Code shared from the Rust Playground

playground.rs

trait ChainDebug {
    fn debug(self) -> Self
    where
        Self: Sized + std::fmt::Debug,
    {
        dbg!(self)
    }
}

impl ChainDebug for X {}
impl ChainDebug for Y {}
impl ChainDebug for Z {}

#[derive(Debug)]
struct X {}
impl X {
    fn start() -> X {
        X {}
    }
    fn hoge(self) -> Y {
        Y {}
    }
}
#[derive(Debug)]
struct Y {}
impl Y {
    fn fuga(self) -> Z {
        Z {}
    }
}
#[derive(Debug)]
struct Z {}
impl Z {
    fn piyo(self) -> i32 {
        10
    }
}

fn main() {
    let v = X::start().debug().hoge().debug().fuga().debug().piyo();
    println!("{}", v);
}