?$1:'$b'/eg;
print;

__DATA__
(($a $a hi) $b ($a) $b)

[download]

Oops!

cheers

tachyon

s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print

In reply to Re: Re: Re: Replacement Regex by tachyon
in thread Replacement Regex by Anonymous Monk

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