Primo Committ

vendor/psy/psysh/src/CodeCleaner/ValidConstructorPass.php

@@ -0,0 +1,112 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2022 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\Identifier;
+use PhpParser\Node\Stmt\Class_;
+use PhpParser\Node\Stmt\ClassMethod;
+use PhpParser\Node\Stmt\Namespace_;
+use Psy\Exception\FatalErrorException;
+
+/**
+ * Validate that the constructor method is not static, and does not have a
+ * return type.
+ *
+ * Checks both explicit __construct methods as well as old-style constructor
+ * methods with the same name as the class (for non-namespaced classes).
+ *
+ * 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.
+ *
+ * @author Martin Hasoň <martin.hason@gmail.com>
+ */
+class ValidConstructorPass extends CodeCleanerPass
+{
+    private $namespace;
+
+    public function beforeTraverse(array $nodes)
+    {
+        $this->namespace = [];
+    }
+
+    /**
+     * Validate that the constructor is not static and does not have a return type.
+     *
+     * @throws FatalErrorException the constructor function is static
+     * @throws FatalErrorException the constructor function has a return type
+     *
+     * @param Node $node
+     */
+    public function enterNode(Node $node)
+    {
+        if ($node instanceof Namespace_) {
+            $this->namespace = isset($node->name) ? $node->name->parts : [];
+        } elseif ($node instanceof Class_) {
+            $constructor = null;
+            foreach ($node->stmts as $stmt) {
+                if ($stmt instanceof ClassMethod) {
+                    // If we find a new-style constructor, no need to look for the old-style
+                    if ('__construct' === \strtolower($stmt->name)) {
+                        $this->validateConstructor($stmt, $node);
+
+                        return;
+                    }
+
+                    // We found a possible old-style constructor (unless there is also a __construct method)
+                    if (empty($this->namespace) && \strtolower($node->name) === \strtolower($stmt->name)) {
+                        $constructor = $stmt;
+                    }
+                }
+            }
+
+            if ($constructor) {
+                $this->validateConstructor($constructor, $node);
+            }
+        }
+    }
+
+    /**
+     * @throws FatalErrorException the constructor function is static
+     * @throws FatalErrorException the constructor function has a return type
+     *
+     * @param Node $constructor
+     * @param Node $classNode
+     */
+    private function validateConstructor(Node $constructor, Node $classNode)
+    {
+        if ($constructor->isStatic()) {
+            // For PHP Parser 4.x
+            $className = $classNode->name instanceof Identifier ? $classNode->name->toString() : $classNode->name;
+
+            $msg = \sprintf(
+                'Constructor %s::%s() cannot be static',
+                \implode('\\', \array_merge($this->namespace, (array) $className)),
+                $constructor->name
+            );
+            throw new FatalErrorException($msg, 0, \E_ERROR, null, $classNode->getLine());
+        }
+
+        if (\method_exists($constructor, 'getReturnType') && $constructor->getReturnType()) {
+            // For PHP Parser 4.x
+            $className = $classNode->name instanceof Identifier ? $classNode->name->toString() : $classNode->name;
+
+            $msg = \sprintf(
+                'Constructor %s::%s() cannot declare a return type',
+                \implode('\\', \array_merge($this->namespace, (array) $className)),
+                $constructor->name
+            );
+            throw new FatalErrorException($msg, 0, \E_ERROR, null, $classNode->getLine());
+        }
+    }
+}