mirror of https://github.com/rust-lang/rust
24 lines
541 B
Rust
24 lines
541 B
Rust
// Test that assignments to an `&mut` pointer which is found in a
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// borrowed (but otherwise non-aliasable) location is illegal.
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struct S<'a> {
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pointer: &'a mut isize
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}
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fn copy_borrowed_ptr<'a>(p: &'a mut S<'a>) -> S<'a> {
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S { pointer: &mut *p.pointer }
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}
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fn main() {
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let mut x = 1;
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{
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let mut y = S { pointer: &mut x };
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let z = copy_borrowed_ptr(&mut y);
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*y.pointer += 1;
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//~^ ERROR cannot use `*y.pointer`
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//~| ERROR cannot assign to `*y.pointer`
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*z.pointer += 1;
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}
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}
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