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  1. extern crate bytes; // 0.4.12
  2. use bytes::BufMut;
  3.  
  4. #[derive(Debug)]
  5. struct Message {
  6.     id: u32,
  7.     body: Body,
  8. }
  9.  
  10. #[derive(Debug)]
  11. enum Body {
  12.     SendMessage { inner: SendMessage },
  13.     ReceiveMessage { inner: ReceiveMessage },
  14. }
  15.  
  16. #[derive(Debug)]
  17. struct ReceiveMessage {
  18.     from: String,
  19.     message: String
  20. }
  21.  
  22. #[derive(Debug)]
  23. struct SendMessage {
  24.     to: String,
  25.     message: String
  26. }
  27.  
  28. fn main() {
  29.     let m = Message {
  30.         id: 1,
  31.         body: Body::SendMessage { inner: SendMessage {
  32.             to: "#rust".to_string(),
  33.             message: "help".to_string(),
  34.         }},
  35.     };
  36.    
  37.     println!("{:#?}", m);
  38.    
  39.     // This seems super awkward, is there a way of not listing each attribute?
  40.     match m.body {
  41.       Body::SendMessage{inner}  => println!("{} please {}", inner.to, inner.message),
  42.       _ => ()
  43.     };
  44.    
  45.     // Is there some way I can get this behaviour? I don't really want to
  46.     // implement IntoBuf for every variant if I can help it?
  47.     let b = bytes::BytesMut::new();
  48.     //b.put(m);
  49. }
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