problem with size_t and an easy solution

[Dominikus Dittes Scherkl via Digitalmars-d]

On Monday, 8 December 2014 at 08:46:49 UTC, bearophile wrote:
> Freddy:
>
>> Why not keep size_t implictly convertable but disallow it for
>> usize.
>
> This is an interesting idea. (But the name "uword" seems 
> better).
YES.
And I want a signed variant of this (instead of the ugly 
ptrdiff_t):
I want to wield my sword!