Struct RejectEscalator 

pub struct RejectEscalator { /* private fields */ }

Geometric damping escalator for one reject chain (Madsen–Nielsen–Tingleff eq 3.16: the multiplier starts at 2 and doubles on every rejection, so successive bumps are ×2, ×4, ×8, …). Owns the factor and the reject count as one indivisible discipline — no branch can bump the damping without advancing the schedule, the drift mode behind #874. Deliberately does NOT own the per-iteration count; that is IterationBound’s job (see module docs for why the two must not be one type).

Implementations

impl RejectEscalator

pub fn new() -> Self

pub fn escalate(&mut self, damping: &mut f64)

Record a rejection: bumps the damping and advances the geometric schedule in one indivisible step.

pub fn restart(&mut self)

Restart the schedule — the problem changed under the chain (e.g. a Fisher fallback swapped the Hessian curvature), so the trajectory begins anew. Pairs with the caller resetting its damping baseline.

pub fn rejects(&self) -> usize

Rejections recorded since construction/restart (diagnostics).

Trait Implementations

impl Clone for RejectEscalator

fn clone(&self) -> RejectEscalator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RejectEscalator

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

Formats the value using the given formatter.

impl Default for RejectEscalator

fn default() -> Self

Returns the “default value” for a type.