Code shared from the Rust Playground

playground.rs

use std::marker::PhantomData;

struct Intermediate<T> {
    marker: PhantomData<T>
}

struct Start {}

struct Baseline {}
trait HasBaseline{}
impl HasBaseline for Baseline {}

struct PNet<T> where T: HasBaseline {
    marker: PhantomData<T>
}

impl<T: HasBaseline> HasBaseline for PNet<T> {}

struct PAvailable<T> where T: HasBaseline {
    marker: PhantomData<T>
}

impl<T: HasBaseline> HasBaseline for PAvailable<T> {}

impl Intermediate<Start> {
  fn add_baseline(self) -> Intermediate<Baseline> {
      Intermediate {
          marker: PhantomData
      }
  }
}

impl<T> Intermediate<T> where T: HasBaseline {
    fn add_p_net(self) -> Intermediate<PNet<T>> {
        Intermediate { marker: PhantomData }
    }
    
    fn add_p_available(self) -> Intermediate<PAvailable<T>> {
        Intermediate { marker: PhantomData }
    }
}

fn main() {
    let i: Intermediate<Start> = Intermediate {
        marker: PhantomData
    };
    
    i.add_baseline()
    .add_p_net()
    .add_p_available()
    .add_p_net(); // We can use it again!!!!
    
}