Safe Haskell	None
Language	Haskell2010

Fresnel.Fold

Contents

Synopsis

type Fold s a = forall p. IsFold p => Optic' p s a
class (IsOptionalFold p, IsTraversal p) => IsFold p
folded :: Foldable f => Fold (f a) a
unfolded :: (s -> Maybe (a, s)) -> Fold s a
folding :: Foldable f => (s -> f a) -> Fold s a
foldring :: (forall f. Applicative f => (a -> f u -> f u) -> f v -> s -> f w) -> Fold s a
ignored :: Fold s a
backwards :: Fold s a -> Fold s a
has :: Fold s a -> s -> Bool
hasn't :: Fold s a -> s -> Bool
foldMapOf :: Monoid m => Fold s a -> (a -> m) -> s -> m
foldMapByOf :: Fold s a -> (r -> r -> r) -> r -> (a -> r) -> s -> r
foldrOf :: Fold s a -> (a -> r -> r) -> r -> s -> r
foldlOf' :: Fold s a -> (r -> a -> r) -> r -> s -> r
foldOf :: Monoid a => Fold s a -> s -> a
sequenceOf_ :: Applicative f => Fold s (f a) -> s -> f ()
traverseOf_ :: Applicative f => Fold s a -> (a -> f r) -> s -> f ()
forOf_ :: Applicative f => Fold s a -> s -> (a -> f r) -> f ()
toListOf :: Fold s a -> s -> [a]
anyOf :: Fold s a -> (a -> Bool) -> s -> Bool
allOf :: Fold s a -> (a -> Bool) -> s -> Bool
nullOf :: Fold s a -> s -> Bool
previews :: Fold s a -> (a -> r) -> s -> Maybe r
preview :: Fold s a -> s -> Maybe a
(^?) :: s -> Fold s a -> Maybe a
newtype Failover s a = Failover {
- getFailover :: Fold s a
}
newtype Union s a = Union {
- getUnion :: Fold s a
}

Folds

type Fold s a = forall p. IsFold p => Optic' p s a Source #

Instances details

Monoid r => IsFold (Forget r :: Type -> Type -> Type) Source #
Instance details Defined in Fresnel.Fold
(Applicative f, Traversable f, Contravariant f) => IsFold (Star f) Source #
Instance details Defined in Fresnel.Fold

Construction

unfolded :: (s -> Maybe (a, s)) -> Fold s a Source #

folding :: Foldable f => (s -> f a) -> Fold s a Source #

foldring :: (forall f. Applicative f => (a -> f u -> f u) -> f v -> s -> f w) -> Fold s a Source #

has :: Fold s a -> s -> Bool Source #

foldMapOf :: Monoid m => Fold s a -> (a -> m) -> s -> m Source #

foldMapByOf :: Fold s a -> (r -> r -> r) -> r -> (a -> r) -> s -> r Source #

foldrOf :: Fold s a -> (a -> r -> r) -> r -> s -> r Source #

foldlOf' :: Fold s a -> (r -> a -> r) -> r -> s -> r Source #

foldOf :: Monoid a => Fold s a -> s -> a Source #

traverseOf_ :: Applicative f => Fold s a -> (a -> f r) -> s -> f () Source #

forOf_ :: Applicative f => Fold s a -> s -> (a -> f r) -> f () Source #

toListOf :: Fold s a -> s -> [a] Source #

anyOf :: Fold s a -> (a -> Bool) -> s -> Bool Source #

allOf :: Fold s a -> (a -> Bool) -> s -> Bool Source #

previews :: Fold s a -> (a -> r) -> s -> Maybe r Source #

(^?) :: s -> Fold s a -> Maybe a infixl 8 Source #

Constructors

Failover
Fields getFailover :: Fold s a

Instances details

Semigroup (Failover s a) Source #
Instance details Defined in Fresnel.Fold Methods (<>) :: Failover s a -> Failover s a -> Failover s a # sconcat :: NonEmpty (Failover s a) -> Failover s a # stimes :: Integral b => b -> Failover s a -> Failover s a #
Monoid (Failover s a) Source #
Instance details Defined in Fresnel.Fold Methods mempty :: Failover s a # mappend :: Failover s a -> Failover s a -> Failover s a # mconcat :: [Failover s a] -> Failover s a #

newtype Union s a Source #

Constructors

Union
Fields getUnion :: Fold s a

Instances details

Semigroup (Union s a) Source #
Instance details Defined in Fresnel.Fold Methods (<>) :: Union s a -> Union s a -> Union s a # sconcat :: NonEmpty (Union s a) -> Union s a # stimes :: Integral b => b -> Union s a -> Union s a #
Monoid (Union s a) Source #
Instance details Defined in Fresnel.Fold Methods mempty :: Union s a # mappend :: Union s a -> Union s a -> Union s a # mconcat :: [Union s a] -> Union s a #