pub struct CopyOptimization<T: ?Sized>(/* private fields */);Expand description
An optimization hint about whether T is trivially copyable.
Implementations§
Source§impl<T: ?Sized> CopyOptimization<T>
impl<T: ?Sized> CopyOptimization<T>
Sourcepub const unsafe fn enable() -> Self
pub const unsafe fn enable() -> Self
Returns a CopyOptimization hint with the optimization enabled for T.
§Safety
T must not have any uninit bytes (e.g. padding).
Sourcepub const unsafe fn enable_if(value: bool) -> Self
pub const unsafe fn enable_if(value: bool) -> Self
Returns a CopyOptimization hint with the optimization enabled for T
if value is true.
§Safety
T must not have any uninit bytes (e.g. padding) if value is true.
Sourcepub const fn disable() -> Self
pub const fn disable() -> Self
Returns a CopyOptimization hint with the optimization disabled for
T.
Sourcepub const fn is_enabled(&self) -> bool
pub const fn is_enabled(&self) -> bool
Returns whether the optimization is enabled for T.
Auto Trait Implementations§
impl<T> Freeze for CopyOptimization<T>where
T: ?Sized,
impl<T> RefUnwindSafe for CopyOptimization<T>where
T: RefUnwindSafe + ?Sized,
impl<T> Send for CopyOptimization<T>
impl<T> Sync for CopyOptimization<T>
impl<T> Unpin for CopyOptimization<T>
impl<T> UnwindSafe for CopyOptimization<T>where
T: UnwindSafe + ?Sized,
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.