Empty objects disallowed about ppx_yojson HOT 2 CLOSED

Ach, my bad, I should have realized that before filing this. Sorry for the noise ✌️

from ppx_yojson.

OCaml does not allow this syntax (the empty record {}) so we can't support it as the payload of the extension still has to be valid OCaml.

If you need to insert empty objects in otherwise large json values, I would suggest you use antiquotation. Something along those lines:

let empty_object = `Assoc [] in
let json_value = [%yojson {some_field = [%aq empty_object]; some_other_field = ...}] in
...

or simply:

let json_value = [%yojson {some_field = [%aq `Assoc []]; some_other_field = ...}] in
...

Would that work for you?

from ppx_yojson.