use PadWalker qw( peek_my peek_our );
use strict;
use warnings;

sub name(\[$@%&*]) {
    for my $pad ( peek_my(1), peek_our(1)) {
        while (my ($k,$v) = each %$pad) {
            if ($v == $_[0]) {
                return $k;
            }
        }
    }
    return;
}




our $x = [0];
my @a = (1,2);
my %foo = (1 => 2);
my $subref = sub {};


printf "Name: %s\n", name($x);
printf "Name: %s\n", name(@a);
printf "Name: %s\n", name(%foo);
printf "Name: %s\n", name($subref);