Match.pretty output

match-pretty.pl

grammar Color {
    regex blue { :i "blue" }
    regex green { :i "green" }
    regex TOP { [<blue> | <green>] <rest> }
    token rest { ' ' <alpha>+ }
}

my $match = Color.parse("Blue skies");

say $match.pretty;

output

=> <Blue skies>
 blue => <Blue>
 rest => < skies>
  alpha => <s>
  alpha => <k>
  alpha => <i>
  alpha => <e>
  alpha => <s>