Result

data class Result<out R>(value: R?, exception: Throwable?)

一个包装了结果和异常的数据类

Constructors

Result

fun <out R> Result(value: R?, exception: Throwable?)

component1

operator fun component1(): R?

component2

operator fun component2(): Throwable?

copy

fun copy(value: R?, exception: Throwable?): Result<R>

equals

open operator override fun equals(other: Any?): Boolean

hashCode

open override fun hashCode(): Int

isSuccessful

fun isSuccessful(): Boolean

如果没有异常，则认为执行成功。并非代表得到了业务需要的值。

toString

open override fun toString(): String

exception

val exception: Throwable?

value

val value: R?