Weird issue with std.range.iota.length

[w0rp via Digitalmars-d]

Maybe I'm missing something, but can't the length just be size_t? 
I doubt there is much you could do with code which generates 
finite sequences larger than the addressable memory space, aside 
from very abstract and inefficient mathematical calculations 
which skip over elements. iota would probably work better with 
size_t in most cases, and if you really well and truly need 
something which generates finite sequences of integers larger 
than the addressable memory space, you can always just write your 
own version.