Should out/ref parameters require the caller to specify out/ref like in C#?

[Ola Fosheim Grøstad via Digitalmars-d]

On Monday, 29 May 2017 at 07:51:13 UTC, Jonathan M Davis wrote:
> I expect that we're going to see a DIP related to rvalue 
> references at some point here, because some of the folks 
> (particularly the game folks) think that it's critical to be 
> able to have a function that doesn't care whether it's taking a 
> value by value or by ref - just that it takes it efficiently, 
> and they don't want to be forced to use auto ref to do it 
> (since that requires templates).

So it would use ref or value depending on the target platform? I 
guess that could make sense since some platforms allow vector 
registers as parameters, but it sounds more like an 
implementation detail?

Or did you mean something else?