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<?php
/**
* SCSSPHP
*
* @copyright 2012-2020 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://scssphp.github.io/scssphp
*/
namespace ScssPhp\ScssPhp\Value;
/**
* An enumeration of possible operators for {@see CalculationOperation}.
*/
final class CalculationOperator
{
public const PLUS = '+';
public const MINUS = '-';
public const TIMES = '*';
public const DIVIDED_BY = '/';
/**
* The precedence of the operator
*
* An operator with higher precedence binds tighter.
*
* @phpstan-param CalculationOperator::* $operator
*
* @internal
*/
public static function getPrecedence(string $operator): int
{
switch ($operator) {
case self::PLUS:
case self::MINUS:
return 1;
case self::TIMES:
case self::DIVIDED_BY:
return 2;
}
throw new \InvalidArgumentException(sprintf('Unknown operator "%s".', $operator));
}
}
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