Struct KktDebug 

pub struct KktDebug {
    pub iter: i32,
    pub dim: i32,
    pub n_neg: i32,
    pub provides_inertia: bool,
    pub status: String,
    pub matrix: Option<(i32, Vec<i32>, Vec<i32>, Vec<f64>)>,
    pub l_factor: Option<FactorPattern>,
}

KKT-factorization diagnostics captured for the interactive debugger after a search-direction solve. Only populated when a debugger is installed (see IpoptAlgorithm); inspected via DebugCtx::kkt.

Fields

iter: i32

The outer iteration this factorization was assembled at. Lets the debugger label viz kkt / viz L with the iteration the system actually came from — at an iter_start pause that’s the previous iteration (the step that produced the current point), not the iterate you’re standing on.

dim: i32

Dimension of the augmented system (n + m).

n_neg: i32

Negative eigenvalues reported by the factorization (-1 if the backend doesn’t provide inertia).

provides_inertia: bool

Whether the backend reports inertia at all.

status: String

Debug string of the last factorization status.

matrix: Option<(i32, Vec<i32>, Vec<i32>, Vec<f64>)>

Assembled KKT triplets (dim, irn, jcn, vals), 1-based lower triangle — for viz kkt. Captured when a debugger is attached.

l_factor: Option<FactorPattern>

LDLᵀ factor pattern (+ values) — for viz L. Captured only after the debugger opts in (it’s the expensive piece).

Trait Implementations

impl Clone for KktDebug

fn clone(&self) -> KktDebug

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KktDebug

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

Formats the value using the given formatter.

impl Default for KktDebug

fn default() -> KktDebug

Returns the “default value” for a type.