DIP66 has been approved contingent to a few amendments as noted

[Andrei Alexandrescu via Digitalmars-d]

On 12/24/14 4:59 AM, Dicebot wrote:
> On Tuesday, 23 December 2014 at 15:49:46 UTC, Andrei Alexandrescu wrote:
>> Congratulations, Igor! -- Andrei
>
> Good to see that.
>
> It is a big feature though with a notable impact on symbol resolution.
> How about providing it as a separate compiler build for a release or two
> before deploying as part of master?

An emerging pattern (which Walter will effect for dip69) is to initially 
make it opt-in as a flag:

dip -dip69 test.d


Andrei