(record Result/Ok value)
(record Result/Ex value)

(let Result/ok Result/Ok/create)
(let Result/ex Result/Ex/create)

(let Result/map (\[f m]
    (match (kind m)
        "Result/Ok" (Result/ok (f (Result/Ok/get-value m)))
        "Result/Ex" m)))

(let Result/map-ex (\[f m]
    (match (kind m)
        "Result/Ok" m
        "Result/Ex" (Result/ex (f (Result/Ex/get-value m))))))

(let Result/and-then (\[f m]
    (match (kind m)
        "Result/Ok" (f (Result/Ok/get-value m))
        "Result/Ex" m)))

(let Result/try (\[catch-f m]
    (match (kind m)
        "Result/Ok" (Result/Ok/get-value m)
        "Result/Ex" (catch-f (Result/Ex/get-value m)))))