Rwo: @@deriving fields example

Learning
1

Code:

module Logon = struct
  type t =
    { session_id: string;
      time: Time_ns.t;
      user: string;
      credentials: string;
    }
  [@@deriving fields]
end;;

let f = Logon.user;; (* added by me *)

Link: Records - Real World OCaml

When I try to compile the above, I get an error of: “Unbound value Logon.user”

project/lib/dune looks like:

(library
  (name my_web)
  (modes byte)
  (libraries 
    httpaf httpaf-lwt-unix lwt lwt.unix
    ppx_jane re
    ppx_fields_conv
    core core_unix core_unix.sys_unix
    stdio base ))

What am I doing wrong ?

I’m using ocaml 5.0.0