#![allow(dead_code)] // This test is only here so that we can ensure it compiles. #[macro_use] extern crate rocket; use rocket::{Request, State}; use rocket::response::{Responder, Result}; struct SomeState; pub struct CustomResponder<'r, R> { responder: R, state: &'r SomeState, } impl<'r, 'o: 'r, R: Responder<'r, 'o>> Responder<'r, 'o> for CustomResponder<'r, R> { fn respond_to(self, req: &'r Request<'_>) -> Result<'o> { self.responder.respond_to(req) } } #[get("/unit_state")] fn unit_state(state: State) -> CustomResponder<()> { CustomResponder { responder: (), state: state.inner() } } #[get("/string_state")] fn string_state(state: State) -> CustomResponder { CustomResponder { responder: "".to_string(), state: state.inner() } }