pounce-algorithm 0.2.0

Algorithm-side core for POUNCE (port of Ipopt's src/Algorithm/): IteratesVector, IpoptData, CalculatedQuantities, KKT solvers, line search, mu update, conv check, initializer, IpoptAlg main loop, AlgBuilder.
Documentation 
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//! `HessianUpdater` trait — port of `IpHessianUpdater.hpp`.

use crate::ipopt_cq::IpoptCqHandle;
use crate::ipopt_data::IpoptDataHandle;

pub trait HessianUpdater {
    /// 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 update_hessian(&mut self, data: &IpoptDataHandle, cq: &IpoptCqHandle) -> bool;
}