// Copyright 2014 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // pretty-expanded FIXME #23616 #![feature(rustc_private)] extern crate serialize; use std::fmt; use serialize::{Encoder, Encodable}; use serialize::json; struct Foo { v: T, } impl Drop for Foo { fn drop(&mut self) { json::encode(&self.v); } } fn main() { let _ = Foo { v: 10 }; }