Could we reserve void[T] for builtin set of T ?

[tsbockman via Digitalmars-d]

On Thursday, 31 March 2016 at 21:09:30 UTC, Ali Çehreli wrote:
> Expanding on Walter's idea:
>
>   a[x] = shared(void);    // add
>   a[x] = void;            // remove
>
> Ali
> "ducks and runs for cover" :)

And shared(void)[T] declares an add-only set, right?