Rust script defining function that can write either to Terminal or a file

write_to.rs

use std::fs::File;
use std::io::{self, Write};

#[derive(Debug)]
pub enum Destination<'a> {
    Terminal,
    File(&'a std::fs::File),
}
fn main() {
    print_report(Destination::Terminal).expect("Error printing report to terminal");
    let file = File::create("report.txt").expect("Error creating file");
    print_report(Destination::File(&file)).expect("Error printing report to file");
}

fn print_report(dest: Destination) -> std::io::Result<()> {
    write_to(&dest, "Report Title".to_string())?;
    write_to(&dest, "Line 2 of report".to_string())?;

    Ok(())
}

fn write_to(dest: &Destination, output: String) -> std::io::Result<()> {
    match dest {
        Destination::File(mut f) => {
            writeln!(f, "{}", &output)?;
            Ok(())
        }
        Destination::Terminal => {
            // println!("{}", &output);
            let stdout = io::stdout(); // get the global stdout entity
            let mut handle = stdout.lock(); // acquire a lock on it
            writeln!(handle, "{}", output)?; // add `?` if you care about errors here
            Ok(())
        }
    }
}