A naive attempt at a refcounted class proxy

[Francesco Cattoglio via Digitalmars-d-learn]

On Tuesday, 13 January 2015 at 18:52:25 UTC, ketmar via 
Digitalmars-d-learn wrote:
> On Tue, 13 Jan 2015 18:36:15 +0000
> aldanor via Digitalmars-d-learn 
> <digitalmars-d-learn at puremagic.com>
> wrote:
>
>> On Tuesday, 13 January 2015 at 18:19:42 UTC, ketmar via
>> Digitalmars-d-learn wrote:
>> > and then you can go with structures in the first place, i 
>> > think.
>> > remember that you have that k00l `alias this` trick for them!
>> Which doesn't always help in case of multiple inheritance :( 
>> e.g.
>> the blasted hdf c++ class hierarchy example.
> multiple `alias this` may help here... to some extent. ;-)

Are they even enabled in dmd already? 2.65 still reports the 
"there can only be one alias this" error.