Maybe the question is not well written, but it’s because I do not really know what’s happening in here. I’m learning Rust, I’m doing pretty good, but this is the second time that stomp with this.

First, I thought that only the Add trait would be enough, but the LSP keep saying me this if I do not add the “restriction”, as far as I know.

What I do not get is what <Output = T> is. I know that is using the type T, but why it is assigned to Output?

The first time that I saw something similar was in the Rust book that comes with rustup, just look at the next function signature

Thank you for you help, you are awesome.