| // 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. |
| |
| |
| use std::mem; |
| |
| static mut DROP_COUNT: usize = 0; |
| |
| struct Fragment; |
| |
| impl Drop for Fragment { |
| fn drop(&mut self) { |
| unsafe { |
| DROP_COUNT += 1; |
| } |
| } |
| } |
| |
| fn main() { |
| { |
| let mut fragments = vec![Fragment, Fragment, Fragment]; |
| let _new_fragments: Vec<Fragment> = mem::replace(&mut fragments, vec![]) |
| .into_iter() |
| .skip_while(|_fragment| { |
| true |
| }).collect(); |
| } |
| unsafe { |
| assert_eq!(DROP_COUNT, 3); |
| } |
| } |