Module Melange_native_ppx.Js_propertiesSource

[@\@deriving jsProperties] generates a constructor function for record types.

This is a native OCaml implementation compatible with melange's jsProperties deriver.

Basic usage

  type person = { name : string; age : int } [@@deriving jsProperties]

  (* Generates: *)
  let person ~name ~age = { name; age }

Optional fields

Fields marked with [@mel.optional] become optional labeled arguments. When any optional field exists, a trailing unit argument is added:

  type config = { host : string; port : int option [@mel.optional] } [@@deriving jsProperties]

  (* Generates: *)
  let config ~host ?port () = { host; port }

Private types

Private types do not generate a constructor (the type cannot be constructed outside the module).