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Within LTS Haskell 24.33 (ghc-9.10.3)
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enumFromThenTo :: Enum a => a -> a -> a -> [a]mixed-types-num Numeric.MixedTypes.PreludeHiding 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]mixed-types-num Numeric.MixedTypes.PreludeHiding 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] = []
enumFromN :: Num a => a -> Int -> Maybe (NonEmptyVector a)nonempty-vector Data.Vector.NonEmpty O(n) Yield a non-emptyvector of the given length containing the values x, x+1 etc. This operation is usually more efficient than enumFromTo. If an enumeration does not use meaningful indices, Nothing is returned, otherwise, Just containing a non-empty vector.
enumFromN1 :: Num a => a -> Int -> NonEmptyVector anonempty-vector Data.Vector.NonEmpty O(n) Yield a non-emptyvector of length max n 1 containing the values x, x+1 etc. This operation is usually more efficient than enumFromTo.
enumFromStepN :: Num a => a -> a -> Int -> Maybe (NonEmptyVector a)nonempty-vector Data.Vector.NonEmpty O(n) Yield a non-empty vector of the given length containing the values x, x+y, x+y+y etc. This operations is usually more efficient than enumFromThenTo. If an enumeration does not use meaningful indices, Nothing is returned, otherwise, Just containing a non-empty vector.
enumFromStepN1 :: Num a => a -> a -> Int -> NonEmptyVector anonempty-vector Data.Vector.NonEmpty O(n) Yield a non-empty vector of length max n 1 containing the values x, x+y, x+y+y etc. This operations is usually more efficient than enumFromThenTo.
enumFromThenTo :: Enum a => a -> a -> a -> Maybe (NonEmptyVector a)nonempty-vector Data.Vector.NonEmpty O(n) Enumerate values from x to y with a specific step z. If an enumeration does not use meaningful indices, Nothing is returned, otherwise, Just containing a non-empty vector. WARNING: This operation can be very inefficient. If at all possible, use enumFromStepN instead.
enumFromTo :: Enum a => a -> a -> Maybe (NonEmptyVector a)nonempty-vector Data.Vector.NonEmpty O(n) Enumerate values from x to y. If an enumeration does not use meaningful indices, Nothing is returned, otherwise, Just containing a non-empty vector. WARNING: This operation can be very inefficient. If at all possible, use enumFromN instead.
enumUniform :: forall a (m :: Type -> Type) . Enum a => a -> a -> RVarT m arandom-fu Data.Random.Distribution.Uniform realFloatUniform a b computes a uniform random value in the range [a,b) for any Enum type
enumUniformCDF :: (Enum a, Ord a) => a -> a -> a -> Doublerandom-fu Data.Random.Distribution.Uniform No documentation available.