X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Flambda-delta%2Flib%2Fcps.ml;h=75f8bcd37fa330c9ba8ddf1f2a2ad494a9a9b96b;hb=828a190748fe67669df59d8813d32e17a3bbfd7a;hp=2e8b2c7155715c14d106bad53edd72bb21c11e0a;hpb=8659e85d49be1ad72622d4d3a73d384b744c3c08;p=helm.git

diff --git a/helm/software/lambda-delta/lib/cps.ml b/helm/software/lambda-delta/lib/cps.ml
index 2e8b2c715..75f8bcd37 100644
--- a/helm/software/lambda-delta/lib/cps.ml
+++ b/helm/software/lambda-delta/lib/cps.ml
@@ -9,6 +9,8 @@
      \ /   This software is distributed as is, NO WARRANTY.              
       V_______________________________________________________________ *)
 
+let err () = assert false
+
 let start x = x
 
 let id f x = f x
@@ -30,10 +32,10 @@ let rec list_rev_map_append f map ~tail = function
          let f hd = list_rev_map_append f map ~tail:(hd :: tail) tl in
          map f hd
 
-let rec forall2 f map l1 l2 = match l1, l2 with
+let rec list_forall2 f map l1 l2 = match l1, l2 with
    | [], []                 -> f true
    | hd1 :: tl1, hd2 :: tl2 ->
-      let f b = if b then forall2 f map tl1 tl2 else f false in
+      let f b = if b then list_forall2 f map tl1 tl2 else f false in
       map f hd1 hd2
    | _                      -> f false
 
@@ -46,9 +48,25 @@ let list_rev_map =
 let list_rev =
    list_rev_append ~tail:[]
 
+let list_fold_right f map l a =
+   let map f a m = map f m a in
+   list_rev (list_fold_left f map a) l
+
 let list_map f =
    list_rev_map (list_rev f)
    
 let list_iter f map l =
    let map f () x = map f x in
    list_fold_left f map () l
+
+let rec list_fold_left2 f map a l1 l2 = match l1, l2 with
+   | [], []                 -> f a
+   | hd1 :: tl1, hd2 :: tl2 -> 
+      let f a = list_fold_left2 f map a tl1 tl2 in
+      map f a hd1 hd2
+   | _                      -> assert false
+
+let rec list_mem ?(eq=(=)) a = function
+   | []                   -> false
+   | hd :: _ when eq a hd -> true
+   | _ :: tl              -> list_mem ~eq a tl