Run PHP-CS-Fixer

.php-cs-fixer.dist.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ * Useful PHP Basics
+ * Copyright (C) 2023 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace PhpCsFixer;
+
+/**
+ * Configuration for PHP-CS-Fixer.
+ * @see https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/blob/master/doc/config.rst
+ *
+ * @return ConfigInterface
+ */
+return (new Config())
+    ->setRiskyAllowed(true)
+    ->setRules([
+        '@PSR12' => true,
+    ])
+    ->setFinder(
+        (new Finder())->in(__DIR__)
+    );

src/DataStructures/StrictList.php

@@ -134,7 +134,7 @@ class StrictList extends SplDoublyLinkedList
      */
     public function isAllowedType(mixed $item): bool
     {
-        if (empty($this->allowedTypes)) {
+        if (count($this->allowedTypes) === 0) {
             return true;
         }
         foreach ($this->allowedTypes as $type) {

src/Traits/Getter.php

@@ -74,7 +74,7 @@ trait Getter
         } catch (InvalidArgumentException) {
             $value = null;
         } finally {
-            return !empty($value);
+            return (bool) $value !== false;
         }
     }
 }

src/Traits/Singleton.php

@@ -54,10 +54,8 @@ trait Singleton
      * This is a singleton class, thus the constructor is private.
      *
      * Usage: Get an instance of this class by calling self::getInstance()
-     *
-     * @param mixed ...$args Constructor parameters
      */
-    abstract private function __construct(mixed ...$args);
+    abstract private function __construct();
 
     /**
      * This is a singleton class, thus cloning is prohibited.