pub struct Discriminant<T>(/* private fields */);
Available on crate feature
std
only.Expand description
Opaque type representing the discriminant of an enum.
See the discriminant
function in this module for more information.
Trait Implementations§
1.21.0 · Source§impl<T> Clone for Discriminant<T>
impl<T> Clone for Discriminant<T>
Source§fn clone(&self) -> Discriminant<T>
fn clone(&self) -> Discriminant<T>
Returns a copy of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read more1.21.0 · Source§impl<T> Debug for Discriminant<T>
impl<T> Debug for Discriminant<T>
1.21.0 · Source§impl<T> Hash for Discriminant<T>
impl<T> Hash for Discriminant<T>
1.21.0 · Source§impl<T> PartialEq for Discriminant<T>
impl<T> PartialEq for Discriminant<T>
impl<T> Copy for Discriminant<T>
impl<T> Eq for Discriminant<T>
Auto Trait Implementations§
impl<T> Freeze for Discriminant<T>
impl<T> RefUnwindSafe for Discriminant<T>
impl<T> Send for Discriminant<T>
impl<T> Sync for Discriminant<T>
impl<T> Unpin for Discriminant<T>
impl<T> UnwindSafe for Discriminant<T>
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> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
Source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
Source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.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.