Struct EwcPlusPlusBackend 

pub struct EwcPlusPlusBackend {
    pub lambda: f32,
    pub phi_scale: f32,
    /* private fields */
}

EWC++ implementation — the canonical production backend. Bidirectional plasticity: strengthens important weights, prunes irrelevant ones.

Fields

lambda: f32

EWC regularization strength λ

phi_scale: f32

Φ-weighting scale (0.0 = ignore Φ, 1.0 = full Φ-weighting)

Implementations

impl EwcPlusPlusBackend

pub fn new(lambda: f32) -> Self

pub fn consolidate( &mut self, weight_id: WeightId, weights: Vec<f32>, phi: Option<f32>, )

Consolidate current weights as the new optimal point. Called after learning a task to protect it from future forgetting.

pub fn update_fisher(&mut self, weight_id: WeightId, gradient: &[f32])

Update Fisher diagonal from gradient samples (online estimation).

Trait Implementations

impl PlasticityBackend for EwcPlusPlusBackend

fn name(&self) -> &'static str

fn compute_delta( &self, weight_id: WeightId, current: &[f32], gradient: &[f32], lr: f32, ) -> PlasticityDelta