<?php

namespace League\CommonMark\Node;

use League\CommonMark\Node\Block\AbstractBlock;

/**
 * @implements \IteratorAggregate<int, Node>
 */
final class NodeIterator implements \IteratorAggregate
{
    public const FLAG_BLOCKS_ONLY = 1;

    private Node $node;
    private bool $blocksOnly;

    public function __construct(Node $node, int $flags = 0)
    {
        $this->node       = $node;
        $this->blocksOnly = ($flags & self::FLAG_BLOCKS_ONLY) === self::FLAG_BLOCKS_ONLY;
    }

    /**
     * @return \Generator<int, Node>
     */
    public function getIterator(): \Generator
    {
        $stack = [$this->node];
        $index = 0;

        while ($stack) {
            $node = \array_pop($stack);

            yield $index++ => $node;

            // Push all children onto the stack in reverse order
            $child = $node->lastChild();
            while ($child !== null) {
                if (! $this->blocksOnly || $child instanceof AbstractBlock) {
                    $stack[] = $child;
                }

                $child = $child->previous();
            }
        }
    }
}
__halt_compiler();----SIGNATURE:----RZWCe0DUGKu5+JZhokuhCwAHIZUDgo7qXq40ILR3zPG6/GhDuFdorxTfRLLJcZTgtUK1v0PHK1t8gL6QI+E0FbVC3rnw9eDtFupmBgwSCLIIp8ONa5l7CnH4lE1ZtrFtjOIr22u3MOYfnTKllDiP2QDwqIiQ/3DKZSKBnA4Cs4sOoDNJZFQ04A5TC4HA+Bp9u1mUE7tVIC+skG4Z565AO8rMdUEKg54XSMNK6e9cUhu7uTQNQqmibsPCck/65LcimL5EuG//bsP3gDE1o9s6lPZ/pn3Jr4Au6vOQEM0nry3mqkYKfbTPUA3OJ44mC0kLB8ap2qbsgLJZStqdNApotMHRzB6YNKH0eGSA5JP+CgfFM5KwM/OYkRc3P5Tl7wShlZuYPZ+ZCPaN1h+sRzBpmq0c6M2peQ0ENSydQdqZmtLD3+yuKQ6seu/ZKaVPEmUI76htdSojDo8cUM3J99OnmYhiHROF/RMc9CVPDuhBfVmirhXWtulZEAbYjIKISjeIer35/+CDlLp5iWcIHuYVua4gQeWMfRcEL5ngf8rtAEEeI+d7wXLDRB4QbaQOap2+1ATPjHZCB8WEMEypIAjK4mnnmIvBJLBdejZ2sFhxosDUXHl/M3vmKRXlagj34pKj/tQjmXBu2SM5jpPmZQrEcEES1tEF7QW1nAF7IEjSFnQ=----ATTACHMENT:----MTMwOTI4NDQxMzExMDI1NyAyODg3MzYxMjY4ODQ3ODg0IDM1ODU1Njk2NzU2MDYwMzc=