Great! Two quick tips:

if scalar(@$v)>=1;
can be written as
if @$v;

If you could please avoid <pre>...</pre> on PerlMonks. <c>...</c> is preferred. It also saves you from encoding "&", "<" and ">"

In reply to Re^3: Bug with nested named capture buffers by ikegami
in thread Bug with nested named capture buffers by matthewshark

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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