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Add a lower method to LiftEffect.

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This commit is contained in:
Rob Rix 2018-03-07 17:34:17 -05:00
parent 1f7d9672ea
commit 45fccdc7dc
1 changed files with 2 additions and 0 deletions
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src/Control/Effect.hs
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@ -68,6 +68,8 @@ instance Ord a => RunEffect NonDetEff a where
class LiftEffect f where
lift :: Eff effects a -> f effects a
lower :: f effects a -> Eff effects a
instance LiftEffect Eff where
lift = id
lower = id