Enum QpError 

pub enum QpError {
    DimensionMismatch(String),
    InvertedBounds(String),
    WarmStartDimensionMismatch(String),
    LinearSolverFailure(String),
    UnsupportedFeature(String),
}

Hard errors — problems the solver cannot return any meaningful solution for. Soft outcomes (max-iter, infeasible, unbounded) are reported via QpStatus inside a successful crate::QpSolution.

Variants

DimensionMismatch(String)

Problem-data dimensions disagree (e.g., g.len() != n).

InvertedBounds(String)

A bound vector contains bl > bu for some index.

WarmStartDimensionMismatch(String)

Warm-start working set has the wrong length for the problem dimensions.

LinearSolverFailure(String)

Linear-solver backend reported a hard failure that cannot be recovered by the inertia / refactor logic.

UnsupportedFeature(String)

Feature required by this QP is not yet implemented in the current crate phase (e.g., one-sided inequality constraints before the working-set machinery lands).

Implementations

impl QpError

pub fn is_recoverable_factorization_failure(&self) -> bool

True when this is a linear-solver failure that the §4.5 inertia-control loop may recover from by shifting the Hessian diagonal — i.e. a singular factor or a wrong-inertia report.

Centralizes the recoverability decision so the retry loops in solver.rs and schur.rs don’t each re-implement a fragile substring test. The match is case-insensitive: some failure messages embed the backend’s Debug-formatted ESymSolverStatus (Singular / WrongInertia, capitalized — produced by LinearSolver::resolve’s catch-all "resolve backend status: {status:?}"), which a bare lowercase contains("singular") / contains("inertia") would silently miss, so those failures would propagate as unrecoverable instead of triggering a shift retry (L14).

Trait Implementations

impl Clone for QpError

fn clone(&self) -> QpError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QpError

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

Formats the value using the given formatter.

impl Display for QpError

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

Formats the value using the given formatter.

impl Eq for QpError

impl Error for QpError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for QpError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for QpError