Only if Rust did not have so much symbol soup... :/ It is a bit too much for me, personally. If you are accustomed to it, it is probably not a big deal for you anymore, but for someone who does not know Rust as well, it could be a deal-breaker, which is why I would still rather prefer reference implementations in C, not Rust. Do not hide things from me!

To be honest the few rust formatting options are easier to remember and more logical than the printf placeholders, e.g. ? for debugging, x for hex, X for upper case hex etc.