Add a example

[jimmyhuco]

After upgrading Aff to 4.0.0, something has broken.

I think adding a example to demo routing in Halogen App is a good idea.

Powered By Halogen 3.0.1

[krisajenkins]

+1. I found that matchesAff no longer works the way it used to. I couldn't figure out what was broken, but FWIW I worked around it by subscribing to matches directly with something like this:

routing :: Routes
routing = ...

routeProducer ::
  forall eff. Producer Routes (Aff (avar :: AVAR | eff)) Unit
routeProducer = produce \emit -> do
  matches routing $ \old new -> emit $ Left new

[natefaubion]

@krisajenkins Yeah, that's probably the recommended why if you are using Aff. matchesAff is broken and should have been removed in the previous release. It relies on MonadCont semantics for Aff which hasn't been supported for some time.

[krisajenkins]

Thanks for confirming @natefaubion. :-)

So it seems like this this, #49, #40 and #42 are all the same issue then, right?