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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 Compat
open Pp
open Util
open Indtypes
open Type_errors
open Pretype_errors
open Indrec
let print_loc loc =
if loc = dummy_loc then
(str"<unknown>")
else
let loc = unloc loc in
(int (fst loc) ++ str"-" ++ int (snd loc))
let guill s = "\""^s^"\""
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 ^ "."))
| 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.")
(* Meta-exceptions *)
| Loc.Exc_located (loc,exc) ->
hov 0 ((if loc = dummy_loc then (mt ())
else (str"At location " ++ print_loc loc ++ str":" ++ fnl ()))
++ Errors.print_no_anomaly exc)
| EvaluatedError (msg,None) -> msg
| EvaluatedError (msg,Some reraise) -> msg ++ Errors.print_no_anomaly 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 strm =
EvaluatedError (hov 0 (str "Error:" ++ spc () ++ strm), None)
let rec process_vernac_interp_error = function
| Univ.UniverseInconsistency (o,u,v) ->
let msg =
if !Constrextern.print_universes then
spc() ++ str "(cannot enforce" ++ spc() ++ Univ.pr_uni u ++ spc() ++
str (match o with Univ.Lt -> "<" | Univ.Le -> "<=" | Univ.Eq -> "=")
++ spc() ++ Univ.pr_uni v ++ str")"
else
mt() in
wrap_vernac_error (str "Universe inconsistency" ++ msg ++ str ".")
| TypeError(ctx,te) ->
wrap_vernac_error (Himsg.explain_type_error ctx Evd.empty te)
| PretypeError(ctx,sigma,te) ->
wrap_vernac_error (Himsg.explain_pretype_error ctx sigma te)
| Typeclasses_errors.TypeClassError(env, te) ->
wrap_vernac_error (Himsg.explain_typeclass_error env te)
| InductiveError e ->
wrap_vernac_error (Himsg.explain_inductive_error e)
| Modops.ModuleTypingError e ->
wrap_vernac_error (Himsg.explain_module_error e)
| Modintern.ModuleInternalizationError e ->
wrap_vernac_error (Himsg.explain_module_internalization_error e)
| RecursionSchemeError e ->
wrap_vernac_error (Himsg.explain_recursion_scheme_error e)
| Cases.PatternMatchingError (env,e) ->
wrap_vernac_error (Himsg.explain_pattern_matching_error env e)
| Tacred.ReductionTacticError e ->
wrap_vernac_error (Himsg.explain_reduction_tactic_error e)
| Logic.RefinerError e ->
wrap_vernac_error (Himsg.explain_refiner_error e)
| Nametab.GlobalizationError q ->
wrap_vernac_error
(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
(str "No constant of this name:" ++ spc () ++
Libnames.pr_qualid q ++ str ".")
| Refiner.FailError (i,s) ->
wrap_vernac_error
(str "Tactic failure" ++
(if Lazy.force s <> mt() then str ":" ++ Lazy.force s else mt ()) ++
if i=0 then str "." else str " (level " ++ int i ++ str").")
| AlreadyDeclared msg ->
wrap_vernac_error (msg ++ str ".")
| Proof_type.LtacLocated (_,(Refiner.FailError (i,s) as exc)) when Lazy.force s <> mt () ->
process_vernac_interp_error exc
| Proof_type.LtacLocated (s,exc) ->
EvaluatedError (hov 0 (Himsg.explain_ltac_call_trace s ++ fnl()),
Some (process_vernac_interp_error exc))
| Loc.Exc_located (loc,exc) ->
Loc.Exc_located (loc,process_vernac_interp_error exc)
| exc ->
exc
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))
|
