#![allow(unused_imports)]
#![feature(rustc_private)]
+extern crate rustc_macros;
extern crate rustc_serialize;
-use rustc_serialize::{Encodable, Decodable};
+use rustc_macros::{Decodable, Encodable};
use rustc_serialize::json;
+use rustc_serialize::{Decodable, Encodable};
-#[derive(RustcEncodable, RustcDecodable, PartialEq, Debug)]
+#[derive(Encodable, Decodable, PartialEq, Debug)]
struct UnitLikeStruct;
pub fn main() {