| // Copyright 2012 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 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![feature(managed_boxes)] |
| #![allow(dead_assignment)] |
| #![allow(unused_variable)] |
| |
| use std::gc::{Gc, GC}; |
| |
| enum option<T> { some(Gc<T>), none, } |
| |
| pub fn main() { |
| let mut a: option<int> = some::<int>(box(GC) 10); |
| a = none::<int>; |
| } |
