use Set::Object;
print "1..3\n";
my $s = Set::Object->new(qw(a b c 0));
print "not " unless $s->member('a') eq 'a';
print "ok 1\n";
print "not " unless $s->element('0') eq '0';
print "ok 2\n";
print "not " if defined $s->member('1');
print "ok 3\n";