Enum Derivative 

pub enum Derivative {
    Analytic,
    Unavailable,
}

Whether an analytic derivative is available for a given order.

Variants

Analytic

Exact analytic derivative implemented and available.

Unavailable

No analytic derivative; must be approximated or skipped.

Trait Implementations

impl Clone for Derivative

fn clone(&self) -> Derivative

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Derivative

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

Formats the value using the given formatter.

impl From<Derivative> for DeclaredHessianForm

Bridge for the partial migration from the legacy Derivative-only declaration to the richer DeclaredHessianForm used by the outer-optimizer planner. Family call sites that still produce Derivative (the simple available/unavailable bit) lift through this From impl without each rewriting its capability probe: Analytic defaults to Either so the seed loop inspects the realized seed eval and locks the route at runtime, mirroring the historical seed-eval-branch behavior; Unavailable projects to Unavailable. New call sites that already know whether the Hessian is materialized as Dense or comes through an Operator can construct the richer variant directly.

fn from(d: Derivative) -> Self

Converts to this type from the input type.

impl PartialEq for Derivative

fn eq(&self, other: &Derivative) -> 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 Derivative

impl Eq for Derivative

impl StructuralPartialEq for Derivative