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Use MonadFail #9

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Use MonadFail #9

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2 changes: 2 additions & 0 deletions src/Control/Monad/Stream.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,8 @@ instance Monad Stream
Cons x xs >>= f = f x `mplus` suspended (xs >>= f)
Susp xs >>= f = suspended (xs >>= f)

instance MonadFail Stream
where
fail _ = Nil

instance MonadPlus Stream
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