(* * Copyright (c) 2017 - present Facebook, Inc. * All rights reserved. * * This source code is licensed under the BSD style license found in the * LICENSE file in the root directory of this source tree. An additional grant * of patent rights can be found in the PATENTS file in the same directory. *) open! IStd type machine_readable_version = float type human_readable_version = string type t = machine_readable_version * human_readable_version val version_of : string -> human_readable_version option val pp_diff_of_version_opt : Format.formatter -> (human_readable_version option * human_readable_version option) -> unit