[steveklabnik]

It is a reference, yes, and without optimization, is a pointer to a value.

Your parent is suggesting to not think of it in such a low-level way, and instead think of it as a permission. In this case, the pointer being optimized away makes more sense, as it’s not really about it being a pointer.

I’m of two minds about it, to be honest.

[wiggler00m]

Thanks for the book! A++ would read again.

https://www.amazon.com/Rust-Programming-Language-Steve-Klabn...

[steveklabnik]

You're welcome!

[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.