[HttpFoundation] Support root-level Generator in StreamedJsonResponse

Author: alexandre-daubois

components/http_foundation.rst

@@ -709,6 +709,28 @@ after some specific item count to send the contents to the browser::
         }
     }
 
+You also have the possibility to directly pass any iterable to
+``StreamedJsonResponse``, including generators::
+
+    public function loadArticles(): \Generator
+    {
+         yield ['title' => 'Article 1'];
+         yield ['title' => 'Article 2'];
+         yield ['title' => 'Article 3'];
+    }
+
+    public function __invoke(): Response
+    {
+        // ...
+
+        return new StreamedJsonResponse(loadArticles());
+    }
+
+.. versionadded:: 6.4
+
+    The support for any iterable in ``StreamedJsonResponse`` was introduced in
+    Symfony 6.4.
+
 .. _component-http-foundation-serving-files:
 
 Serving Files