Make compatible with PHP<8

src/Node/Expression/CallExpression.php

@@ -19,7 +19,7 @@ use Twig\Util\ReflectionCallable;
 
 abstract class CallExpression extends AbstractExpression
 {
-    private ?ReflectionCallable $reflector = null;
+    private $reflector = null;
 
     protected function compileCallable(Compiler $compiler)
     {
@@ -295,6 +295,10 @@ abstract class CallExpression extends AbstractExpression
 
     private function reflectCallable($callable): ReflectionCallable
     {
-        return $this->reflector ??= new ReflectionCallable($callable, $this->getAttribute('type'), $this->getAttribute('name'));
+        if (!$this->reflector) {
+            $this->reflector = new ReflectionCallable($callable, $this->getAttribute('type'), $this->getAttribute('name'));
+        }
+
+        return $this->reflector;
     }
 }

src/Util/ReflectionCallable.php

@@ -18,9 +18,9 @@ namespace Twig\Util;
  */
 final class ReflectionCallable
 {
-    private \ReflectionFunctionAbstract $reflector;
+    private $reflector;
-    private \Closure|string|array|null $callable = null;
+    private $callable = null;
-    private string $name;
+    private $name;
 
     public function __construct($callable, string $debugType = 'unknown', string $debugName = 'unknown')
     {
@@ -74,7 +74,7 @@ final class ReflectionCallable
         return $this->reflector;
     }
 
-    public function getCallable(): \Closure|string|array|null
+    public function getCallable()
     {
         return $this->callable;
     }