#![allow(unused_variables)]
#![allow(unused_must_use)]
fn main() {
    use std::fmt;
    use std::io::{self, Write};
    let mut some_writer = io::stdout();
    write!(& mut some_writer, "{}", format_args!("print with a {}", "macro"));
    fn my_fmt_fn(args: fmt::Arguments<'_>) {
        write!(& mut io::stdout(), "{args}");
    }
    my_fmt_fn(format_args!(", or a {} too", "function"));
}