Can I express this code without having to have the...

# getting-started

[reactormonk]

Can I express this code without having to have the TLV<T> signature, and just use TLV to represent it, if I'm using the interface to designate the type?

sealed interface TLV<T> {
    val value: T
    val type: Byte
}
object TLVNULL: TLV<Unit> {
    override val type: Byte = 0x00
    override val value: Unit = Unit
}
data class TLVNDEF(override val value: NdefMessage): TLV<NdefMessage> {
    override val type: Byte = 0x03
}
data class TLVProp(override val value: ByteArray): TLV<ByteArray> {
    override val type: Byte = 0xFD.toByte()
}
object TLVTerminator: TLV<Unit> {
    override val type: Byte = 0xFE.toByte()
    override val value: Unit = Unit
}

[Youssef Shoaib [MOD]]

Remove the <T> and the val value: T inside the interface. Then, you'll only have access to the value if you know which subclass of TLV you have. I think that leaving it as-is could be a better design though.