Safe Haskell	Safe-Inferred
Language	Haskell2010

Fresnel.Lens

Contents

Synopsis

type Lens s t a b = forall p. IsLens p => Optic p s t a b
type Lens' s a = Lens s s a a
class (IsIso p, Strong p) => IsLens p
lens :: (s -> a) -> (s -> b -> t) -> Lens s t a b
withLens :: Lens s t a b -> ((s -> a) -> (s -> b -> t) -> r) -> r
alongside :: Lens s1 t1 a1 b1 -> Lens s2 t2 a2 b2 -> Lens (s1, s2) (t1, t2) (a1, a2) (b1, b2)
newtype UnpackedLens a b s t = UnpackedLens {
- withUnpackedLens :: forall r. ((s -> a) -> (s -> b -> t) -> r) -> r
}
unpackedLens :: (s -> a) -> (s -> b -> t) -> UnpackedLens a b s t

Lenses

type Lens s t a b = forall p. IsLens p => Optic p s t a b Source #

type Lens' s a = Lens s s a a Source #

class (IsIso p, Strong p) => IsLens p Source #

Instances details

Monad m => IsLens (Kleisli m) Source #
Instance details Defined in Fresnel.Lens.Internal
Functor f => IsLens (OptionalStar f) Source #
Instance details Defined in Fresnel.Lens.Internal
IsLens (UnpackedLens a b) Source #
Instance details Defined in Fresnel.Lens
IsLens (UnpackedOptional a b) Source #
Instance details Defined in Fresnel.Optional
IsLens (Forget r :: Type -> Type -> TYPE LiftedRep) Source #
Instance details Defined in Fresnel.Lens.Internal
Functor f => IsLens (Star f) Source #
Instance details Defined in Fresnel.Lens.Internal
IsLens (->) Source #
Instance details Defined in Fresnel.Lens.Internal

Construction

lens :: (s -> a) -> (s -> b -> t) -> Lens s t a b Source #

withLens :: Lens s t a b -> ((s -> a) -> (s -> b -> t) -> r) -> r Source #

alongside :: Lens s1 t1 a1 b1 -> Lens s2 t2 a2 b2 -> Lens (s1, s2) (t1, t2) (a1, a2) (b1, b2) Source #

A Lens unpacked into the get & set functions it was constructed from.

Constructors

UnpackedLens
Fields withUnpackedLens :: forall r. ((s -> a) -> (s -> b -> t) -> r) -> r

Instances details

IsIso (UnpackedLens a b) Source #
Instance details Defined in Fresnel.Lens
IsLens (UnpackedLens a b) Source #
Instance details Defined in Fresnel.Lens
Strong (UnpackedLens a b) Source #
Instance details Defined in Fresnel.Lens Methods first' :: UnpackedLens a b a0 b0 -> UnpackedLens a b (a0, c) (b0, c) second' :: UnpackedLens a b a0 b0 -> UnpackedLens a b (c, a0) (c, b0)
Profunctor (UnpackedLens a b) Source #
Instance details Defined in Fresnel.Lens Methods dimap :: (a0 -> b0) -> (c -> d) -> UnpackedLens a b b0 c -> UnpackedLens a b a0 d lmap :: (a0 -> b0) -> UnpackedLens a b b0 c -> UnpackedLens a b a0 c rmap :: (b0 -> c) -> UnpackedLens a b a0 b0 -> UnpackedLens a b a0 c (#.) :: forall a0 b0 c q. Coercible c b0 => q b0 c -> UnpackedLens a b a0 b0 -> UnpackedLens a b a0 c (.#) :: forall a0 b0 c q. Coercible b0 a0 => UnpackedLens a b b0 c -> q a0 b0 -> UnpackedLens a b a0 c

unpackedLens :: (s -> a) -> (s -> b -> t) -> UnpackedLens a b s t Source #