extern crate serde;
#[macro_use]
extern crate serde_derive;
extern crate serde_json;

use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
struct Msg {
    info: String,
}

fn main() {
    let _response: Msg = send_msg(&Msg {
        info: "blabla".to_string(),
    });
}

//fn send_msg<T, R>(msg: &T) -> R where T: Serialize, R: Deserialize<'static> {
fn send_msg<T,R>(msg :&T) -> R where T: Serialize, for<'d: 'static> R: Deserialize<'d> {
    tx(&serde_json::to_string(msg).unwrap());
    serde_json::from_str(&rx()).unwrap()
}

fn tx(msg: &str) {
    println!("{}", msg);
}

fn rx() -> String {
    r#"{"info": "response"}"#.to_string()
}