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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Util
open Pp
open Errors
open Indtypes
open Type_errors
open Pretype_errors
open Indrec
let print_loc loc =
if Loc.is_ghost loc then
(str"<unknown>")
else
let loc = Loc.unloc loc in
(int (fst loc) ++ str"-" ++ int (snd loc))
let guill s = "\""^s^"\""
(** Invariant : exceptions embedded in EvaluatedError satisfy
Errors.noncritical *)
exception EvaluatedError of std_ppcmds * 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: " ^ txt ^ "."))
| Compat.Token.Error txt -> hov 0 (str ("Syntax error: " ^ txt ^ "."))
| Lexer.Error.E err -> hov 0 (str (Lexer.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.")
| 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 ++ Errors.print reraise
(* Otherwise, not handled here *)
| _ -> raise Errors.Unhandled
let _ = Errors.register_handler explain_exn_default
(** Pre-explain a vernac interpretation error *)
let wrap_vernac_error exn strm =
let e = EvaluatedError (hov 0 (str "Error:" ++ spc () ++ strm), None) in
Exninfo.copy exn e
let rec process_vernac_interp_error exn = match exn with
| Univ.UniverseInconsistency (o,u,v,p) ->
let pr_rel r =
match r with
Univ.Eq -> str"=" | Univ.Lt -> str"<" | Univ.Le -> str"<=" in
let reason = match p with
[] -> mt()
| _::_ ->
str " because" ++ spc() ++ Univ.pr_uni v ++
prlist (fun (r,v) -> spc() ++ pr_rel r ++ str" " ++ Univ.pr_uni v)
p ++
(if Univ.Universe.equal (snd (List.last p)) u then mt() else
(spc() ++ str "= " ++ Univ.pr_uni u)) in
let msg =
if !Constrextern.print_universes then
spc() ++ str "(cannot enforce" ++ spc() ++ Univ.pr_uni u ++ spc() ++
pr_rel o ++ spc() ++ Univ.pr_uni v ++ reason ++ str")"
else
mt() in
wrap_vernac_error exn (str "Universe inconsistency" ++ msg ++ str ".")
| TypeError(ctx,te) ->
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)
| 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,e) ->
wrap_vernac_error exn (Himsg.explain_pattern_matching_error env e)
| Tacred.ReductionTacticError e ->
wrap_vernac_error exn (Himsg.explain_reduction_tactic_error e)
| Logic.RefinerError e ->
wrap_vernac_error exn (Himsg.explain_refiner_error 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.")
| Nametab.GlobalizationConstantError q ->
wrap_vernac_error exn
(str "No constant of this name:" ++ spc () ++
Libnames.pr_qualid q ++ str ".")
| Refiner.FailError (i,s) ->
let s = Lazy.force s in
wrap_vernac_error exn
(str "Tactic failure" ++
(if Pp.is_empty 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 ".")
| Proof_errors.TacticFailure e -> process_vernac_interp_error e
| exc ->
exc
let process_vernac_interp_error exc =
let e = process_vernac_interp_error exc in
let ltac_trace = Exninfo.get exc Proof_type.ltac_trace_info in
let loc = Option.default Loc.ghost (Loc.get_loc e) in
match ltac_trace with
| None -> e
| Some trace ->
match Himsg.extract_ltac_trace trace loc with
| None, loc -> Loc.add_loc e loc
| Some msg, loc -> Loc.add_loc (EvaluatedError (msg, Some e)) loc
let _ = Tactic_debug.explain_logic_error :=
(fun e -> Errors.print (process_vernac_interp_error e))
let _ = Tactic_debug.explain_logic_error_no_anomaly :=
(fun e -> Errors.print_no_report (process_vernac_interp_error e))
|
