function NodeTraverser::traverseForVisitor

1 call to NodeTraverser::traverseForVisitor()

NodeTraverser::traverse in vendor/twig/twig/src/NodeTraverser.php

Traverses a node and calls the registered visitors.

File

vendor/twig/twig/src/NodeTraverser.php, line 60

Class

NodeTraverser

A node traverser.

Namespace

Twig

Code

private function traverseForVisitor(NodeVisitorInterface $visitor, Node $node) : ?Node {
    $node = $visitor->enterNode($node, $this->env);
    foreach ($node as $k => $n) {
        if (null !== ($m = $this->traverseForVisitor($visitor, $n))) {
            if ($m !== $n) {
                $node->setNode($k, $m);
            }
        }
        else {
            $node->removeNode($k);
        }
    }
    return $visitor->leaveNode($node, $this->env);
}