// Derive the `fmt::Debug` implementation for `Structure`. `Structure`
// is a structure which contains a single `i32`.
#[derive(Debug)]
struct Structure(i32);
// Put a `Structure` inside of the structure `Deep`. Make it printable
// also.
#[derive(Debug)]
struct Deep(Structure);
fn main() {
// Printing with `{:?}` is similar to with `{}`.
println!("{:?} months in a year.", 12);
println!("{1:?} {0:?} is the {actor:?} name.",
"Slater",
"Christian",
actor="actor's");
// `Structure` is printable!
println!("Now {:?} will print!", Structure(3));
// The problem with `derive` is there is no control over how
// the results look. What if I want this to just show a `7`?
println!("Now {:?} will print!", Deep(Structure(7)));
}