```val thing = try { doSomethingOrNull()?.doSome...

# getting-started

[y]

val thing = try {
  doSomethingOrNull()?.doSomethingThatMayThrow()
} catch (_: MyException) {
  null
}

if (thing == null) {
  // log error and return
}

is there some syntax sugar to "catch" a null value from the try block, to get rid of the if block?
(I mean obviously not, but is there some alternative, such that thing is initialized to not-null and any exceptions are caught?)

[Thomas Urbanitsch]

I don’t think i understand your question, but i do have a feeling that looking into runCatching and the related Result helpers might help you 😅

[Thomas Urbanitsch]

e.g.

val thing = runCatching { 
    doSomethingOrNull()?.doSomethingThatMayThrow() 
}.onFailure {
    // log error and return
}.getOrNull()

[ephemient]

imo runCatching/Result is almost never the right tool. now all throwables are swallowed

[ephemient]

I'm not sure what OP is asking for either though

[Thomas Urbanitsch]

agree, but again i think i missed the point of the question (which is already implying that the Exception is not handled at all)

@y it might be more clear if you could explain why in your example you don’t just

val thing = try {
  doSomethingOrNull()?.doSomethingThatMayThrow()
} catch (_: MyException) {
  // log error and return
}

🤷

[Daniel Pitts]

The sugar you’re looking for is Elvis ?: , but as others have said, what you’re actually trying to do might not be the right way to do it.

Why not log and return from the catch itself?

[ephemient]

fun logError(e: MyException?) {}
val thing = try {
    doSomethingOrNull()?.doSomethingThatMayThrow()
} catch (e: MyException) {
    return logError(e)
} ?: return logError(null)

[y]

thanks. in retrospect I admit this was a frivolous request. my original code wasn't even especially verbose.

[Daniel Pitts]

No worries, understanding different ways to do the same thing is good. Sometimes you find out that the more terse approach isn’t more readable.

[y]

yeah. I wanted to: 1) handle a particular class of exceptions 2) propagate unexpected exceptions 3) handle nulls
that's fairly specific and the code should reflect that

[Daniel Pitts]

val thing = try {
  doSomethingOrNull() ?: run {
    logNull()
    return
  }
} catch (_: MyException) {
  handleException()
  return 
}

[Daniel Pitts]

is probably how I would write it.