43 lines
1.2 KiB
Kotlin
43 lines
1.2 KiB
Kotlin
package com.mikebull94.result
|
|
|
|
/**
|
|
* - Elm: [Result](http://package.elm-lang.org/packages/elm-lang/core/5.1.1/Result)
|
|
* - Haskell: [Data.Either](https://hackage.haskell.org/package/base-4.10.0.0/docs/Data-Either.html)
|
|
*/
|
|
sealed class Result<out V, out E>
|
|
|
|
fun <V> ok(value: V) = Ok<V, Nothing>(value)
|
|
fun <E> error(error: E) = Error<Nothing, E>(error)
|
|
|
|
class Ok<out V, out E> internal constructor(val value: V) : Result<V, E>() {
|
|
override fun equals(other: Any?): Boolean {
|
|
if (this === other) return true
|
|
if (javaClass != other?.javaClass) return false
|
|
|
|
other as Ok<*, *>
|
|
|
|
if (value != other.value) return false
|
|
|
|
return true
|
|
}
|
|
|
|
override fun hashCode() = value?.hashCode() ?: 0
|
|
override fun toString() = "Result.Ok($value)"
|
|
}
|
|
|
|
class Error<out V, out E> internal constructor(val error: E) : Result<V, E>() {
|
|
override fun equals(other: Any?): Boolean {
|
|
if (this === other) return true
|
|
if (javaClass != other?.javaClass) return false
|
|
|
|
other as Error<*, *>
|
|
|
|
if (error != other.error) return false
|
|
|
|
return true
|
|
}
|
|
|
|
override fun hashCode() = error?.hashCode() ?: 0
|
|
override fun toString() = "Result.Error($error)"
|
|
}
|