23 lines
426 B
Rust
23 lines
426 B
Rust
#![feature(box_syntax)]
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struct Foo {
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x: isize
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}
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impl Drop for Foo {
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fn drop(&mut self) {
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println!("drop {}", self.x);
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}
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}
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fn main() {
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let mut ptr: Box<_> = box Foo { x: 0 };
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let mut test = |foo: &Foo| {
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println!("access {}", foo.x);
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ptr = box Foo { x: ptr.x + 1 };
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println!("access {}", foo.x);
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};
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test(&*ptr);
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//~^ ERROR: cannot borrow `*ptr` as immutable
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}
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