Allow empty field function arguments for default?

[bearophile]

ixid:

> fun( , 4, ); //Modifies b
> fun( , , 5); //Modifies c
>
> for when you want to call fun with other fields not being 
> default? This would seem more flexible and pretty clear what is 
> intended.

I think that for the programmer's eye it's easy to miss one or 
more of those commas, when reading code. So to me something like 
this seems significantly less bug-prone:

fun(void, 4, void); // Modifies b
fun(void, void, 5); // Modifies c

Bye,
bearophile