22 lines
707 B
OCaml
22 lines
707 B
OCaml
(* let bindings for early return when encountering an error *)
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(* see https://ocaml.org/releases/4.13/htmlman/bindingops.html *)
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let ( let^? ) o f =
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match o with
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| Error e -> Error (Format.sprintf "db error: %s" (Caqti_error.show e))
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| Ok None -> Error "db error"
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| Ok (Some x) -> f x
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let ( let^ ) o f =
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match o with
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| Error e -> Error (Format.sprintf "db error: %s" (Caqti_error.show e))
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| Ok x -> f x
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let ( let* ) o f = Result.fold ~ok:f ~error:Result.error o
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let unwrap_list f ids =
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let l = List.map f ids in
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let res = List.find_opt Result.is_error l in
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match res with
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| None -> Ok (List.map Result.get_ok l)
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| Some (Ok _) -> assert false
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| Some (Error _e as error) -> error
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