Operator overhaul

[bearophile]

Andrei Alexandrescu:
> There would be composition (of the kind usually addressed through 
> expression templates), but we don't have a good solution to that yet.

You really want to make D an awesome language :-)

I though that in D the expression templates stuff was left to be done by the AST macros, but if they don't come until D3, then a more specialized functionality may be used in the meantime... (if necessary even to be later removed in D3).

Bye,
bearophile