| // Copyright 2015 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(const_fn)] |
| |
| use std::sync::atomic::{Ordering, AtomicUsize}; |
| |
| use std::mem; |
| struct S<U,V> { |
| _u: U, |
| size_of_u: usize, |
| _v: V, |
| size_of_v: usize |
| } |
| |
| impl<U, V> S<U, V> { |
| fn new(u: U, v: V) -> Self { |
| S { |
| _u: u, |
| size_of_u: mem::size_of::<U>(), |
| _v: v, |
| size_of_v: mem::size_of::<V>() |
| } |
| } |
| } |
| |
| static COUNT: AtomicUsize = AtomicUsize::new(0); |
| |
| impl<V, U> Drop for S<U, V> { |
| fn drop(&mut self) { |
| assert_eq!(mem::size_of::<U>(), self.size_of_u); |
| assert_eq!(mem::size_of::<V>(), self.size_of_v); |
| COUNT.store(COUNT.load(Ordering::SeqCst)+1, Ordering::SeqCst); |
| } |
| } |
| |
| fn main() { |
| assert_eq!(COUNT.load(Ordering::SeqCst), 0); |
| { S::new(0u8, 1u16); } |
| assert_eq!(COUNT.load(Ordering::SeqCst), 1); |
| } |