c6b95bf07a
- do not use plain JSON rep for errors and use polymorphic variants instead - split formatting for human readable and JSON output - no more simple_errors simple_fails - much less result bindings used in stages
100 lines
2.0 KiB
OCaml
100 lines
2.0 KiB
OCaml
(* Constructors *)
|
|
let none = None
|
|
let some x = Some x
|
|
let return = some
|
|
|
|
(* Destructors *)
|
|
let unopt ~default x = match x with
|
|
| None -> default
|
|
| Some x -> x
|
|
let unopt_exn x = match x with
|
|
| None -> raise Not_found
|
|
| Some x -> x
|
|
|
|
(* Base Tranformers *)
|
|
let bind f = function
|
|
| None -> None
|
|
| Some x -> f x
|
|
let map f x =
|
|
let f' y = return @@ f y in
|
|
bind f' x
|
|
|
|
(* Syntax *)
|
|
let (>>=) x f = bind f x
|
|
|
|
(* Interaction with List *)
|
|
let to_list = function
|
|
| None -> []
|
|
| Some x -> [ x ]
|
|
let collapse_list = fun l ->
|
|
List.concat @@ List.map to_list l
|
|
|
|
(* Combinators *)
|
|
let bind_eager_or = fun a b -> match (a , b) with
|
|
| Some a , _ -> Some a
|
|
| _ , Some b -> Some b
|
|
| _ -> None
|
|
|
|
let map_pair_or = fun (fa, fb) p ->
|
|
bind_eager_or (fa p) (fb p)
|
|
|
|
let bind_union (a , b) = match (a , b) with
|
|
| Some x , _ -> Some (`Left x)
|
|
| None , Some x -> Some (`Right x)
|
|
| _ -> None
|
|
|
|
let rec bind_list = fun lst ->
|
|
(* TODO: recursive terminal *)
|
|
match lst with
|
|
| [] -> Some []
|
|
| hd :: tl -> (
|
|
match hd with
|
|
| None -> None
|
|
| Some hd' -> (
|
|
match bind_list tl with
|
|
| None -> None
|
|
| Some tl' -> Some (hd' :: tl')
|
|
)
|
|
)
|
|
|
|
let bind_pair = fun (a , b) ->
|
|
a >>= fun a' ->
|
|
b >>= fun b' ->
|
|
Some (a' , b')
|
|
|
|
let bind_map_list = fun f lst -> bind_list (X_list.map f lst)
|
|
|
|
let bind_map_pair = fun f (a , b) -> bind_pair (f a , f b)
|
|
|
|
let bind_smap (s:_ X_map.String.t) =
|
|
let open X_map.String in
|
|
let aux k v prev =
|
|
prev >>= fun prev' ->
|
|
v >>= fun v' ->
|
|
Some (add k v' prev') in
|
|
fold aux s (Some empty)
|
|
|
|
let bind_map_smap f smap = bind_smap (X_map.String.map f smap)
|
|
|
|
let equal eq x y =
|
|
match (x, y) with
|
|
| (None, None) -> true
|
|
| (Some x, Some y) -> eq x y
|
|
| _ -> false
|
|
|
|
let compare compare x y =
|
|
match (x, y) with
|
|
| (None, None) -> 0
|
|
| (None, Some _) -> -1
|
|
| (Some _, None) -> 1
|
|
| (Some x, Some y) -> compare x y
|
|
|
|
let is_some x =
|
|
match x with
|
|
| Some _ -> true
|
|
| None -> false
|
|
|
|
let is_none x =
|
|
match x with
|
|
| Some _ -> false
|
|
| None -> true |