## asyncReadline as discussed at https://github.com/nim-lang/Nim/issues/11564

import asyncdispatch, threadpool

proc asyncReadline*(): Future[string] =
  let event = newAsyncEvent()
  let future = newFuture[string]("asyncReadline")
  proc readlineBackground(event: AsyncEvent): string =
    result = stdin.readline()
    event.trigger()
  let flowVar = spawn readlineBackground(event)
  proc callback(fd: AsyncFD): bool =
    future.complete(^flowVar)
    true                                                                                
  addEvent(event, callback)
  return future