X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fextlib%2FhExtlib.ml;h=8451eb6b86c69eb435adf561a7290497cc353ff3;hb=8bc5bc0e8375a85736f6a5df317d129d5efa8de4;hp=5f2c7f78caab9eef51dc733ebe59d4addfee1194;hpb=d3548c16f481b14ce94e64c790bc767c59590050;p=helm.git

diff --git a/helm/software/components/extlib/hExtlib.ml b/helm/software/components/extlib/hExtlib.ml
index 5f2c7f78c..8451eb6b8 100644
--- a/helm/software/components/extlib/hExtlib.ml
+++ b/helm/software/components/extlib/hExtlib.ml
@@ -217,6 +217,18 @@ let rec filter_map f =
       | None -> filter_map f tl
       | Some v -> v :: filter_map f tl)
 
+let filter_map_acc f acc l =
+  let acc, res = 
+   List.fold_left
+    (fun (acc, res) t ->
+       match f acc t with
+       | None -> acc, res
+       | Some (acc, x) -> acc, x::res)
+    (acc,[]) l
+  in
+   acc, List.rev res
+;;
+
 let list_rev_map_filter f l =
    let rec aux a = function
       | []       -> a
@@ -248,6 +260,15 @@ let list_concat ?(sep = []) =
   in
   aux []
   
+let list_iter_sep ~sep f =
+  let rec aux =
+    function
+    | [] -> ()
+    | [ last ] -> f last
+    | hd :: tl -> f hd; sep (); aux tl
+  in
+  aux
+  
 let rec list_findopt f l = 
   let rec aux k = function 
     | [] -> None