Rust updates

[bearophile]

Marco Leise:

> Yes, this is the single most important Rust feature to me when 
> typing. I've just had too many cases of mass-casts to ubyte or 
> short where a suffix to the literal would only have cost one or 
> two letters. 255ub = byte, 32000s = short

I am writing a lot of D2 code, but in my code the need of
explicit short or byte literals is very uncommon. That's why
those Rust suffixes seem overkill to me. Do you want to show us
some of your use cases?

Bye,
bearophile