This repository implements a generalized version of reactive programming, on
top of which other variants like Yampa, Classic FRP and Reactive Values can
It is a fork of
dunai and just contains the core library,
with a few minor modifications.
The main reason this fork exists is as a dependency for
where support for GHC 8.6 and current stack nightly is wanted.
It might disappear in the future.
If in doubt, you should choose
$ cabal sandbox init # Optional, but recommended $ cabal update $ cabal install dunai
$ git clone https://github.com/turion/dunai-core $ cd dunai-core $ stack build
Dunai currently support GHC versions 8.2.1 to 8.6.
To test Dunai:
embed :: MSF m a b -> [a] -> m [b]to collect a list with the results.
embed_ :: MSF m a () -> [a] -> m ()to perform side effects without collecting the results.
reactimate :: MSF m () () -> m ()when data is collected/provided by the MSF itself.
ghci> import Data.MonadicStreamFunction ghci> embed (arr (+1)) [1,2,3,4,5] [2,3,4,5,6] ghci> embed_ (arr (+1) >>> liftS print) [1,2,3,4,5] 2 3 4 5 6 ghci> reactimate (arrM_ getLine >>> arr reverse >>> liftS putStrLn) Hello olleH Haskell is awesome emosewa si lleksaH ^C
The best introduction to the fundamentals of Monadic Stream Functions is:
The following papers are also related to MSFs:
About the name
Dunai (aka. Danube, or Дунай) is one of the main rivers in Europe, originating in Germany and touching Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova and Ukraine.
Other FRP libraries, like Yampa, are named after rivers. Dunai has been chosen due to the authors' relation with some of the countries it passes through, and knowing that this library has helped unite otherwise very different people from different backgrounds.