diff options
Diffstat (limited to 'src/libcore')
| -rw-r--r-- | src/libcore/convert.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/libcore/convert.rs b/src/libcore/convert.rs index 65a226d37cb..21f9b1f5513 100644 --- a/src/libcore/convert.rs +++ b/src/libcore/convert.rs @@ -69,6 +69,14 @@ impl<'a, T: ?Sized, U: ?Sized> AsRef<U> for &'a mut T where T: AsRef<U> { } } +// FIXME (#23442): replace the above impls for &/&mut with the following more general one: +// // As lifts over Deref +// impl<D: ?Sized + Deref, U: ?Sized> AsRef<U> for D where D::Target: AsRef<U> { +// fn as_ref(&self) -> &U { +// self.deref().as_ref() +// } +// } + // AsMut implies Into impl<'a, T: ?Sized, U: ?Sized> Into<&'a mut U> for &'a mut T where T: AsMut<U> { fn into(self) -> &'a mut U { @@ -83,6 +91,14 @@ impl<'a, T: ?Sized, U: ?Sized> AsMut<U> for &'a mut T where T: AsMut<U> { } } +// FIXME (#23442): replace the above impl for &mut with the following more general one: +// // AsMut lifts over DerefMut +// impl<D: ?Sized + Deref, U: ?Sized> AsMut<U> for D where D::Target: AsMut<U> { +// fn as_mut(&mut self) -> &mut U { +// self.deref_mut().as_mut() +// } +// } + // From implies Into impl<T, U> Into<U> for T where U: From<T> { fn into(self) -> U { |