mirror of https://github.com/rust-lang/rust
24 lines
508 B
Rust
24 lines
508 B
Rust
//@ run-pass
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use std::mem::swap;
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pub fn main() {
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let mut x = 4;
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for i in 0_usize..3 {
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// ensure that the borrow in this alt
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// does not interfere with the swap
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// below. note that it would it you
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// naively borrowed &x for the lifetime
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// of the variable x, as we once did
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match i {
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i => {
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let y = &x;
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assert!(i < *y);
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}
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}
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let mut y = 4;
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swap(&mut y, &mut x);
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}
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}
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