diff options
Diffstat (limited to 'src/test/ui/associated-types/normalization-generality-2.rs')
-rw-r--r-- | src/test/ui/associated-types/normalization-generality-2.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/normalization-generality-2.rs b/src/test/ui/associated-types/normalization-generality-2.rs new file mode 100644 index 000000000..d8790bb2d --- /dev/null +++ b/src/test/ui/associated-types/normalization-generality-2.rs @@ -0,0 +1,30 @@ +// build-pass + +// Ensures that we don't regress on "implementation is not general enough" when +// normalizating under binders. Unlike `normalization-generality.rs`, this also produces +// type outlives predicates that we must ignore. + +pub unsafe trait Yokeable<'a> { + type Output: 'a; +} +pub struct Yoke<Y: for<'a> Yokeable<'a>> { + _marker: std::marker::PhantomData<Y>, +} +impl<Y: for<'a> Yokeable<'a>> Yoke<Y> { + pub fn project<P>( + &self, + _f: for<'a> fn(&<Y as Yokeable<'a>>::Output, &'a ()) -> <P as Yokeable<'a>>::Output, + ) -> Yoke<P> + where + P: for<'a> Yokeable<'a>, + { + unimplemented!() + } +} +pub fn slice(y: Yoke<&'static str>) -> Yoke<&'static [u8]> { + y.project(move |yk, _| yk.as_bytes()) +} +unsafe impl<'a, T: 'static + ?Sized> Yokeable<'a> for &'static T { + type Output = &'a T; +} +fn main() {} |