Generalization of std::borrow::Cow, which can be used to reduce runtime
overhead in certain scenarios.
#[repr(transparent)] to Owned wrapperOwned. This allows specifying the borrowed type as an associated type of
the GenericCow trait, which aids type inference.From for Owned had to be removed.From<T> for Owned<T>From<T> for Owned<T>AsRef<U> for Owned<T> and implement
AsRef<T> only (this is to allow going from Owned<T> to T
where T: !AsRef<T>) (Yanked because .borrow() should be used in
that case.)Owned is now a simple wrapper with one type argument (of its
inner value).Owned::new has been removed.GenericCow<B>::Owned has been removed in favor of
using <B as ToOwned>::Owned.Deref as supertrait of GenericCow and added type argument to
GenericCow insteadOwned::borrowed to be
PhantomData<for<'a> fn(&'a O) -> &'a B> instead of using
PhantomData<*const B>, which broke correct autotrait behaviorOwnedOwned, which now contains a PhantomData of a reference to the
borrowed type. This makes OwnedRef superfluous, which has been removed.IntoOwned has been renamed to GenericCow.AsMut, BorrowMut and DerefMut implementations for OwnedIntoOwned for Box<T>, Vec<T>, and
StringOwnedRef<T>IntoOwned for Box<T> (where T: ?Sized),
Vec<T>, and String, with IntoOwned::Owned being set to Self
(replaces previous implementation for Box<T>)AsRef, AsMut, Borrow, BorrowMut,
and Display) have been added for Owned
(and Debug::fmt's output is transparent now)Deref is now a supertrait of IntoOwned and IntoOwned::Owned must
implement Borrow<<Self as Deref>::Target>