(found using code from Karl Williamson <public@khwilliamson.com>)
A named capture group. Identical in every respect to normal capturing
parentheses C<()> but for the additional fact that C<%+> or C<%-> may be
-used after a successful match to refer to a named group. See C<perlvar>
+used after a successful match to refer to a named group. See L<perlvar>
for more details on the C<%+> and C<%-> hashes.
If multiple distinct capture groups have the same name then the