[dathinab]

No the author misrepresents the facts.

If you index a slice with a out of bounds index it will panic independent of weather the index is a usize or a Range<usize>.

If you use `get` with a out of bound index you always get a None.

Sure it's open for discussion if why a range with start > end should be treated the same as an out of bounds index or if it should be treated as empty slice. But then doing the former makes it easier to catch errors.

Enforcing start <= end would mean that the range construction is fallible which would be a major usability nightmare and now you would need two synatxes one for the normally error handling and one for panicking or you would need to add a lot of unwraps or similar.

Range's are mainly used ad-hoc (e.g. `slice[start..=mid+2]`) or `for x in x..y {...}` and are optimized for that usage patterns.

For other usages they might not be optimal. But you can always do your own types.