1 files changed, 9 insertions, 24 deletions
diff --git a/src/NXP/Classes/Operator.php b/src/NXP/Classes/Operator.php
index 1b1acc4..7dee06d 100644
--- a/src/NXP/Classes/Operator.php
+++ b/src/NXP/Classes/Operator.php
@@ -7,37 +7,21 @@ use ReflectionFunction;
 
 class Operator
 {
-    /**
-     * @var string
-     */
-    public $operator;
+    public string $operator = '';
 
-    /**
-     * @var bool
-     */
-    public $isRightAssoc;
+    public bool $isRightAssoc = false;
 
-    /**
-     * @var int
-     */
-    public $priority;
+    public int $priority = 0;
 
     /**
      * @var callable(\SplStack)
      */
     public $function;
 
-    /**
-     * @var int
-     */
-    public $places;
+    public int $places = 0;
 
     /**
      * Operator constructor.
-     * @param string $operator
-     * @param bool $isRightAssoc
-     * @param int $priority
-     * @param callable $function
      */
     public function __construct(string $operator, bool $isRightAssoc, int $priority, callable $function)
     {
@@ -54,17 +38,18 @@ class Operator
      *
      * @throws IncorrectExpressionException
      */
-    public function execute(array &$stack): Token
+    public function execute(array &$stack) : Token
     {
-        if (count($stack) < $this->places) {
+        if (\count($stack) < $this->places) {
             throw new IncorrectExpressionException();
         }
         $args = [];
+
         for ($i = 0; $i < $this->places; $i++) {
-            array_unshift($args, array_pop($stack)->value);
+            \array_unshift($args, \array_pop($stack)->value);
         }
 
-        $result = call_user_func_array($this->function, $args);
+        $result = \call_user_func_array($this->function, $args);
 
         return new Token(Token::Literal, $result);
     }