```open class A( open val a: Int, val b: String = "Something" ) data class B( override ...

# compose

[chansek]

open class A(
    open val a: Int,
    val b: String = "Something"
)

data class B(
    override val a: Int = 20,
    val c: Int = 30
) : A(a)

I have a composable which is dependant upon class B.

@Composable
fun BCard(b: B) {
    // Compose something
}

BCard recomposes when a nad c are changed, but not when b is changed. How can I solve this?

[mattinger]

I'm not sure i get what you are asking here. Your composable depends on an instance of B, so if that's a state value, the card will recompose when you re-assign it:

val b = remember { mutableStateOf(B()) }

BCard(b)

and then at some later point in an onClick callback or something:

b.value = b.value.copy(a = 50)

That should trigger recomposition of your card.