How to cast a byte array to a primitive type in Rust?

Question

How would I cast a byte array to a primitive type in Rust?

let barry = [0, 0];
let shorty: u16 = barry;

I have already tried let shorty: u16 = barry as u16; but that didn't work due to a "non scalar cast".

Answer 1

You can use bitwise operations. Note that this depends on endianess.

fn main() {
   let barry = [0, 0];
   let shorty: u16 = barry[0] | (barry[1] << 8);
   println!("{0}", shorty);
}