Struct ReducerStateHandle 

pub struct ReducerStateHandle<S> { /* private fields */ }

A handle to the current state managed by useReducer

This provides read-only access to the current state value with efficient concurrent access patterns and version tracking for change detection.

Implementations

impl<S> ReducerStateHandle<S>

where S: Clone,

pub fn get(&self) -> S

Get the current state value

This method provides efficient read access to the current state. Multiple readers can access the state concurrently.

pub fn field<F, R>(&self, accessor: F) -> R

where F: FnOnce(&S) -> R,

Get a specific field from the state without cloning the entire state

This is useful for accessing specific fields of complex state objects without the overhead of cloning the entire state.

pub fn version(&self) -> u64

Get the current version of the state (useful for change detection)

The version is incremented each time the state is updated through a reducer action. This can be used for optimization and debugging.

Trait Implementations

impl<S: Clone> Clone for ReducerStateHandle<S>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.