arrow-core/arrow.core.continuations/OptionEagerEffectScope/shift

shift

open suspend override fun <B> shift(r: None): B(source)

Short-circuit the EagerEffect computation with value R.

import arrow.core.continuations.eagerEffect
import io.kotest.assertions.fail
import io.kotest.matchers.shouldBe

fun main() {
  eagerEffect<String, Int> {
    shift("SHIFT ME")
  }.fold({ it shouldBe "SHIFT ME" }, { fail("Computation never finishes") })
}