File vendor/nikic/php-parser/lib/PhpParser/NodeVisitor/ParentConnectingVisitor.php

1:	<?php declare(strict_types=1);
2:
3:	namespace PhpParser\NodeVisitor;
4:
5:	use function array_pop;
6:	use function count;
7:	use PhpParser\Node;
8:	use PhpParser\NodeVisitorAbstract;
9:
10:	/**
11:	* Visitor that connects a child node to its parent node.
12:	*
13:	* On the child node, the parent node can be accessed through
14:	* <code>$node->getAttribute('parent')</code>.
15:	*/
16:	final class ParentConnectingVisitor extends NodeVisitorAbstract
17:	{
18:	/**
19:	* @var Node[]
20:	*/
21:	private $stack = [];
22:
23:	public function beforeTraverse(array $nodes)
24:	{
25:	$this->stack = [];
26:	}
27:
28:	public function enterNode(Node $node)
29:	{
30:	if (!empty($this->stack)) {
31:	$node->setAttribute('parent', $this->stack[count($this->stack) - 1]);
32:	}
33:
34:	$this->stack[] = $node;
35:	}
36:
37:	public function leaveNode(Node $node)
38:	{
39:	array_pop($this->stack);
40:	}
41:	}
42: