// Copyright 2013 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // run-pass #![allow(non_upper_case_globals)] static mut drop_count: usize = 0; struct Foo { dropped: bool } impl Drop for Foo { fn drop(&mut self) { // Test to make sure we haven't dropped already assert!(!self.dropped); self.dropped = true; // And record the fact that we dropped for verification later unsafe { drop_count += 1; } } } pub fn main() { // An `if true { expr }` statement should compile the same as `{ expr }`. if true { let _a = Foo{ dropped: false }; } // Check that we dropped already (as expected from a `{ expr }`). unsafe { assert_eq!(drop_count, 1); } // An `if false {} else { expr }` statement should compile the same as `{ expr }`. if false { panic!(); } else { let _a = Foo{ dropped: false }; } // Check that we dropped already (as expected from a `{ expr }`). unsafe { assert_eq!(drop_count, 2); } }