/**
* This method returns whether the operand is a negative number.
*
* @access public
* @static
* @param IRatio\Type $x the object to be evaluated
* @return IBool\Type whether the operand is a negative
* number
*/
public static function isNegative(IRatio\Type $x) : IBool\Type
{
$a = IInt32\Module::isNegative($x->numerator())->unbox();
$b = IInt32\Module::isNegative($x->denominator())->unbox();
return IBool\Type::box(($a || $b) && $a != $b);
}
