Comparing two AliasSeq

[Yuxuan Shui via Digitalmars-d-learn]

On Saturday, 25 March 2017 at 05:20:44 UTC, Jonathan M Davis 
wrote:
> On Saturday, March 25, 2017 04:57:26 Yuxuan Shui via 
> Digitalmars-d-learn wrote:
>> [...]
>
> An AliasSeq isn't really ever a type. AliasSeq!(int, float) is 
> a list of types, not a type itself, and is expressions supports 
> comparing those in at least some instances, because is 
> expressions operate on types, and having them support a list of 
> types is useful. Calling AliasSeq!(int, float) a type would be 
> like claiming that the (int, float) in foo!(int, float) a type. 
> It's a list - a list of template arguments in this case - but 
> it's still a list and not itself a type.
>
> [...]

Because I want to make use of the "static foreach unrolling" 
feature (I don't know what's the official name).

>
> [...]