Struct PopulationSnapshot 

pub struct PopulationSnapshot {
    pub generation: u32,
    pub fitnesses: Vec<f32>,
    pub diversity: Option<f32>,
    pub best_index: u32,
    pub best_genome_digest: Option<[u8; 16]>,
    pub parents_of_best: Vec<[u8; 16]>,
}

Per-generation population snapshot delivered to a PopulationObserver.

Fields mirror the on-disk PopulationSample schema; the harness emits one of these after every successful Strategy::tell call when an observer is attached.

Field semantics:

• fitnesses is the full per-individual fitness vector in natural (user-sense) space — the values are recorded before the harness canonicalises, so they read in the objective’s declared ObjectiveSense (a Minimize landscape’s costs, a Maximize objective’s rewards). best_index points at the best individual in that sense.
• diversity is currently None — the harness has no strategy-agnostic geometry over the population tensor. A future Strategy::diversity extension fills it in.
• best_genome_digest and parents_of_best are emitted empty / None until per-strategy digest + parent-tracking lands (will feed a lineage DAG panel).

Fields

generation: u32

fitnesses: Vec<f32>

diversity: Option<f32>

best_index: u32

best_genome_digest: Option<[u8; 16]>

parents_of_best: Vec<[u8; 16]>

Trait Implementations

impl Clone for PopulationSnapshot

fn clone(&self) -> PopulationSnapshot

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PopulationSnapshot

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for PopulationSnapshot

fn eq(&self, other: &PopulationSnapshot) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for PopulationSnapshot