I'm trying to figure out why multiple `vararg` par...

# getting-started

[Florian]

I'm trying to figure out why multiple vararg parameters are not allowed even if they have different types

[Luca Nicoletti]

vararg must be the last parameter, so, having 2 of them is not possible as only the latter would really be the last one

[Florian]

well you can have a parameter after it if you use the named argument syntax

[Luca Nicoletti]

Only when calling the function

[Luca Nicoletti]

But you can’t declare a function having 2 varargs

[Florian]

right, but I am wondering why that is

[Florian]

Maybe I am missing something

[Florian]

I understand why its necessary when both varargs have the same type or one is a supertype

[Florian]

but I could pass 1, 2, 3, "bla", "blubb" to a function with an Int and a String vararg

[Ruckus]

Because "different types" doesn't mean much.
For example:

interface A
interface B
class AI : A
class BI : B
class AB : A, B
fun x(vararg a: A, vararg b: B) { ... }
x(AI(), AB(), BI())

Where is the division line?

That's a simple example. It can get far more complicated, and that's even without taking things like generics into account.

[Florian]

sure but couldn't it still be supported for types where it doesn't lead to ambiguity?

[Florian]

just a theoretical question

[Ruckus]

Not in a way that wouldn't lead to all sorts of confusion and edge cases.

[Florian]

I see, thanks