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https://github.com/rust-lang/rust
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35 lines
671 B
Rust
35 lines
671 B
Rust
// run-pass
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#![allow(unused_must_use)]
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// Test that we are able to reinitialize box with moved referent
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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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