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<?php
/**
* This file is part of the MathExecutor package
*
* (c) Alexander Kiryukhin
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code
*/
namespace NXP\Classes\Token;
use NXP\Exception\IncorrectExpressionException;
use NXP\Exception\DivisionByZeroException;
/**
* @author Alexander Kiryukhin <alexander@symdev.org>
*/
class TokenDivision extends AbstractOperator
{
/**
* @return string
*/
public static function getRegex()
{
return '\/';
}
/**
* @return int
*/
public function getPriority()
{
return 2;
}
/**
* @return string
*/
public function getAssociation()
{
return self::LEFT_ASSOC;
}
/**
* @param InterfaceToken[] $stack
*
* @return $this
*
* @throws \NXP\Exception\IncorrectExpressionException
* @throws \NXP\Exception\DivisionByZeroException
*/
public function execute(&$stack)
{
$op2 = array_pop($stack);
$op1 = array_pop($stack);
if ($op1 === null || $op2 === null) {
throw new IncorrectExpressionException("Division requires two operators");
}
if ($this->getDivisionByZeroException() && $op2->getValue() == 0) {
throw new DivisionByZeroException();
}
$result = $op2->getValue() != 0 ? $op1->getValue() / $op2->getValue() : 0;
return new TokenNumber($result);
}
}
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