my $p2 = Parse::RecDescent->new(q(
                                hyphen     : "-"
                                option     : "a" | "b" | "c"
                                Format     : Entry(s)
                                Pre        : hyphen option
                                Post       : option hyphen
                                Entry      : Pre | Post
                                { use Data::Dumper; print Dumper \%item;}
));
$p2->Format('a-');
$p2->Format('-a');

##</code><code>##

$VAR1 = {
          'Post' => '-',
          '__RULE__' => 'Entry'
        };

##</code><code>##

$VAR1 = {
          'Post' => 'a-',
          '__RULE__' => 'Entry'
        };
$VAR1 = {
          'Post' => '-a',
          '__RULE__' => 'Entry'
        };