Why aren't

data

and

inner

modifiers to

class

compatible together?

I have never given it much thought, but I'd be interested in knowing your use case for needing both

I need to set up a

TestFixture

class that uses repos in the outer test class to add the fields (entities with relations) to the dbs in the

init

block... if I put the data class inside the test's init block before the tests, it has access to the test class's properties, whereas if I put it after, I have to make it into an inner class, then I can't do :

val (client, order) = TextFixture()

unless I implement my own componentX functions...

inner

classes work by having a extra hidden reference to the outer class, inserted into every constructor, which I suppose could be implemented on a

data

class, but feels very strange

Interesting, thanks for the explanation! I still think it might be useful though... I wonder if anyone would expect those to be equal, though. I think even though i componentX and field list the outer class ref isn't there, it should still not be equal in the end.

makes sense but it's inconsistent with existing behavior

data class Foo(val bar: Int) {
    var extra = 0
}
Foo(0).apply { extra = 1 } == Foo(0).apply { extra = 2 }