618     pub struct ReadOnly<T: ?Sized> {  struct
624     impl<T> ReadOnly<T> {  implementation
628         pub const fn new(t: T) -> ReadOnly<T> {  in new()
629             ReadOnly { inner: t }  in new()
635         pub fn into_inner(r: ReadOnly<T>) -> T {  in into_inner()
640     impl<T: ?Sized> ReadOnly<T> {  implementation
642         pub(crate) fn as_mut(r: &mut ReadOnly<T>) -> &mut T {  in as_mut()
652         pub(crate) const unsafe fn as_ref_unchecked(r: &ReadOnly<T>) -> &T {  in as_ref_unchecked()
661     unsafe_impl_known_layout!(T: ?Sized + KnownLayout => #[repr(T)] ReadOnly<T>);
673     unsafe_impl!(T: ?Sized + Unaligned => Unaligned for ReadOnly<T>);
675         T: ?Sized + TryFromBytes => TryFromBytes for ReadOnly<T>;
676 …    |c| T::is_bit_valid(c.cast::<_, <ReadOnly<T> as SizeEq<ReadOnly<ReadOnly<T>>>>::CastFrom, _>())
678     unsafe_impl!(T: ?Sized + FromZeros => FromZeros for ReadOnly<T>);
679     unsafe_impl!(T: ?Sized + FromBytes => FromBytes for ReadOnly<T>);
680     unsafe_impl!(T: ?Sized + IntoBytes => IntoBytes for ReadOnly<T>);
686     unsafe_impl!(T: ?Sized => Immutable for ReadOnly<T>);
693     define_cast!(unsafe { pub CastFromReadOnly<T: ?Sized> = ReadOnly<T> => T});
695     unsafe impl<T: ?Sized> CastExact<ReadOnly<T>, T> for CastFromReadOnly {}
697     define_cast!(unsafe { pub CastToReadOnly<T: ?Sized> = T => ReadOnly<T>});
699     unsafe impl<T: ?Sized> CastExact<T, ReadOnly<T>> for CastToReadOnly {}
701     impl<T: ?Sized> SizeEq<ReadOnly<T>> for T {
705     impl<T: ?Sized> SizeEq<T> for ReadOnly<T> {  implementation
712 unsafe impl<T: ?Sized> TransmuteFrom<T, Valid, Valid> for ReadOnly<T> {}  implementation
716 unsafe impl<T: ?Sized> TransmuteFrom<ReadOnly<T>, Valid, Valid> for T {}
718 impl<'a, T: ?Sized + Immutable> From<&'a T> for &'a ReadOnly<T> {  implementation
720     fn from(t: &'a T) -> &'a ReadOnly<T> {  in from()
729 impl<T: ?Sized + Immutable> Deref for ReadOnly<T> {  implementation
735         unsafe { ReadOnly::as_ref_unchecked(self) }  in deref()
739 impl<T: ?Sized + Immutable> DerefMut for ReadOnly<T> {  implementation
742         ReadOnly::as_mut(self)  in deref_mut()
746 impl<T: ?Sized + Immutable + Debug> Debug for ReadOnly<T> {  implementation
754 unsafe impl<T: HasTag + ?Sized> HasTag for ReadOnly<T> {  implementation
771         <T as SizeEq<ReadOnly<T>>>::CastFrom,
798     HasField<Field, VARIANT_ID, FIELD_ID> for ReadOnly<T>
809     type Type = ReadOnly<T::Type>;
812     fn project(slf: PtrInner<'_, Self>) -> *mut ReadOnly<T::Type> {  in project()
813         slf.project::<_, <T as SizeEq<ReadOnly<T>>>::CastFrom>()  in project()
815             .project::<_, <ReadOnly<T::Type> as SizeEq<T::Type>>::CastFrom>()  in project()
826     ProjectField<Field, I, VARIANT_ID, FIELD_ID> for ReadOnly<T>