Struct RefinementOptions 

pub struct RefinementOptions {
    pub min_refinement_steps: Index,
    pub max_refinement_steps: Index,
    pub residual_ratio_max: Number,
    pub residual_ratio_singular: Number,
    pub residual_improvement_factor: Number,
    pub neg_curv_test_tol: Number,
    pub neg_curv_test_reg: bool,
}

Iterative-refinement knobs baked onto the assembled crate::kkt::pd_full_space_solver::PdFullSpaceSolver. Defaults mirror IpPDFullSpaceSolver.cpp:RegisterOptions. All were registered but never read (#191).

Fields

min_refinement_steps: Index

min_refinement_steps — minimum iterative-refinement steps per linear solve.

max_refinement_steps: Index

max_refinement_steps — maximum iterative-refinement steps.

residual_ratio_max: Number

residual_ratio_max — refine until the residual test ratio drops below this (or max_refinement_steps is reached).

residual_ratio_singular: Number

residual_ratio_singular — above this ratio after failed refinement, the system is declared singular.

residual_improvement_factor: Number

residual_improvement_factor — minimum per-step reduction of the residual test ratio before refinement is aborted.

neg_curv_test_tol: Number

neg_curv_test_tol — tolerance α_n of the inertia-free curvature test of Zavala & Chiang (2014). Zero (the registered default) disables the heuristic and keeps the inertia check; positive turns the inertia check off and accepts the factorization only when the computed direction passes the curvature test in PdFullSpaceSolver::solve_once.

neg_curv_test_reg: bool

neg_curv_test_reg — whether the curvature test includes the primal regularization δ_x‖dx‖² + δ_s‖ds‖². Registered default yes; no reproduces the original Ipopt form that ignores it. Only consulted when neg_curv_test_tol > 0.

Trait Implementations

impl Clone for RefinementOptions

fn clone(&self) -> RefinementOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RefinementOptions

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

Formats the value using the given formatter.

impl Default for RefinementOptions

fn default() -> Self

Returns the “default value” for a type.