mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-25 08:13:41 +00:00
23 lines
415 B
Rust
23 lines
415 B
Rust
struct Foo {
|
|
x: isize
|
|
}
|
|
|
|
|
|
impl Drop for Foo {
|
|
fn drop(&mut self) {
|
|
println!("drop {}", self.x);
|
|
}
|
|
}
|
|
|
|
|
|
fn main() {
|
|
let mut ptr: Box<_> = Box::new(Foo { x: 0 });
|
|
let mut test = |foo: &Foo| {
|
|
println!("access {}", foo.x);
|
|
ptr = Box::new(Foo { x: ptr.x + 1 });
|
|
println!("access {}", foo.x);
|
|
};
|
|
test(&*ptr);
|
|
//~^ ERROR: cannot borrow `*ptr` as immutable
|
|
}
|