/**
* This method compares the operands for order.
*
* @access public
* @static
* @param ITuple\Type $xs the left operand
* @param ITuple\Type $ys the right operand
* @return ITrit\Type the order as to whether the left
* operand is less than, equals to,
* or greater than the right operand
*/
public static function compare(ITuple\Type $xs, ITuple\Type $ys) : ITrit\Type
{
$xsl = $xs->length();
$ysl = $ys->length();
$length = IInt32\Module::min($xsl, $ysl);
for ($i = IInt32\Type::zero(); IInt32\Module::lt($i, $length)->unbox(); $i = IInt32\Module::increment($i)) {
$r = $xs->item($i)->compare($ys->item($i));
if ($r->unbox() != 0) {
return $r;
}
}
return ITrit\Type::box($xsl->unbox() <=> $ysl->unbox());
}