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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 Util
open Term
open Names
open Pattern
open Globnames
(* 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
open Termdn
module X = struct
type t = constr_pattern*int
let compare = Pervasives.compare (** FIXME *)
end
module Y = struct
type t = term_label
let compare = compare_term_label
end
type 'res lookup_res = 'res Dn.lookup_res = Label of 'res | Nothing | Everything
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 -> Label(GRLabel (IndRef ind_sp),l)
| Construct cstr_sp -> Label(GRLabel (ConstructRef cstr_sp),l)
| Var id -> Label(GRLabel (VarRef id),l)
| Const _ -> Everything
| _ -> 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 Everything else Label(GRLabel (ConstRef c),l)
| Ind ind_sp -> Label(GRLabel (IndRef ind_sp),l)
| Construct cstr_sp -> Label(GRLabel (ConstructRef cstr_sp),l)
| Var id when not (Id.Pred.mem id idpred) -> Label(GRLabel (VarRef id),l)
| Prod (n, d, c) -> Label(ProdLabel, [d; c])
| Lambda (n, d, c) -> Label(LambdaLabel, [d; c] @ l)
| Sort _ -> Label(SortLabel, [])
| Evar _ -> Everything
| _ -> Nothing
let bounded_constr_pat_discr_st st (t,depth) =
if Int.equal depth 0 then
None
else
match 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 Int.equal depth 0 then
Nothing
else
match constr_val_discr_st st t with
| Label (c,l) -> Label(c,List.map (fun c -> (c,depth-1)) l)
| Nothing -> Nothing
| Everything -> Everything
let bounded_constr_pat_discr (t,depth) =
if Int.equal depth 0 then
None
else
match 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 Int.equal depth 0 then
Nothing
else
match constr_val_discr t with
| Label (c,l) -> Label(c,List.map (fun c -> (c,depth-1)) l)
| Nothing -> Nothing
| Everything -> 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
|
