module main

struct Particle {
    name string
}

struct ParticleSystem {
    name     string
    particle &Particle
}

struct Ship {
    name            string
    particle_system &ParticleSystem
}

fn test_main() {
    ship := &Ship{
        name:            'ship'
        particle_system: &ParticleSystem{
            name:     'thrust'
            particle: &Particle{
                name: 'thrust_particle'
            }
        }
    }

    ship_clone := &Ship{
        ...ship
    }
    assert ship_clone.particle_system.particle == ship.particle_system.particle
}