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// 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);
}
}
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