Struct LifecycleRunner 

pub struct LifecycleRunner<I: Indicator + Clone> { /* private fields */ }

Wraps an Indicator + Clone so BarLifecycle::Open/BarLifecycle::Update events can be replayed any number of times without permanently mutating state, and only BarLifecycle::Confirmed/BarLifecycle::Correction commit a new checkpoint.

Implementations

impl<I: Indicator + Clone> LifecycleRunner<I>

pub fn new(indicator: I) -> Self

pub fn confirmed_indicator(&self) -> Option<&I>

The indicator state as of the last confirmed/corrected bar (never a tentative open/update). None before the first confirmation.

pub fn on_event( &mut self, event: BarLifecycle, ) -> Result<Option<IndicatorOutput>, LifecycleError>

Processes one lifecycle event and returns the resulting output.

Open/Update always start from the last confirmed checkpoint (or a freshly reset indicator if none exists yet) before applying bar, so repeated calls for the same still-forming timestamp are idempotent and never stack on top of a prior tentative application.

Confirmed for a new (strictly later, or first-ever) timestamp advances both checkpoints. Confirmed or Correction for the same timestamp as the last confirmed bar replaces it: the pre-bar checkpoint is restored and the revised bar is applied exactly once, instead of stacking on top of the original bar’s effect. A Correction/out-of-order Confirmed for any other timestamp is rejected with LifecycleError, since only single-level undo is representable.