Hello. If someone has some idea : <https://stackov...

# announcements

[ylemoigne]

Hello. If someone has some idea : https://stackoverflow.com/questions/47807755/searching-a-workaround-for-kotlin-empty-data-class-primary-constructor

[Andreas Sinz]

all you want is FooEvent to be a data class and have an empty constructor?

[ylemoigne]

Yes...

[lovis]

...but why do you want a data class without data? 🤔

[ylemoigne]

Because there is data (inherited)

[lovis]

ah ok, sorry should've read the stackoverflow question 😅

[ylemoigne]

lol, it's ok.

[Andreas Sinz]

@ylemoigne the inherited data is NOT used for `copy`/`componentN`/`equals`

[Andreas Sinz]

only properties inside the primary constructor of the data class

[Andreas Sinz]

so overriding inside FooEvent is your best bet

[ylemoigne]

Ho ! I Missed that....

[ylemoigne]

Thanks. Is there a doc explaining how inheritance of data class works ?

[ylemoigne]

https://kotlinlang.org/docs/reference/data-classes.html

[ylemoigne]

Ok, well thanks again.

[Andreas Sinz]

The documentation contains the sentence "The compiler automatically derives the following members from all properties declared in the primary constructor:"