X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fcic_unification%2FcicRefine.ml;h=f55b1fed0e646de07d387aacfad9aae8bc60d11f;hb=b763e29c46531b2bee8fabd35fa33746f0784d3b;hp=8fa6963aab637b62bcb145dc72eec52d1597b247;hpb=910c252965fe17d6b5af92e4658e7d02bac82d58;p=helm.git

diff --git a/helm/software/components/cic_unification/cicRefine.ml b/helm/software/components/cic_unification/cicRefine.ml
index 8fa6963aa..f55b1fed0 100644
--- a/helm/software/components/cic_unification/cicRefine.ml
+++ b/helm/software/components/cic_unification/cicRefine.ml
@@ -386,7 +386,14 @@ and type_of_aux' ?(clean_dummy_dependent_types=true) ?(localization_tbl = Cic.Ci
                  t,(C.Sort (C.Type tno')),subst,metasenv,ugraph1
               with
                CicUniv.UniverseInconsistency msg -> raise (RefineFailure msg))
-        | C.Sort _ -> 
+        | C.Sort (C.CProp tno) -> 
+            let tno' = CicUniv.fresh() in 
+             (try
+               let ugraph1 = CicUniv.add_gt tno' tno ugraph in
+                 t,(C.Sort (C.Type tno')),subst,metasenv,ugraph1
+              with
+               CicUniv.UniverseInconsistency msg -> raise (RefineFailure msg))
+        | C.Sort (C.Prop|C.Set) -> 
             t,C.Sort (C.Type (CicUniv.fresh())),subst,metasenv,ugraph
         | C.Implicit infos ->
            let metasenv',t' = exp_impl metasenv subst context infos in
@@ -1097,7 +1104,7 @@ and type_of_aux' ?(clean_dummy_dependent_types=true) ?(localization_tbl = Cic.Ci
         | (C.Sort (C.CProp t1), C.Sort (C.Type t2)) -> 
             let t' = CicUniv.fresh() in 
              (try
-              let ugraph1 = CicUniv.add_gt t' t1 ugraph in
+              let ugraph1 = CicUniv.add_ge t' t1 ugraph in
               let ugraph2 = CicUniv.add_ge t' t2 ugraph1 in
                 C.Sort (C.Type t'),subst,metasenv,ugraph2
               with
@@ -1244,9 +1251,11 @@ and type_of_aux' ?(clean_dummy_dependent_types=true) ?(localization_tbl = Cic.Ci
     (* given he:hety, gives beack all (c he) such that (c e):?->? *)
     let fix_arity n metasenv context subst he hetype ugraph =
       let hetype = CicMetaSubst.apply_subst subst hetype in
-      let src = CoercDb.coerc_carr_of_term hetype 0 in 
-      let tgt = CoercDb.coerc_carr_of_term (Cic.Implicit None) 1 in
-      match CoercGraph.look_for_coercion' metasenv subst context src tgt with
+      (* instead of a dummy functional type we may create the real product
+       * using args_bo_and_ty, but since coercions lookup ignores the 
+       * actual ariety we opt for the simple solution *)
+      let fty = Cic.Prod(Cic.Anonymous, Cic.Sort Cic.Prop, Cic.Sort Cic.Prop) in
+      match CoercGraph.look_for_coercion metasenv subst context hetype fty with
       | CoercGraph.NoCoercion -> []
       | CoercGraph.NotHandled ->
          raise (MoreArgsThanExpected (n,Uncertain (lazy "")))
@@ -1299,6 +1308,7 @@ and type_of_aux' ?(clean_dummy_dependent_types=true) ?(localization_tbl = Cic.Ci
                "Fixing arity of: "^ pp he ^ "\n that has type: "^ pp hetype^
                "\n but is applyed to: " ^ String.concat ";" 
                (List.map (fun (t,_)->pp t) args_bo_and_ty)); (*}}}*)
+              let error = ref None in
               let possible_fixes = 
                fix_arity (List.length args) metasenv context subst he hetype
                 ugraph in
@@ -1316,14 +1326,18 @@ and type_of_aux' ?(clean_dummy_dependent_types=true) ?(localization_tbl = Cic.Ci
                    with
                     | RefineFailure _ | Uncertain _
                     | HExtlib.Localized (_,RefineFailure _)
-                    | HExtlib.Localized (_,Uncertain _) -> None)
+                    | HExtlib.Localized (_,Uncertain _) as exn ->
+                       error := Some exn; None)
                 possible_fixes
               with
               | Some x -> x
               | None ->
-                 raise 
-                  (MoreArgsThanExpected
-                    (List.length args, RefineFailure (lazy "")))
+                 match !error with
+                    None ->
+                     raise 
+                      (MoreArgsThanExpected
+                        (List.length args, RefineFailure (lazy "")))
+                  | Some exn -> raise exn
     in
     (* first we check if we are in the simple case of a meta closed term *)
     let subst,metasenv,ugraph1,hetype',he,args_bo_and_ty =