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: / opt / psa / admin / plib / modules / monitoring / vendor / nxp / math-executor / src / NXP / Classes /

Filename : Operator.php

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<?php

namespace PleskMonitoring\NXP\Classes;

use PleskMonitoring\NXP\Exception\IncorrectExpressionException;
use ReflectionFunction;
class Operator
{
    /**
     * @var callable(\SplStack)
     */
    public $function;
    public int $places = 0;
    /**
     * Operator constructor.
     */
    public function __construct(public string $operator, public bool $isRightAssoc, public int $priority, callable $function)
    {
        $this->function = $function;
        $reflection = new ReflectionFunction($function);
        $this->places = $reflection->getNumberOfParameters();
    }
    /**
     * @param array<Token> $stack
     *
     * @throws IncorrectExpressionException
     */
    public function execute(array &$stack) : Token
    {
        if (\count($stack) < $this->places) {
            throw new IncorrectExpressionException();
        }
        $args = [];
        for ($i = 0; $i < $this->places; $i++) {
            \array_unshift($args, \array_pop($stack)->value);
        }
        $result = \call_user_func_array($this->function, $args);
        return new Token(Token::Literal, $result);
    }
}