Safe Haskell	Safe-Inferred
Language	Haskell2010

Control.Foldl.NonEmpty

Description

This module provides a Fold1 type that is a "non-empty" analog of the Fold type, meaning that it requires at least one input element in order to produce a result

This module does not provide all of the same utilities as the Control.Foldl module. Instead, this module only provides the utilities which can make use of the non-empty input guarantee (e.g. head). For all other utilities you can convert them from the equivalent Fold using fromFold.

Synopsis

data Fold1 a b = Fold1 (a -> Fold a b)
fold1 :: Foldable1 f => Fold1 a b -> f a -> b
fromFold :: Fold a b -> Fold1 a b
toFold :: Fold1 a b -> Fold a (Maybe b)
nonEmpty :: Fold1 a (NonEmpty a)
sconcat :: Semigroup a => Fold1 a a
head :: Fold1 a a
last :: Fold1 a a
maximum :: Ord a => Fold1 a a
maximumBy :: (a -> a -> Ordering) -> Fold1 a a
minimum :: Ord a => Fold1 a a
minimumBy :: (a -> a -> Ordering) -> Fold1 a a

Documentation

data Fold1 a b Source #

A Fold1 is like a Fold except that it consumes at least one input element

Constructors

Fold1 (a -> Fold a b)

Instances

Instances details

Profunctor Fold1 Source #
Instance details Defined in Control.Foldl.NonEmpty Methods dimap :: (a -> b) -> (c -> d) -> Fold1 b c -> Fold1 a d Source # lmap :: (a -> b) -> Fold1 b c -> Fold1 a c Source # rmap :: (b -> c) -> Fold1 a b -> Fold1 a c Source # (#.) :: forall a b c q. Coercible c b => q b c -> Fold1 a b -> Fold1 a c Source # (.#) :: forall a b c q. Coercible b a => Fold1 b c -> q a b -> Fold1 a c Source #
Applicative (Fold1 a) Source #
Instance details Defined in Control.Foldl.NonEmpty Methods pure :: a0 -> Fold1 a a0 # (<>) :: Fold1 a (a0 -> b) -> Fold1 a a0 -> Fold1 a b # liftA2 :: (a0 -> b -> c) -> Fold1 a a0 -> Fold1 a b -> Fold1 a c # (>) :: Fold1 a a0 -> Fold1 a b -> Fold1 a b # (<*) :: Fold1 a a0 -> Fold1 a b -> Fold1 a a0 #
Functor (Fold1 a) Source #
Instance details Defined in Control.Foldl.NonEmpty Methods fmap :: (a0 -> b) -> Fold1 a a0 -> Fold1 a b # (<$) :: a0 -> Fold1 a b -> Fold1 a a0 #
Monoid b => Monoid (Fold1 a b) Source #
Instance details Defined in Control.Foldl.NonEmpty Methods mempty :: Fold1 a b # mappend :: Fold1 a b -> Fold1 a b -> Fold1 a b # mconcat :: [Fold1 a b] -> Fold1 a b #
Semigroup b => Semigroup (Fold1 a b) Source #
Instance details Defined in Control.Foldl.NonEmpty Methods (<>) :: Fold1 a b -> Fold1 a b -> Fold1 a b # sconcat :: NonEmpty (Fold1 a b) -> Fold1 a b # stimes :: Integral b0 => b0 -> Fold1 a b -> Fold1 a b #
Floating b => Floating (Fold1 a b) Source #
Instance details Defined in Control.Foldl.NonEmpty Methods pi :: Fold1 a b # exp :: Fold1 a b -> Fold1 a b # log :: Fold1 a b -> Fold1 a b # sqrt :: Fold1 a b -> Fold1 a b # (**) :: Fold1 a b -> Fold1 a b -> Fold1 a b # logBase :: Fold1 a b -> Fold1 a b -> Fold1 a b # sin :: Fold1 a b -> Fold1 a b # cos :: Fold1 a b -> Fold1 a b # tan :: Fold1 a b -> Fold1 a b # asin :: Fold1 a b -> Fold1 a b # acos :: Fold1 a b -> Fold1 a b # atan :: Fold1 a b -> Fold1 a b # sinh :: Fold1 a b -> Fold1 a b # cosh :: Fold1 a b -> Fold1 a b # tanh :: Fold1 a b -> Fold1 a b # asinh :: Fold1 a b -> Fold1 a b # acosh :: Fold1 a b -> Fold1 a b # atanh :: Fold1 a b -> Fold1 a b # log1p :: Fold1 a b -> Fold1 a b # expm1 :: Fold1 a b -> Fold1 a b # log1pexp :: Fold1 a b -> Fold1 a b # log1mexp :: Fold1 a b -> Fold1 a b #
Num b => Num (Fold1 a b) Source #
Instance details Defined in Control.Foldl.NonEmpty Methods (+) :: Fold1 a b -> Fold1 a b -> Fold1 a b # (-) :: Fold1 a b -> Fold1 a b -> Fold1 a b # (*) :: Fold1 a b -> Fold1 a b -> Fold1 a b # negate :: Fold1 a b -> Fold1 a b # abs :: Fold1 a b -> Fold1 a b # signum :: Fold1 a b -> Fold1 a b # fromInteger :: Integer -> Fold1 a b #
Fractional b => Fractional (Fold1 a b) Source #
Instance details Defined in Control.Foldl.NonEmpty Methods (/) :: Fold1 a b -> Fold1 a b -> Fold1 a b # recip :: Fold1 a b -> Fold1 a b # fromRational :: Rational -> Fold1 a b #