'int' is enough for 'length' to migrate code from x86 to x64

[Andrei Alexandrescu via Digitalmars-d]

On 11/24/14 4:54 AM, Don wrote:
> In D,  1u - 2u > 0u. This is defined behaviour, not an overflow.

I think I get what you mean, but overflow is also defined behavior (in D 
at least). -- Andrei