Using this feature triggers warnings in the category
C<experimental::lexical_topic>.
-=item Backtracking control verbs
-
-C<(*ACCEPT)>
-
-Introduced in: Perl 5.10
-
=item Pluggable keywords
See L<perlapi/PL_keyword_plugin> for the mechanism.
Exact version of acceptance unclear, but no later than Perl 5.18.
+=item Backtracking control verbs
+
+C<(*ACCEPT)>
+
+Introduced in: Perl 5.10
+
+Accepted in Perl 5.20.0
+
=back
=head2 Removed features
=head2 Special Backtracking Control Verbs
-B<WARNING:> These patterns are experimental and subject to change or
-removal in a future version of Perl. Their usage in production code should
-be noted to avoid problems during upgrades.
-
These special patterns are generally of the form C<(*VERB:ARG)>. Unless
otherwise stated the ARG argument is optional; in some cases, it is
forbidden.
=item C<(*ACCEPT)>
X<(*ACCEPT)>
-B<WARNING:> This feature is highly experimental. It is not recommended
-for production code.
-
This pattern matches nothing and causes the end of successful matching at
the point at which the C<(*ACCEPT)> pattern was encountered, regardless of
whether there is actually more to match in the string. When inside of a