21 lines
482 B
Rust
21 lines
482 B
Rust
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// exec-env:RUST_POISON_ON_FREE=1
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fn borrow(x: &int, f: fn(x: &int)) {
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let before = *x;
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f(x);
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let after = *x;
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assert before == after;
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}
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fn main() {
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let mut x = @{f: ~3};
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borrow(x.f) {|b_x|
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assert *b_x == 3;
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assert ptr::addr_of(*x.f) == ptr::addr_of(*b_x);
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x = @{f: ~4};
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#debug["ptr::addr_of(*b_x) = %x", ptr::addr_of(*b_x) as uint];
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assert *b_x == 3;
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assert ptr::addr_of(*x.f) != ptr::addr_of(*b_x);
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}
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}
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