gistfile1.rs

pub trait Protocol {
    type Clean = Self;
}

impl Protocol for usize {
  type Clean = usize;
}

impl Protocol for IdentificationBaseMessage {
  type Clean = IdentificationBaseMessage;
}

macro_rules! messages {
  ($($id:expr => $name:ident { $($message:tt)* })*) => {

    $(proto_struct!{ $name { $($message)* } })*

    pub enum Message {
      $($name($name)),*
    }
  }
}

macro_rules! proto_struct {

    ($name:ident { $($fname:ident: $fty:ty),+ }) => {
        pub struct $name {
            $(pub $fname: <$fty as Protocol>::Clean),*
        }
      }
}

// Sample

messages! {
  3 => HelloConnectMessage { field: usize }
  4 => IdentificationMessage { base: IdentificationBaseMessage  }
  5 => IdentificationBaseMessage { field: usize  }
}



-----------
// Generated code

#![feature(no_std)]
#![no_std]
#[prelude_import]
use std::prelude::v1::*;
#[macro_use]
extern crate "std" as std;
pub trait Protocol {type Clean = Self; }

impl Protocol for usize {type Clean = usize; }

impl Protocol for IdentificationBaseMessage {type
    Clean
    =
    IdentificationBaseMessage;
}





pub struct HelloConnectMessage {
    pub field: <

               usize as Protocol>::Clean,
}
pub struct IdentificationMessage {
    pub base: <IdentificationBaseMessage as Protocol>::Clean,
}
pub struct IdentificationBaseMessage {
    pub field: <usize as Protocol>::Clean,
}
pub enum Message {
    HelloConnectMessage(HelloConnectMessage),
    IdentificationMessage(IdentificationMessage),
    IdentificationBaseMessage(IdentificationBaseMessage),
}