20 if (($x = &foo(1)) == 1) {print "ok 1\n";} else {print "not ok 1 '$x'\n";}
21 if (($x = &foo(2)) == 2) {print "ok 2\n";} else {print "not ok 2 '$x'\n";}
22 if (($x = &foo(3)) == 3) {print "ok 3\n";} else {print "not ok 3 '$x'\n";}
23 if (($x = &foo(4)) == 4) {print "ok 4\n";} else {print "not ok 4 '$x'\n";}