Add types to public and protected properties

Author: nicolas-grekas

Expression.php

@@ -18,7 +18,7 @@
  */
 class Expression
 {
-    protected $expression;
+    protected string $expression;
 
     public function __construct(string $expression)
     {

Node/Node.php

@@ -20,8 +20,8 @@
  */
 class Node
 {
-    public $nodes = [];
-    public $attributes = [];
+    public array $nodes = [];
+    public array $attributes = [];
 
     /**
      * @param array $nodes      An array of nodes

Token.php

@@ -18,9 +18,9 @@
  */
 class Token
 {
-    public $value;
-    public $type;
-    public $cursor;
+    public string $type;
+    public string|int|float|null $value;
+    public ?int $cursor;
 
     public const EOF_TYPE = 'end of expression';
     public const NAME_TYPE = 'name';

TokenStream.php

@@ -18,7 +18,7 @@
  */
 class TokenStream
 {
-    public $current;
+    public Token $current;
 
     private array $tokens;
     private int $position = 0;