e.ml1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52(*********************************************************************************) (* OCaml-ActivityPub *) (* *) (* Copyright (C) 2023-2024 INRIA All rights reserved. *) (* Author: Maxence Guesdon, INRIA Saclay *) (* *) (* This program is free software; you can redistribute it and/or modify *) (* it under the terms of the GNU Lesser General Public License version *) (* 3 as published by the Free Software Foundation. *) (* *) (* This program is distributed in the hope that it will be useful, *) (* but WITHOUT ANY WARRANTY; without even the implied warranty of *) (* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *) (* GNU General Public License for more details. *) (* *) (* You should have received a copy of the GNU General Public License *) (* along with this program; if not, write to the Free Software *) (* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA *) (* 02111-1307 USA *) (* *) (* Contact: maxence.guesdon@inria.fr *) (* *) (*********************************************************************************) (** Errors. *) (** Extensible error type. When adding a new constructor, do not forget to register a printer with {!register_string_of_error}. *) type error = .. exception Error of error let error e = raise (Error e) let string_of_error_funs = ref [] let register_string_of_error f = string_of_error_funs := f :: !string_of_error_funs let string_of_error = let rec iter e = function | [] -> "No printer for error" | f :: q -> match f e with | Some s -> s | None -> iter e q in fun e -> iter e !string_of_error_funs let pp ppf e = Format.fprintf ppf "%s" (string_of_error e) let () = Printexc.register_printer (function Error e -> Some (string_of_error e) | _ -> None)