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(*                                                                  *)
(*  The Why3 Verification Platform   /   The Why3 Development Team  *)
(*  Copyright 2010-2017   --   INRIA - CNRS - Paris-Sud University  *)
(*                                                                  *)
(*  This software is distributed under the terms of the GNU Lesser  *)
(*  General Public License version 2.1, with the special exception  *)
(*  on linking described in file LICENSE.                           *)
(*                                                                  *)
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type plugin = string

exception Plugin_Not_Found of plugin * string list

val debug : Debug.flag
(** debug flag for the plugin mechanism (option "--debug
    load_plugin")
    If set [load_plugin] prints on stderr exactly which plugin are loaded.
*)

val load : ?dirs:string list -> plugin -> unit
(* [load_plugin ~dir plugin] looks in the directories [dir] for the
   plugin named [plugin]. It add the extension .cmo or .cmxs to the
   filename according to the compilation used for the main program *)

type plu =
  (* not a plugin extension *)
  | Plubad
  (* good plugin extension *)
  | Plugood
  (* good plugin extension but fail to load *)
  | Plufail of exn
  (* good plugin extension but not tested ( other kind of compilation ) *)
  | Pluother

val check_plugin : plugin -> plu
