2 files changed, 3 insertions, 0 deletions
diff --git a/lib/util.ml b/lib/util.ml
index b8ceea3ea0..8512e10e1c 100644
--- a/lib/util.ml
+++ b/lib/util.ml
@@ -1126,6 +1126,8 @@ let identity x = x
 
 let compose f g x = f (g x)
 
+let const x _ = x
+
 let iterate f =
   let rec iterate_f n x =
     if n <= 0 then x else iterate_f (pred n) (f x)
diff --git a/lib/util.mli b/lib/util.mli
index 7784635c3c..ddf32e7623 100644
--- a/lib/util.mli
+++ b/lib/util.mli
@@ -262,6 +262,7 @@ val matrix_transpose : 'a list list -> 'a list list
 
 val identity : 'a -> 'a
 val compose : ('a -> 'b) -> ('c -> 'a) -> 'c -> 'b
+val const : 'a -> 'b -> 'a
 val iterate : ('a -> 'a) -> int -> 'a -> 'a
 val repeat : int -> ('a -> unit) -> 'a -> unit
 val iterate_for : int -> int -> (int -> 'a -> 'a) -> 'a -> 'a