Struct WeakComponentInstanceInterface

pub struct WeakComponentInstanceInterface<C: ComponentInstanceInterface> {
    pub moniker: Moniker,
    /* private fields */
}

A wrapper for a weak reference to a type implementing ComponentInstanceInterface. Provides the moniker of the component instance, which is useful for error reporting if the original component instance has been destroyed.

Fields

moniker: Moniker

Implementations

impl<C: ComponentInstanceInterface> WeakComponentInstanceInterface<C>

pub fn new(component: &Arc<C>) -> Self

pub fn invalid() -> Self

Returns a new weak component instance that will always fail to upgrade.

pub fn upgrade(&self) -> Result<Arc<C>, ComponentInstanceError>

Attempts to upgrade this WeakComponentInterface<C> into an Arc<C>, if the original component instance interface C has not been destroyed.

Trait Implementations

impl<C: ComponentInstanceInterface> Clone for WeakComponentInstanceInterface<C>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<C: ComponentInstanceInterface> Debug for WeakComponentInstanceInterface<C>

fn fmt(&self, __f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<C: ComponentInstanceInterface> Default for WeakComponentInstanceInterface<C>

fn default() -> Self

Returns the “default value” for a type.

impl<C: ComponentInstanceInterface> From<&Arc<C>> for WeakComponentInstanceInterface<C>

fn from(component: &Arc<C>) -> Self

Converts to this type from the input type.

impl<C: ComponentInstanceInterface + 'static> From<WeakComponentInstanceInterface<C>> for WeakInstanceToken

fn from(instance: WeakComponentInstanceInterface<C>) -> Self

Converts to this type from the input type.

impl<C: ComponentInstanceInterface + 'static> PartialEq for WeakComponentInstanceInterface<C>

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<C: ComponentInstanceInterface + 'static> TryFrom<WeakInstanceToken> for WeakComponentInstanceInterface<C>

type Error = ()

The type returned in the event of a conversion error.

fn try_from( weak_component_token: WeakInstanceToken, ) -> Result<WeakComponentInstanceInterface<C>, Self::Error>

Performs the conversion.