| // 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 <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(box_syntax)] |
| |
| use std::fmt; |
| |
| struct Number { |
| n: i64 |
| } |
| |
| impl fmt::Display for Number { |
| fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
| write!(f, "{}", self.n) |
| } |
| } |
| |
| struct List { |
| list: Vec<Box<ToString+'static>> } |
| |
| impl List { |
| fn push(&mut self, n: Box<ToString+'static>) { |
| self.list.push(n); |
| } |
| } |
| |
| fn main() { |
| let n: Box<_> = box Number { n: 42 }; |
| let mut l: Box<_> = box List { list: Vec::new() }; |
| l.push(n); |
| let x = n.to_string(); |
| //~^ ERROR: use of moved value: `n` |
| } |