diff options
Diffstat (limited to 'tests/ui/nll/mutating_references.rs')
-rw-r--r-- | tests/ui/nll/mutating_references.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/nll/mutating_references.rs b/tests/ui/nll/mutating_references.rs new file mode 100644 index 000000000..eb46b30b6 --- /dev/null +++ b/tests/ui/nll/mutating_references.rs @@ -0,0 +1,24 @@ +// run-pass + +struct List<T> { + value: T, + next: Option<Box<List<T>>>, +} + +fn to_refs<T>(mut list: &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() { + let mut list = List { value: 1, next: None }; + let vec = to_refs(&mut list); + assert_eq!(vec![&mut 1], vec); +} |