C#5 desiderata

[Robert Jacques]

On Fri, 28 May 2010 19:52:46 -0400, bearophile <bearophileHUGS at lycos.com>  
wrote:
> Simen kjaeraas:
>> Neat. Worthy an @keyword, I think. "@flag enum foo {...}"
>
> It's cute. But Don hates attributes :-) Recently I have created a thread  
> about this, and some one has written a good enough implementation in  
> normal D code, that can be "good enough".

Also, don't forget CTFE makes this simple to roll your own:
enum foo { bar = 1 << 0, bar2 = 1<<1, ... }