IO (ez_api.EzAPI.Service.IO)

type _ io =

| Empty : unit io
| Json : 'a Json_encoding.encoding -> 'a io
| Raw : Mime.t list -> string io

val to_string : 'a. 'a io -> 'a -> string

val from_string : 
  'a. 'a io ->
  ('a -> 'b) ->
  string ->
  ('b, [> EzEncoding.destruct_error ]) Stdlib.result

val res_from_string : 
  'a. 'a io ->
  ('a Json_encoding.encoding -> ('a, 'e) Stdlib.result Json_encoding.encoding) ->
  (('a, 'e) Stdlib.result -> 'b) ->
  string ->
  ('b, [> EzEncoding.destruct_error ]) Stdlib.result

val is_empty : 'a. 'a io -> bool