Is it possible to pass `this` as a parameter to an...

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[Dom]

Is it possible to pass this as a parameter to an interface delegate?

interface A

class B(private val c : C) : A

class C : A by B(this)

produces an error saying that "`this` is not defined in this context". Is there a workaround for this?

[Sam Garfinkel]

It is not legal unfortunately. It has to do with the fact that the synthesized code could call the constructor of B with a C that is not fully initialized.

[Sandesh Baliga]

You could instead go for composition, and use by lazy.
Something like
val a : A by lazy { B(this) }

I just decided it as a solution recently. Am I right guys?

[Dom]

Ok, thanks @Sam Garfinkel!

@Sandesh Baliga, unfortunately I have a requirement that C must implement A. Thanks though!

[Hanno]

You could have
interface A<T> { val self:T }
Which would not be "this" ( because one can implement freely) but then you can implement interface and do override val self: B = this