Someone know why `freeze()` isn't part of the stdlib-common? Would be useful in multiplatform common...

# multiplatform

[Sylvain Patenaude]

Someone know why freeze() isn't part of the stdlib-common?
Would be useful in multiplatform common code.

[mbonnin]

freeze() is a no-op on JVM/JS so I guess this is why. It's pretty easy to do your own version though

[mbonnin]

You can use https://github.com/touchlab/Stately if you want to have an implementation

[Sylvain Patenaude]

Thanks for the link @mbonnin!

I had some multiplatform code with kotlin 1.3 that used a bunch of @SharedImmutable annotations on some `val`s in data classes and enum classes, but it seems it doesn't work anymore with kotlin >= 1.4. I needed those annotations for the iOS clients of my library as the data returned is transfering across other threads.

Is calling .freeze() at a few strategic places the way to go or is there a more "standard" way to replace these @SharedImmutable?

[mbonnin]

TBH at this point, I'd start looking into Kotlin 1.6 and the new memory model

[mbonnin]

All the freeze() is going away

[mbonnin]

Unless this is code you in in production right now in which case I don't know

[mbonnin]

Maybe you can refactor your code to have @SharedImmutable as top level properties instead of data classes properties

[mbonnin]

Or calling .freeze() in the "appropriate" place would work too

[Sylvain Patenaude]

I think "long term" your suggestion makes a lot of sense. However, yes this is code already in production, so I'm a bit reluctant (to use 1.6). Also, I don't have much time right now, so I think I will bite the bullet and use a .freeze() multiplatform implementation for now.

I don't understand why @SharedImmutable doesn't work anymore though. It doesn't seem documented anywhere.