Enum FailedPivotMethod 

pub enum FailedPivotMethod {
    Tpp,
    Pass,
}

Strategy for handling columns that APTP fails to eliminate.

When APTP’s block-scoped search cannot find acceptable pivots for some columns, the FailedPivotMethod controls what happens next.

References

• Duff, Hogg & Lopez (2020), Section 3: TPP fallback after APTP
• SPRAL options%failed_pivot_method: 0 = pass, 1 = tpp (default)

Variants

Tpp

Retry failed columns with serial Threshold Partial Pivoting (default).

TPP searches ALL remaining columns for acceptable pivots, which succeeds where APTP’s block-scoped search fails.

Pass

Pass failed columns directly to parent as delays (no retry).

Trait Implementations

impl Clone for FailedPivotMethod

fn clone(&self) -> FailedPivotMethod

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FailedPivotMethod

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

Formats the value using the given formatter.

impl PartialEq for FailedPivotMethod

fn eq(&self, other: &FailedPivotMethod) -> 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 Copy for FailedPivotMethod

impl Eq for FailedPivotMethod

impl StructuralPartialEq for FailedPivotMethod