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📝 storeLookup.

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Rob Rix 2017-12-20 17:17:39 -05:00
parent 26946fce96
commit 48ac9e284a
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src/Data/Abstract/Store.hs
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@ -24,6 +24,7 @@ deriving instance Foldable (Cell l) => Foldable (Store l)
deriving instance Functor (Cell l) => Functor (Store l)
deriving instance Traversable (Cell l) => Traversable (Store l)
-- | Look up the cell of values for an 'Address' in a 'Store', if any.
storeLookup :: Ord l => Address l a -> Store l a -> Maybe (Cell l a)
storeLookup (Address address) = Map.lookup address . unStore