28 lines
603 B
Rust
28 lines
603 B
Rust
|
//@ run-pass
|
||
|
|
|
||
|
|
// Issue #62007: assigning over a deref projection of a box (in this
|
||
|
|
// case, `*list = n;`) should be able to kill all borrows of `*list`,
|
||
|
|
// so that `*list` can be borrowed on the next iteration through the
|
||
|
|
// loop.
|
||
|
|
|
||
|
|
#![allow(dead_code)]
|
||
|
|
|
||
|
|
struct List<T> {
|
||
|
|
value: T,
|
||
|
|
next: Option<Box<List<T>>>,
|
||
|
|
}
|
||
|
|
|
||
|
|
fn to_refs<T>(mut list: Box<&mut List<T>>) -> Vec<&mut T> {
|
||
|
|
let mut result = vec![];
|
||
|
|
loop {
|
||
|
|
result.push(&mut list.value);
|
||
|
|
if let Some(n) = list.next.as_mut() {
|
||
|
|
*list = n;
|
||
|
|
} else {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {}
|