[ClassLoader][Routing] Fix namespace parsing on php 8.

Author: derrabus

Loader/AnnotationFileLoader.php

@@ -97,6 +97,11 @@ protected function findClass($file)
             throw new \InvalidArgumentException(sprintf('The file "%s" does not contain PHP code. Did you forgot to add the "<?php" start tag at the beginning of the file?', $file));
         }
 
+        $nsTokens = [T_NS_SEPARATOR => true, T_STRING => true];
+        if (\defined('T_NAME_QUALIFIED')) {
+            $nsTokens[T_NAME_QUALIFIED] = true;
+        }
+
         for ($i = 0; isset($tokens[$i]); ++$i) {
             $token = $tokens[$i];
 
@@ -108,9 +113,9 @@ protected function findClass($file)
                 return $namespace.'\\'.$token[1];
             }
 
-            if (true === $namespace && T_STRING === $token[0]) {
+            if (true === $namespace && isset($nsTokens[$token[0]])) {
                 $namespace = $token[1];
-                while (isset($tokens[++$i][1]) && \in_array($tokens[$i][0], [T_NS_SEPARATOR, T_STRING])) {
+                while (isset($tokens[++$i][1], $nsTokens[$tokens[$i][0]])) {
                     $namespace .= $tokens[$i][1];
                 }
                 $token = $tokens[$i];