Trait ProgressObserver 

pub trait ProgressObserver: Send + Sync {
    // Required method
    fn step(&self, progress: StepProgress);

    // Provided methods
    fn admitted(&self) { ... }
    fn skipped(&self, _step: SkippedStep) { ... }
}

Synchronous, non-blocking callbacks. Implementations must perform no I/O, acquire no contended locks, and never wait for a consumer. Panics are counted and contained by the runtime. Observation cannot alter evidence.

Required Methods

fn step(&self, progress: StepProgress)

Provided Methods

fn admitted(&self)

Admission was acquired; this decision is no longer queued.

fn skipped(&self, _step: SkippedStep)

A recorded step was skipped (spec 042 3.7.1). Ignored by default, so an observer written before skipped steps existed is unchanged.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors