I use this regex to match (but not capture) nested parens. It's from the Camel, 3rd. ed., p. 314.

my $np;
$np = qr{
        \(
        (?:
                (?> [^()]+ )
        |
                (??{ $np })
        )*
        \)
}x;

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In reply to Re: search for matching parentheses by smammy
in thread search for matching parentheses by embirath

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