Purity (D2 standard libraries / object.d)

[Walter Bright]

Jason House wrote:
> I chose nearly dead keywords for a reason ;) If I got Walter to think
> about how to implement "pure" memoizers for an extra half hour, I
> will consider myself highly successful. I must leave the fishing
> discussion up to the two of you in a coffee shop! (I'd love to sit in
> and participate with that discussion, but online forums make the
> conversation far too difficult)

Coffee shop discussions are certainly the best.