t

gistfile1.rs

extern crate rustc_serialize;
use rustc_serialize::json;

#[derive(RustcDecodable, RustcEncodable, Debug)]
enum Message {
	Type1(String),
	Type2(u64),
}

fn main() {
    let msg1 = Message::Type1("Hello world".to_string());
    let msg2 = Message::Type2(5);

    // Serialize using `json::encode`
    let encoded = json::encode(&msg1).unwrap();

    // Deserialize using `json::decode`
    let decoded: Message = json::decode(&encoded).unwrap();
    println!("encoded: {}, decoded: {:?}", encoded, decoded);
}