Program Listing for File lmi0_oracle.hpp

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// -*- coding: utf-8 -*-
#pragma once

//#include "mat.hpp"
#include "ldlt_ext.hpp"
#include <gsl/span>
#include <optional>
#include <xtensor/xarray.hpp>

class lmi0_oracle
{
    using Arr = xt::xarray<double, xt::layout_type::row_major>;
    using Cut = std::tuple<Arr, double>;

  private:
    const gsl::span<const Arr> _F;
    const size_t _n;

  public:
    ldlt_ext _Q;

    explicit lmi0_oracle(gsl::span<const Arr> F)
        : _F {F}
        , _n {F[0].shape()[0]}
        , _Q(_n)
    {
    }

    auto operator()(const Arr& x) -> std::optional<Cut>;
};