| // Copyright 2012-2014 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. |
| |
| // Ensures that destructors are run for expressions of the form "e;" where |
| // `e` is a type which requires a destructor. |
| |
| |
| #![allow(path_statement)] |
| |
| struct A { n: isize } |
| struct B; |
| |
| static mut NUM_DROPS: usize = 0; |
| |
| impl Drop for A { |
| fn drop(&mut self) { |
| unsafe { NUM_DROPS += 1; } |
| } |
| } |
| |
| impl Drop for B { |
| fn drop(&mut self) { |
| unsafe { NUM_DROPS += 1; } |
| } |
| } |
| |
| fn main() { |
| assert_eq!(unsafe { NUM_DROPS }, 0); |
| { let _a = A { n: 1 }; } |
| assert_eq!(unsafe { NUM_DROPS }, 1); |
| { A { n: 3 }; } |
| assert_eq!(unsafe { NUM_DROPS }, 2); |
| |
| { let _b = B; } |
| assert_eq!(unsafe { NUM_DROPS }, 3); |
| { B; } |
| assert_eq!(unsafe { NUM_DROPS }, 4); |
| } |
