We cannot able to use `try-catch` inside composabl...

# compose

[amar_1995]

We cannot able to use try-catch inside composable function.
I am getting the below error
Try catch is not supported around composable function invocations.

[kioba]

why do you want to throw?

[amar_1995]

Just getting some error and I am trying to printstacktrace.😅

[Michal Bacik]

He doesn't want to throw, but catch ;)

[amar_1995]

Yes

[amar_1995]

I believed that we can able to use every functionality provided by kotlin.

[Luca Nicoletti]

@Michal Bacik he can catch inside the function, without calling nested @Composable inside the try-catch

[Adam Powell]

Thanks to the way Compose can restart further down the tree on recomposition if just one small part of the UI invalidates, the try/catch may not be part of the call stack when the error happens. Any time you call a composable function, think of it being a little bit like a launch {}.

[Adam Powell]

We might wire this up to try to make it do something reasonable but it's not top priority at the moment

[Luca Nicoletti]

I really don’t see the point why you should wrap a @Composable with a try-catch block

[Adam Powell]

No? I'd love to be able to try a block and if anything goes wrong, transactionally roll back some part of it and then emit something else as part of the catch 🙂

[Luca Nicoletti]

Well, you can try-catch inside a composable

[Adam Powell]

Yes but that's not really exceptions, that's more like return value checking at each layer of the call stack

[Adam Powell]

It unfortunately is a hole in our goal that any chunk of compose code is a candidate for refactor/extract method

[Adam Powell]

One that can be worked around, but still