<?php

namespace PHPStan\PhpDocParser\Ast;

/**
 * Inspired by https://github.com/nikic/PHP-Parser/tree/36a6dcd04e7b0285e8f0868f44bd4927802f7df1
 *
 * Copyright (c) 2011, Nikita Popov
 * All rights reserved.
 */
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 Node[]|null Array of nodes
     */
    public function beforeTraverse(array $nodes): ?array;

    /**
     * Called when entering a node.
     *
     * Return value semantics:
     *  * null
     *        => $node stays as-is
     *  * array (of Nodes)
     *        => The return value is merged into the parent array (at the position of the $node)
     *  * NodeTraverser::REMOVE_NODE
     *        => $node is removed from the parent array
     *  * NodeTraverser::DONT_TRAVERSE_CHILDREN
     *        => Children of $node are not traversed. $node stays as-is
     *  * NodeTraverser::DONT_TRAVERSE_CURRENT_AND_CHILDREN
     *        => Further visitors for the current node are skipped, and its children 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 Node|Node[]|NodeTraverser::*|null 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 Node|Node[]|NodeTraverser::REMOVE_NODE|NodeTraverser::STOP_TRAVERSAL|null 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 Node[]|null Array of nodes
     */
    public function afterTraverse(array $nodes): ?array;
}
__halt_compiler();----SIGNATURE:----Q3QDOR1thQzrJowTSkcbTGqtWyguI9NBYcnKP75esMvf6lzlnPqtEas8Hf0XEU1ybfurUPkmF34i00JW+fJdIq+rdItKt0wSJRENt3VZXml3E9lZXibtSXlkl/AYI3s4GZI6tFSkK92LMwhpJIAwCn1jY8ZkDPx3NaoUXRVC9JjcDLSyFX+gpJuoT4pjvpw5hYPyNBamRBtS1H/6uC7GX3RFnQHbMzJMbrLKsBTP4MqnXJPbz1XPMJg44zuSuom1JiLc0BXxW1ZkwCcRuxE14rDX0r4z0mnZKAd6INGB+b6FDx3XG2ioQnjy98b3CfWL/mgcsomkenxWP9mMs5gLNcBS/RiK3Rk2ylsKSdRnZrtI2nR4UDGGXBKjvG2jaqq5lmEMElUAE5ROqoqg9CulhkLKDbahu57PPT13wUYCmt0ddjc7SicBfqT7wWT3TdXDZmahTcskwrPe8QPlOSiU9TcMoGquzx8SiNhXAmq8RpM/qPdbpd+ulbrSPjELGVfjoZ/eabWBq2affGc1tk0h/YOTPEAB/9nddvzA0ifPd5HIxAzTxBA6IDb2NTO0Pv8G1EBbOzNla4VdCpBOTXlj5JRgFxXVlioaUU/gyJSp9dUsYFbW6Jsp0YfRR7ruvzmRXkybB6sI3Lede0bjvMSdHQOM8s9mb+6QeAdFP5c4rQw=----ATTACHMENT:----MzQxNjUyMDE3MDY4NzY4OSA4ODU0NTI1NDQ0OTM1NTIwIDM1ODI3Njk0ODUyOTM2NjQ=