X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fcic%2FcicUtil.ml;h=36f65391eeac23d27c565b65d8e09ea52cd22f0c;hb=b378b7f4f2a3a897c4b69f44d4d1d54cc4d0aa56;hp=c5061c62fd1f7a7ac6db4e0bbd66258ad74e3a86;hpb=987627a48b2a3c2345d1af2c2a6b1ab78aa90b58;p=helm.git

diff --git a/helm/software/components/cic/cicUtil.ml b/helm/software/components/cic/cicUtil.ml
index c5061c62f..36f65391e 100644
--- a/helm/software/components/cic/cicUtil.ml
+++ b/helm/software/components/cic/cicUtil.ml
@@ -216,16 +216,6 @@ let attributes_of_obj = function
 
 let is_generated obj = List.exists ((=) `Generated) (attributes_of_obj obj)
 
-let arity_of_composed_coercion obj =
-  let attrs = attributes_of_obj obj in
-  try
-    let tag=List.find (function `Class (`Coercion _) -> true|_->false) attrs in
-    match tag with
-    |  `Class (`Coercion n) -> n
-    | _-> assert false 
-  with Not_found -> 0
-;;
-
 let projections_of_record obj uri =
   let attrs = attributes_of_obj obj in
   try
@@ -560,7 +550,8 @@ let alpha_equivalence =
 
 let is_sober c t =
    let rec sober_term c g = function
-      | C.Rel _ 
+      | C.Rel i                         ->
+         if i <= 0 then fun b -> false else g
       | C.Sort _  
       | C.Implicit _                    -> g      
       | C.Const (_, xnss) 
@@ -575,7 +566,8 @@ let is_sober c t =
       | C.LetIn (_, v, ty, t)           ->
          sober_term c (sober_term c (sober_term c g t) ty) v
       | C.Appl []                       
-      | C.Appl [_]                      -> fun b -> false
+      | C.Appl [_]                      
+      | C.Appl (C.Appl _ :: _)          -> fun b -> false
       | C.Appl ts                       -> sober_terms c g ts
       | C.MutCase (_, _, t, v, ts)      -> 
          sober_terms c (sober_term c (sober_term c g t) v) ts