44 lines
1.1 KiB
Rust
44 lines
1.1 KiB
Rust
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// Copyright 2018 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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// Test that we are able to reinitilize box with moved referent
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#![feature(nll)]
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static mut ORDER: [usize; 3] = [0, 0, 0];
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static mut INDEX: usize = 0;
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struct Dropee (usize);
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impl Drop for Dropee {
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fn drop(&mut self) {
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unsafe {
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ORDER[INDEX] = self.0;
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INDEX = INDEX + 1;
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}
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}
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}
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fn add_sentintel() {
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unsafe {
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ORDER[INDEX] = 2;
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INDEX = INDEX + 1;
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}
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}
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fn main() {
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let mut x = Box::new(Dropee(1));
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*x; // move out from `*x`
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add_sentintel();
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*x = Dropee(3); // re-initialize `*x`
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{x}; // drop value
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unsafe {
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assert_eq!(ORDER, [1, 2, 3]);
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}
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}
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