deque-0.4.4.1: library/Deque/Lazy.hs

-- |
-- Definitions of lazy Deque.
--
-- The typical `toList` and `fromList` conversions are provided by means of
-- the `Foldable` and `IsList` instances.
module Deque.Lazy
  ( LazyDefs.Deque,
    fromStrict,
    toStrict,
    LazyDefs.fromConsAndSnocLists,
    LazyDefs.cons,
    LazyDefs.snoc,
    LazyDefs.reverse,
    LazyDefs.shiftLeft,
    LazyDefs.shiftRight,
    LazyDefs.filter,
    LazyDefs.take,
    LazyDefs.drop,
    LazyDefs.takeWhile,
    LazyDefs.dropWhile,
    LazyDefs.span,
    LazyDefs.uncons,
    LazyDefs.unsnoc,
    LazyDefs.null,
    LazyDefs.head,
    LazyDefs.last,
    LazyDefs.tail,
    LazyDefs.init,
  )
where

import qualified Deque.Lazy.Defs as LazyDefs
import Deque.Prelude
import qualified Deque.Strict.Defs as StrictDefs

-- | Convert strict deque to lazy deque.
fromStrict :: StrictDefs.Deque a -> LazyDefs.Deque a
fromStrict (StrictDefs.Deque consList snocList) = LazyDefs.Deque (toList consList) (toList snocList)

-- | Convert lazy deque to strict deque.
toStrict :: LazyDefs.Deque a -> StrictDefs.Deque a
toStrict (LazyDefs.Deque consList snocList) = StrictDefs.Deque (fromList consList) (fromList snocList)