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-rw-r--r--lib/util.mli2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/util.mli b/lib/util.mli
index f330ef8e00..1a2fedbdfc 100644
--- a/lib/util.mli
+++ b/lib/util.mli
@@ -100,6 +100,8 @@ val list_map2_i :
val list_map3 :
('a -> 'b -> 'c -> 'd) -> 'a list -> 'b list -> 'c list -> 'd list
val list_index : 'a -> 'a list -> int
+(* [list_unique_index x l] returns [Not_found] if [x] doesn't occur exactly once *)
+val list_unique_index : 'a -> 'a list -> int
val list_iter_i : (int -> 'a -> unit) -> 'a list -> unit
val list_fold_left_i : (int -> 'a -> 'b -> 'a) -> int -> 'a -> 'b list -> 'a
val list_fold_right_and_left :