diff options
Diffstat (limited to 'src/test/ui/regions/regions-free-region-ordering-incorrect.rs')
-rw-r--r-- | src/test/ui/regions/regions-free-region-ordering-incorrect.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/regions/regions-free-region-ordering-incorrect.rs b/src/test/ui/regions/regions-free-region-ordering-incorrect.rs new file mode 100644 index 000000000..1aee6e876 --- /dev/null +++ b/src/test/ui/regions/regions-free-region-ordering-incorrect.rs @@ -0,0 +1,22 @@ +// Test that free regions ordering only goes one way. That is, +// we have `&'a Node<'b, T>`, which implies that `'a <= 'b`, +// but not `'b <= 'a`. Hence, returning `&self.val` (which has lifetime +// `'a`) where `'b` is expected yields an error. +// +// This test began its life as a test for issue #4325. + +struct Node<'b, T: 'b> { + val: T, + next: Option<&'b Node<'b, T>> +} + +impl<'b, T> Node<'b, T> { + fn get<'a>(&'a self) -> &'b T { + match self.next { //~ ERROR lifetime may not live long enough + Some(ref next) => next.get(), + None => &self.val + } + } +} + +fn main() {} |