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📝 Fresh.

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Rob Rix 2017-12-21 10:53:08 -05:00
parent a400be517f
commit 32215499f0
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src/Control/Monad/Effect/Fresh.hs
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@ -6,6 +6,7 @@ import Control.Monad.Effect.Internal
type TName = Int
-- | An effect offering a (resettable) sequence of always-incrementing, and therefore “fresh,” type variables.
data Fresh a where
Reset :: TName -> Fresh ()
Fresh :: Fresh TName