vendor/symfony/var-dumper/Caster/SplCaster.php

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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\VarDumper\Caster;

use Symfony\Component\VarDumper\Cloner\Stub;

/**
 * Casts SPL related classes to array representation.
 *
 * @author Nicolas Grekas <p@tchwork.com>
 *
 * @final since Symfony 4.4
 */
class SplCaster
{
    private static $splFileObjectFlags = [
        \SplFileObject::DROP_NEW_LINE => 'DROP_NEW_LINE',
        \SplFileObject::READ_AHEAD => 'READ_AHEAD',
        \SplFileObject::SKIP_EMPTY => 'SKIP_EMPTY',
        \SplFileObject::READ_CSV => 'READ_CSV',
    ];

    public static function castArrayObject(\ArrayObject $c, array $a, Stub $stub, $isNested)
    {
        return self::castSplArray($c, $a, $stub, $isNested);
    }

    public static function castArrayIterator(\ArrayIterator $c, array $a, Stub $stub, $isNested)
    {
        return self::castSplArray($c, $a, $stub, $isNested);
    }

    public static function castHeap(\Iterator $c, array $a, Stub $stub, $isNested)
    {
        $a += [
            Caster::PREFIX_VIRTUAL.'heap' => iterator_to_array(clone $c),
        ];

        return $a;
    }

    public static function castDoublyLinkedList(\SplDoublyLinkedList $c, array $a, Stub $stub, $isNested)
    {
        $prefix = Caster::PREFIX_VIRTUAL;
        $mode = $c->getIteratorMode();
        $c->setIteratorMode(\SplDoublyLinkedList::IT_MODE_KEEP | $mode & ~\SplDoublyLinkedList::IT_MODE_DELETE);

        $a += [
            $prefix.'mode' => new ConstStub((($mode & \SplDoublyLinkedList::IT_MODE_LIFO) ? 'IT_MODE_LIFO' : 'IT_MODE_FIFO').' | '.(($mode & \SplDoublyLinkedList::IT_MODE_DELETE) ? 'IT_MODE_DELETE' : 'IT_MODE_KEEP'), $mode),
            $prefix.'dllist' => iterator_to_array($c),
        ];