add function

src/core/CCResult.ml

@@ -167,6 +167,11 @@ let is_error = function
   | Ok _ -> false
   | Error _ -> true
 
+let split_ok_error results =
+  results
+  |> CCList.partition_filter_map (fun x ->
+         match x with Ok o -> `Left o | Error e -> `Right e)
+
 (** {2 Wrappers} *)
 
 let guard f = try Ok (f ()) with e -> Error e

src/core/CCResult.mli

@@ -145,6 +145,10 @@ val is_error : ('a, 'err) t -> bool
 (** Return true if [Error].
     @since 1.0 *)
 
+val split_ok_error : ('ok, 'error) result list -> 'ok list * 'error list
+(** Split a list of results into [Ok]s and [Error]s.
+    @since 3.14.1 *)
+
 (** {2 Wrappers} *)
 
 val guard : (unit -> 'a) -> ('a, exn) t