arrow-core/arrow.core.continuations/OptionEffectScope/shift

shift

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

Short-circuit the Effect computation with value R.

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

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