X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_refiner%2FnCicUnifHint.ml;h=918ada5991202d0c82cb700a6e6f9a54c143b50d;hb=33fbecf99c187fb4fc84a68ee9f479da046e9df9;hp=c797b2eee6d752ca6a5e868384d0c26ba3465663;hpb=33d0fc706f337453ceb6967dd4fcdc5fe55e65de;p=helm.git

diff --git a/helm/software/components/ng_refiner/nCicUnifHint.ml b/helm/software/components/ng_refiner/nCicUnifHint.ml
index c797b2eee..918ada599 100644
--- a/helm/software/components/ng_refiner/nCicUnifHint.ml
+++ b/helm/software/components/ng_refiner/nCicUnifHint.ml
@@ -51,22 +51,84 @@ let index_hint hdb context t1 t2 =
             NCicSubstitution.subst (NCic.Meta (-1,(0,NCic.Irl 0))) t
         | _ -> assert false) 
      pair' context in
+  prerr_endline ("INDEXING: " ^ 
+    NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] src ^ " |==> " ^
+    NCicPp.ppterm ~metasenv:[] ~subst:[] ~context:[] data);
   DB.index hdb src data
 ;;
 
 let empty_db = DB.empty ;;
 
+let user_db = ref empty_db ;;
+
+let add_user_provided_hint t =
+  let u = UriManager.uri_of_string "cic:/foo/bar.con" in
+  let c, a, b = 
+    let rec aux ctx = function
+      | NCic.Appl l ->
+          (match List.rev l with
+          | b::a::_ -> ctx, a, b
+          | _ -> assert false)
+      | NCic.Prod (n,s,t) ->
+          aux ((n, NCic.Decl s) :: ctx) t
+      | _ -> assert false
+    in
+      aux [] (fst (OCic2NCic.convert_term u t))
+  in
+  user_db := index_hint !user_db c a b 
+;;
+
 let db () = 
-  let _,_,_,x,_,_ = NCicEnvironment.get_checked_def
-    (NReference.reference_of_string "cic:/matita/tests/pullback/xxx.def(0)")
+  let combine f cmp l1 l2 =
+   List.flatten
+     (List.map
+       (fun u1 -> 
+          HExtlib.filter_map 
+            (fun u2 -> if cmp u1 u2 then None else Some (f u1 u2)) l2)
+       l1)
   in
-  let rec decontextualize ctx = function
-    | NCic.Prod (n,s,t) -> decontextualize ((n,NCic.Decl s)::ctx) t
-    | t -> ctx, t
+  let mk_hint (u1,_,_) (u2,_,_) = 
+    let l = OCic2NCic.convert_obj u1 
+      (fst (CicEnvironment.get_obj CicUniv.oblivion_ugraph u1)) in
+    let r = OCic2NCic.convert_obj u2 
+      (fst (CicEnvironment.get_obj CicUniv.oblivion_ugraph u2)) in
+    match List.hd l,List.hd r with
+    | (_,_,_,_,NCic.Constant (_,_,Some l,_,_)), 
+      (_,_,_,_,NCic.Constant (_,_,Some r,_,_)) ->
+        let rec aux ctx t1 t2 =
+          match t1, t2 with
+          | NCic.Lambda (n1,s1,b1), NCic.Lambda(_,s2,b2) ->
+              if NCicReduction.are_convertible ~subst:[] ~metasenv:[] ctx s1 s2
+              then aux ((n1, NCic.Decl s1) :: ctx) b1 b2
+              else None
+          | b1,b2 -> 
+              if NCicReduction.are_convertible ~subst:[] ~metasenv:[] ctx b1 b2 
+              then begin
+(*
+                prerr_endline ("hint: " ^ NCicPp.ppterm ~metasenv:[] ~subst:[]
+                  ~context:ctx b1 ^ " === " ^ NCicPp.ppterm ~metasenv:[]
+                  ~subst:[] ~context:ctx b2);
+*)
+                Some (ctx,b1,b2)
+              end else None
+        in
+          aux [] l r
+    | _ -> None
+  in
+  let hints = 
+    List.fold_left 
+      (fun acc (_,_,l) -> 
+          acc @ 
+          if List.length l > 1 then 
+           combine mk_hint (fun (u1,_,_) (u2,_,_) -> UriManager.eq u1 u2) l l
+          else [])
+      [] (CoercDb.to_list ())
   in
-    match (decontextualize [] x) with
-    | ctx, NCic.Appl [_;_;a;b] -> index_hint empty_db ctx a b
-    | _ -> assert false
+  List.fold_left 
+    (fun db -> function 
+     | None -> db 
+     | Some (ctx,b1,b2) -> index_hint db ctx b1 b2)
+    !user_db hints
 ;;