Trait CalcObserver 

pub trait CalcObserver: Send + Sync {
    // Required methods
    fn on_eval_start(&self, vertex_id: VertexId);
    fn on_eval_complete(&self, vertex_id: VertexId, duration: Duration);
    fn on_cycle_detected(&self, cycle: &[VertexId]);
    fn on_dirty_propagation(&self, vertex_id: VertexId, affected_count: usize);
}

Scalability hook reserved for calculation observability. No engine registration or invocation path currently delivers these notifications. Future delivery must catch observer panics and drop that notification without affecting values, completeness diagnostics or engine poison.

Required Methods

fn on_eval_start(&self, vertex_id: VertexId)

fn on_eval_complete(&self, vertex_id: VertexId, duration: Duration)

fn on_cycle_detected(&self, cycle: &[VertexId])

fn on_dirty_propagation(&self, vertex_id: VertexId, affected_count: usize)

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl CalcObserver for ()

Default no-op observer

fn on_eval_start(&self, _vertex_id: VertexId)

fn on_eval_complete(&self, _vertex_id: VertexId, _duration: Duration)

fn on_cycle_detected(&self, _cycle: &[VertexId])

fn on_dirty_propagation(&self, _vertex_id: VertexId, _affected_count: usize)

Implementors