X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_kernel%2FnCicEnvironment.ml;h=2d5f03945f8d1fa69ae85444c2fdf58fbb842a57;hb=bbbf8a74bd5a272673c8687fdf2fc5eb9867853b;hp=0ddd3601db02f4502f0cc0d9780adaff6b74584a;hpb=1ee5193677b8e2a80d4f068ee79ecac335de1196;p=helm.git

diff --git a/helm/software/components/ng_kernel/nCicEnvironment.ml b/helm/software/components/ng_kernel/nCicEnvironment.ml
index 0ddd3601d..2d5f03945 100644
--- a/helm/software/components/ng_kernel/nCicEnvironment.ml
+++ b/helm/software/components/ng_kernel/nCicEnvironment.ml
@@ -16,11 +16,20 @@ module Ref = NReference
 
 exception CircularDependency of string Lazy.t;;
 exception ObjectNotFound of string Lazy.t;;
-exception BadDependency of string Lazy.t;;
+exception BadDependency of string Lazy.t * exn;;
 exception BadConstraint of string Lazy.t;;
 
+let get_obj = ref (fun _ -> assert false);;
+let set_get_obj f = get_obj := f;;
+
 let type0 = []
 
+let max l1 l2 =
+ HExtlib.list_uniq ~eq:(fun (b1,u1) (b2,u2) -> b1=b2 && NUri.eq u1 u2)
+  (List.sort (fun (b1,u1) (b2,u2) ->
+    let res = compare b1 b2 in if res = 0 then NUri.compare u1 u2 else res)
+      (l1 @ l2))
+
 let le_constraints = ref [] (* strict,a,b *)
 
 let rec le_path_uri avoid strict a b =
@@ -41,7 +50,15 @@ let universe_leq a b =
      raise (BadConstraint
       (lazy "trying to check if a universe is less or equal than an inferred universe"))
 
-let universe_eq a b = universe_leq b a && universe_leq a b
+let universe_eq a b = 
+  match a,b with 
+  | [(false,_)], [(false,_)] -> universe_leq b a && universe_leq a b
+  | _, [(false,_)]
+  | [(false,_)],_ -> false
+  | _ ->
+     raise (BadConstraint
+      (lazy "trying to check if two inferred universes are equal"))
+;;
 
 let pp_constraint b x y =  
   NUri.name_of_uri x ^ (if b then " < " else " <= ") ^ NUri.name_of_uri y
@@ -96,60 +113,79 @@ let set_typecheck_obj f =
 ;;
 
 let cache = NUri.UriHash.create 313;;
+let history = ref [];;
 let frozen_list = ref [];;
 
+let invalidate_obj uri =
+ let rec aux to_be_deleted =
+  function
+     [] -> assert false
+   | uri'::tl when NUri.eq uri uri' -> uri'::to_be_deleted,tl
+   | uri'::tl -> aux (uri'::to_be_deleted) tl
+ in
+  let to_be_deleted,h = aux [] !history in
+   history := h;
+   List.iter (fun uri -> NUri.UriHash.remove cache uri) to_be_deleted
+;;
+
 exception Propagate of NUri.uri * exn;;
 
+let to_exn f x =
+ match f x with
+    `WellTyped o -> o
+  | `Exn e -> raise e
+;;
+
+let check_and_add_obj ((u,_,_,_,_) as obj) =
+ let saved_frozen_list = !frozen_list in
+ try
+   frozen_list := (u,obj)::saved_frozen_list;
+   !typecheck_obj obj;
+   frozen_list := saved_frozen_list;
+   let obj = `WellTyped obj in
+   NUri.UriHash.add cache u obj;
+   history := u::!history;
+   obj
+ with
+    Sys.Break as e ->
+     frozen_list := saved_frozen_list;
+     raise e
+  | Propagate (u',old_exn) as e' ->
+     frozen_list := saved_frozen_list;
+     let exn = `Exn (BadDependency (lazy (NUri.string_of_uri u ^
+       " depends (recursively) on " ^ NUri.string_of_uri u' ^
+       " which is not well-typed"), 
+       match old_exn with BadDependency (_,e) -> e | _ -> old_exn)) in
+     NUri.UriHash.add cache u exn;
+     history := u::!history;
+     if saved_frozen_list = [] then
+      exn
+     else
+      raise e'
+  | e ->
+     frozen_list := saved_frozen_list;
+     let exn = `Exn e in
+     NUri.UriHash.add cache u exn;
+     history := u::!history;
+     if saved_frozen_list = [] then
+      exn
+     else
+      raise (Propagate (u,e))
+;;
+
 let get_checked_obj u =
  if List.exists (fun (k,_) -> NUri.eq u k) !frozen_list
  then
   raise (CircularDependency (lazy (NUri.string_of_uri u)))
  else
-  let obj =
-   try NUri.UriHash.find cache u
-   with
-    Not_found ->
-     let saved_frozen_list = !frozen_list in
-     try
-      let obj =
-       try NCicLibrary.get_obj u
-       with
-        NCicLibrary.ObjectNotFound m -> raise (ObjectNotFound m)
-      in
-        frozen_list := (u,obj)::saved_frozen_list;
-        !typecheck_obj obj;
-        frozen_list := saved_frozen_list;
-        let obj = `WellTyped obj in
-        NUri.UriHash.add cache u obj;
-        obj
-     with
-        Sys.Break as e ->
-         frozen_list := saved_frozen_list;
-         raise e
-      | Propagate (u',_) as e' ->
-         frozen_list := saved_frozen_list;
-         let exn = `Exn (BadDependency (lazy (NUri.string_of_uri u ^
-           " depends (recursively) on " ^ NUri.string_of_uri u' ^
-           " which is not well-typed"))) in
-         NUri.UriHash.add cache u exn;
-         if saved_frozen_list = [] then
-          exn
-         else
-          raise e'
-      | e ->
-         frozen_list := saved_frozen_list;
-         let exn = `Exn e in
-         NUri.UriHash.add cache u exn;
-         if saved_frozen_list = [] then
-          exn
-         else
-          raise (Propagate (u,e))
-  in
-   match obj with
-      `WellTyped o -> o
-    | `Exn e -> raise e
+  try NUri.UriHash.find cache u
+  with Not_found -> check_and_add_obj (!get_obj u)
 ;;
 
+let get_checked_obj u = to_exn get_checked_obj u;;
+
+let check_and_add_obj obj = ignore (to_exn check_and_add_obj obj);;
+
 let get_checked_decl = function
   | Ref.Ref (uri, Ref.Decl) ->
       (match get_checked_obj uri with