Struct ExactHessianUpdater 

pub struct ExactHessianUpdater;

Implementations

impl ExactHessianUpdater

pub fn new() -> Self

Trait Implementations

impl Default for ExactHessianUpdater

fn default() -> Self

Returns the “default value” for a type.

impl HessianUpdater for ExactHessianUpdater

fn hessian_at_current( &mut self, _data: &IpoptDataHandle, cq: &IpoptCqHandle, ) -> Option<Rc<dyn SymMatrix>>

A pure evaluation at the current iterate; data.w is untouched.

fn update_hessian(&mut self, data: &IpoptDataHandle, cq: &IpoptCqHandle) -> bool

Refresh data.w for the current iterate. Returns true on success. Mirrors IpHessianUpdater::UpdateHessian (which is pure-virtual; implementations write into IpData().Set_W(...)).

fn provides_exact_hessian(&self) -> bool

Whether data.w is the exact Lagrangian Hessian at the iterate it was built from, rather than a quasi-Newton approximation (gh #797).

fn fd_hessian_stats(&self) -> Option<FdStats>

The finite-difference Hessian’s pattern and probe census, for the updater that has one. None for every other updater.

fn reanchor(&mut self) -> bool

Discard the accumulated quasi-Newton curvature and re-anchor the approximation at the current iterate, returning true if there was anything to discard (gh#818).