Box.Updater

based on https://github.com/Gabriel439/Haskell-MVC-Updates-Library

Documentation

data Updater a

An updater of a value a, where the updating process consists of an IO fold over an emitter

Constructors

Updater (FoldM IO e a) (Cont IO (Emitter STM e))

Instances

Functor Updater

Defined in Box.Updater

Methods

fmap :: (a -> b) -> Updater a -> Updater b

(<$) :: a -> Updater b -> Updater a

Applicative Updater

Defined in Box.Updater

Methods

pure :: a -> Updater a

(<*>) :: Updater (a -> b) -> Updater a -> Updater b

liftA2 :: (a -> b -> c) -> Updater a -> Updater b -> Updater c

(*>) :: Updater a -> Updater b -> Updater b

(<*) :: Updater a -> Updater b -> Updater a

updater :: Fold e a -> Cont IO (Emitter STM e) -> Updater a

Create an Updatable value using a pure Fold

listen :: (a -> IO ()) -> Updater a -> Updater a

run an action on each update > listen mempty = id > > listen (f <> g) = listen g . listen f

updates :: Updater a -> Cont IO (Emitter STM a)