Struct OwnerHandle 

pub struct OwnerHandle(/* private fields */);

Weak access to an owner’s lifecycle. Safe to retain after disposal.

Implementations

impl OwnerHandle

pub fn guarded<A, R, F: FnMut(A) -> R>( &self, callback: F, ) -> impl FnMut(A) -> Option<R> + use<A, R, F>

Wrap a callback with a weak lifetime check. Late external callbacks return None after disposal (or before activation) instead of publishing state. The callback’s own captures still obey ordinary Rust ownership rules.

pub fn provide<K: ContextKey>( &self, value: K::Value, ) -> Result<(), ContextError>

Supply a value once on this owner. Descendants resolve the nearest key. This is not reactive registration: supply a signal for changing state.

pub fn context<K: ContextKey>(&self) -> Option<Rc<K::Value>>

Find the nearest live provider, including this owner. Missing/disposed context returns None. Lookup is untracked and does not keep owners alive. An obtained Rc can outlive the provider like any ordinary Rust value; disposal prevents further lookup and releases the owner’s reference.

pub fn is_child_of(&self, parent: &Self) -> bool

Whether this is an immediate child of the given lifetime.

pub fn is_active(&self) -> bool

pub fn is_disposed(&self) -> bool

pub fn on_activate(&self, callback: impl FnOnce() + 'static) -> Registration

Run on activation (immediately if active). Does not run after disposal.

pub fn on_cleanup(&self, callback: impl FnOnce() + 'static) -> Registration

Run once on disposal (immediately if already disposed).

Trait Implementations

impl Clone for OwnerHandle

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.