Can we enable -preview=rvaluereference now?

[Quirin Schroll]

On Tuesday, 13 August 2024 at 04:23:15 UTC, Manu wrote:
> So this preview has been available for more than 5 years.
> Andrei did a keynote on it, and that seemed generally well 
> received (if not
> a little tepid, because not so many people care about this).
> All the code I've written in the last 5 years doesn't work 
> without this.
> I have exercised this pretty extensively in whatever flavour of 
> code it is
> that I tend to write, and never had any problem. It works like 
> it's meant
> to.
> I would severely struggle to return to a D without it.
>
> Can we un-preview this now?

Can we please remove it? It's a silent breaking change as it 
changes the semantics of every function that has `ref` parameters 
with the implicit or explicit understanding that it can't take 
rvalues. Add `@universal ref`. It's a pure addition and wouldn't 
break code. Manu and others could just search and replace `ref` 
by `@universal ref` and be happy. Changing `ref` to make it take 
rvalues never was a good idea.