Enum OuterResultOrigin 

pub enum OuterResultOrigin {
    Solver,
    SeedAcceptedWithoutIteration,
    ArcBestIterateSubstitution,
    ArcInfeasibleStallCheckpoint,
    ArcCurvatureStationaryStop,
    BfgsCostStallExit,
    PerAtomFellnerSchall,
    EmptyParameterSpace,
    StationaryPointAudit,
}

Which lane actually produced an OuterResult.

OuterResult::solver_termination is None whenever no opt solver produced the result, and its own doc names three ways that happens — a cache short-circuit, a synthesized checkpoint, the per-atom Fellner–Schall lane — without recording WHICH. A refusal then reads termination=<no opt solver produced this result> and the reader is left to infer the lane from iteration counts, which is the #2465 shape: the decision is made, and the basis for it is dropped by the emitter that holds it. On the #1575 binomial fixture that absence is the whole question — a result at |Pg| = 5.991e-1 after 13 of 300 permitted outer iterations, PSD Hessian, nothing railed, is a search that stopped with descent still available, and “which lane stopped it” is the first thing anyone needs.

OuterResult::new defaults to Self::Solver; the gam-side lanes that synthesize a result overwrite it at their construction site.

Variants

Solver

An opt solver ran and its solution was translated into this result.

SeedAcceptedWithoutIteration

A seed was accepted as its own optimum with zero outer iterations.

ArcBestIterateSubstitution

ARC exhausted its budget on a last iterate WORSE than the best feasible iterate it had seen, so the best iterate was substituted (#1371/#1476).

ArcInfeasibleStallCheckpoint

ARC hit a run of infeasible probes with no synchronized Hessian, so a checkpoint was rebuilt from the stored best iterate.

ArcCurvatureStationaryStop

ARC was stopped at a point its own terminal certificate accepts: the Newton decrement ½gᵀH⁻¹g of the rail-projected gradient sat at or below the criterion’s resolution under a PSD reduced Hessian (#2817).

BfgsCostStallExit

The BFGS cost-stall guard halted the search and published its best iterate, which was rebuilt into this result.

PerAtomFellnerSchall

The per-atom Fellner–Schall frontier lane.

EmptyParameterSpace

The parameter space is empty; there was nothing to optimize.

StationaryPointAudit

A caller-supplied point audited without running any optimizer.

Trait Implementations

impl Clone for OuterResultOrigin

fn clone(&self) -> OuterResultOrigin

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OuterResultOrigin

impl Debug for OuterResultOrigin

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

Formats the value using the given formatter.

impl Eq for OuterResultOrigin

impl PartialEq for OuterResultOrigin

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OuterResultOrigin