And the compiler knows exactly how many child clas...

# announcements

[edwardwongtl]

And the compiler knows exactly how many child class it has

[Benoît]

How can that be helpful ?

[menegatti]

when cases. By knowing what are the possible children of a class, you can be sure that the when will be comprehensive

[menegatti]

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

[menegatti]

it is mentioned at the bottom of the documentation

[edwardwongtl]

Exactly, it helps the compiler to warn you that you havn't handle all possible cases

[Benoît]

Cheers guys

[aidanvii]

It’s useful when you wan’t enum-like behaviour, where some ‘values’ (child classes in the case of sealed classes) may have state, some may not have state and can be defined as object singletons, similar to standard enums.

[edwardwongtl]

I would say selaed class is a more powerful version of Enum