Merge pull request #34 from staabm/const-arr

Tokenizer: Use const array

Author: theseer

src/Tokenizer.php

@@ -8,7 +8,7 @@ class Tokenizer {
      *
      * @var array
      */
-    private $map = [
+    private const MAP = [
         '(' => 'T_OPEN_BRACKET',
         ')' => 'T_CLOSE_BRACKET',
         '[' => 'T_OPEN_SQUARE',
@@ -58,7 +58,7 @@ public function parse(string $source): TokenCollection {
             if (\is_string($tok)) {
                 $token = new Token(
                     $lastToken->getLine(),
-                    $this->map[$tok],
+                    self::MAP[$tok],
                     $tok
                 );
                 $result->addToken($token);
@@ -146,4 +146,4 @@ private function fillBlanks(TokenCollection $tokens, int $maxLine): TokenCollect
 
         return $final;
     }
-}
+}