gistfile1.txt

$ cat x
grammar ABC {

    regex TOP {
        abc
        :my $*XYZ := 4;

        {
            if $*XYZ {
               say("Darnit, it's about time that we");
               say('had closures in regexes.');
               say('');
               say($*XYZ);
            }
        }
    }
}


ABC.parse('abc');


$ ./nqp x
Darnit, it's about time that we
had closures in regexes.

4
$