> If you've ever implemented C++ iterators, you'll be pleasantly surprised at how elegant it is in Rust by comparison

You probably already know this, but if you're willing to take a dependency on Boost.Iterator, then boost::iterator_facade[1] makes it much easier and less error-prone to implement a standards-conforming iterator, and the pre-built iterator adapters[2] cover lots of common cases, so you don't need to directly implement an iterator at all.

Not arguing the relative merits of C++ vs. Rust, just leaving a pointer here for anyone who didn't know about it.

[1] https://www.boost.org/doc/libs/1_66_0/libs/iterator/doc/iter...

[2] https://www.boost.org/doc/libs/1_66_0/libs/iterator/doc/inde...