Module

Data.Lens.At

Package: purescript-profunctor-lenses
Repository: purescript-contrib/purescript-profunctor-lenses

#At Source

class (Index m a b) <= At m a b | m -> a, m -> b where

Members

at :: a -> Lens' m (Maybe b)

Instances

At (Identity a) Unit a
At (Maybe a) Unit a
(Ord v) => At (Set v) v Unit
(Ord k) => At (Map k v) k v
At (StrMap v) String v