Turns out that fixing the negation of literals renders the backlit stuff unrequired; remove it.

Author: jnthn

src/QRegex/P6Regex/Actions.nqp

@@ -304,12 +304,6 @@ class QRegex::P6Regex::Actions is HLL::Actions {
         my $qast := QAST::Regex.new( ~$/ , :rxtype('literal'), :node($/) );
         make $qast;
     }
-    
-    method backlit($/) {
-        my $qast := QAST::Regex.new( ~$/, :rxtype('enumcharlist'),
-                        :node($/) );
-        make $qast;
-    }
 
     method assertion:sym<?>($/) {
         my $qast;
@@ -423,11 +417,6 @@ class QRegex::P6Regex::Actions is HLL::Actions {
                     $bs.negate(!$bs.negate) if $<sign> eq '-';
                     @alts.push($bs);
                 }
-                elsif $_<backlit> {
-                    my $bslit := $_<backlit>.ast;
-                    $bslit.negate(!$bslit.negate) if $<sign> eq '-';
-                    @alts.push($bslit);
-                }
                 elsif $_[1] {
                     my $ord0 := nqp::ord($_[0]);
                     my $ord1 := nqp::ord($_[1][0]);

src/QRegex/P6Regex/Grammar.nqp

@@ -195,15 +195,12 @@ grammar QRegex::P6Regex::Grammar is HLL::Grammar {
 
     token assertion:sym<[> { <?before '['|'+'|'-'> <cclass_elem>+ }
 
-    token backlit { '\\' | '-' }
-
     token cclass_elem {
         $<sign>=['+'|'-'|<?>]
         <.normspace>?
         [
         | '[' $<charspec>=(
                   || \s* '-' <!before \s* ']'> <.obs: '- as character range','.. for range, for explicit - in character class, escape it or place as last thing'>
-                  || \s* '\\' <backlit>
                   || \s* '\\' <backslash>
                   || \s* (<-[\]\\]>) [ \s* '..' \s* (.) ]?
               )*