Use getClass to make it extensible

Author: GromNaN

src/Extension/AttributeExtension.php

@@ -78,20 +78,20 @@ public function getLastModified(): int
     {
         return max(
             filemtime(__FILE__),
-            is_file($filename = (new \ReflectionClass($this->class))->getFileName()) ? filemtime($filename) : 0,
+            is_file($filename = (new \ReflectionClass($this->getClass()))->getFileName()) ? filemtime($filename) : 0,
         );
     }
 
     private function initFromAttributes(): void
     {
         $filters = $functions = $tests = [];
-        $reflectionClass = new \ReflectionClass($this->class);
+        $reflectionClass = new \ReflectionClass($this->getClass());
         foreach ($reflectionClass->getMethods() as $method) {
             foreach ($method->getAttributes(AsTwigFilter::class) as $reflectionAttribute) {
                 /** @var AsTwigFilter $attribute */
                 $attribute = $reflectionAttribute->newInstance();
 
-                $callable = new TwigFilter($attribute->name, [$this->class, $method->getName()], [
+                $callable = new TwigFilter($attribute->name, [$reflectionClass->name, $method->getName()], [
                     'needs_context' => $attribute->needsContext ?? false,
                     'needs_environment' => $attribute->needsEnvironment ?? $this->needsEnvironment($method),
                     'needs_charset' => $attribute->needsCharset ?? false,
@@ -114,7 +114,7 @@ private function initFromAttributes(): void
                 /** @var AsTwigFunction $attribute */
                 $attribute = $reflectionAttribute->newInstance();
 
-                $callable = new TwigFunction($attribute->name, [$this->class, $method->getName()], [
+                $callable = new TwigFunction($attribute->name, [$reflectionClass->name, $method->getName()], [
                     'needs_context' => $attribute->needsContext ?? false,
                     'needs_environment' => $attribute->needsEnvironment ?? $this->needsEnvironment($method),
                     'needs_charset' => $attribute->needsCharset ?? false,
@@ -136,7 +136,7 @@ private function initFromAttributes(): void
                 /** @var AsTwigTest $attribute */
                 $attribute = $reflectionAttribute->newInstance();
 
-                $callable = new TwigTest($attribute->name, [$this->class, $method->getName()], [
+                $callable = new TwigTest($attribute->name, [$reflectionClass->name, $method->getName()], [
                     'needs_context' => $attribute->needsContext ?? false,
                     'needs_environment' => $attribute->needsEnvironment ?? $this->needsEnvironment($method),
                     'needs_charset' => $attribute->needsCharset ?? false,