Iterators and Ranges: Comparing C++ to D to Rust

[Ola Fosheim Grøstad]

On Monday, 14 June 2021 at 17:49:46 UTC, Ola Fosheim Grøstad 
wrote:
> Then maybe a table pointer would be a pointer to the chunk + a 
> bitmask? But then it makes more sense to use a ranges approach. 
> So you point to first chunk with bitmask and the last chunk 
> with bitmask. So pointing to the end would be pointing to the 
> last chunk with a zero-bitmask? Not sure… :-D

No. I think I cannot have empty ranges to signify the beginning 
or end. Since there might be only one chunk in the container. So 
then there would be an ambiguity as to whether I point to the 
empty space at the beginning or the end.

So probably better to have two types: bitmasked ranges, and 
explicitly indexed table pointers. Perhaps?