result-of-basic.kt

/* Copyright 2020 Seanghay Yath (@seanghay)
   SPDX-License-Identifier: Apache-2.0 */

sealed class ResultOf<out T> {
  data class Success<out R>(val value: R): ResultOf<R>()
  data class Failure(
     val message: String?, 
     val throwable: Throwable?
  ): ResultOf<Nothing>()
}