pub struct ValueRef<'a, V>{ /* private fields */ }
Expand description
A generic value reference into a buffer.
Implementations§
source§impl<'a, V: ?Sized + HasDrop> ValueRef<'a, V>
impl<'a, V: ?Sized + HasDrop> ValueRef<'a, V>
sourcepub fn value_type_id(&self) -> TypeId
pub fn value_type_id(&self) -> TypeId
Get the TypeId
of the referenced value.
sourcepub fn value_alignment(&self) -> usize
pub fn value_alignment(&self) -> usize
Get the alignment of the referenced value.
sourcepub fn is<T: 'static>(&self) -> bool
pub fn is<T: 'static>(&self) -> bool
Returns true
if this referenced value’s type is the same as T
.
sourcepub fn clone_value(&self) -> Value<Box<[MaybeUninit<u8>]>, V>
pub fn clone_value(&self) -> Value<Box<[MaybeUninit<u8>]>, V>
Clone the referenced value.
Unlike the Clone
trait, this function will produce an owned clone of the value pointed to
by this value reference.
sourcepub fn clone_small_value(&self) -> Value<MaybeUninit<usize>, V>
pub fn clone_small_value(&self) -> Value<MaybeUninit<usize>, V>
Clone the referenced value.
Unlike the Clone
trait, this function will produce an owned clone of the value pointed to
by this value reference.
This version of clone_value
tries to fit the underlying value into a usize
sized value,
and panics if that fails.
sourcepub fn downcast<T: 'static>(self) -> Option<&'a T>
pub fn downcast<T: 'static>(self) -> Option<&'a T>
Downcast this value reference into a borrowed T
type. Return None
if the downcast fails.
pub fn upcast<U: ?Sized + HasDrop + From<V>>(self) -> ValueRef<'a, U>where
V: Clone,
pub fn upcast_ref<U: ?Sized + HasDrop + From<V>>(&self) -> ValueRef<'_, U>where
V: Clone,
Trait Implementations§
source§impl<'a, V: ?Sized + HasPartialEq + HasDrop> PartialEq for ValueRef<'a, V>
impl<'a, V: ?Sized + HasPartialEq + HasDrop> PartialEq for ValueRef<'a, V>
impl<'a, V: ?Sized + HasEq + HasDrop> Eq for ValueRef<'a, V>
impl<'a, V: ?Sized + HasSend + HasDrop> Send for ValueRef<'a, V>
impl<'a, V: ?Sized + HasSync + HasDrop> Sync for ValueRef<'a, V>
Auto Trait Implementations§
impl<'a, V: ?Sized> RefUnwindSafe for ValueRef<'a, V>where
V: RefUnwindSafe,
impl<'a, V: ?Sized> Unpin for ValueRef<'a, V>
impl<'a, V: ?Sized> UnwindSafe for ValueRef<'a, V>where
V: UnwindSafe + RefUnwindSafe,
Blanket Implementations§
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> CloneBytes for Twhere
T: Clone + 'static,
impl<T> CloneBytes for Twhere
T: Clone + 'static,
unsafe fn clone_bytes(src: &[MaybeUninit<u8>]) -> Box<[MaybeUninit<u8>]>
unsafe fn clone_from_bytes(dst: &mut [MaybeUninit<u8>], src: &[MaybeUninit<u8>])
unsafe fn clone_into_raw_bytes( src: &[MaybeUninit<u8>], dst: &mut [MaybeUninit<u8>] )
source§impl<T> DebugBytes for Twhere
T: Debug + 'static,
impl<T> DebugBytes for Twhere
T: Debug + 'static,
source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Convert
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Convert
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.