exception - 在Kotlin异常 block 中，如何实现 'else'(成功) block ？

Question

在Python中，我可以这样做:

try:
    some_func()
except Exception:
    handle_error()
else:
    print("some_func was successful")
    do_something_else()  # exceptions not handled here, deliberately
finally:
    print("this will be printed in any case")

我觉得这读起来很雅致；仅当未引发异常时才到达 else块。

在 Kotlin 如何做到这一点？我是否应该声明一个局部变量并在块下面进行检查？

try {
    some_func()
    // do_something_else() cannot be put here, because I don't want exceptions
    // to be handled the same as for the statement above.
} catch (e: Exception) {
    handle_error()
} finally {
    // reached in any case
}
// how to handle 'else' elegantly?

我找到了 Kotlin docs | Migrating from Python | Exceptions，但这没有涵盖Python中发现的 else块功能。

Answer 1

使用runCatching的另一种方法是使用Result的扩展功能

runCatching {
    someFunc()
}.onFailure { error ->
    handleError(error)
}.onSuccess { someFuncReturnValue ->
    handleSuccess(someFuncReturnValue)
}.getOrDefault(defaultValue)
    .also { finalValue ->
        doFinalStuff(finalValue)
    }

看看 Result的文档: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-result/index.html