Enum CrossoverDecline 

pub enum CrossoverDecline {
    NothingToIdentify,
    QpFailed,
    LineSearchFailed,
    ActiveSetNotConverged,
    Regressed,
    UserTolerances,
    TimeLimit,
}

Why crossover did not replace the interior iterate. Reported rather than swallowed: “crossover ran and declined” and “crossover never ran” are different facts about a solve, and the AMBIGUOUS-activity consumers this exists for need to tell them apart.

Variants

NothingToIdentify

The problem has no bounds and no constraints, so there is no active set to identify.

QpFailed

The EQP-equivalent QP did not solve, and step 4 was disabled or also failed. CrossoverReport::eqp says how it ended.

LineSearchFailed

The penalty line search could not accept a step from the interior iterate.

ActiveSetNotConverged

The full active-set run did not converge within crossover_max_iter.

Regressed

A point was produced but it is not at least as good a KKT point as the interior iterate (see accepts).

UserTolerances

The point meets the SQP’s tolerances in the scaled space but not the user’s constr_viol_tol / dual_inf_tol / compl_inf_tol on the model as declared (gh#1054). Scaling can shrink a row’s violation by orders of magnitude, so a point can be a scaled KKT point and an infeasible one at once; the interior-point verdict reads user units, and so does this gate.

TimeLimit

The solve’s max_wall_time / max_cpu_time ran out before crossover finished (gh#1054). The interior solution stands, as on every other decline: crossover refines a converged solve, so running out of time is never a reason to fail it.

Trait Implementations

impl Clone for CrossoverDecline

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CrossoverDecline

impl Debug for CrossoverDecline

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

Formats the value using the given formatter.

impl Eq for CrossoverDecline

impl PartialEq for CrossoverDecline

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CrossoverDecline