1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
(************************************************************************)
(* 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: termdn.ml 11282 2008-07-28 11:51:53Z msozeau $ *)
open Util
open Names
open Nameops
open Term
open Pattern
open Rawterm
open Libnames
open Nametab
(* Discrimination nets of terms.
See the module dn.ml for further explanations.
Eduardo (5/8/97) *)
type 'a t = (global_reference,constr_pattern,'a) Dn.t
(*If we have: f a b c ..., decomp gives: (f,[a;b;c;...])*)
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 decomp_pat =
let rec decrec acc = function
| PApp (f,args) -> decrec (Array.to_list args @ acc) f
| c -> (c,acc)
in
decrec []
let constr_pat_discr t =
if not (occur_meta_pattern t) then
None
else
match decomp_pat t with
| PRef ((IndRef _) as ref), args
| PRef ((ConstructRef _ ) as ref), args -> Some (ref,args)
| PRef ((VarRef v) as ref), args -> Some(ref,args)
| _ -> None
let constr_pat_discr_st (idpred,cpred) t =
match decomp_pat t with
| PRef ((IndRef _) as ref), args
| PRef ((ConstructRef _ ) as ref), args -> Some (ref,args)
| PRef ((VarRef v) as ref), args when not (Idpred.mem v idpred) ->
Some(ref,args)
| PVar v, args when not (Idpred.mem v idpred) ->
Some(VarRef v,args)
| PRef ((ConstRef c) as ref), args when not (Cpred.mem c cpred) ->
Some (ref, args)
| _ -> None
open Dn
let constr_val_discr t =
let c, l = decomp t in
match kind_of_term c with
| Ind ind_sp -> Label(IndRef ind_sp,l)
| Construct cstr_sp -> Label((ConstructRef cstr_sp),l)
| Var id -> Label(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(ConstRef c,l)
| Ind ind_sp -> Label(IndRef ind_sp,l)
| Construct cstr_sp -> Label((ConstructRef cstr_sp),l)
| Var id when not (Idpred.mem id idpred) -> Label(VarRef id,l)
| Evar _ -> Everything
| _ -> Nothing
let create = Dn.create
let add dn st = Dn.add dn (constr_pat_discr_st st)
let rmv dn st = Dn.rmv dn (constr_pat_discr_st st)
let lookup dn st t = Dn.lookup dn (constr_val_discr_st st) t
let app f dn = Dn.app f dn
|
