rust/tests/ui/nll/issue-62007-assign-differing-fields.rs
2023-01-11 09:32:08 +00:00

26 lines
771 B
Rust

// Double-check we didn't go too far with our resolution to issue
// #62007: assigning over a field projection (`list.1 = n;` in this
// case) should kill only borrows of `list.1`; `list.0` can *not*
// necessarily 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<'a, T>(mut list: (&'a mut List<T>, &'a mut List<T>)) -> Vec<&'a mut T> {
let mut result = vec![];
loop {
result.push(&mut (list.0).value); //~ ERROR cannot borrow `list.0.value` as mutable
if let Some(n) = (list.0).next.as_mut() { //~ ERROR cannot borrow `list.0.next` as mutable
list.1 = n;
} else {
return result;
}
}
}
fn main() {}