Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of Psy Shell.
Chris@0:  *
Chris@0:  * (c) 2012-2017 Justin Hileman
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Psy\CodeCleaner;
Chris@0: 
Chris@0: use PhpParser\Node;
Chris@0: use PhpParser\Node\Stmt\Class_;
Chris@0: use PhpParser\Node\Stmt\ClassMethod;
Chris@0: use PhpParser\Node\Stmt\Namespace_;
Chris@0: use Psy\Exception\FatalErrorException;
Chris@0: 
Chris@0: /**
Chris@0:  * Validate that the old-style constructor function is not static.
Chris@0:  *
Chris@0:  * As of PHP 5.3.3, methods with the same name as the last element of a namespaced class name
Chris@0:  * will no longer be treated as constructor. This change doesn't affect non-namespaced classes.
Chris@0:  *
Chris@0:  * Validation of the __construct method ensures the PHP Parser.
Chris@0:  *
Chris@0:  * @author Martin Hasoň <martin.hason@gmail.com>
Chris@0:  */
Chris@0: class StaticConstructorPass extends CodeCleanerPass
Chris@0: {
Chris@0:     private $isPHP533;
Chris@0:     private $namespace;
Chris@0: 
Chris@0:     public function __construct()
Chris@0:     {
Chris@0:         $this->isPHP533 = version_compare(PHP_VERSION, '5.3.3', '>=');
Chris@0:     }
Chris@0: 
Chris@0:     public function beforeTraverse(array $nodes)
Chris@0:     {
Chris@0:         $this->namespace = array();
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Validate that the old-style constructor function is not static.
Chris@0:      *
Chris@0:      * @throws FatalErrorException if the old-style constructor function is static
Chris@0:      *
Chris@0:      * @param Node $node
Chris@0:      */
Chris@0:     public function enterNode(Node $node)
Chris@0:     {
Chris@0:         if ($node instanceof Namespace_) {
Chris@0:             $this->namespace = isset($node->name) ? $node->name->parts : array();
Chris@0:         } elseif ($node instanceof Class_) {
Chris@0:             // Bail early if this is PHP 5.3.3 and we have a namespaced class
Chris@0:             if (!empty($this->namespace) && $this->isPHP533) {
Chris@0:                 return;
Chris@0:             }
Chris@0: 
Chris@0:             $constructor = null;
Chris@0:             foreach ($node->stmts as $stmt) {
Chris@0:                 if ($stmt instanceof ClassMethod) {
Chris@0:                     // Bail early if we find a new-style constructor
Chris@0:                     if ('__construct' === strtolower($stmt->name)) {
Chris@0:                         return;
Chris@0:                     }
Chris@0: 
Chris@0:                     // We found a possible old-style constructor
Chris@0:                     // (unless there is also a __construct method)
Chris@0:                     if (strtolower($node->name) === strtolower($stmt->name)) {
Chris@0:                         $constructor = $stmt;
Chris@0:                     }
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             if ($constructor && $constructor->isStatic()) {
Chris@0:                 $msg = sprintf(
Chris@0:                     'Constructor %s::%s() cannot be static',
Chris@0:                     implode('\\', array_merge($this->namespace, (array) $node->name)),
Chris@0:                     $constructor->name
Chris@0:                 );
Chris@0:                 throw new FatalErrorException($msg, 0, E_ERROR, null, $node->getLine());
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: }