/usr/bin/perl

use strict;
use warnings;

use lib 'blib/lib';
use Regexp::Assemble;

my $r = Regexp::Assemble->new->track(1)->add(qw(foo? bar{2} [Rr]at));

for my $w (qw(this food is rather barren)) {
	if ($w =~ /$r/) {
		print "$w matched by ", $r->source($^R), $/;
	}
	else {
		print "$w no match\n";
	}
}