A footnote. I was curious about Regexp::Common. So: 
use Regexp::Common qw/balanced/;
say $RE{balanced}{-parens=>'()'} ;

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And I can now see why I didn't have a hope of figuring out the RE on my own... :o)

In reply to Re^3: Matching nested parens by BernieC
in thread Matching nested parens by BernieC

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