foo != 1

foo !~ 1

foo % 1

foo & 1

foo * 1

foo ** 1

foo + 1

foo - 1

foo / 1

foo < 1

foo << 1

foo <= 1

foo <=> 1

foo == 1

foo === 1

foo =~ 1

foo > 1

foo >= 1

foo >> 1

foo ^ 1

foo | 1