Safe Haskell	None
Language	Haskell2010

Fresnel.Optional

Contents

Synopsis

type Optional s t a b = forall p. IsOptional p => Optic p s t a b
type Optional' s a = Optional s s a a
class (IsLens p, IsPrism p) => IsOptional p
optional :: (s -> Either t a) -> (s -> b -> t) -> Optional s t a b
optional' :: (s -> Maybe a) -> (s -> b -> s) -> Optional s s a b
matching :: Optional s t a b -> s -> Either t a
matching' :: Optional s t a b -> s -> Maybe a
withOptional :: Optional s t a b -> ((s -> Either t a) -> (s -> b -> t) -> r) -> r
traverseOf :: Functor f => Optional s t a b -> (forall r. r -> f r) -> (a -> f b) -> s -> f t
is :: Optional s t a b -> s -> Bool
isn't :: Optional s t a b -> s -> Bool
newtype UnpackedOptional a b s t = UnpackedOptional {
- withUnpackedOptional :: forall r. ((s -> Either t a) -> (s -> b -> t) -> r) -> r
}
unpackedOptional :: (s -> Either t a) -> (s -> b -> t) -> UnpackedOptional a b s t

Optionals

type Optional s t a b = forall p. IsOptional p => Optic p s t a b Source #

Instances details

Monad m => IsOptional (Kleisli m) Source #
Instance details Defined in Fresnel.Optional.Internal
Functor f => IsOptional (OptionalStar f) Source #
Instance details Defined in Fresnel.Optional.Internal
IsOptional ((->) :: Type -> Type -> Type) Source #
Instance details Defined in Fresnel.Optional.Internal
Monoid r => IsOptional (Forget r :: Type -> Type -> Type) Source #
Instance details Defined in Fresnel.Optional.Internal
Applicative f => IsOptional (Star f) Source #
Instance details Defined in Fresnel.Optional.Internal
IsOptional (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional

Construction

optional :: (s -> Either t a) -> (s -> b -> t) -> Optional s t a b Source #

optional' :: (s -> Maybe a) -> (s -> b -> s) -> Optional s s a b Source #

withOptional :: Optional s t a b -> ((s -> Either t a) -> (s -> b -> t) -> r) -> r Source #

traverseOf :: Functor f => Optional s t a b -> (forall r. r -> f r) -> (a -> f b) -> s -> f t Source #

is :: Optional s t a b -> s -> Bool Source #

Constructors

UnpackedOptional
Fields withUnpackedOptional :: forall r. ((s -> Either t a) -> (s -> b -> t) -> r) -> r

Instances details

Choice (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional Methods left' :: UnpackedOptional a b a0 b0 -> UnpackedOptional a b (Either a0 c) (Either b0 c) right' :: UnpackedOptional a b a0 b0 -> UnpackedOptional a b (Either c a0) (Either c b0)
Strong (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional Methods first' :: UnpackedOptional a b a0 b0 -> UnpackedOptional a b (a0, c) (b0, c) second' :: UnpackedOptional a b a0 b0 -> UnpackedOptional a b (c, a0) (c, b0)
Profunctor (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional Methods dimap :: (a0 -> b0) -> (c -> d) -> UnpackedOptional a b b0 c -> UnpackedOptional a b a0 d lmap :: (a0 -> b0) -> UnpackedOptional a b b0 c -> UnpackedOptional a b a0 c rmap :: (b0 -> c) -> UnpackedOptional a b a0 b0 -> UnpackedOptional a b a0 c (#.) :: forall a0 b0 c q. Coercible c b0 => q b0 c -> UnpackedOptional a b a0 b0 -> UnpackedOptional a b a0 c (.#) :: forall a0 b0 c q. Coercible b0 a0 => UnpackedOptional a b b0 c -> q a0 b0 -> UnpackedOptional a b a0 c
IsIso (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional
IsPrism (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional
IsLens (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional
IsOptional (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional

unpackedOptional :: (s -> Either t a) -> (s -> b -> t) -> UnpackedOptional a b s t Source #