Numeric.QuadraticIrrational.Internal.Lens

A tiny implementation of some lens primitives. Please see http://hackage.haskell.org/package/lens for proper documentation.

Documentation

type Lens s t a b = forall f. Functor f => (a -> f b) -> s -> f t

type Traversal s t a b = forall f. Applicative f => (a -> f b) -> s -> f t

type Lens' s a = forall f. Functor f => (a -> f a) -> s -> f s

type Traversal' s a = forall f. Applicative f => (a -> f a) -> s -> f s

type Getting r s a = (a -> Const r a) -> s -> Const r s

type Setting s t a b = (a -> Identity b) -> s -> Identity t

view :: Getting a s a -> s -> a

over :: Setting s t a b -> (a -> b) -> s -> t

set :: Setting s t a b -> b -> s -> t