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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) *)
(************************************************************************)
(*i*)
open CErrors
open Util
open Pp
open Names
open Cic
open Declarations
(*i*)
let error_not_a_constant l =
user_err Pp.(str ("\""^(Label.to_string l)^"\" is not a constant"))
let error_not_a_functor () = user_err Pp.(str "Application of not a functor")
let error_incompatible_modtypes _ _ = user_err Pp.(str "Incompatible module types")
let error_not_match l _ =
user_err Pp.(str ("Signature components for label "^Label.to_string l^" do not match"))
let error_no_such_label l = user_err Pp.(str ("No such label "^Label.to_string l))
let error_no_such_label_sub l l1 =
let l1 = ModPath.to_string l1 in
user_err Pp.(str ("The field "^
Label.to_string l^" is missing in "^l1^"."))
let error_not_a_module_loc ?loc s =
user_err ?loc (str ("\""^Label.to_string s^"\" is not a module"))
let error_not_a_module s = error_not_a_module_loc s
let error_with_module () =
user_err Pp.(str "Unsupported 'with' constraint in module implementation")
let is_functor = function
| MoreFunctor _ -> true
| NoFunctor _ -> false
let destr_functor = function
| MoreFunctor (arg_id,arg_t,body_t) -> (arg_id,arg_t,body_t)
| NoFunctor _ -> error_not_a_functor ()
let module_body_of_type mp mtb =
{ mtb with mod_mp = mp; mod_expr = Abstract; mod_retroknowledge = ModBodyRK [] }
let rec add_structure mp sign resolver env =
let add_one env (l,elem) =
let kn = KerName.make2 mp l in
let con = Constant.make1 kn in
let mind = mind_of_delta resolver (MutInd.make1 kn) in
match elem with
| SFBconst cb ->
(* let con = constant_of_delta resolver con in*)
Environ.add_constant con cb env
| SFBmind mib ->
(* let mind = mind_of_delta resolver mind in*)
Environ.add_mind mind mib env
| SFBmodule mb -> add_module mb env
(* adds components as well *)
| SFBmodtype mtb -> Environ.add_modtype mtb.mod_mp mtb env
in
List.fold_left add_one env sign
and add_module mb env =
let mp = mb.mod_mp in
let env = Environ.shallow_add_module mp mb env in
match mb.mod_type with
| NoFunctor struc -> add_structure mp struc mb.mod_delta env
| MoreFunctor _ -> env
let add_module_type mp mtb env = add_module (module_body_of_type mp mtb) env
let strengthen_const mp_from l cb resolver =
match cb.const_body with
| Def _ -> cb
| _ ->
let con = Constant.make2 mp_from l in
let u =
match cb.const_universes with
| Monomorphic_const _ -> Univ.Instance.empty
| Polymorphic_const auctx -> Univ.make_abstract_instance auctx
in
{ cb with
const_body = Def (Declarations.from_val (Const (con,u))) }
let rec strengthen_mod mp_from mp_to mb =
if Declarations.mp_in_delta mb.mod_mp mb.mod_delta then mb
else
let mk_expr mp_to = Algebraic (NoFunctor (MEident mp_to)) in
strengthen_body mk_expr mp_from mp_to mb
and strengthen_body : 'a. (_ -> 'a) -> _ -> _ -> 'a generic_module_body -> 'a generic_module_body =
fun mk_expr mp_from mp_to mb ->
match mb.mod_type with
| MoreFunctor _ -> mb
| NoFunctor sign ->
let resolve_out,sign_out = strengthen_sig mp_from sign mp_to mb.mod_delta
in
{ mb with
mod_expr = mk_expr mp_to;
mod_type = NoFunctor sign_out;
mod_delta = resolve_out }
and strengthen_sig mp_from sign mp_to resolver =
match sign with
| [] -> empty_delta_resolver,[]
| (l,SFBconst cb) :: rest ->
let item' = l,SFBconst (strengthen_const mp_from l cb resolver) in
let resolve_out,rest' = strengthen_sig mp_from rest mp_to resolver in
resolve_out,item'::rest'
| (_,SFBmind _ as item):: rest ->
let resolve_out,rest' = strengthen_sig mp_from rest mp_to resolver in
resolve_out,item::rest'
| (l,SFBmodule mb) :: rest ->
let mp_from' = MPdot (mp_from,l) in
let mp_to' = MPdot(mp_to,l) in
let mb_out = strengthen_mod mp_from' mp_to' mb in
let item' = l,SFBmodule (mb_out) in
let resolve_out,rest' = strengthen_sig mp_from rest mp_to resolver in
resolve_out (*add_delta_resolver resolve_out mb.mod_delta*),
item':: rest'
| (l,SFBmodtype mty as item) :: rest ->
let resolve_out,rest' = strengthen_sig mp_from rest mp_to resolver in
resolve_out,item::rest'
let strengthen mtb mp =
strengthen_body ignore mtb.mod_mp mp mtb
let subst_and_strengthen mb mp =
strengthen_mod mb.mod_mp mp (subst_module (map_mp mb.mod_mp mp) mb)
let module_type_of_module mp mb =
let mtb =
{ mb with
mod_expr = ();
mod_type_alg = None;
mod_retroknowledge = ModTypeRK }
in
match mp with
| Some mp -> strengthen {mtb with mod_mp = mp} mp
| None -> mtb
|
