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--------------------------------------------------------------------------------
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Copyright : (c) Daan Leijen 2002
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Maintainer : daan@cs.uu.nl
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Stability : provisional
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An implementation of John Hughes's efficient catenable sequence type. A lazy sequence
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@Seq a@ can be concatenated in /O(1)/ time. After
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construction, the sequence in converted in /O(n)/ time into a list.
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---------------------------------------------------------------------------------}
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module UU.DData.Seq( -- * Type
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{--------------------------------------------------------------------
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--------------------------------------------------------------------}
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(<>) :: Seq a -> Seq a -> Seq a
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{--------------------------------------------------------------------
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--------------------------------------------------------------------}
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newtype Seq a = Seq ([a] -> [a])
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{--------------------------------------------------------------------
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--------------------------------------------------------------------}
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cons :: a -> Seq a -> Seq a
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append :: Seq a -> Seq a -> Seq a
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append (Seq f) (Seq g)
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= Seq (\ts -> f (g ts))
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{--------------------------------------------------------------------
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--------------------------------------------------------------------}
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toList :: Seq a -> [a]
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fromList :: [a] -> Seq a
added
removed
src/UU/DData/Seq.hs
