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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* $Id: btermdn.ml 11282 2008-07-28 11:51:53Z 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
let bounded_constr_pat_discr_st st (t,depth) =
if 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 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 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
type 'a t = (global_reference,constr_pattern * int,'a) Dn.t
let create = Dn.create
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
|
