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(** This module provides result type and functions for compatibility
* with OCaml 4.06 *)
type error =
[ `Premature_end_of_input
| `Unknown_field_type of int
| `Wrong_field_type of string * Field.t
| `Illegal_value of string * Field.t
| `Unknown_enum_value of int
| `Oneof_missing
| `Required_field_missing ]
type 'a t = ('a, error) result
let ( >>| ) v f = match v with Ok x -> Ok (f x) | Error err -> Error err
let ( >>= ) v f = match v with Ok x -> f x | Error err -> Error err
let open_error = function
| Ok _ as v -> v
| Error #error as v -> v
let return x = Ok x
let fail x = Error x
let get ~msg = function
| Ok v -> v
| Error _ -> failwith msg
let pp_error : Format.formatter -> [> error] -> unit = fun fmt -> function
| `Premature_end_of_input ->
Format.pp_print_string fmt
"`Premature_end_of_input"
| `Unknown_field_type x ->
(Format.fprintf fmt
"`Unknown_field_type (@[<hov>";
(Format.fprintf fmt "%d") x;
Format.fprintf fmt "@])")
| `Wrong_field_type x ->
(Format.fprintf fmt
"`Wrong_field_type (@[<hov>";
((fun (a0, a1) ->
Format.fprintf fmt "(@[";
((Format.fprintf fmt "%S") a0;
Format.fprintf fmt ",@ ";
(Field.pp fmt) a1);
Format.fprintf fmt "@])")) x;
Format.fprintf fmt "@])")
| `Illegal_value x ->
(Format.fprintf fmt
"`Illegal_value (@[<hov>";
((fun (a0, a1) ->
Format.fprintf fmt "(@[";
((Format.fprintf fmt "%S") a0;
Format.fprintf fmt ",@ ";
(Field.pp fmt) a1);
Format.fprintf fmt "@])")) x;
Format.fprintf fmt "@])")
| `Unknown_enum_value x ->
(Format.fprintf fmt
"`Unknown_enum_value (@[<hov>";
(Format.fprintf fmt "%d") x;
Format.fprintf fmt "@])")
| `Oneof_missing ->
Format.pp_print_string fmt "`Oneof_missing"
| `Required_field_missing ->
Format.pp_print_string fmt
"`Required_field_missing"
let show_error : error -> string = Format.asprintf "%a" pp_error
let pp pp fmt = function
| Ok v -> Format.fprintf fmt "Ok %a" pp v
| Error (#error as e) -> Format.fprintf fmt "Error %a" pp_error e