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

1:	<?php declare(strict_types=1);
2:
3:	namespace PhpParser\NodeVisitor;
4:
5:	use PhpParser\Node;
6:	use PhpParser\NodeVisitorAbstract;
7:
8:	/**
9:	* Visitor that connects a child node to its parent node
10:	* as well as its sibling nodes.
11:	*
12:	* On the child node, the parent node can be accessed through
13:	* <code>$node->getAttribute('parent')</code>, the previous
14:	* node can be accessed through <code>$node->getAttribute('previous')</code>,
15:	* and the next node can be accessed through <code>$node->getAttribute('next')</code>.
16:	*/
17:	final class NodeConnectingVisitor extends NodeVisitorAbstract {
18:	/**
19:	* @var Node[]
20:	*/
21:	private array $stack = [];
22:
23:	/**
24:	* @var ?Node
25:	*/
26:	private $previous;
27:
28:	public function beforeTraverse(array $nodes) {
29:	$this->stack = [];
30:	$this->previous = null;
31:	}
32:
33:	public function enterNode(Node $node) {
34:	if (!empty($this->stack)) {
35:	$node->setAttribute('parent', $this->stack[count($this->stack) - 1]);
36:	}
37:
38:	if ($this->previous !== null && $this->previous->getAttribute('parent') === $node->getAttribute('parent')) {
39:	$node->setAttribute('previous', $this->previous);
40:	$this->previous->setAttribute('next', $node);
41:	}
42:
43:	$this->stack[] = $node;
44:	}
45:
46:	public function leaveNode(Node $node) {
47:	$this->previous = $node;
48:
49:	array_pop($this->stack);
50:	}
51:	}
52: