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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 *)
(************************************************************************)
open Errors
open Names
open Term
open Mod_subst
open Libnames
(*s Global reference is a kernel side type for all references together *)
type global_reference =
| VarRef of variable
| ConstRef of constant
| IndRef of inductive
| ConstructRef of constructor
let isVarRef = function VarRef _ -> true | _ -> false
let isConstRef = function ConstRef _ -> true | _ -> false
let isIndRef = function IndRef _ -> true | _ -> false
let isConstructRef = function ConstructRef _ -> true | _ -> false
let eq_gr gr1 gr2 =
match gr1,gr2 with
| ConstRef con1, ConstRef con2 -> eq_constant con1 con2
| IndRef kn1, IndRef kn2 -> eq_ind kn1 kn2
| ConstructRef kn1, ConstructRef kn2 -> eq_constructor kn1 kn2
| VarRef v1, VarRef v2 -> Id.equal v1 v2
| _ -> false
let destVarRef = function VarRef ind -> ind | _ -> failwith "destVarRef"
let destConstRef = function ConstRef ind -> ind | _ -> failwith "destConstRef"
let destIndRef = function IndRef ind -> ind | _ -> failwith "destIndRef"
let destConstructRef = function ConstructRef ind -> ind | _ -> failwith "destConstructRef"
let subst_constructor subst ((kn,i),j as ref) =
let kn' = subst_ind subst kn in
if kn==kn' then ref, mkConstruct ref
else ((kn',i),j), mkConstruct ((kn',i),j)
let subst_global subst ref = match ref with
| VarRef var -> ref, mkVar var
| ConstRef kn ->
let kn',t = subst_con subst kn in
if kn==kn' then ref, mkConst kn else ConstRef kn', t
| IndRef (kn,i) ->
let kn' = subst_ind subst kn in
if kn==kn' then ref, mkInd (kn,i) else IndRef(kn',i), mkInd (kn',i)
| ConstructRef ((kn,i),j as c) ->
let c',t = subst_constructor subst c in
if c'==c then ref,t else ConstructRef c', t
let canonical_gr = function
| ConstRef con -> ConstRef(constant_of_kn(canonical_con con))
| IndRef (kn,i) -> IndRef(mind_of_kn(canonical_mind kn),i)
| ConstructRef ((kn,i),j )-> ConstructRef((mind_of_kn(canonical_mind kn),i),j)
| VarRef id -> VarRef id
let global_of_constr c = match kind_of_term c with
| Const sp -> ConstRef sp
| Ind ind_sp -> IndRef ind_sp
| Construct cstr_cp -> ConstructRef cstr_cp
| Var id -> VarRef id
| _ -> raise Not_found
let constr_of_global = function
| VarRef id -> mkVar id
| ConstRef sp -> mkConst sp
| ConstructRef sp -> mkConstruct sp
| IndRef sp -> mkInd sp
let constr_of_reference = constr_of_global
let reference_of_constr = global_of_constr
let global_ord_gen ord_cst ord_ind ord_cons x y = match x, y with
| ConstRef cx, ConstRef cy -> ord_cst cx cy
| IndRef indx, IndRef indy -> ord_ind indx indy
| ConstructRef consx, ConstructRef consy -> ord_cons consx consy
| VarRef v1, VarRef v2 -> Id.compare v1 v2
| _, _ -> Pervasives.compare x y
let global_ord_can =
global_ord_gen con_ord ind_ord constructor_ord
let global_ord_user =
global_ord_gen con_user_ord ind_user_ord constructor_user_ord
(* By default, [global_reference] are ordered on their canonical part *)
module RefOrdered = struct
type t = global_reference
let compare = global_ord_can
end
module RefOrdered_env = struct
type t = global_reference
let compare = global_ord_user
end
module Refset = Set.Make(RefOrdered)
module Refmap = Map.Make(RefOrdered)
(* Extended global references *)
type syndef_name = kernel_name
type extended_global_reference =
| TrueGlobal of global_reference
| SynDef of syndef_name
(* We order [extended_global_reference] via their user part
(cf. pretty printer) *)
module ExtRefOrdered = struct
type t = extended_global_reference
let compare x y =
match x, y with
| TrueGlobal rx, TrueGlobal ry -> global_ord_user rx ry
| SynDef knx, SynDef kny -> kn_ord knx kny
| _, _ -> Pervasives.compare x y
end
type global_reference_or_constr =
| IsGlobal of global_reference
| IsConstr of constr
let constr_of_global_or_constr = function
| IsConstr c -> c
| IsGlobal gr -> constr_of_global gr
(** {6 Temporary function to brutally form kernel names from section paths } *)
let encode_mind dir id = make_mind (MPfile dir) Dir_path.empty (Label.of_id id)
let encode_con dir id = make_con (MPfile dir) Dir_path.empty (Label.of_id id)
let check_empty_section dp =
if not (Dir_path.is_empty dp) then
anomaly (Pp.str "Section part should be empty!")
let decode_mind kn =
let rec dir_of_mp = function
| MPfile dir -> Dir_path.repr dir
| MPbound mbid ->
let _,_,dp = MBId.repr mbid in
let id = MBId.to_id mbid in
id::(Dir_path.repr dp)
| MPdot(mp,l) -> (Label.to_id l)::(dir_of_mp mp)
in
let mp,sec_dir,l = repr_mind kn in
check_empty_section sec_dir;
(Dir_path.make (dir_of_mp mp)),Label.to_id l
let decode_con kn =
let mp,sec_dir,l = repr_con kn in
check_empty_section sec_dir;
match mp with
| MPfile dir -> (dir,Label.to_id l)
| _ -> anomaly (Pp.str "MPfile expected!")
(** Popping one level of section in global names.
These functions are meant to be used during discharge:
user and canonical kernel names must be equal. *)
let pop_con con =
let (mp,dir,l) = repr_con con in
Names.make_con mp (pop_dirpath dir) l
let pop_kn kn =
let (mp,dir,l) = repr_mind kn in
Names.make_mind mp (pop_dirpath dir) l
let pop_global_reference = function
| ConstRef con -> ConstRef (pop_con con)
| IndRef (kn,i) -> IndRef (pop_kn kn,i)
| ConstructRef ((kn,i),j) -> ConstructRef ((pop_kn kn,i),j)
| VarRef id -> anomaly (Pp.str "VarRef not poppable")
|
