Struct IsotropicEs 

pub struct IsotropicEs { /* private fields */ }

(μ/μ_w, λ)-ES with cumulative step-size adaptation and no covariance adaptation — the CMA-ES ablation the M4.3 oracle’s sentinel runs.

See the module documentation for exactly which pieces are shared with the real sampler and which one is missing.

Implementations

impl IsotropicEs

pub fn new() -> Self

The ablation with the real sampler’s defaults.

Trait Implementations

impl Debug for IsotropicEs

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

Formats the value using the given formatter.

impl Default for IsotropicEs

fn default() -> Self

IsotropicEs::new.

impl Sampler for IsotropicEs

fn infer_relative_space(&self, study: &StudyView) -> Result<SpaceSchema>

The study’s declared space, verbatim.

Errors

Never.

fn sample_relative( &self, _study: &StudyView, trial: &TrialMeta, space: &SpaceSchema, ) -> Result<Assignment>

Draws one offspring x = clamp(m + σ·z) — the CMA-ES draw with B·D deleted — and turns it into an assignment.

Errors

Error::Sampler when the space has no continuous dimension or the lock is poisoned; Error::InvalidSpace if a declared distribution is malformed.

fn sample_independent( &self, _study: &StudyView, trial: &TrialMeta, name: &str, dist: &Distribution, ) -> Result<ParamValue>

The uniform fallback for a parameter the relative space did not cover.

Errors

Error::InvalidSpace if dist is malformed.

fn after_trial(&self, study: &StudyView, trial: &FrozenTrial) -> Result<()>

Admits the finished trial’s offspring and advances the generation when it is full — the real sampler’s rules (current generation, single objective, finite loss), minus the bred-coordinate check the oracle never exercises (no benchmark run enqueues or forks a trial).

Errors

Never: a failure here must not fail the trial.

fn reseed(&self, _seed: u64)

A no-op: the draws are keyed on the trial’s sampler_seed.

fn state(&self) -> Result<Option<StateBlob>, Error>

The sampler’s persistable state, if it has any.

fn snapshots_space(&self) -> bool

Whether this sampler enumerates a snapshot of the space it was constructed with, rather than the space each ask presents.

fn restore_state(&self, blob: &StateBlob) -> Result<(), Error>

Restores a sampler from a previously persisted blob.