サブ規則の引数リスト 複数渡せる

#!/usr/bin/env perl

use strict;
use Parse::RecDescent;

my $grammar =
q{
    inputs : rule['foo', 'bar', 'baz']
    rule   : 'a' { print "$arg[0] $arg[1] $arg[2]\n"; }
};

my $parse = new Parse::RecDescent ($grammar);

while (<>)
{
    defined $parse->inputs($_) or print "Bad text!\n";
}

で、

a
foo bar baz