get

abstract fun get(): Kind<F, A>

Get the promised value. Suspending the Fiber running the action until the result is available.

import arrow.fx.*
import arrow.fx.typeclasses.*
import arrow.fx.extensions.io.async.async
import arrow.fx.extensions.io.monad.flatMap

fun main(args: Array<String>) {
  //sampleStart
  val promise = Promise.uncancellable<ForIO, Int>(IO.async())

  promise.flatMap { p ->
    p.get()
  }  //Never ends since is uncancellable

  promise.flatMap { p ->
    p.complete(1).flatMap {
      p.get()
    }
  }.unsafeRunSync() == IO.just(1).unsafeRunSync()
  //sampleEnd
}