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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* Reserved names *)
open Errors
open Util
open Pp
open Names
open Nameops
open Libobject
open Lib
open Notation_term
open Notation_ops
open Globnames
type key =
| RefKey of global_reference
| Oth
(** TODO: share code from Notation *)
let key_compare k1 k2 = match k1, k2 with
| RefKey gr1, RefKey gr2 -> RefOrdered.compare gr1 gr2
| RefKey _, Oth -> -1
| Oth, RefKey _ -> 1
| Oth, Oth -> 0
module KeyOrd = struct type t = key let compare = key_compare end
module KeyMap = Map.Make(KeyOrd)
module ReservedOrd =
struct
type t = notation_constr * Id.t
let compare = Pervasives.compare (* FIXME *)
end
module ReservedSet = Set.Make(ReservedOrd)
let keymap_add key data map =
let old = try KeyMap.find key map with Not_found -> ReservedSet.empty in
KeyMap.add key (ReservedSet.add data old) map
let reserve_table = Summary.ref Id.Map.empty ~name:"reserved-type"
let reserve_revtable = Summary.ref KeyMap.empty ~name:"reserved-type-rev"
let notation_constr_key = function (* Rem: NApp(NRef ref,[]) stands for @ref *)
| NApp (NRef ref,args) -> RefKey(canonical_gr ref), Some (List.length args)
| NList (_,_,NApp (NRef ref,args),_,_)
| NBinderList (_,_,NApp (NRef ref,args),_) -> RefKey (canonical_gr ref), Some (List.length args)
| NRef ref -> RefKey(canonical_gr ref), None
| _ -> Oth, None
let cache_reserved_type (_,(id,t)) =
let key = fst (notation_constr_key t) in
reserve_table := Id.Map.add id t !reserve_table;
reserve_revtable := keymap_add key (t,id) !reserve_revtable
let in_reserved : Id.t * notation_constr -> obj =
declare_object {(default_object "RESERVED-TYPE") with
cache_function = cache_reserved_type }
let declare_reserved_type_binding (loc,id) t =
if not (Id.equal id (root_of_id id)) then
user_err_loc(loc,"declare_reserved_type",
(pr_id id ++ str
" is not reservable: it must have no trailing digits, quote, or _"));
begin try
let _ = Id.Map.find id !reserve_table in
user_err_loc(loc,"declare_reserved_type",
(pr_id id++str" is already bound to a type"))
with Not_found -> () end;
add_anonymous_leaf (in_reserved (id,t))
let declare_reserved_type idl t =
List.iter (fun id -> declare_reserved_type_binding id t) (List.rev idl)
let find_reserved_type id = Id.Map.find (root_of_id id) !reserve_table
let constr_key c =
try RefKey (canonical_gr (global_of_constr (fst (Term.decompose_app c))))
with Not_found -> Oth
let revert_reserved_type t =
try
let reserved = KeyMap.find (constr_key t) !reserve_revtable in
let t = Detyping.detype false [] [] t in
(* pedrot: if [Notation_ops.match_notation_constr] may raise [Failure _]
then I've introduced a bug... *)
let filter (pat, id) =
try
let _ = match_notation_constr false t ([], pat) in
true
with No_match -> false
in
let reserved = ReservedSet.filter filter reserved in
let (_, id) = ReservedSet.choose reserved in
Name id
with Not_found | Failure _ -> Anonymous
let _ = Namegen.set_reserved_typed_name revert_reserved_type
open Glob_term
let anonymize_if_reserved na t = match na with
| Name id as na ->
(try
if not !Flags.raw_print &&
(try
let ntn = notation_constr_of_glob_constr [] [] t in
Pervasives.(=) ntn (find_reserved_type id) (** FIXME *)
with UserError _ -> false)
then GHole (Loc.ghost,Evar_kinds.BinderType na)
else t
with Not_found -> t)
| Anonymous -> t
|
