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(***********************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA-Rocquencourt & LRI-CNRS-Orsay *)
(* \VV/ *************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(***********************************************************************)
open Pp
(* spiwack: it might be reasonable to decide and move the declarations
of Anomaly and so on to this module so as not to depend on Util. *)
(* spiwack: This module contains stuff exfiltrated from Cerrors. *)
let handle_stack = ref []
exception Unhandled
let register_handler h = handle_stack := h::!handle_stack
(* spiwack: [anomaly_string] and [report_fn] are copies from Cerrors.
Ultimately they should disapear from Cerrors. *)
let anomaly_string () = str "Anomaly: "
let report_fn () = (str "." ++ spc () ++ str "Please report.")
(* [print_unhandled_exception] is the virtual bottom of the stack:
the [handle_stack] is treated as it if was always non-empty
with [print_unhandled_exception] as its last handler. *)
let print_unhandled_exception e =
hov 0 (anomaly_string () ++ str "Uncaught exception " ++
str (Printexc.to_string e) ++ report_fn ())
let rec print_gen s e =
match s with
| [] -> print_unhandled_exception e
| h::s' ->
try h e
with
| Unhandled -> print_gen s' e
| e' -> print_gen s' e'
let print e = print_gen !handle_stack e
(*** Predefined handlers ***)
let where s =
if !Flags.debug then (str"in " ++ str s ++ str":" ++ spc ()) else (mt ())
let _ = register_handler begin function
| Util.UserError(s,pps) ->
hov 0 (str "Error: " ++ where s ++ pps)
| Util.Anomaly (s,pps) ->
hov 0 (anomaly_string () ++ where s ++ pps ++ report_fn ())
| _ -> raise Unhandled
end
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