pub struct Null;Expand description
Niching for null-pointer-niched values.
Trait Implementations§
Source§impl<T> Niching<ArchivedBox<T>> for Null
impl<T> Niching<ArchivedBox<T>> for Null
Source§unsafe fn is_niched(niched: *const ArchivedBox<T>) -> bool
unsafe fn is_niched(niched: *const ArchivedBox<T>) -> bool
Returns whether the given value has been niched. Read more
Source§fn resolve_niched(out: Place<ArchivedBox<T>>)
fn resolve_niched(out: Place<ArchivedBox<T>>)
Writes data to
out indicating that a T is niched.Auto Trait Implementations§
impl Freeze for Null
impl RefUnwindSafe for Null
impl Send for Null
impl Sync for Null
impl Unpin for Null
impl UnsafeUnpin for Null
impl UnwindSafe for Null
Blanket Implementations§
Source§impl<T> ArchivePointee for T
impl<T> ArchivePointee for T
Source§type ArchivedMetadata = ()
type ArchivedMetadata = ()
The archived version of the pointer metadata for this type.
Source§fn pointer_metadata(
_: &<T as ArchivePointee>::ArchivedMetadata,
) -> <T as Pointee>::Metadata
fn pointer_metadata( _: &<T as ArchivePointee>::ArchivedMetadata, ) -> <T as Pointee>::Metadata
Converts some archived metadata to the pointer metadata for itself.
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> LayoutRaw for T
impl<T> LayoutRaw for T
Source§fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>
fn layout_raw(_: <T as Pointee>::Metadata) -> Result<Layout, LayoutError>
Returns the layout of the type.
Source§impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
impl<T, N1, N2> Niching<NichedOption<T, N1>> for N2
Source§unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool
unsafe fn is_niched(niched: *const NichedOption<T, N1>) -> bool
Returns whether the given value has been niched. Read more
Source§fn resolve_niched(out: Place<NichedOption<T, N1>>)
fn resolve_niched(out: Place<NichedOption<T, N1>>)
Writes data to
out indicating that a T is niched.