detect implicitly convertible typeid's?

[bitwise]

On Tuesday, 26 September 2017 at 19:31:56 UTC, Steven 
Schveighoffer wrote:
> [...]
>
> I just recently fixed Variant so it could accept shared data 
> (so you could pass shared data using std.concurrency), and part 
> of that depends on the fact that I know nothing else can point 
> at the data (so no locking/atomics are necessary, we know the 
> actual data is not shared).
>
> I think it's very dangerous to extract a reference to the data, 
> it breaks all kinds of expectations.
>
> -Steve

Ok - I guess I'll have to make a custom Box of some kind.
Or maybe...even think outside the box ;)

   Thanks