invoke

operator fun <F, A> invoke(initial: A, CF: Concurrent<F>): Kind<F, MVar<F, A>>

Create an uncancellable MVar that’s initialized to an initial value.

import arrow.fx.*
import arrow.fx.extensions.io.concurrent.concurrent

fun main(args: Array<String>) {
  //sampleStart
  val mvar: IOOf<MVar<ForIO, Int>> = MVar.cancellable(5, IO.concurrent())
  //sampleEnd
}