How to read a single character from input as u8?

Question

I am currently building a simple interpreter for this language for practice. The only problem left to overcome is reading a single byte as a character from user input. I hav

Answer 1

Reading just a byte and casting it to i32:

use std::io::Read;

let input: Option = std::io::stdin()
    .bytes() 
    .next()
    .and_then(|result| result.ok())
    .map(|byte| byte as i32);

println!("{:?}", input);