`derivedStateOf` doesn't work for `MVIComposable` about flowmvi HOT 2 CLOSED

Hello, I believe that you are trying to solve a problem that does not exist here.
The MVIComposable does not expose State for a reason - we want it to recompose on state changes. I believe that behavior is normal.

Because that composable is only recomposed when the state changes, that's essentially equal to using derivedStateOf, isn't it?

What you probably wanted to do here is create some kind of computed property of a state that would be evaluated when the state is copied or created. In this case, it's far more efficient to make it a property of your MVIState itself, because state creation can be easily offloaded to background threads (unlike derivedStateOf { } computation).

Example:

 data class DisplayingSignInForm(
        val email: Input = empty(),
        val password: Input = empty(),
        val isPasswordVisible: Boolean = false,
    ) : EmailSignInState {
    
        // evaluated every time
        val isInputValid get() = email.isValid && password.isValid
        // evaluated when state is created ✅
        // works because state is immutable
        val isInputValid = email.isValid && password.isValid

Does this solve your problem?

from flowmvi.

Makes sense, sorry for the late reply.

from flowmvi.