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|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
open Pp
open CErrors
open Indtypes
open Type_errors
open Pretype_errors
open Indrec
let guill s = str "\"" ++ str s ++ str "\""
(** Invariant : exceptions embedded in EvaluatedError satisfy
Errors.noncritical *)
exception EvaluatedError of Pp.t * exn option
(** Registration of generic errors
Nota: explain_exn does NOT end with a newline anymore!
*)
let explain_exn_default = function
(* Basic interaction exceptions *)
| Stream.Error txt -> hov 0 (str "Syntax error: " ++ str txt ++ str ".")
| Token.Error txt -> hov 0 (str "Syntax error: " ++ str txt ++ str ".")
| CLexer.Error.E err -> hov 0 (str (CLexer.Error.to_string err))
| Sys_error msg -> hov 0 (str "System error: " ++ guill msg)
| Out_of_memory -> hov 0 (str "Out of memory.")
| Stack_overflow -> hov 0 (str "Stack overflow.")
| Dynlink.Error e -> hov 0 (str "Dynlink error: " ++ str Dynlink.(error_message e))
| Timeout -> hov 0 (str "Timeout!")
| Sys.Break -> hov 0 (fnl () ++ str "User interrupt.")
(* Exceptions with pre-evaluated error messages *)
| EvaluatedError (msg,None) -> msg
| EvaluatedError (msg,Some reraise) -> msg ++ CErrors.print reraise
(* Otherwise, not handled here *)
| _ -> raise CErrors.Unhandled
let _ = CErrors.register_handler explain_exn_default
(** Pre-explain a vernac interpretation error *)
let wrap_vernac_error (exn, info) strm = (EvaluatedError (strm, None), info)
let process_vernac_interp_error exn = match fst exn with
| Univ.UniverseInconsistency i ->
let msg =
if !Constrextern.print_universes then
str "." ++ spc() ++
Univ.explain_universe_inconsistency UnivNames.pr_with_global_universes i
else
mt() in
wrap_vernac_error exn (str "Universe inconsistency" ++ msg ++ str ".")
| TypeError(ctx,te) ->
let te = Himsg.map_ptype_error EConstr.of_constr te in
wrap_vernac_error exn (Himsg.explain_type_error ctx Evd.empty te)
| PretypeError(ctx,sigma,te) ->
wrap_vernac_error exn (Himsg.explain_pretype_error ctx sigma te)
| Typeclasses_errors.TypeClassError(env, te) ->
wrap_vernac_error exn (Himsg.explain_typeclass_error env te)
| Implicit_quantifiers.MismatchedContextInstance(e,c,l,x) ->
wrap_vernac_error exn (Himsg.explain_mismatched_contexts e c l x)
| InductiveError e ->
wrap_vernac_error exn (Himsg.explain_inductive_error e)
| Modops.ModuleTypingError e ->
wrap_vernac_error exn (Himsg.explain_module_error e)
| Modintern.ModuleInternalizationError e ->
wrap_vernac_error exn (Himsg.explain_module_internalization_error e)
| RecursionSchemeError e ->
wrap_vernac_error exn (Himsg.explain_recursion_scheme_error e)
| Cases.PatternMatchingError (env,sigma,e) ->
wrap_vernac_error exn (Himsg.explain_pattern_matching_error env sigma e)
| Tacred.ReductionTacticError e ->
wrap_vernac_error exn (Himsg.explain_reduction_tactic_error e)
| Logic.RefinerError (env, sigma, e) ->
wrap_vernac_error exn (Himsg.explain_refiner_error env sigma e)
| Nametab.GlobalizationError q ->
wrap_vernac_error exn
(str "The reference" ++ spc () ++ Libnames.pr_qualid q ++
spc () ++ str "was not found" ++
spc () ++ str "in the current" ++ spc () ++ str "environment.")
| Refiner.FailError (i,s) ->
let s = Lazy.force s in
wrap_vernac_error exn
(str "Tactic failure" ++
(if Pp.ismt s then s else str ": " ++ s) ++
if Int.equal i 0 then str "." else str " (level " ++ int i ++ str").")
| AlreadyDeclared msg ->
wrap_vernac_error exn (msg ++ str ".")
| _ ->
exn
let rec strip_wrapping_exceptions = function
| Logic_monad.TacticFailure e ->
strip_wrapping_exceptions e
| exc -> exc
let additional_error_info = ref []
let register_additional_error_info f =
additional_error_info := f :: !additional_error_info
let process_vernac_interp_error ?(allow_uncaught=true) (exc, info) =
let exc = strip_wrapping_exceptions exc in
let e = process_vernac_interp_error (exc, info) in
let () =
if not allow_uncaught && not (CErrors.handled (fst e)) then
let (e, info) = e in
let msg = str "Uncaught exception " ++ str (Printexc.to_string e) ++ str "." in
let err = CErrors.make_anomaly msg in
Util.iraise (err, info)
in
let e' =
try Some (CList.find_map (fun f -> f e) !additional_error_info)
with _ -> None
in
let add_loc_opt ?loc info = Option.cata (fun l -> Loc.add_loc info l) info loc in
match e' with
| None -> e
| Some (loc, None) -> (fst e, add_loc_opt ?loc (snd e))
| Some (loc, Some msg) ->
(EvaluatedError (msg, Some (fst e)), add_loc_opt ?loc (snd e))
|
