Trait Upgrade 

pub trait Upgrade
where
    Self: Sized,
{
    type Strong;

    // Required method
    fn upgrade(&self) -> Option<Self::Strong>;
}

Trait for generalizing upgrading a weak reference to a strong reference.

Required Associated Types

type Strong

Strong reference type.

Required Methods

fn upgrade(&self) -> Option<Self::Strong>

Try upgrading a weak reference to a strong reference.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T> Upgrade for Weak<T>

type Strong = Rc<T>

fn upgrade(&self) -> Option<Self::Strong>

impl<T> Upgrade for Weak<T>

type Strong = Arc<T>

fn upgrade(&self) -> Option<Self::Strong>

impl<T> Upgrade for PhantomData<T>

type Strong = PhantomData<T>

fn upgrade(&self) -> Option<Self::Strong>

Implementors

impl<T: ObjectSubclass> Upgrade for ObjectImplWeakRef<T>

type Strong = ObjectImplRef<T>

impl<T: Downgrade + ObjectType> Upgrade for WeakRef<T>

type Strong = T