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<?php declare(strict_types=1); |
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|
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namespace PhpParser\NodeVisitor; |
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|
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use function array_pop; |
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use function count; |
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use PhpParser\Node; |
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use PhpParser\NodeVisitorAbstract; |
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|
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/** |
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* Visitor that connects a child node to its parent node. |
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* |
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* On the child node, the parent node can be accessed through |
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* <code>$node->getAttribute('parent')</code>. |
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*/ |
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final class ParentConnectingVisitor extends NodeVisitorAbstract |
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{ |
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/** |
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* @var Node[] |
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*/ |
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private $stack = []; |
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|
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public function beforeTraverse(array $nodes) |
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{ |
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$this->stack = []; |
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} |
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|
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public function enterNode(Node $node) |
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{ |
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if (!empty($this->stack)) { |
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$node->setAttribute('parent', $this->stack[count($this->stack) - 1]); |
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} |
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|
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$this->stack[] = $node; |
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} |
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|
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public function leaveNode(Node $node) |
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{ |
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array_pop($this->stack); |
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} |
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} |
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