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Clarify Unit representation in FFI code #223

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Sep 2, 2020
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Clarify Unit representation in FFI code #223

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3 changes: 3 additions & 0 deletions src/Data/Unit.purs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,9 @@ import Data.Show (class Show)
-- |
-- | `Unit` is often used, wrapped in a monadic type constructor, as the
-- | return type of a computation where only the _effects_ are important.
-- |
-- | When returning a value of type `Unit` from an FFI function, it is
-- | recommended to use `undefined`, or not return a value at all.
foreign import data Unit :: Type

-- | `unit` is the sole inhabitant of the `Unit` type.
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