// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. #![allow(unknown_features)] #![feature(box_syntax)] struct DroppableStruct; enum DroppableEnum { DroppableVariant1, DroppableVariant2 } static mut DROPPED: bool = false; impl Drop for DroppableStruct { fn drop(&mut self) { unsafe { DROPPED = true; } } } impl Drop for DroppableEnum { fn drop(&mut self) { unsafe { DROPPED = true; } } } trait MyTrait { fn dummy(&self) { } } impl MyTrait for Box {} impl MyTrait for Box {} struct Whatever { w: Box } impl Whatever { fn new(w: Box) -> Whatever { Whatever { w: w } } } fn main() { { let f = box DroppableStruct; let _a = Whatever::new(box f as Box); } assert!(unsafe { DROPPED }); unsafe { DROPPED = false; } { let f = box DroppableEnum::DroppableVariant1; let _a = Whatever::new(box f as Box); } assert!(unsafe { DROPPED }); }