Subversion-Projekte lars-tiefland.laravel_shop

<?php declare(strict_types=1);

namespace PhpParser\NodeVisitor;

use PhpParser\Node;

use PhpParser\NodeTraverser;

use PhpParser\NodeVisitorAbstract;

/**

 * This visitor can be used to find the first node satisfying some criterion determined by

 * a filter callback.

 */

class FirstFindingVisitor extends NodeVisitorAbstract

{

    /** @var callable Filter callback */

    protected $filterCallback;

    /** @var null|Node Found node */

    protected $foundNode;

    public function __construct(callable $filterCallback) {

        $this->filterCallback = $filterCallback;

    }

    /**

     * Get found node satisfying the filter callback.

     *

     * Returns null if no node satisfies the filter callback.

     *

     * @return null|Node Found node (or null if not found)

     */

    public function getFoundNode() {

        return $this->foundNode;

    }

    public function beforeTraverse(array $nodes) {

        $this->foundNode = null;

        return null;

    }

    public function enterNode(Node $node) {

        $filterCallback = $this->filterCallback;

        if ($filterCallback($node)) {

            $this->foundNode = $node;

            return NodeTraverser::STOP_TRAVERSAL;

        }

        return null;

    }

}