use std::fmt::Debug;

fn main() {
    println!("whee: {:?}, {:?}", whee(5u32), whee(6u64));
    println!(
        "mwahaha: {:?}, {:?}",
        mwahaha(true, 5u32, 6u64),
        mwahaha(false, 7u64, 8u32)
    );
}

// I was slightly surprised you can do this:
fn whee(x: impl Debug) -> impl Debug {
    x
}

// But this you can't:
fn mwahaha(p: bool, x: impl Debug, y: impl Debug) -> impl Debug {
    if p {
        x
    } else {
        y
    }
}