Struct CrossoverConfig 

pub struct CrossoverConfig {
    pub n_pairs: usize,
    pub swap_probability: f64,
}

Configuration of the generic crossover population kernel (SharedSiteCrossover) that EvolutionSMC::run and EvolutionSMC::anneal build from EvoSmcConfig::crossover.

The kernel swaps a random subset of the addresses shared by both parents (same address, same value type; each joins the swap independently with probability swap_probability) and re-scores both children strictly, rejecting any proposal whose children are not complete executions over their own pre-swap address sets. That makes it safe on every prior, including variable-structure ones (grammar trees, variable-length genomes): it cannot panic and it never accepts a structurally inconsistent child. The price is that on a variable-structure prior only structure-preserving swaps are ever accepted — constants, variable indices, same-arity function choices — because exchanging a structural site (a #leaf flag, an arity-changing #func) opens a branch the child has no choices for. Subtree grafts need the model-aware subtree_crossover_mask driven through EvolutionSMC::run_with_kernel / EvolutionSMC::anneal_with_kernel. On a fixed-structure prior (every vector prior in super::prior) the shared set is the whole address set and the kernel is exactly fugue’s [fugue::CrossoverKernel].

Fields

n_pairs: usize

Number of (pair, swap) proposals per sweep.

swap_probability: f64

Per-address probability that a shared site joins the swap mask.

Trait Implementations

impl Clone for CrossoverConfig

fn clone(&self) -> CrossoverConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CrossoverConfig

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

Formats the value using the given formatter.

impl Default for CrossoverConfig

fn default() -> Self

Returns the “default value” for a type.

impl From<&CrossoverConfig> for SharedSiteCrossover

fn from(cfg: &CrossoverConfig) -> Self

Converts to this type from the input type.