Hi, my proposal is to allow braces-less `try`/`cat...

# language-proposals

[louiscad]

Hi, my proposal is to allow braces-less `try`/`catch`/`finally` as done for `if`/`else`.
Here's an example of how it could look like:

try registerAppInstance(info = AppInstanceInfo(
    someToken = someValue
)) catch (e: HttpException) ui.showError(
    when (val code = e.code()) {
        503 -> ServiceUnavailableTryLater
        ...
        else -> ...
    }
)

[DALDEI]

Why stop there -- make the "when" clause braceless too

[gildor]

looks messy on this example:

try {
    registerAppInstance(info = AppInstanceInfo(
        someToken = someValue
    ))
} catch (e: HttpException) {
    ui.showError(
        when (val code = e.code()) {
            503 -> ServiceUnavailableTryLater
                ...
            else -> ...
        }
    )
}

Reads much better

[gildor]

But I agree, maybe in some cases it would work better, but such code would not probably pass code review, the same way as complex if/else without braces

[louiscad]

Well, not everyone has his code reviewed 😅

[gildor]

yes, I agree, but would be good to see some real use cases when it looks better without braces to support this feature

[louiscad]

All the cases where the single expression in one of the blocks can fit on the line?

[gildor]

Yeah, something like this

[gildor]

interesting actually how it would work, because if and while are different, they have expression in round brackets operator(expression) so parsing is different from try

[louiscad]

`if`/`else` is very similar. when on the other hand is different because the optional braces are for the branches only.

[gildor]

sorry, I mean while, just mistake, fixed my message

[gildor]

if/else and while are similar, both support braces-less syntax