Add type to final/internal public/protected properties

Author: nicolas-grekas

Dumper.php

@@ -24,10 +24,8 @@ class Dumper
 {
     /**
      * The amount of spaces to use for indentation of nested nodes.
-     *
-     * @var int
      */
-    protected $indentation;
+    private int $indentation;
 
     public function __construct(int $indentation = 4)
     {

Inline.php

@@ -26,8 +26,8 @@ class Inline
 {
     public const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*+(?:\\\\.[^"\\\\]*+)*+)"|\'([^\']*+(?:\'\'[^\']*+)*+)\')';
 
-    public static $parsedLineNumber = -1;
-    public static $parsedFilename;
+    public static int $parsedLineNumber = -1;
+    public static ?string $parsedFilename = null;
 
     private static bool $exceptionOnInvalidType = false;
     private static bool $objectSupport = false;