kresult-core/io.kresult.core/KResult/onFailure

onFailure

inline fun onFailure(action: (failure: E) -> Unit): KResult<E, T>(source)

Runs an action (side-effect) when the KResult is a Failure

import io.kresult.core.KResult
import io.kotest.matchers.shouldBe

fun test() {
  var result = ""

  KResult.Failure("test-failure")
    .onFailure {
      result += it
    }

  result shouldBe "test-failure"
}

Parameters

action

to run on failure results.