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|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
open Names
open Bigint
open Positive_syntax_plugin.Positive_syntax
(* Poor's man DECLARE PLUGIN *)
let __coq_plugin_name = "z_syntax_plugin"
let () = Mltop.add_known_module __coq_plugin_name
(**********************************************************************)
(* Parsing Z via scopes *)
(**********************************************************************)
open Globnames
open Glob_term
let binnums = ["Coq";"Numbers";"BinNums"]
let make_dir l = DirPath.make (List.rev_map Id.of_string l)
let make_path dir id = Libnames.make_path (make_dir dir) (Id.of_string id)
(* TODO: temporary hack *)
let make_kn dir id = Globnames.encode_mind dir id
let z_path = make_path binnums "Z"
let z_kn = make_kn (make_dir binnums) (Id.of_string "Z")
let glob_z = IndRef (z_kn,0)
let path_of_ZERO = ((z_kn,0),1)
let path_of_POS = ((z_kn,0),2)
let path_of_NEG = ((z_kn,0),3)
let glob_ZERO = ConstructRef path_of_ZERO
let glob_POS = ConstructRef path_of_POS
let glob_NEG = ConstructRef path_of_NEG
let z_of_int ?loc n =
if not (Bigint.equal n zero) then
let sgn, n =
if is_pos_or_zero n then glob_POS, n else glob_NEG, Bigint.neg n in
DAst.make ?loc @@ GApp(DAst.make ?loc @@ GRef(sgn,None), [pos_of_bignat ?loc n])
else
DAst.make ?loc @@ GRef(glob_ZERO, None)
(**********************************************************************)
(* Printing Z via scopes *)
(**********************************************************************)
let bigint_of_z z = DAst.with_val (function
| GApp (r, [a]) when is_gr r glob_POS -> bignat_of_pos a
| GApp (r, [a]) when is_gr r glob_NEG -> Bigint.neg (bignat_of_pos a)
| GRef (a, _) when GlobRef.equal a glob_ZERO -> Bigint.zero
| _ -> raise Non_closed_number
) z
let uninterp_z (AnyGlobConstr p) =
try
Some (bigint_of_z p)
with Non_closed_number -> None
(************************************************************************)
(* Declaring interpreters and uninterpreters for Z *)
let _ = Notation.declare_numeral_interpreter "Z_scope"
(z_path,binnums)
z_of_int
([DAst.make @@ GRef (glob_ZERO, None);
DAst.make @@ GRef (glob_POS, None);
DAst.make @@ GRef (glob_NEG, None)],
uninterp_z,
true)
|
