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./othercms/croogo-4.0.7/vendor/nikic/php-parser/lib/PhpParser/NodeVisitor.php
<?php declare(strict_types=1);

namespace
PhpParser;

interface
NodeVisitor
{
   
/**
     * Called once before traversal.
     *
     * Return value semantics:
     *  * null:      $nodes stays as-is
     *  * otherwise: $nodes is set to the return value
     *
     * @param Node[] $nodes Array of nodes
     *
     * @return null|Node[] Array of nodes
     */
   
public function beforeTraverse(array $nodes);

   
/**
     * Called when entering a node.
     *
     * Return value semantics:
     *  * null
     *        => $node stays as-is
     *  * NodeTraverser::DONT_TRAVERSE_CHILDREN
     *        => Children of $node are not traversed. $node stays as-is
     *  * NodeTraverser::STOP_TRAVERSAL
     *        => Traversal is aborted. $node stays as-is
     *  * otherwise
     *        => $node is set to the return value
     *
     * @param Node $node Node
     *
     * @return null|int|Node Replacement node (or special return value)
     */
   
public function enterNode(Node $node);

   
/**
     * Called when leaving a node.
     *
     * Return value semantics:
     *  * null
     *        => $node stays as-is
     *  * NodeTraverser::REMOVE_NODE
     *        => $node is removed from the parent array
     *  * NodeTraverser::STOP_TRAVERSAL
     *        => Traversal is aborted. $node stays as-is
     *  * array (of Nodes)
     *        => The return value is merged into the parent array (at the position of the $node)
     *  * otherwise
     *        => $node is set to the return value
     *
     * @param Node $node Node
     *
     * @return null|int|Node|Node[] Replacement node (or special return value)
     */
   
public function leaveNode(Node $node);

   
/**
     * Called once after traversal.
     *
     * Return value semantics:
     *  * null:      $nodes stays as-is
     *  * otherwise: $nodes is set to the return value
     *
     * @param Node[] $nodes Array of nodes
     *
     * @return null|Node[] Array of nodes
     */
   
public function afterTraverse(array $nodes);
}