Merge branch 'master' into neonxp-ng

3 files changed, 3 insertions, 5 deletions

diff --git a/README.md b/README.md
index 14ede4c..65b9dc2 100644
--- a/README.md
+++ b/README.md
@@ -141,9 +141,7 @@ Or call setDivisionByZeroIsZero
 ```php
 echo $executor->setDivisionByZeroIsZero()->execute('1/0');
 ```
-
 If you want another behavior, you can override division operator:
-
 ```php
 $executor->addOperator("/", false, 180, function($a, $b) {
     if ($b == 0) {
diff --git a/src/NXP/Classes/CustomFunction.php b/src/NXP/Classes/CustomFunction.php
index 636435c..bf36405 100644
--- a/src/NXP/Classes/CustomFunction.php
+++ b/src/NXP/Classes/CustomFunction.php
@@ -32,7 +32,7 @@ class CustomFunction
      * @param int $places
      * @throws ReflectionException
      */
-    public function __construct(string $name, callable $function, int $places = null)
+    public function __construct(string $name, callable $function, ?int $places = null)
     {
         $this->name = $name;
         $this->function = $function;
diff --git a/src/NXP/MathExecutor.php b/src/NXP/MathExecutor.php
index 5a20e17..5fdc78f 100644
--- a/src/NXP/MathExecutor.php
+++ b/src/NXP/MathExecutor.php
@@ -30,7 +30,7 @@ class MathExecutor
      *
      * @var array
      */
-    private $variables = [];
+    public $variables = [];
 
     /**
      * @var Operator[]
@@ -103,7 +103,7 @@ class MathExecutor
             '/' => [
                 function ($a, $b) {
                     if ($b == 0) {
-											throw new DivisionByZeroException();
+                        throw new DivisionByZeroException();
                     }
                     return $a / $b;
                 },