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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Util
open Pp
open CErrors
type deprecation = bool
type atts = {
loc : Loc.t option;
locality : bool option;
polymorphic : bool;
}
type 'a vernac_command = 'a -> atts:atts -> st:Vernacstate.t -> Vernacstate.t
type plugin_args = Genarg.raw_generic_argument list
(* Table of vernac entries *)
let vernac_tab =
(Hashtbl.create 211 :
(Vernacexpr.extend_name, deprecation * plugin_args vernac_command) Hashtbl.t)
let vinterp_add depr s f =
try
Hashtbl.add vernac_tab s (depr, f)
with Failure _ ->
user_err ~hdr:"vinterp_add"
(str"Cannot add the vernac command " ++ str (fst s) ++ str" twice.")
let overwriting_vinterp_add s f =
begin
try
let _ = Hashtbl.find vernac_tab s in Hashtbl.remove vernac_tab s
with Not_found -> ()
end;
Hashtbl.add vernac_tab s (false, f)
let vinterp_map s =
try
Hashtbl.find vernac_tab s
with Failure _ | Not_found ->
user_err ~hdr:"Vernac Interpreter"
(str"Cannot find vernac command " ++ str (fst s) ++ str".")
let vinterp_init () = Hashtbl.clear vernac_tab
let warn_deprecated_command =
let open CWarnings in
create ~name:"deprecated-command" ~category:"deprecated"
(fun pr -> str "Deprecated vernacular command: " ++ pr)
(* Interpretation of a vernac command *)
let call opn converted_args ~atts ~st =
let phase = ref "Looking up command" in
try
let depr, callback = vinterp_map opn in
let () = if depr then
let rules = Egramml.get_extend_vernac_rule opn in
let pr_gram = function
| Egramml.GramTerminal s -> str s
| Egramml.GramNonTerminal _ -> str "_"
in
let pr = pr_sequence pr_gram rules in
warn_deprecated_command pr;
in
phase := "Checking arguments";
let hunk = callback converted_args in
phase := "Executing command";
hunk ~atts ~st
with
| Drop -> raise Drop
| reraise ->
let reraise = CErrors.push reraise in
if !Flags.debug then
Feedback.msg_debug (str"Vernac Interpreter " ++ str !phase);
iraise reraise
|
