X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Fcic_unification%2FcicRefine.ml;h=fbbb10a6eefecebf6af669bf81e41be57330d8c1;hb=b38de2d3fa8bbe346c59c18bbeb889f29e493f63;hp=b64d8f4bb8b2236793b5be72d911e038e946b227;hpb=f42507bf45ea6b50adbae7ba8117905cc9631101;p=helm.git

diff --git a/helm/ocaml/cic_unification/cicRefine.ml b/helm/ocaml/cic_unification/cicRefine.ml
index b64d8f4bb..fbbb10a6e 100644
--- a/helm/ocaml/cic_unification/cicRefine.ml
+++ b/helm/ocaml/cic_unification/cicRefine.ml
@@ -169,7 +169,7 @@ and type_of_aux' metasenv context t =
     | C.Sort s ->
        C.Sort C.Type, (*CSC manca la gestione degli universi!!! *)
         subst,metasenv
-    | C.Implicit -> raise (Impossible 21)
+    | C.Implicit _ -> raise (Impossible 21)
     | C.Cast (te,ty) ->
        let _,subst',metasenv' =
         type_of_aux subst metasenv context ty in
@@ -419,7 +419,7 @@ and type_of_aux' metasenv context t =
          | Some t,Some (_,C.Def (ct,_)) ->
             (try
               CicUnification.fo_unif_subst subst context metasenv t ct
-             with _ -> raise (NotRefinable (sprintf "The local context is not consistent with the canonical context, since %s cannot be unified with %s" (CicMetaSubst.ppterm subst t) (CicMetaSubst.ppterm subst ct))))
+             with e -> raise (NotRefinable (sprintf "The local context is not consistent with the canonical context, since %s cannot be unified with %s. Reason: %s" (CicMetaSubst.ppterm subst t) (CicMetaSubst.ppterm subst ct) (match e with CicUnification.AssertFailure msg -> msg | _ -> (Printexc.to_string e)))))
          | Some t,Some (_,C.Decl ct) ->
             let inferredty,subst',metasenv' =
              type_of_aux subst metasenv context t
@@ -427,7 +427,7 @@ and type_of_aux' metasenv context t =
              (try
                CicUnification.fo_unif_subst
                 subst' context metasenv' inferredty ct
-             with _ -> raise (NotRefinable (sprintf "The local context is not consistent with the canonical context, since the type %s of %s cannot be unified with the expected type %s" (CicMetaSubst.ppterm subst' inferredty) (CicMetaSubst.ppterm subst' t) (CicMetaSubst.ppterm subst' ct))))
+             with e -> raise (NotRefinable (sprintf "The local context is not consistent with the canonical context, since the type %s of %s cannot be unified with the expected type %s. Reason: %s" (CicMetaSubst.ppterm subst' inferredty) (CicMetaSubst.ppterm subst' t) (CicMetaSubst.ppterm subst' ct) (match e with CicUnification.AssertFailure msg -> msg | _ -> (Printexc.to_string e)))))
          | None, Some _  ->
              raise (NotRefinable (sprintf
               "Not well typed metavariable instance %s: the local context does not instantiate an hypothesis even if the hypothesis is not restricted in the canonical context %s"
@@ -466,8 +466,9 @@ and type_of_aux' metasenv context t =
 
  and sort_of_prod subst metasenv context (name,s) (t1, t2) =
   let module C = Cic in
+    let context_for_t2 = (Some (name,C.Decl s))::context in
     let t1'' = CicMetaSubst.whd subst context t1 in
-    let t2'' = CicMetaSubst.whd subst ((Some (name,C.Decl s))::context) t2 in
+    let t2'' = CicMetaSubst.whd subst context_for_t2 t2 in
     match (t1'', t2'') with
        (C.Sort s1, C.Sort s2)
          when (s2 = C.Prop or s2 = C.Set or s2 = C.CProp) -> (* different than Coq manual!!! *)
@@ -483,9 +484,9 @@ and type_of_aux' metasenv context t =
           * likely to know the exact value of the result e.g. if the rhs is a
           * Sort (Prop | Set | CProp) then the result is the rhs *)
          let (metasenv,idx) =
-          CicMkImplicit.mk_implicit metasenv [] in
+          CicMkImplicit.mk_implicit_sort metasenv in
          let (subst, metasenv) =
-          CicUnification.fo_unif_subst subst context metasenv
+          CicUnification.fo_unif_subst subst context_for_t2 metasenv
            (C.Meta (idx,[])) t2''
          in
           t2'',subst,metasenv
@@ -526,7 +527,7 @@ and type_of_aux' metasenv context t =
        in
        let context'' = Some (name, Cic.Decl argty') :: context' in
        let (metasenv, idx) =
-        CicMkImplicit.mk_implicit metasenv (context'' @ context) in
+        CicMkImplicit.mk_implicit_type metasenv (context'' @ context) in
        let irl =
          (Some (Cic.Rel 1))::args' @
           (CicMkImplicit.identity_relocation_list_for_metavariable ~start:2