<Why can I not delegate to a parameter in a Kotlin...

# stackoverflow

[user]

Why can I not delegate to a parameter in a Kotlin value class?
I can delegate to a contructor parameter in a class
class SerialNumber(val value: String) : CharSequence by value {

init {
require(value.isNotBlank())
}
}

but if I make the class a value class
@JvmInline
value class SerialNumber(val value: String) : CharSequence by value {

init {
require(value.isNotBlank())
}
}

then the compiler says "Value class cannot implement an interface by delegation if expression is not a parameter"
As far as I can see value is a...