Add Macroable trait to RedirectResponse (#16929)

src/Illuminate/Http/RedirectResponse.php

@@ -6,14 +6,17 @@
 use Illuminate\Support\Str;
 use Illuminate\Support\MessageBag;
 use Illuminate\Support\ViewErrorBag;
+use Illuminate\Support\Traits\Macroable;
 use Illuminate\Session\Store as SessionStore;
 use Illuminate\Contracts\Support\MessageProvider;
 use Symfony\Component\HttpFoundation\File\UploadedFile as SymfonyUploadedFile;
 use Symfony\Component\HttpFoundation\RedirectResponse as BaseRedirectResponse;
 
 class RedirectResponse extends BaseRedirectResponse
 {
-    use ResponseTrait;
+    use ResponseTrait, Macroable {
+        Macroable::__call as macroCall;
+    }
 
     /**
      * The request instance.
@@ -204,6 +207,10 @@ public function setSession(SessionStore $session)
      */
     public function __call($method, $parameters)
     {
+        if (static::hasMacro($method)) {
+            return $this->macroCall($method, $parameters);
+        }
+
         if (Str::startsWith($method, 'with')) {
             return $this->with(Str::snake(substr($method, 4)), $parameters[0]);
         }