2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
12 (* $Id: nCicRefiner.mli 9227 2008-11-21 16:00:06Z tassi $ *)
14 module COT : Set.OrderedType with type t = NCic.term * int * int =
16 type t = NCic.term * int * int
17 let compare = Pervasives.compare
20 module CoercionSet = Set.Make(COT)
23 Discrimination_tree.Make(NDiscriminationTree.NCicIndexable)(CoercionSet)
27 let empty_db = DB.empty,DB.empty
33 method set_coerc_db v = {< db = v >}
36 let index_coercion status c src tgt arity arg =
37 let db_src,db_tgt = status#coerc_db in
38 let data = (c,arity,arg) in
40 prerr_endline ("INDEX:" ^
41 NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] src ^ " ===> " ^
42 NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] tgt ^ " := " ^
43 NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] c);
45 let db_src = DB.index db_src src data in
46 let db_tgt = DB.index db_tgt tgt data in
47 status#set_coerc_db (db_src, db_tgt)
50 let index_old_db odb (status : #status) =
52 (fun status (_,tgt,clist) ->
54 (fun status (uri,_,arg) ->
56 let c=fst (OCic2NCic.convert_term uri (CicUtil.term_of_uri uri)) in
57 let arity = match tgt with | CoercDb.Fun i -> i | _ -> 0 in
59 let cty = NCicTypeChecker.typeof ~subst:[] ~metasenv:[] [] c in
60 let scty, metasenv,_ =
61 NCicMetaSubst.saturate ~delta:max_int [] [] [] cty (arity+1)
64 | NCic.Prod (_, src, tgt) ->
66 NCicSubstitution.subst (NCic.Meta (-1,(0,NCic.Irl 0))) tgt
69 prerr_endline (Printf.sprintf "indicizzo %s (%d) : %s ===> %s"
70 (NCicPp.ppterm ~metasenv ~subst:[] ~context:[] scty) (arity+1)
71 (NCicPp.ppterm ~metasenv ~subst:[] ~context:[] src)
72 (NCicPp.ppterm ~metasenv ~subst:[] ~context:[] tgt));
77 NCicPp.ppterm ~metasenv ~subst:[] ~context:[] t);
80 index_coercion status c src tgt arity arg
82 | NCicEnvironment.BadDependency _
83 | NCicTypeChecker.TypeCheckerFailure _ -> status)
85 status (CoercDb.to_list odb)
88 let look_for_coercion status metasenv subst context infty expty =
89 let db_src,db_tgt = status#coerc_db in
90 match infty, expty with
91 | (NCic.Meta _ | NCic.Appl (NCic.Meta _::_)),
92 (NCic.Meta _ | NCic.Appl (NCic.Meta _::_)) -> []
95 prerr_endline ("LOOK FOR COERCIONS: " ^
96 NCicPp.ppterm ~metasenv ~subst ~context infty ^ " |===> " ^
97 NCicPp.ppterm ~metasenv ~subst ~context expty);
99 let set_src = DB.retrieve_unifiables db_src infty in
100 let set_tgt = DB.retrieve_unifiables db_tgt expty in
101 let candidates = CoercionSet.inter set_src set_tgt in
103 prerr_endline ("CANDIDATES: " ^
104 String.concat "," (List.map (fun (t,_,_) ->
105 NCicPp.ppterm ~metasenv ~subst ~context t)
106 (CoercionSet.elements candidates)));
109 (fun (t,arity,arg) ->
110 let ty = NCicTypeChecker.typeof ~metasenv:[] ~subst:[] [] t in
111 let ty, metasenv, args =
112 NCicMetaSubst.saturate ~delta:max_int metasenv subst context ty arity
115 NCicPp.ppterm ~metasenv ~subst:[] ~context:[] ty ^ " --- " ^
116 NCicPp.ppterm ~metasenv ~subst ~context
117 (NCicUntrusted.mk_appl t args) ^ " --- " ^
118 string_of_int (List.length args) ^ " == " ^ string_of_int arg); *)
119 metasenv, NCicUntrusted.mk_appl t args, ty, List.nth args arg)
120 (CoercionSet.elements candidates)