@Andreas Sinz using

when

on an instance of

SpecificExceptions

the auto-completion for all branches at least doesn’t work

@damian with all branches you mean

ErrorOne

and

ErrorTwo

?

yes, it’s only giving me

ErrorTwo

as possibility

if you have an instance of

SpecificExcetpions

, it cannot be an instance of

ErrorOne

?

at least thats what the auto-completion of the

when

branches is telling me; also red-underine with “incompatible types”

but its not possible with ordinary classes too?

what do you mean?

ErrorOne

is not a subclass of

SpecificExceptions

, so an instance of

SpecificExceptions

can not be

ErrorOne

yes that is true. that’s why i was thinking / asking if there’s a way to extend sealed classes, or to inherit the collection of classes in a sealed class and add new ones in another class

Extending sealed classes is not possible, because that would make sealed classes useless

hmm. i’ll see if i can make it work for my use-case. thanks