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);
            }
        }
    }