Enum ArcFailure 

pub enum ArcFailure {
    NotConverged,
    Stagnated,
    NoDescent,
    NonFinite,
    SingularSystem,
    InaccurateSolve,
    BranchOrientation,
    DegenerateConstraint,
}

Why one arc-length attempt was rejected. Attempts are retried with a smaller radius; this only surfaces through AnalysisError::CutbacksExhausted.

Variants

NotConverged

The iteration budget ran out before every criterion passed.

Stagnated

Several iterations made no meaningful progress on the merit function.

NoDescent

Coupled backtracking found no step length that decreases the merit function.

NonFinite

A trial state, residual or correction was not finite.

SingularSystem

The bordered system was singular.

InaccurateSolve

The bordered solve’s scaled backward error stayed above target after refinement.

BranchOrientation

The converged increment pointed backward along the path.

DegenerateConstraint

The iterate returned to the committed point, where the constraint row vanishes.

Trait Implementations

impl Clone for ArcFailure

fn clone(&self) -> ArcFailure

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ArcFailure

impl Debug for ArcFailure

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

Formats the value using the given formatter.

impl Eq for ArcFailure

impl PartialEq for ArcFailure

fn eq(&self, other: &ArcFailure) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ArcFailure