Using this feature triggers warnings in the category
C<experimental::lexical_subs>.
+The ticket for this feature is
+L<[perl #120085]|https://rt.perl.org/rt3/Ticket/Display.html?id=120085>.
+
=item Regular Expression Set Operations
Introduced in: Perl 5.18
=item Unicode in Perl on EBCDIC
-See also: L<perlre/"Special Backtracking Control Verbs">
-
=back
=head2 Accepted features