diff options
Diffstat (limited to 'lib/cList.ml')
-rw-r--r-- | lib/cList.ml | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/cList.ml b/lib/cList.ml index bd3e09b5b..ba592d13f 100644 --- a/lib/cList.ml +++ b/lib/cList.ml @@ -48,6 +48,7 @@ sig val filteri : (int -> 'a -> bool) -> 'a list -> 'a list val smartfilter : ('a -> bool) -> 'a list -> 'a list + val extend : bool list -> 'a -> 'a list -> 'a list val count : ('a -> bool) -> 'a list -> int val index : 'a eq -> 'a -> 'a list -> int val index0 : 'a eq -> 'a -> 'a list -> int @@ -376,6 +377,12 @@ let rec smartfilter f l = match l with else h :: tl' else tl' +let rec extend l a l' = match l,l' with + | true::l, b::l' -> b :: extend l a l' + | false::l, l' -> a :: extend l a l' + | [], [] -> [] + | _ -> invalid_arg "extend" + let count f l = let rec aux acc = function | [] -> acc |