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