Mixing operations with signed and unsigned types

[Michal Minich]

On Tue, 29 Jun 2010 19:42:45 -0400, bearophile wrote:

> Stewart Gordon:
>> http://d.puremagic.com/issues/show_bug.cgi?id=259
> 
> I have added my vote there a lot of time ago. I think Andrei says that
> fixing this is unworkable, but I don't know why. If you make this an
> error and at the same time turn array indexes/lengths into signed
> values, you don't have that many unsigned values in normal D programs,
> so you need very few casts and it becomes workable.
> 
> Bye,
> bearophile

Why on the earth should array indexes and lengths be signed !!! My brain 
just explodes when I think of something like that.