//! obj/src/types.rs --- OBJ type descriptions used by our demo

 use crate::{Error, Result, Objective, Serialize, Deserialize};

 /// APPLICATION TYPES

 #[derive(Serialize, Deserialize)]

 pub enum Service {

   Nws,

   Fin,

   Pvp,

 }

 impl Objective for Service {}

 #[derive(Serialize, Deserialize)]

 pub struct Complex<X: Objective> {

   data: X,

   state: Vec<u8>,

 }

 impl Objective for Complex<Service> {}

 pub fn generate_complex() -> Result<Complex<Service>> {

   Ok(Complex::<Service>::from_json_str("hi")?)

 }