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Diffstat (limited to '')
| -rw-r--r-- | lib/Utilities.ml | 1 | ||||
| -rw-r--r-- | lib/Utilities.mli | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/lib/Utilities.ml b/lib/Utilities.ml index b7fe364..03d1eea 100644 --- a/lib/Utilities.ml +++ b/lib/Utilities.ml @@ -55,6 +55,7 @@ module List = struct include Generic (ListSequence) + let concat_map f xs = List.map f xs |> sequence |> Stdlib.Result.map List.concat let hd_opt = function x :: _ -> Some x | [] -> None end diff --git a/lib/Utilities.mli b/lib/Utilities.mli index 59bc1fc..fb38966 100644 --- a/lib/Utilities.mli +++ b/lib/Utilities.mli @@ -12,6 +12,7 @@ end module List : sig val sequence : ('a, 'b) result list -> ('a list, 'b) result val fold_left : ('a -> 'b -> ('a, 'e) result) -> 'a -> 'b list -> ('a, 'e) result + val concat_map : ('a -> ('b list, 'e) result) -> 'a list -> ('b list, 'e) result val hd_opt : 'a list -> 'a option end |