how to do this meta-programming? print the address of random element's address of a variable length of arrays?

[mw]

On Saturday, 12 September 2020 at 19:06:47 UTC, Paul Backus wrote:
> On Saturday, 12 September 2020 at 18:16:51 UTC, mw wrote:
>> Now, let me expand this challenge: suppose we need to add a 
>> new set of variable length extra parameters in parallel to the 
>> arrays, i.e:
>>
>> [...]
>>
>> Now the question is how to pass & handle 2 sets of variadic 
>> parameters?
>
>     alias firstSet = args[0 .. $/2];
>     alias secondSet = args[$/2 .. $];

This solution assumes the two sets are of equal size; what if we 
don't have such assumption? i.e. we only know the two sets 
divided into two logical groups.

I've tried something like this: the AliasSeq specify the logical 
divide

    printRandomElemAddr(AliasSeq!(extraA, extraB, extraC, extraD), 
a, b, c);

but cannot make it work.

(I'm asking for a more general solution, e.g. what if we have 3, 
or N sets of variadic parameters?)


Looks like we can only pass 1 variadic parameters, then the 
question is what's the best way to divide it?

Is there any special marker (variable or type?) can be used to 
divide? and what's the staticSplit?