You can make `value` abstract field instead of constructor p

Question

You can make `value` abstract field instead of constructor property it s more flexible and less typing

Rok Koncina · Answer

Android Studio is complaining that it can t be abstract my guess is it doesn t work with sealed classes

gildor · Answer

It works just make sealed class abstract and move property to body

Shawn · Answer

no it s because the val is being declafred in the ctor

Shawn · Answer

Sealed classes are already abstract

Shawn · Answer

move the val out of the constructor and into the body you ll be all good

Rok Koncina · Answer

you re right

streetsofboston · Answer

Rok Koncina · Answer

Yup this is much better Thanks guys I still wish I didn t have to override it every time but ok

streetsofboston · Answer

Are you ever using `value` of a `BaseStatus` s as is not cast to one of its sub types

gildor · Answer

But how would it work if you do not override it This solution allows you override it as constructor property or just as member property including property with custom getter so very flexible

Rok Koncina · Answer

Yes I m using the value on some places without casting it I could have it in a when but they all use the exact same value it looks funny slightly smiling face

Rok Koncina · Answer

I know it s pretty much impossible for it to work without specifying it in a subclass constructor but I was hoping Kotlin magic would provide something like ``` sealed class A val value1 Type1 data class B val value2 Type2 A ``` and I could then initialise it with ``` val b = B Type2 Type1 ``` I know this might be logically impossible but hey magic is magic wink

gildor · Answer

Yes and this is implicit magic already against general ideology of Kotlin that also changes how inheritance work in the language for one specific case

Rok Koncina · Answer

Exactly slightly smiling face And it s not such a specific case most of the time when you re creating a subclass you want to add some more constructor parameters and you have to specify the same parameter s of the superclass and pass them through It s a boilerplate code and Kotlin is so amazing at cleaning all the boilers that it spoiled me whenever I write some boilerplate code in Kotlin my first though is There s probably some Kotlin trick that I don t know yet that cleans this Well not in this case I guess no complaints heart Kotlin