[Proposal] Weak reference implementation for D

[Michael]

On Sunday, 13 October 2013 at 18:11:38 UTC, Andrei Alexandrescu 
wrote:
> On 10/13/13 11:07 AM, Michael wrote:
>> And line 61: what exactly mean a two !! in alive property?
>
> "Convert this to bool".
>
> Andrei

Thanks)