Hello. Can any1 help me find out what is the issue...

# compose

[myanmarking]

Hello. Can any1 help me find out what is the issue in this code

[myanmarking]

sealed class PrepareDevices {
    val canEditConfig: Boolean = this !is Connecting
    val canEditConfig2: Boolean = this != Connecting

    object Initial: PrepareDevices()
    object Connecting: PrepareDevices()
    object Connected: PrepareDevices()
}

class TestSingleton{

    @Test
    fun test(){
        val value = PrepareDevices.Initial
        Assert.assertTrue(value.canEditConfig)
    }

    @Test
    fun test2(){
        val value = PrepareDevices.Connecting
        Assert.assertTrue(value.canEditConfig.not())
    }

    @Test
    fun test3(){
        val value = PrepareDevices.Initial
        Assert.assertTrue(value.canEditConfig2)
    }

    @Test
    fun test4(){
        val value = PrepareDevices.Connecting
        Assert.assertTrue(value.canEditConfig2.not())
    }
}

Why does test4 fail. It doesnt make sense to me

[Vilgot Fredenberg]

Use data object

[ephemient]

you're attempting to reference the Connecting instance before it has been initialized

[ephemient]

https://youtrack.jetbrains.com/issue/KT-67222/Kotlin-object-is-null-incorrect-static-initialization

[ephemient]

not a data issue, nor Compose related

[Zach Klippenstein (he/him) [MOD]]

Those properties should be computed, no reason to allocate fields for them and that would probably fix this issue too since they’d be lazy.

[ephemient]

^^ that, or as a constructor param

sealed class PrepareDevices(
    val canEditConfig: Boolean,
) {
    object Initial: PrepareDevices(
        canEditConfig = true,
    )
    object Connecting: PrepareDevices(
        canEditConfig = false,
    )
    object Connected: PrepareDevices(
        canEditConfig = true,
    )
}

or as overrides

sealed class PrepareDevices {
    abstract val canEditConfig: Boolean

    object Initial: PrepareDevices {
        override val canEditConfig: Boolean
            get() = true
    }
    object Connecting: PrepareDevices {
        override val canEditConfig: Boolean
            get() = false
    }
    object Connected: PrepareDevices {
        override val canEditConfig: Boolean
            get() = true
    }
}