Trait Downgrade

pub trait Downgrade: Sized {
    type Weak: Upgrade;

    // Required method
    fn downgrade(&self) -> Self::Weak;
}

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

Required Associated Types

type Weak: Upgrade

Weak reference type.

Required Methods

fn downgrade(&self) -> Self::Weak

Downgrade to a weak reference.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T> Downgrade for &T

where T: Downgrade,

type Weak = <T as Downgrade>::Weak

fn downgrade(&self) -> <&T as Downgrade>::Weak

impl<T> Downgrade for Rc<T>

type Weak = Weak<T>

fn downgrade(&self) -> <Rc<T> as Downgrade>::Weak

impl<T> Downgrade for Arc<T>

type Weak = Weak<T>

fn downgrade(&self) -> <Arc<T> as Downgrade>::Weak

impl<T> Downgrade for PhantomData<T>

type Weak = PhantomData<T>

fn downgrade(&self) -> <PhantomData<T> as Downgrade>::Weak

impl<T> Downgrade for TemplateChild<T>

where T: ObjectType + FromGlibPtrNone<*mut <T as ObjectType>::GlibType> + Downgrade,

type Weak = <T as Downgrade>::Weak

fn downgrade(&self) -> <TemplateChild<T> as Downgrade>::Weak

Implementors

impl<T> Downgrade for BorrowedObject<'_, T>

where T: Downgrade + ObjectType,

type Weak = <T as Downgrade>::Weak

impl<T> Downgrade for ObjectImplRef<T>

where T: ObjectSubclass,

type Weak = ObjectImplWeakRef<T>