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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Names
open Univ
open Constr
open Mod_subst
type work_list = (Instance.t * Id.t array) Cmap.t *
(Instance.t * Id.t array) Mindmap.t
type cooking_info = {
modlist : work_list;
abstract : Context.Named.t * Univ.universe_level_subst * Univ.AUContext.t }
type proofterm = (constr * Univ.ContextSet.t) Future.computation
type opaque =
| Indirect of substitution list * DirPath.t * int (* subst, lib, index *)
| Direct of cooking_info list * proofterm
type opaquetab = {
opaque_val : (cooking_info list * proofterm) Int.Map.t;
(** Actual proof terms *)
opaque_len : int;
(** Size of the above map *)
opaque_dir : DirPath.t;
}
let empty_opaquetab = {
opaque_val = Int.Map.empty;
opaque_len = 0;
opaque_dir = DirPath.initial;
}
(* hooks *)
let default_get_opaque dp _ =
CErrors.user_err Pp.(pr_sequence str ["Cannot access opaque proofs in library"; DirPath.to_string dp])
let default_get_univ dp _ =
CErrors.user_err (Pp.pr_sequence Pp.str [
"Cannot access universe constraints of opaque proofs in library ";
DirPath.to_string dp])
let get_opaque = ref default_get_opaque
let get_univ = ref default_get_univ
let set_indirect_opaque_accessor f = (get_opaque := f)
let set_indirect_univ_accessor f = (get_univ := f)
(* /hooks *)
let create cu = Direct ([],cu)
let turn_indirect dp o tab = match o with
| Indirect (_,_,i) ->
if not (Int.Map.mem i tab.opaque_val)
then CErrors.anomaly (Pp.str "Indirect in a different table.")
else CErrors.anomaly (Pp.str "Already an indirect opaque.")
| Direct (d,cu) ->
(** Uncomment to check dynamically that all terms turned into
indirections are hashconsed. *)
(* let check_hcons c = let c' = hcons_constr c in assert (c' == c); c in *)
(* let cu = Future.chain ~pure:true cu (fun (c, u) -> check_hcons c; c, u) in *)
let id = tab.opaque_len in
let opaque_val = Int.Map.add id (d,cu) tab.opaque_val in
let opaque_dir =
if DirPath.equal dp tab.opaque_dir then tab.opaque_dir
else if DirPath.equal tab.opaque_dir DirPath.initial then dp
else CErrors.anomaly
(Pp.str "Using the same opaque table for multiple dirpaths.") in
let ntab = { opaque_val; opaque_dir; opaque_len = id + 1 } in
Indirect ([],dp,id), ntab
let subst_opaque sub = function
| Indirect (s,dp,i) -> Indirect (sub::s,dp,i)
| Direct _ -> CErrors.anomaly (Pp.str "Substituting a Direct opaque.")
let iter_direct_opaque f = function
| Indirect _ -> CErrors.anomaly (Pp.str "Not a direct opaque.")
| Direct (d,cu) ->
Direct (d,Future.chain cu (fun (c, u) -> f c; c, u))
let discharge_direct_opaque ~cook_constr ci = function
| Indirect _ -> CErrors.anomaly (Pp.str "Not a direct opaque.")
| Direct (d,cu) ->
Direct (ci::d,Future.chain cu (fun (c, u) -> cook_constr c, u))
let join_opaque { opaque_val = prfs; opaque_dir = odp } = function
| Direct (_,cu) -> ignore(Future.join cu)
| Indirect (_,dp,i) ->
if DirPath.equal dp odp then
let fp = snd (Int.Map.find i prfs) in
ignore(Future.join fp)
let uuid_opaque { opaque_val = prfs; opaque_dir = odp } = function
| Direct (_,cu) -> Some (Future.uuid cu)
| Indirect (_,dp,i) ->
if DirPath.equal dp odp
then Some (Future.uuid (snd (Int.Map.find i prfs)))
else None
let force_proof { opaque_val = prfs; opaque_dir = odp } = function
| Direct (_,cu) ->
fst(Future.force cu)
| Indirect (l,dp,i) ->
let pt =
if DirPath.equal dp odp
then Future.chain (snd (Int.Map.find i prfs)) fst
else !get_opaque dp i in
let c = Future.force pt in
force_constr (List.fold_right subst_substituted l (from_val c))
let force_constraints { opaque_val = prfs; opaque_dir = odp } = function
| Direct (_,cu) -> snd(Future.force cu)
| Indirect (_,dp,i) ->
if DirPath.equal dp odp
then snd (Future.force (snd (Int.Map.find i prfs)))
else match !get_univ dp i with
| None -> Univ.ContextSet.empty
| Some u -> Future.force u
let get_constraints { opaque_val = prfs; opaque_dir = odp } = function
| Direct (_,cu) -> Some(Future.chain cu snd)
| Indirect (_,dp,i) ->
if DirPath.equal dp odp
then Some(Future.chain (snd (Int.Map.find i prfs)) snd)
else !get_univ dp i
let get_proof { opaque_val = prfs; opaque_dir = odp } = function
| Direct (_,cu) -> Future.chain cu fst
| Indirect (l,dp,i) ->
let pt =
if DirPath.equal dp odp
then Future.chain (snd (Int.Map.find i prfs)) fst
else !get_opaque dp i in
Future.chain pt (fun c ->
force_constr (List.fold_right subst_substituted l (from_val c)))
module FMap = Future.UUIDMap
let a_constr = Future.from_val (mkRel 1)
let a_univ = Future.from_val Univ.ContextSet.empty
let a_discharge : cooking_info list = []
let dump { opaque_val = otab; opaque_len = n } =
let opaque_table = Array.make n a_constr in
let univ_table = Array.make n a_univ in
let disch_table = Array.make n a_discharge in
let f2t_map = ref FMap.empty in
Int.Map.iter (fun n (d,cu) ->
let c, u = Future.split2 cu in
Future.sink u;
Future.sink c;
opaque_table.(n) <- c;
univ_table.(n) <- u;
disch_table.(n) <- d;
f2t_map := FMap.add (Future.uuid cu) n !f2t_map)
otab;
opaque_table, univ_table, disch_table, !f2t_map