{-# LANGUAGE BangPatterns #-} {-# LANGUAGE LambdaCase #-} {-# LANGUAGE MagicHash #-} {-# LANGUAGE PatternSynonyms #-} {-# LANGUAGE UnboxedSums #-} {-# LANGUAGE UnboxedTuples #-} module Data.Maybe.Unpacked.Numeric.Int32 ( Maybe(..) , just , nothing , maybe , isJust , isNothing , fromMaybe , listToMaybe , maybeToList , catMaybes , mapMaybe , toBaseMaybe , fromBaseMaybe ) where import Prelude hiding (Maybe,maybe) import GHC.Exts import GHC.Int (Int32) import GHC.Int.Compat (pattern I32#) import GHC.Read (Read(readPrec)) import Text.Read (parens, Lexeme(Ident), lexP, (+++)) import Text.ParserCombinators.ReadPrec (prec, step) import qualified Prelude as P data Maybe = M Int# instance Eq Maybe where Maybe ma == :: Maybe -> Maybe -> Bool == Maybe mb = forall a. a -> (Int32 -> a) -> Maybe -> a maybe (Maybe -> Bool isNothing Maybe mb) (\Int32 a -> forall a. a -> (Int32 -> a) -> Maybe -> a maybe Bool False (\Int32 b -> Int32 a forall a. Eq a => a -> a -> Bool == Int32 b) Maybe mb) Maybe ma {-# INLINE (==) #-} instance Ord Maybe where compare :: Maybe -> Maybe -> Ordering compare Maybe ma Maybe mb = forall a. a -> (Int32 -> a) -> Maybe -> a maybe Ordering LT (\Int32 a -> forall a. a -> (Int32 -> a) -> Maybe -> a maybe Ordering GT (forall a. Ord a => a -> a -> Ordering compare Int32 a) Maybe mb) Maybe ma {-# INLINE compare #-} instance Show Maybe where showsPrec :: Int -> Maybe -> ShowS showsPrec Int p Maybe m = forall a. a -> (Int32 -> a) -> Maybe -> a maybe (String -> ShowS showString String "nothing") (\Int32 i -> Bool -> ShowS -> ShowS showParen (Int p forall a. Ord a => a -> a -> Bool > Int 10) forall a b. (a -> b) -> a -> b $ String -> ShowS showString String "just " forall b c a. (b -> c) -> (a -> b) -> a -> c . forall a. Show a => Int -> a -> ShowS showsPrec Int 11 Int32 i ) Maybe m instance Read Maybe where readPrec :: ReadPrec Maybe readPrec = forall a. ReadPrec a -> ReadPrec a parens forall a b. (a -> b) -> a -> b $ ReadPrec Maybe nothingP forall a. ReadPrec a -> ReadPrec a -> ReadPrec a +++ ReadPrec Maybe justP where nothingP :: ReadPrec Maybe nothingP = do Ident String "nothing" <- ReadPrec Lexeme lexP forall (m :: * -> *) a. Monad m => a -> m a return Maybe nothing justP :: ReadPrec Maybe justP = forall a. Int -> ReadPrec a -> ReadPrec a prec Int 10 forall a b. (a -> b) -> a -> b $ do Ident String "just" <- ReadPrec Lexeme lexP Int32 a <- forall a. ReadPrec a -> ReadPrec a step forall a. Read a => ReadPrec a readPrec forall (m :: * -> *) a. Monad m => a -> m a return (Int32 -> Maybe just Int32 a) listToMaybe :: [Int32] -> Maybe {-# INLINE listToMaybe #-} listToMaybe :: [Int32] -> Maybe listToMaybe [] = Maybe nothing listToMaybe (Int32 x:[Int32] _) = Int32 -> Maybe just Int32 x maybeToList :: Maybe -> [Int32] maybeToList :: Maybe -> [Int32] maybeToList Maybe m = forall a. a -> (Int32 -> a) -> Maybe -> a maybe [] (forall a. a -> [a] -> [a] : []) Maybe m catMaybes :: [Maybe] -> [Int32] catMaybes :: [Maybe] -> [Int32] catMaybes [Maybe] ms = forall a. (a -> Maybe) -> [a] -> [Int32] mapMaybe forall a. a -> a id [Maybe] ms mapMaybe :: (a -> Maybe) -> [a] -> [Int32] mapMaybe :: forall a. (a -> Maybe) -> [a] -> [Int32] mapMaybe a -> Maybe _ [] = [] mapMaybe a -> Maybe f (a a : [a] as) = let ws :: [Int32] ws = forall a. (a -> Maybe) -> [a] -> [Int32] mapMaybe a -> Maybe f [a] as in forall a. a -> (Int32 -> a) -> Maybe -> a maybe [Int32] ws (forall a. a -> [a] -> [a] : [Int32] ws) (a -> Maybe f a a) {-# NOINLINE [1] mapMaybe #-} {-# RULES "mapMaybe" [~1] forall f xs. mapMaybe f xs = build (\c n -> foldr (mapMaybeFB c f) n xs) "mapMaybeList" [1] forall f. foldr (mapMaybeFB (:) f) [] = mapMaybe f #-} {-# NOINLINE [0] mapMaybeFB #-} mapMaybeFB :: (Int32 -> r -> r) -> (a -> Maybe) -> a -> r -> r mapMaybeFB :: forall r a. (Int32 -> r -> r) -> (a -> Maybe) -> a -> r -> r mapMaybeFB Int32 -> r -> r cons a -> Maybe f a x r next = forall a. a -> (Int32 -> a) -> Maybe -> a maybe r next (forall a b c. (a -> b -> c) -> b -> a -> c flip Int32 -> r -> r cons r next) (a -> Maybe f a x) isNothing :: Maybe -> Bool {-# INLINE isNothing #-} isNothing :: Maybe -> Bool isNothing Maybe m = forall a. a -> (Int32 -> a) -> Maybe -> a maybe Bool True (forall a b. a -> b -> a const Bool False) Maybe m isJust :: Maybe -> Bool {-# INLINE isJust #-} isJust :: Maybe -> Bool isJust Maybe m = forall a. a -> (Int32 -> a) -> Maybe -> a maybe Bool False (forall a b. a -> b -> a const Bool True) Maybe m nothing :: Maybe {-# INLINE nothing #-} nothing :: Maybe nothing = Int# -> Maybe M Int# 2147483648# just :: Int32 -> Maybe {-# INLINE just #-} just :: Int32 -> Maybe just (I32# Int# i) = Int# -> Maybe M Int# i fromMaybe :: Int32 -> Maybe -> Int32 {-# INLINE fromMaybe #-} fromMaybe :: Int32 -> Maybe -> Int32 fromMaybe Int32 a Maybe m = forall a. a -> (Int32 -> a) -> Maybe -> a maybe Int32 a forall a. a -> a id Maybe m maybe :: a -> (Int32 -> a) -> Maybe -> a {-# INLINE maybe #-} maybe :: forall a. a -> (Int32 -> a) -> Maybe -> a maybe a a Int32 -> a f (M Int# m) = case Int# m Int# -> Int# -> Int# ># Int# 2147483647# of Int# 1# -> a a Int# _ -> case Int# m Int# -> Int# -> Int# <# Int# -2147483648# of Int# 1# -> a a Int# _ -> Int32 -> a f (Int# -> Int32 I32# Int# m) toBaseMaybe :: Maybe -> P.Maybe Int32 {-# INLINE toBaseMaybe #-} toBaseMaybe :: Maybe -> Maybe Int32 toBaseMaybe Maybe m = forall a. a -> (Int32 -> a) -> Maybe -> a maybe forall a. Maybe a P.Nothing forall a. a -> Maybe a P.Just Maybe m fromBaseMaybe :: P.Maybe Int32 -> Maybe {-# INLINE fromBaseMaybe #-} fromBaseMaybe :: Maybe Int32 -> Maybe fromBaseMaybe Maybe Int32 m = forall b a. b -> (a -> b) -> Maybe a -> b P.maybe Maybe nothing Int32 -> Maybe just Maybe Int32 m