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(record Maybe/Just value)
(record Maybe/Nothing)
(let Maybe/just Maybe/Just/create)
(let Maybe/nothing Maybe/Nothing/create)
(let Maybe/map (\[f m]
(match (kind m)
"Maybe/Just" (Maybe/just (f (Maybe/Just/get-value m)))
"Maybe/Nothing" (Maybe/nothing))))
(let Maybe/and-then (\[f m]
(match (kind m)
"Maybe/Just" (f (Maybe/Just/get-value m))
"Maybe/Nothing" (Maybe/nothing))))
(let Maybe/default (\[default m]
(match (kind m)
"Maybe/Just" (Maybe/Just/get-value m)
"Result/Ex" default)))
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