Method Subscribe

Subscribes to state changes.

public IDisposable Subscribe(Action<TState> listener, bool fireImmediately = false)

listener Action<TState>: Invoked on every state mutation. Must not be null.
fireImmediately bool: When true, the listener is invoked synchronously with Current before returning. Default is false — the listener fires only on subsequent state changes.

Subscribes to state changes with a (current, previous) signature.

public IDisposable Subscribe(Action<TState, TState> listener, bool fireImmediately = false)

listener Action<TState, TState>: Invoked with (currentState, previousState) on every state mutation. Must not be null.
fireImmediately bool: When true, fires the listener synchronously with (Current, Current) before returning (both arguments equal — there is no previous state at subscribe time). Default is false.