X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Flambda-delta%2Fbasic_rg%2FbrgEnvironment.ml;h=1017092d7afce42c116fd60697813eec3475df26;hb=8049c166a37789d7a1b1ca1c3a1174712bbf87ba;hp=e640c865b4311953c12a59042f889443b3cffb09;hpb=8659e85d49be1ad72622d4d3a73d384b744c3c08;p=helm.git

diff --git a/helm/software/lambda-delta/basic_rg/brgEnvironment.ml b/helm/software/lambda-delta/basic_rg/brgEnvironment.ml
index e640c865b..1017092d7 100644
--- a/helm/software/lambda-delta/basic_rg/brgEnvironment.ml
+++ b/helm/software/lambda-delta/basic_rg/brgEnvironment.ml
@@ -13,21 +13,18 @@ module U = NUri
 module H = U.UriHash
 module B = Brg
 
-exception ObjectNotFound of string Lazy.t
-
 let hsize = 7000 
 let env = H.create hsize
-let entry = ref 0
+let age = ref 1
 
 (* Internal functions *******************************************************)
 
 (* Interface functions ******************************************************)
 
-let set_obj f obj =
-   let _, uri, b = obj in
-   let obj = !entry, uri, b in
-   incr entry; H.add env uri obj; f obj
+let set_entry f entry =
+   let _, uri, b = entry in
+   let entry = !age, uri, b in
+   incr age; H.add env uri entry; f entry
 
-let get_obj f uri =
-   try f (H.find env uri)
-   with Not_found -> raise (ObjectNotFound (lazy (U.string_of_uri uri)))
+let get_entry err f uri =
+   try f (H.find env uri) with Not_found -> err ()