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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/nll/polonius/assignment-to-differing-field.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/nll/polonius/assignment-to-differing-field.rs')
-rw-r--r-- | src/test/ui/nll/polonius/assignment-to-differing-field.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/test/ui/nll/polonius/assignment-to-differing-field.rs b/src/test/ui/nll/polonius/assignment-to-differing-field.rs new file mode 100644 index 000000000..7ec3b9049 --- /dev/null +++ b/src/test/ui/nll/polonius/assignment-to-differing-field.rs @@ -0,0 +1,49 @@ +#![allow(dead_code)] + +// Compared to `assignment-kills-loans.rs`, we check here +// that we do not kill too many borrows. Assignments to the `.1` +// field projections should leave the borrows on `.0` intact. + +// compile-flags: -Z polonius + +struct List<T> { + value: T, + next: Option<Box<List<T>>>, +} + + +fn assignment_to_field_projection<'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 assignment_through_projection_chain<'a, T>( + mut list: (((((Box<&'a mut List<T>>, Box<&'a mut List<T>>),),),),), +) -> Vec<&'a mut T> { + let mut result = vec![]; + loop { + result.push(&mut ((((list.0).0).0).0).0.value); + //~^ ERROR cannot borrow `list.0.0.0.0.0.value` as mutable + + if let Some(n) = ((((list.0).0).0).0).0.next.as_mut() { + //~^ ERROR cannot borrow `list.0.0.0.0.0.next` as mutable + *((((list.0).0).0).0).1 = n; + } else { + return result; + } + } +} + +fn main() {} |