package atdgen-codec-runtime

Support for json objects that contain a field that indicates the type of that object. The following

{
  "type": "User",
  "id": "abc123",
  "age": 52
}

gets converted into a pair

[
  "User",
  {
    "type": "User",
    "id": "abc123",
    "age": 52
  }
]

A corresponding ATD type definition is

type obj = [
  | User of user
  | ...
] <json adapter.ocaml="Atdgen_codec_runtime.Json_adapter.Type_field">

type user = {
  id: string;
  age: int;

  (* The following field definition is supported, albeit useless. *)
  type_ <json name="type">: string;
}