| is mapped to C||, and C is mapped to
is reserved by the perl interpreter for
the operator of that name. We can't override it. And
we override C
| as well so as to keep consistent.
For similar reasons, 'base' often gives us trouble too ;)
=item C<< $bool = $obj->can_combine_empty_tags($tag) >>
=head1 SEE ALSO
L<:declare::tagset>, L<:declare::tagset::xul>, L<:declare::tagset::rdf>, L<:declare::tags>, L<:declare>.