[cormacrelf]

If you had a Range<BigNum> then it would make a lot of sense. I can’t remember if Range<T>’s constraints on T would support that, though.

[eridius]

AFAIK the only constraint on `Range::contains` is that the `Idx` type conforms to `PartialOrd`. So you could in fact have a `Range<String>` if you so desired.