Another Transitive const solution

[Steven Schveighoffer]

"Hans W. Uhlig" wrote
> I would disagree with this specifically in relation to const, enum and the 
> current peices here as once the state of this entire concurrent 
> programming underpinnings are complete I would both hope and assume the 
> standard libraries would embrace them and become threadsafe, happy and 
> productive(unless we are going to have two libraries, std and stdconst.

Note that pure functions, which are the only thing that allows automatic 
concurrency (thread safety can be had now in D1), is not planned AFAIK until 
D3.

D2 only brings us const as a tool for developers, not for thread safety.

-Steve