Struct State 

pub struct State<S: Eq + 'static> { /* private fields */ }

Host-owned state resource with explicit current, previous, and pending boundaries.

Implementations

impl<S: Eq + 'static> State<S>

pub fn new(initial: S) -> Self

Creates state with initial as Self::current and no pending transition.

pub fn current(&self) -> &S

Active state value after the last committed transition.

pub fn previous(&self) -> Option<&S>

Outgoing value from the most recent committed transition, if any.

pub fn pending(&self) -> Option<&S>

Requested next value awaiting apply, if any.

pub fn transition_tick(&self) -> Option<ChangeTick>

ChangeTick recorded when the last transition committed.

pub fn request(&mut self, next: S) -> Result<(), StateError>

Queues next for commit by apply; idempotent when already current or pending.