Perl 6 Regex Tablet: Revision 13
Larry Wall: We put the "Regular" back into "Expression".
Like quotes, are Regular Expressions now a sublanguage, a language inside the language, instead of being just funny strings. They are parsed by a completely different set of rules, which are stored in the special variable $~Regex ($~Trans for transliterations and $~P5Regex for compatible Regexes). But these rules are made much more consistant with the main language than before.
rx// aka Q :regex //
my $escaped = $html.trans([ '&', '<', '>' ] =>);