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

[Adam D. Ruppe via Digitalmars-d]

On Thursday, 31 March 2016 at 20:39:36 UTC, Steven Schveighoffer 
wrote:
> But how do you add a key to the set? Currently only allowed via:
>
> a[x] = ...;

Oh yeah... when I use a built in AA as a set now, I either set it 
to true or to itself:

string[string] lameSet;

lameSet[a] = a;

lameSet.remove(a);

so i guess one of those could happen