check instance of nested variadic template

[Basile B. via Digitalmars-d-learn]

On Friday, 4 November 2016 at 17:37:10 UTC, Basile B. wrote:
> On Friday, 4 November 2016 at 15:50:36 UTC, Gianni Pisetta 
> wrote:
>> Hi all,
>> I am having issues finding a solution for this, i want to 
>> check if an alias is an istance of a variadic template nested 
>> in another variadic template.
>> [...]
>> there is some sort of workaround?
>>
>> Thanks,
>> Gianni
>
> Hello, I'm not sure that's exactly what you want but check this:
>
> ============================
> [...]
> ============================

A better generic solution:

https://github.com/BBasile/iz/blob/1a6452b376a3a1977c8287f9ef294d2dde76952d/import/iz/types.d#L398