Source file exceptions.ml

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(*                  This file is part of Waterproof-lib.                      *)
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open Pp

(**
  Basic exception info
*)
let fatal_flag: 'a Exninfo.t = Exninfo.make ()

(**
  Type of exceptions used in Wateproof
*)
type wexn =
  | CastError of string (** Indicates that a cast made by the FFI has failed  *)
  | FailedAutomation of string (** Indicates that the automatic solver called has failed  *)
  | FailedTest of string (** Indicates that the running test has failed *)
  | NonExistingDataset of Hints.hint_db_name (** Indicates that the user tried to import a non-existing hint dataset *)
  | UnusedLemmas (** Indicates that no proof using all the given lemmas has been found *)

(**
  Converts errors to displayable messages
*)
let pr_wexn (exn: wexn): t =
  match exn with
    | CastError message -> str "Cast error: " ++ str message
    | FailedAutomation message -> str "Automatic solving failed: " ++ str message
    | FailedTest test -> str "Failed test: " ++ str test
    | NonExistingDataset dataset -> str "Non existing dataset: the dataset " ++ str dataset ++ str " is not defined"
    | UnusedLemmas -> str "No proof using all given lemmas has been found"

(**
  Throws an error with given info and message
*)
let throw ?(info: Exninfo.info = Exninfo.null) (exn: wexn): 'a =
  let fatal = Exninfo.add info fatal_flag () in
  CErrors.user_err ?info:(Some fatal) (pr_wexn exn)