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Within LTS Haskell 24.32 (ghc-9.10.3)
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enumFromTo :: Enum a => a -> a -> [a]faktory Faktory.Prelude Used in Haskell's translation of [n..m] with [n..m] = enumFromTo n m, a possible implementation being
enumFromTo n m | n <= m = n : enumFromTo (succ n) m | otherwise = []
Examples
enumFromTo 6 10 :: [Int] = [6,7,8,9,10]
enumFromTo 42 1 :: [Integer] = []
enumVal :: (Bounded a, Enum a, Show a) => Reader aflags-applicative Flags.Applicative Returns a reader for Enum instances. This reader assumes that enum (Haskell) constructors are written in PascalCase and expects UPPER_SNAKE_CASE as command-line flag values. For example:
data Mode = Flexible | Strict deriving (Bounded, Enum, Show) modeFlag = flag enumVal "mode" "the mode" :: FlagsParser Mode
The above flag will accept values --mode=FLEXIBLE and --mode=STRICT.enumeratePrinters :: (HasCallStack, MonadIO m) => PrinterFunc -> Bool -> m ()gi-gtk4 GI.Gtk.Functions Calls a function for all GtkPrinters. If func returns True, the enumeration is stopped.
enumFrom :: Enum a => a -> [a]hledger-web Hledger.Web.Import Used in Haskell's translation of [n..] with [n..] = enumFrom n, a possible implementation being enumFrom n = n : enumFrom (succ n).
Examples
enumFrom 4 :: [Integer] = [4,5,6,7,...]
enumFrom 6 :: [Int] = [6,7,8,9,...,maxBound :: Int]
enumFromThen :: Enum a => a -> a -> [a]hledger-web Hledger.Web.Import Used in Haskell's translation of [n,n'..] with [n,n'..] = enumFromThen n n', a possible implementation being enumFromThen n n' = n : n' : worker (f x) (f x n'), worker s v = v : worker s (s v), x = fromEnum n' - fromEnum n and
f n y | n > 0 = f (n - 1) (succ y) | n < 0 = f (n + 1) (pred y) | otherwise = y
Examples
enumFromThen 4 6 :: [Integer] = [4,6,8,10...]
enumFromThen 6 2 :: [Int] = [6,2,-2,-6,...,minBound :: Int]
enumFromThenTo :: Enum a => a -> a -> a -> [a]hledger-web Hledger.Web.Import Used in Haskell's translation of [n,n'..m] with [n,n'..m] = enumFromThenTo n n' m, a possible implementation being enumFromThenTo n n' m = worker (f x) (c x) n m, x = fromEnum n' - fromEnum n, c x = bool (>=) ((x 0)
f n y | n > 0 = f (n - 1) (succ y) | n < 0 = f (n + 1) (pred y) | otherwise = y
andworker s c v m | c v m = v : worker s c (s v) m | otherwise = []
Examples
enumFromThenTo 4 2 -6 :: [Integer] = [4,2,0,-2,-4,-6]
enumFromThenTo 6 8 2 :: [Int] = []
enumFromTo :: Enum a => a -> a -> [a]hledger-web Hledger.Web.Import Used in Haskell's translation of [n..m] with [n..m] = enumFromTo n m, a possible implementation being
enumFromTo n m | n <= m = n : enumFromTo (succ n) m | otherwise = []
Examples
enumFromTo 6 10 :: [Int] = [6,7,8,9,10]
enumFromTo 42 1 :: [Integer] = []
enumDeltaInteger :: forall (m :: Type -> Type) . Monad m => Integer -> Integer -> Stream m Integerleveldb-haskell Data.Stream.Monadic Like fromList ([n,n+d..] :: [Integer]) but avoids allocating a list
enumFromToChar :: forall (m :: Type -> Type) . Monad m => Char -> Char -> Stream m Charleveldb-haskell Data.Stream.Monadic Like fromList ([n..m] :: [Char]) but avoids allocating a list
enumFromToInt :: forall (m :: Type -> Type) . Monad m => Int -> Int -> Stream m Intleveldb-haskell Data.Stream.Monadic Like fromList ([n..m] :: [Int]) but avoids allocating a list