How do I compose two coroutine libraries together?...

# arrow

[Bob Glamm]

How do I compose two coroutine libraries together? E.g., trying to bridge ktor and Arrow:

val q: (ApplicationCall) -> Kind<ForIO, Unit> = { c -> IO.fx().fx { c.respondText("Foo", ContentType.Text.Html) } }

c.respondText is a suspending function not in IO and @RestrictsSuspension on IO prevents the composition from occurring that way

[simon.vergauwen]

val q: (ApplicationCall) -> IO<Unit> =
  { c ->
    IO.effect { respondText("Foo", ContentType.Text.Html) }
}

As Raul mentioned with fun <A> effect(f: suspend () -> A): IO<A> you can lift suspending functions into IO.

[Bob Glamm]

Is that version of IO.effect newer than 0.9.0? The version in 0.9.0 does not take arguments but I really like the syntax

[simon.vergauwen]

Oh yes, that’s on master.