Hello I have an array of functions that accepts a View argument:

val manyFunctions: ArrayList<(View) -> Unit> = arrayListOf(
    {layout: TextView -> Unit}
)

But that don't work cos

TextView

is not exactly

View

though it subclasses it.

Change

View

to

out View

or

in View

. I don't remember which will work but one should.

Yes, your function does not accept

View

, it only accepts

TextView

. How do you intend to even call these functions? You can't. @Dominaezzz That does not work in a function type (it's not really useful, the parameters are always

in

, the return type is always

out

).

Oh true.

Why can't you call them? Functions are meant to be called.

What argument would you pass?

An instance of a View type

If you had a (theoretical)

{ foo: out Thing -> Unit }

there is no way to call it, since you cannot know what it's actual parameter is.

Ok I think I'm back to the same discussion I had with Shawn yesterday

If you pass on anything that isn't a

TextView

, you'll get a ClassCastException or similar. Given it compiles.

It will only compile with an "unchecked cast" warning

Thanks guys for the clues, I think I know where to go.