reflex-basic-host-0.1: example/Main.hs

{-# LANGUAGE RecursiveDo #-}
module Main (
    main
  ) where

import Control.Monad (void)
import Control.Monad.Trans (liftIO)

import Reflex

import Reflex.Host.Basic

main :: IO ()
main = basicHostWithQuit $ mdo
  ePostBuild <- getPostBuild
  eLine <- performEventAsync $ (\fn -> liftIO $ fn =<< getLine) <$ leftmost [void eMessage, ePostBuild]

  let
    eMessage = ffilter (/= "quit") eLine
    eQuit = void . ffilter (== "quit") $ eLine

  performEvent_ $ liftIO . putStrLn <$> eMessage

  pure ((), eQuit)