Shared via Rust Playground

shift_in.rs

#[derive(Debug,PartialEq)]
enum Bitorder {
    LSBFIRST,
    MSBFIRST,
}

fn main() {
    let order: Bitorder = Bitorder::LSBFIRST;
    
    if order == Bitorder::MSBFIRST {
        println!("MSBFIRST");
        let data: u32 = 0b10001111;
        for i in 0..8 {
            match (data >> i) & 1 {
                1 => println!("{} true",  i+1),
                _ => println!("{} false", i+1),
            }
        }
    } else {
        println!("LSBFIRST");
        let data: u32 = 0b10001111;
        for i in (0..8).rev() {
            match (data >> i) & 1 {
                1 => println!("{} true",  i+1),
                _ => println!("{} false", i+1),
            }
        }
    }
}