Strive.Lenses

Lenses for easily getting and setting values.

Documentation

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

A lens for a record.

get :: Lens a b -> a -> b

Get a field from a record.

set :: Lens a b -> b -> a -> a

Set a field in a record.

update :: Lens a b -> (b -> b) -> a -> a

Update a field in a record