X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fhelena%2Fsrc%2Fbasic_rg%2FbrgReduction.ml;h=4a9570d50bddd96df063b1952110af714c60aee1;hb=c44a7c4d35c1bb9651c3596519d8262e52e90ff4;hp=e62b90777fe0ebf41bcc442ec67e06d62401c203;hpb=586c361209ac14e8c2b1da3509041c0c82a86c92;p=helm.git

diff --git a/helm/software/helena/src/basic_rg/brgReduction.ml b/helm/software/helena/src/basic_rg/brgReduction.ml
index e62b90777..4a9570d50 100644
--- a/helm/software/helena/src/basic_rg/brgReduction.ml
+++ b/helm/software/helena/src/basic_rg/brgReduction.ml
@@ -10,6 +10,7 @@
       V_______________________________________________________________ *)
 
 module U  = NUri
+module C  = Cps
 module S  = Share
 module L  = Log
 module G  = Options
@@ -44,10 +45,11 @@ let log2 st s cu u ct t =
    let s1, s2, s3 = s ^ " in the environment (expected)", "the term", "and in the environment (inferred)" in
    L.log st BO.specs (pred level) (L.et_items2 s1 cu s2 u ~sc2:s3 ~c2:ct s2 t)
 
-let rec list_and map = function
+let rec list_and f map = function
    | hd1 :: tl1, hd2 :: tl2 ->
-      if map hd1 hd2 then list_and map (tl1, tl2) else false
-   | l1, l2                 -> l1 = l2
+      let f b = f (b && map hd1 hd2) in
+      list_and f map (tl1, tl2)
+   | l1, l2                 -> f (l1 = l2)
 
 let zero = Some 0
 
@@ -258,12 +260,11 @@ and ac st m1 t1 m2 t2 =
 
 and ac_stacks st m1 m2 =
 (*   L.warn "entering R.are_convertible_stacks"; *)
-   if List.length m1.s <> List.length m2.s then false else
    let map (c1, v1) (c2, v2) =
       let m1, m2 = reset m1 ~e:c1 zero, reset m2 ~e:c2 zero in
       ac st m1 v1 m2 v2
    in
-   list_and map (m1.s, m2.s)
+   list_and C.start map (m1.s, m2.s)
 
 let rec ih_nfs st (m, t, r) =
    match t, r with