Druntime AA interface could be enhanced a bit

[Michael Rynn]

On Fri, 09 Apr 2010 12:08:54 -0700, Walter Bright wrote:

> Michael Rynn wrote:
>> In playing around trying to understand and make a better AA, I have
>> updated again the dsource/projects/aa/trunk/druntime/aaA.d, this time
>> to be a single linked list version.
> 
> I don't understand, the latest release already changed aaA.d to use a
> singly linked list.

Well, well, this is the power of synchronicity.  After I picked up my jaw 
and eyeballs from the floor, I checked out the latest. 

The new aaA.d is good, but I think I can do better.
I am still testing out some ideas, and still learning, so I will post an 
update to bugzilla after my brain reset.