Struct vtable::VWeak

pub struct VWeak<VTable: VTableMetaDropInPlace + 'static, X = Dyn> { /* private fields */ }

Weak pointer for the VRc where VTable is a VTable struct, and X is the type of the instance, or Dyn if it is not known

Similar to alloc::rc::Weak.

Can be constructed with VRc::downgrade and use VWeak::upgrade to re-create the original VRc.

Implementations

impl<VTable: VTableMetaDropInPlace + 'static, X> VWeak<VTable, X>

pub fn upgrade(&self) -> Option<VRc<VTable, X>>

Returns a new VRc if some other instance still holds a strong reference to this item. Otherwise, returns None.

pub fn ptr_eq(this: &Self, other: &Self) -> bool

Returns true if the two VWeak instances point to the same allocation

impl<VTable: VTableMetaDropInPlace + 'static, X: HasStaticVTable<VTable> + 'static> VWeak<VTable, X>

pub fn into_dyn(self) -> VWeak<VTable, Dyn>

Convert a VRc of a real instance to a VRc of a Dyn instance

Trait Implementations

impl<VTable: VTableMetaDropInPlace + 'static, X> Clone for VWeak<VTable, X>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<VTable: VTableMetaDropInPlace + 'static, X> Default for VWeak<VTable, X>

fn default() -> Self

Returns the “default value” for a type.

impl<T: VTableMetaDropInPlace + 'static, X> Drop for VWeak<T, X>

fn drop(&mut self)

Executes the destructor for this type.