Module `Ocsipersist.Ref_json`

Type-safe persistent references using Deriving_Json for serialisation. Unlike Ref, this does not rely on Stdlib.Marshal and is safe across OCaml versions. Requires types annotated with [@@deriving json] (from js_of_ocaml-ppx_deriving_json).

Type-safe persistent references using Deriving_Json for serialisation.

type 'a t

The type of (persistent or not) references

val ref : ?persistent:string -> 'a Deriving_Json.t -> 'a -> 'a t

ref ?persistent json default creates a reference. If optional parameter ?persistent is absent, the reference will not be persistent (implemented using OCaml references). Otherwise, the value of persistent will be used as key for the value in the persistent reference table. If the reference already exists, the current value is kept.

val get : 'a t -> 'a Lwt.t

Get the value of a reference

val set : 'a t -> 'a -> unit Lwt.t

Set the value of a reference