Ajout option_fold_right

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@4251 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/util.ml b/lib/util.ml
index 46ac2e5ceb..d6e160efd7 100644
--- a/lib/util.ml
+++ b/lib/util.ml
@@ -603,6 +603,10 @@ let option_fold_left2 f e a b = match (a,b) with
   | Some x, Some y -> f e x y
   | _ -> e
 
+let option_fold_right f a e = match a with
+  | Some x -> f x e
+  | _ -> e
+
 let option_compare f a b = match (a,b) with
   | None, None -> true
   | Some a', Some b' -> f a' b'