Normalize void

[Yuxuan Shui]

On Tuesday, 10 July 2018 at 11:37:25 UTC, ag0aep6g wrote:
> On 07/10/2018 11:56 AM, Yuxuan Shui wrote:
>> Possible alternatives:
>> 
>> * struct Void {}. Takes 1 byte, not as ideal
>> * alias Void = AliasSeq!(). Doesn't work as template argument. 
>> i.e.
>>        SomeTemplate!Void; // actually become SomeTemplate!()
>
> What about `void[0]`? It's a proper type. You can declare a 
> field with it. Size is 0.

Nice!