sub parseAny_token
{
   #my $p      = shift;  # pkg or doc
   my $c      = shift;
   #my $objnum = shift;
   #my $gennum = shift;
 
   my $ch = m{ \G (?:
               ([0-9]+)
              |(/)
              |(<<)
              |(\[)
              |\([.+-])
              |(true|false)
              |(null) }xmsi
   } or die "Unrecognized type in parseAny\n";

   # now dispatch based on $1 etc:
   if( defined $1 ) {
       my $num = $1;
       if( m/\G\s+\d+\s+R\b/ ) {
           # Handle $num $num $
           parseRef(      $c, $objnum, $gennum)
       } elsif( m/\G([-+.\d+])/ ) {
           # handle "$num$1"
           "$num$1
           parseNum(      $c, $objnum, $gennum)
       } else {
           # handle "$num"
       };
   } elsif( defined $2 ) { # /
       parseLabel(    $c, $objnum, $gennum)
   }
   ...
}