[−][src]Struct vtable::VRef
VRef<'a MyTraitVTable>
can be thought as a &'a dyn MyTrait
It will dereference to a structure that has the same members as MyTrait.
Implementations
impl<'a, T: ?Sized + VTableMeta> VRef<'a, T>
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pub fn new<X: HasStaticVTable<T>>(value: &'a X) -> Self
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Create a new VRef from an reference of a type that can be associated with a VTable.
(the HasStaticVTable
is implemented by the “MyTrait”VTable_static!
macro generated by
the #vtable macro)
pub fn new_pin<X: HasStaticVTable<T>>(value: Pin<&'a X>) -> Pin<Self>
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Create a new Pin<VRef<_>> from a pinned reference. This is similar to VRef::new
.
pub unsafe fn from_raw(vtable: NonNull<T::VTable>, ptr: NonNull<u8>) -> Self
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Create a new VRef from raw pointers
Safety
The ptr
needs to be a valid object fitting the vtable
.
Both vtable and ptr lifetime must outlive 'a
pub fn downcast<X: HasStaticVTable<T>>(&self) -> Option<&X>
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Return a reference of the given type if the type is matching.
pub fn downcast_pin<X: HasStaticVTable<T>>(
this: Pin<Self>
) -> Option<Pin<&'a X>>
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this: Pin<Self>
) -> Option<Pin<&'a X>>
Return a reference of the given type if the type is matching
Trait Implementations
impl<'a, T: ?Sized + VTableMeta> Clone for VRef<'a, T>
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pub fn clone(&self) -> Self
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pub fn clone_from(&mut self, source: &Self)
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impl<'a, T: ?Sized + VTableMeta> Copy for VRef<'a, T>
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impl<'a, T: ?Sized + VTableMeta> Deref for VRef<'a, T>
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Auto Trait Implementations
impl<'a, T: ?Sized> RefUnwindSafe for VRef<'a, T> where
<T as VTableMeta>::Target: RefUnwindSafe,
<T as VTableMeta>::Target: RefUnwindSafe,
impl<'a, T> !Send for VRef<'a, T>
impl<'a, T> !Sync for VRef<'a, T>
impl<'a, T: ?Sized> Unpin for VRef<'a, T>
impl<'a, T: ?Sized> UnwindSafe for VRef<'a, T> where
<T as VTableMeta>::Target: RefUnwindSafe,
<T as VTableMeta>::Target: RefUnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,