<?php

namespace PhpParser\Node;

use PhpParser\NodeAbstract;

class Arg extends NodeAbstract
{
    /** @var Expr Value to pass */
    public $value;
    /** @var bool Whether to pass by ref */
    public $byRef;
    /** @var bool Whether to unpack the argument */
    public $unpack;

    /**
     * Constructs a function call argument node.
     *
     * @param Expr  $value      Value to pass
     * @param bool  $byRef      Whether to pass by ref
     * @param bool  $unpack     Whether to unpack the argument
     * @param array $attributes Additional attributes
     */
    public function __construct(Expr $value, $byRef = false, $unpack = false, array $attributes = array()) {
        parent::__construct($attributes);
        $this->value = $value;
        $this->byRef = $byRef;
        $this->unpack = $unpack;
    }

    public function getSubNodeNames() {
        return array('value', 'byRef', 'unpack');
    }
}