Functor.hpp

// Copyright 2026 Lucas Mieg, Martin Moennigmann
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#ifndef __INC_OMD_FUNCTOR__
#define __INC_OMD_FUNCTOR__
 
#include "OMD/DataStore.hpp"
 
#include <functional>
 
namespace OMD
{
    class LineSearchFunctor
    {
    private:
        const DataStore &_DS;
    public:
        inline const Eigen::Index costDim() const {return 1;};
        LineSearchFunctor( const DataStore &DS);
        int cost(Eigen::VectorXd &fvec) const;
        double derivative( Eigen::MatrixXd &dF) const;
    };
};
 
#endif