Trying to help my friends in the midwest feel comfortable with Rust

midwest.rs

use std::fs::File;

enum ComeWith<T, E> {
    YouBetcha(T),
    Ope(E),
}

impl<T, E> From<std::result::Result<T, E>> for ComeWith<T, E> {
    fn from(r: std::result::Result<T, E>) -> Self {
        match r {
            Ok(v) => ComeWith::YouBetcha(v),
            Err(e) => ComeWith::Ope(e),
        }
    }
}

fn main() {
    //let f = ComeWith::from(File::open("doesnt_exist.txt"));
    let f = ComeWith::from(File::open("meow.txt"));

    let fh = match f {
        ComeWith::YouBetcha(file) => file,
        ComeWith::Ope(error) => panic!("Can't open file: {:?}", error),
    };

    println!("File handle: {:?}", fh);
}