X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Flambda-delta%2Fbasic_rg%2FbrgSubstitution.ml;h=5c9d91a8bdd14009ffb14b0c256ffe2dc480c95b;hb=e17c4da82bd52712f03c112660c52eb8f1783843;hp=4355376e85f26c17011ed29e80a0b15397bb865e;hpb=2e451dca46e509fd7e7772f3d2e438c189ce10a1;p=helm.git

diff --git a/helm/software/lambda-delta/basic_rg/brgSubstitution.ml b/helm/software/lambda-delta/basic_rg/brgSubstitution.ml
index 4355376e8..5c9d91a8b 100644
--- a/helm/software/lambda-delta/basic_rg/brgSubstitution.ml
+++ b/helm/software/lambda-delta/basic_rg/brgSubstitution.ml
@@ -10,19 +10,30 @@
       V_______________________________________________________________ *)
 
 module B = Brg
+(* module O = Output *)
+
+let rec icm a = function
+   | B.Sort _
+   | B.LRef _
+   | B.GRef _                -> succ a
+   | B.Bind (_, B.Void, t)   -> icm (succ a) t
+   | B.Cast (_, u, t)        -> icm (icm a u) t
+   | B.Appl (_, u, t)
+   | B.Bind (_, B.Abst u, t)
+   | B.Bind (_, B.Abbr u, t) -> icm (icm (succ a) u) t
 
 let iter map d =
    let rec iter_bind d = function
-      | B.Void _ as b -> b
-      | B.Abst (a, w) -> B.Abst (a, iter_term d w)
-      | B.Abbr (a, v) -> B.Abbr (a, iter_term d v)
+      | B.Void   -> B.Void
+      | B.Abst w -> B.Abst (iter_term d w)
+      | B.Abbr v -> B.Abbr (iter_term d v)
    and iter_term d = function
       | B.Sort _ as t      -> t
       | B.GRef _ as t      -> t
       | B.LRef (a, i) as t -> if i < d then t else map d a i
       | B.Cast (a, w, v)   -> B.Cast (a, iter_term d w, iter_term d v)
       | B.Appl (a, w, u)   -> B.Appl (a, iter_term d w, iter_term d u)
-      | B.Bind (b, u)      -> B.Bind (iter_bind d b, iter_term (succ d) u)
+      | B.Bind (a, b, u)   -> B.Bind (a, iter_bind d b, iter_term (succ d) u)
    in
    iter_term d
 
@@ -30,9 +41,6 @@ let lift_map h _ a i =
    if i + h >= 0 then B.LRef (a, i + h) else assert false
 
 let lift h d t =
-   if h = 0 then t else iter (lift_map h) d t
-
-let lift_bind h d = function
-   | B.Void _ as b -> b
-   | B.Abst (a, w) -> B.abst a (lift h d w)
-   | B.Abbr (a, v) -> B.abbr a (lift h d v)
+   if h = 0 then t else begin
+(*      O.icm := succ (* icm *) !O.icm (*t*); *) iter (lift_map h) d t
+   end