Struct ReducerBinding 

pub struct ReducerBinding<R: Reducer> { /* private fields */ }

A handle to one reducer’s state and actions inside one scope.

Names the scope and holds the state cell: reading keeps working after the scope is removed (the last frame of a page being navigated away from still renders), while pushing and subscribing quietly stop.

Implementations

impl<R: Reducer> ReducerBinding<R>

pub fn peek(&self) -> Ref<'_, R>

Borrows the state in place, for as long as nothing changes it.

pub fn get(&self) -> Rc<R>

The state as it is now, shared rather than copied. A change made while it is held goes to a copy, so what was read stays as it was.

pub fn dispatch(&self) -> Dispatch

What may be asked of the actors in the scope that owns this reducer.

pub fn push(&self, update: R::Update)

Applies an update directly, without an actor in between. A no-op once the owning scope is gone.

pub fn on_change(&self, f: impl Fn(&R) + 'static) -> Subscription

Calls f after every change, until the returned Subscription is dropped.

The caller owns the lifetime, which is what a reconciler needs: the subscription must end with the component instance, not with the scope, or unmounted components accumulate as live listeners.

pub fn on_change_owned(&self, f: impl Fn(&R) + 'static)

Like Self::on_change, but the subscription lives as long as the scope - for backends with no effect system to hang a cleanup on.

pub fn bind(&self, f: impl Fn(&R) + 'static) -> Subscription

Calls f immediately with the current state, then after every change.

Trait Implementations

impl<R: Reducer> Clone for ReducerBinding<R>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.