pub struct DynDynRef<'a, B: ?Sized + DynDynBase, T: GetDynDynTable<B> + StableDeref>(_, _);Expand description
Wraps a reference to a pointer implementing GetDynDynTable<B> and which can be dereferenced to perform the downcast.
Using dyn_dyn_cast! on this struct will call GetDynDynTable::get_dyn_dyn_table on the pointer itself, then dereference this
pointer to perform the downcast. This allows a pointer implementing DynDyn<B> to be downcast into a reference without moving the
pointer itself.
Implementations
sourceimpl<'a, B: ?Sized + DynDynBase, T: GetDynDynTable<B> + StableDeref> DynDynRef<'a, B, T> where
T::Target: Unsize<B>,
impl<'a, B: ?Sized + DynDynBase, T: GetDynDynTable<B> + StableDeref> DynDynRef<'a, B, T> where
T::Target: Unsize<B>,
Trait Implementations
sourceimpl<'a, B: ?Sized + DynDynBase, T: DynDyn<'a, B> + StableDeref + 'a> DowncastUnchecked<'a, B> for DynDynRef<'a, B, T> where
T::Target: Unsize<B>,
impl<'a, B: ?Sized + DynDynBase, T: DynDyn<'a, B> + StableDeref + 'a> DowncastUnchecked<'a, B> for DynDynRef<'a, B, T> where
T::Target: Unsize<B>,
type DowncastResult<D: ?Sized + 'a> = &'a D
type DowncastResult<D: ?Sized + 'a> = &'a D
The result of downcasting this pointer to point to the type D. Note that this type need not have the same outer wrapper as the
type implementing DowncastUnchecked, since the result of the downcast may involve coercions and dereferences. Read more
sourceunsafe fn downcast_unchecked<D: ?Sized + DynDynCastTarget>(
self,
metadata: DynMetadata<D::Root>
) -> Self::DowncastResult<D>
unsafe fn downcast_unchecked<D: ?Sized + DynDynCastTarget>(
self,
metadata: DynMetadata<D::Root>
) -> Self::DowncastResult<D>
Downcasts this pointer into a new pointer pointing to the same object, but having type D. Read more
sourceimpl<'a, B: ?Sized + DynDynBase, T: GetDynDynTable<B> + StableDeref + 'a> GetDynDynTable<B> for DynDynRef<'a, B, T> where
T::Target: Unsize<B>,
impl<'a, B: ?Sized + DynDynBase, T: GetDynDynTable<B> + StableDeref + 'a> GetDynDynTable<B> for DynDynRef<'a, B, T> where
T::Target: Unsize<B>,
type DynTarget = <T as GetDynDynTable<B>>::DynTarget
type DynTarget = <T as GetDynDynTable<B>>::DynTarget
The actual type that this pointer currently points to. This type is used to allow propagation of auto trait bounds such as Send
and Sync in the dyn_dyn_cast! macro. Read more
sourcefn get_dyn_dyn_table(&self) -> DynDynTable
fn get_dyn_dyn_table(&self) -> DynDynTable
Gets the DynDynTable for the object that this pointer points to.
Auto Trait Implementations
impl<'a, B: ?Sized, T> RefUnwindSafe for DynDynRef<'a, B, T> where
T: RefUnwindSafe,
impl<'a, B: ?Sized, T> Send for DynDynRef<'a, B, T> where
T: Sync,
impl<'a, B: ?Sized, T> Sync for DynDynRef<'a, B, T> where
T: Sync,
impl<'a, B: ?Sized, T> Unpin for DynDynRef<'a, B, T>
impl<'a, B: ?Sized, T> UnwindSafe for DynDynRef<'a, B, T> where
T: RefUnwindSafe,
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more