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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id: btermdn.ml 13332 2010-07-26 22:12:43Z msozeau $ *)
open Term
open Names
open Termdn
open Pattern
open Libnames
(* Discrimination nets with bounded depth.
See the module dn.ml for further explanations.
Eduardo (5/8/97). *)
let dnet_depth = ref 8
module Make =
functor (Z : Map.OrderedType) ->
struct
module Term_dn = Termdn.Make(Z)
module X = struct
type t = constr_pattern*int
let compare = Pervasives.compare
end
module Y = struct
type t = Term_dn.term_label
let compare x y =
let make_name n =
match n with
| Term_dn.GRLabel(ConstRef con) ->
Term_dn.GRLabel(ConstRef(constant_of_kn(canonical_con con)))
| Term_dn.GRLabel(IndRef (kn,i)) ->
Term_dn.GRLabel(IndRef(mind_of_kn(canonical_mind kn),i))
| Term_dn.GRLabel(ConstructRef ((kn,i),j ))->
Term_dn.GRLabel(ConstructRef((mind_of_kn(canonical_mind kn),i),j))
| k -> k
in
Pervasives.compare (make_name x) (make_name y)
end
module Dn = Dn.Make(X)(Y)(Z)
type t = Dn.t
let create = Dn.create
let decomp =
let rec decrec acc c = match kind_of_term c with
| App (f,l) -> decrec (Array.fold_right (fun a l -> a::l) l acc) f
| Cast (c1,_,_) -> decrec acc c1
| _ -> (c,acc)
in
decrec []
let constr_val_discr t =
let c, l = decomp t in
match kind_of_term c with
| Ind ind_sp -> Dn.Label(Term_dn.GRLabel (IndRef ind_sp),l)
| Construct cstr_sp -> Dn.Label(Term_dn.GRLabel (ConstructRef cstr_sp),l)
| Var id -> Dn.Label(Term_dn.GRLabel (VarRef id),l)
| Const _ -> Dn.Everything
| _ -> Dn.Nothing
let constr_val_discr_st (idpred,cpred) t =
let c, l = decomp t in
match kind_of_term c with
| Const c -> if Cpred.mem c cpred then Dn.Everything else Dn.Label(Term_dn.GRLabel (ConstRef c),l)
| Ind ind_sp -> Dn.Label(Term_dn.GRLabel (IndRef ind_sp),l)
| Construct cstr_sp -> Dn.Label(Term_dn.GRLabel (ConstructRef cstr_sp),l)
| Var id when not (Idpred.mem id idpred) -> Dn.Label(Term_dn.GRLabel (VarRef id),l)
| Prod (n, d, c) -> Dn.Label(Term_dn.ProdLabel, [d; c])
| Lambda (n, d, c) -> Dn.Label(Term_dn.LambdaLabel, [d; c] @ l)
| Sort _ -> Dn.Label(Term_dn.SortLabel, [])
| Evar _ -> Dn.Everything
| _ -> Dn.Nothing
let bounded_constr_pat_discr_st st (t,depth) =
if depth = 0 then
None
else
match Term_dn.constr_pat_discr_st st t with
| None -> None
| Some (c,l) -> Some(c,List.map (fun c -> (c,depth-1)) l)
let bounded_constr_val_discr_st st (t,depth) =
if depth = 0 then
Dn.Nothing
else
match constr_val_discr_st st t with
| Dn.Label (c,l) -> Dn.Label(c,List.map (fun c -> (c,depth-1)) l)
| Dn.Nothing -> Dn.Nothing
| Dn.Everything -> Dn.Everything
let bounded_constr_pat_discr (t,depth) =
if depth = 0 then
None
else
match Term_dn.constr_pat_discr t with
| None -> None
| Some (c,l) -> Some(c,List.map (fun c -> (c,depth-1)) l)
let bounded_constr_val_discr (t,depth) =
if depth = 0 then
Dn.Nothing
else
match constr_val_discr t with
| Dn.Label (c,l) -> Dn.Label(c,List.map (fun c -> (c,depth-1)) l)
| Dn.Nothing -> Dn.Nothing
| Dn.Everything -> Dn.Everything
let add = function
| None ->
(fun dn (c,v) ->
Dn.add dn bounded_constr_pat_discr ((c,!dnet_depth),v))
| Some st ->
(fun dn (c,v) ->
Dn.add dn (bounded_constr_pat_discr_st st) ((c,!dnet_depth),v))
let rmv = function
| None ->
(fun dn (c,v) ->
Dn.rmv dn bounded_constr_pat_discr ((c,!dnet_depth),v))
| Some st ->
(fun dn (c,v) ->
Dn.rmv dn (bounded_constr_pat_discr_st st) ((c,!dnet_depth),v))
let lookup = function
| None ->
(fun dn t ->
List.map
(fun ((c,_),v) -> (c,v))
(Dn.lookup dn bounded_constr_val_discr (t,!dnet_depth)))
| Some st ->
(fun dn t ->
List.map
(fun ((c,_),v) -> (c,v))
(Dn.lookup dn (bounded_constr_val_discr_st st) (t,!dnet_depth)))
let app f dn = Dn.app (fun ((c,_),v) -> f(c,v)) dn
end
|
