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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Pp
(** * Managing locality *)
let local_of_bool = function
| true -> Decl_kinds.Local
| false -> Decl_kinds.Global
let check_locality locality_flag =
match locality_flag with
| Some b ->
let s = if b then "Local" else "Global" in
Errors.errorlabstrm "Locality.check_locality"
(str "This command does not support the \"" ++ str s ++ str "\" prefix.")
| None -> ()
(** Extracting the locality flag *)
(* Commands which supported an inlined Local flag *)
let enforce_locality_full locality_flag local =
let local =
match locality_flag with
| Some false when local ->
Errors.error "Cannot be simultaneously Local and Global."
| Some true when local ->
Errors.error "Use only prefix \"Local\"."
| None ->
if local then begin
Pp.msg_warning (Pp.str "Obsolete syntax: use \"Local\" as a prefix.");
Some true
end else
None
| Some b -> Some b in
local
(** Positioning locality for commands supporting discharging and export
outside of modules *)
(* For commands whose default is to discharge and export:
Global is the default and is neutral;
Local in a section deactivates discharge,
Local not in a section deactivates export *)
let make_non_locality = function Some false -> false | _ -> true
let make_locality = function Some true -> true | _ -> false
let enforce_locality locality_flag local =
make_locality (enforce_locality_full locality_flag local)
let enforce_locality_exp locality_flag local =
match locality_flag, local with
| None, Some local -> local
| Some b, None -> local_of_bool b
| None, None -> Decl_kinds.Global
| Some _, Some _ -> Errors.error "Local non allowed in this case"
(* For commands whose default is to not discharge but to export:
Global in sections forces discharge, Global not in section is the default;
Local in sections is the default, Local not in section forces non-export *)
let make_section_locality =
function Some b -> b | None -> Lib.sections_are_opened ()
let enforce_section_locality locality_flag local =
make_section_locality (enforce_locality_full locality_flag local)
(** Positioning locality for commands supporting export but not discharge *)
(* For commands whose default is to export (if not in section):
Global in sections is forbidden, Global not in section is neutral;
Local in sections is the default, Local not in section forces non-export *)
let make_module_locality = function
| Some false ->
if Lib.sections_are_opened () then
Errors.error
"This command does not support the Global option in sections.";
false
| Some true -> true
| None -> false
let enforce_module_locality locality_flag local =
make_module_locality (enforce_locality_full locality_flag local)
module LocalityFixme = struct
let locality = ref None
let set l = locality := l
let consume () =
let l = !locality in
locality := None;
l
let assert_consumed () = check_locality !locality
end
|
