Are you literally me 2 months ago? I was trying to implement the same HashFunction trait as yours and I finally settled with: pub trait HashFunction<const

Are you literally me 2 months ago? I was trying to implement the same HashFunction trait as yours and I finally settled with: pub trait HashFunction<const OUTPUT_SIZE: usize> { fn hash(data: &[u8]) -> [u8; OUTPUT_SIZE]; } I believe this approach has some shortcomings in my case, but it has been a while and I didn't remember anything. Also for the Rust crowd, is it possible to do something like this? pub trait HashFunction<const OUTPUT_SIZE: usize> { // I want Output to always be [u8; OUTPUT_SIZE], but using associated type means // whatever implements HashFunction can redefine Output. type Output; fn hash(data: &[u8]) -> Output; }