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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2011 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id: cerrors.ml 15025 2012-03-09 14:27:07Z glondu $ *)
open Pp
open Util
open Indtypes
open Type_errors
open Pretype_errors
open Indrec
open Lexer
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^"\""
let where s =
if !Flags.debug then (str"in " ++ str s ++ str":" ++ spc ()) else (mt ())
exception EvaluatedError of std_ppcmds * exn option
(* assumption : explain_sys_exn does NOT end with a 'FNL anymore! *)
let rec explain_exn_default_aux anomaly_string report_fn = function
| Stream.Failure ->
hov 0 (anomaly_string () ++ str "uncaught Stream.Failure.")
| Stream.Error txt ->
hov 0 (str "Syntax error: " ++ str txt ++ str ".")
| Token.Error txt ->
hov 0 (str "Syntax error: " ++ str txt ++ str ".")
| Sys_error msg ->
hov 0 (anomaly_string () ++ str "uncaught exception Sys_error " ++ str (guill msg) ++ report_fn ())
| UserError(s,pps) ->
hov 0 (str "Error: " ++ where s ++ pps)
| Out_of_memory ->
hov 0 (str "Out of memory.")
| Stack_overflow ->
hov 0 (str "Stack overflow.")
| Timeout ->
hov 0 (str "Timeout!")
| Anomaly (s,pps) ->
hov 0 (anomaly_string () ++ where s ++ pps ++ report_fn ())
| AnomalyOnError (s,exc) ->
hov 0 (anomaly_string () ++ str s ++ str ". Received exception is:" ++
fnl() ++ explain_exn_default_aux anomaly_string report_fn exc)
| Match_failure(filename,pos1,pos2) ->
hov 0 (anomaly_string () ++ str "Match failure in file " ++ str (guill filename) ++
if Sys.ocaml_version = "3.06" then
(str " from character " ++ int pos1 ++
str " to " ++ int pos2)
else
(str " at line " ++ int pos1 ++
str " character " ++ int pos2)
++ report_fn ())
| Not_found ->
hov 0 (anomaly_string () ++ str "uncaught exception Not_found" ++ report_fn ())
| Failure s ->
hov 0 (anomaly_string () ++ str "uncaught exception Failure " ++ str (guill s) ++ report_fn ())
| Invalid_argument s ->
hov 0 (anomaly_string () ++ str "uncaught exception Invalid_argument " ++ str (guill s) ++ report_fn ())
| Sys.Break ->
hov 0 (fnl () ++ str "User interrupt.")
| Lexer.Error Illegal_character ->
hov 0 (str "Syntax error: Illegal character.")
| Lexer.Error Unterminated_comment ->
hov 0 (str "Syntax error: Unterminated comment.")
| Lexer.Error Unterminated_string ->
hov 0 (str "Syntax error: Unterminated string.")
| Lexer.Error Undefined_token ->
hov 0 (str "Syntax error: Undefined token.")
| Lexer.Error (Bad_token s) ->
hov 0 (str "Syntax error: Bad token" ++ spc () ++ str s ++ str ".")
| Compat.Exc_located (loc,exc) ->
hov 0 ((if loc = dummy_loc then (mt ())
else (str"At location " ++ print_loc loc ++ str":" ++ fnl ()))
++ explain_exn_default_aux anomaly_string report_fn exc)
| Assert_failure (s,b,e) ->
hov 0 (anomaly_string () ++ str "assert failure" ++ spc () ++
(if s <> "" then
if Sys.ocaml_version = "3.06" then
(str ("(file \"" ^ s ^ "\", characters ") ++
int b ++ str "-" ++ int e ++ str ")")
else
(str ("(file \"" ^ s ^ "\", line ") ++ int b ++
str ", characters " ++ int e ++ str "-" ++
int (e+6) ++ str ")")
else
(mt ())) ++
report_fn ())
| EvaluatedError (msg,None) ->
msg
| EvaluatedError (msg,Some reraise) ->
msg ++ explain_exn_default_aux anomaly_string report_fn reraise
| reraise ->
hov 0 (anomaly_string () ++ str "Uncaught exception " ++
str (Printexc.to_string reraise) ++ report_fn ())
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 te)
| PretypeError(ctx,te) ->
wrap_vernac_error (Himsg.explain_pretype_error ctx 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)
| 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) ->
EvaluatedError (hov 0 (str "Error: 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")."),
None)
| 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))
| Compat.Exc_located (loc,exc) ->
Compat.Exc_located (loc,process_vernac_interp_error exc)
| exc ->
exc
let anomaly_string () = str "Anomaly: "
let report () = (str "." ++ spc () ++ str "Please report.")
let explain_exn_default =
explain_exn_default_aux anomaly_string report
let raise_if_debug e =
if !Flags.debug then raise e
let _ = Tactic_debug.explain_logic_error :=
(fun e -> explain_exn_default (process_vernac_interp_error e))
let _ = Tactic_debug.explain_logic_error_no_anomaly :=
(fun e ->
explain_exn_default_aux (fun () -> mt()) (fun () -> str ".")
(process_vernac_interp_error e))
let explain_exn_function = ref explain_exn_default
let explain_exn e = !explain_exn_function e
let explain_exn_no_anomaly e =
explain_exn_default_aux (fun () -> raise e) mt e
|
