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[Craig Black]

> I've considered this as well.  In fact, I've got library code to do this 
> for C++.  But I'd prefer something a bit more forward-looking for D (see 
> Herb Sutter's Concur project for one possibility).  I'm planning to 
> address this need at some point in Ares, probably in a manner similar to 
> the Concur design, but I don't have time at the moment.

I don't see syntax this high-level to be implementable in a library.  It 
seems like this would require features to be added to the language core.  Or 
do you disagree?

-Craig