27 lines
785 B
Rust
27 lines
785 B
Rust
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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struct Wrapper<'a, T: ?Sized>(&'a mut i32, T);
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impl<'a, T: ?Sized> Drop for Wrapper<'a, T> {
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fn drop(&mut self) {
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*self.0 = 432;
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}
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}
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fn main() {
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let mut x = 0;
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{
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let wrapper = Box::new(Wrapper(&mut x, 123));
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let _: Box<Wrapper<Send>> = wrapper;
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}
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assert_eq!(432, x)
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}
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