/*Copyright 2014 Francisco Alvaro

This file is part of SESHAT.

  SESHAT is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  SESHAT is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with SESHAT.  If not, see <http://www.gnu.org/licenses/>.


This file is a modification of the RNNLIB original software covered by
the following copyright and permission notice:

*/
/*Copyright 2009,2010 Alex Graves

This file is part of RNNLIB.

RNNLIB is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

RNNLIB is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with RNNLIB.  If not, see <http://www.gnu.org/licenses/>.*/

#ifndef _INCLUDED_Optimiser_h
#define _INCLUDED_Optimiser_h

#include <algorithm>
#include <vector>

#include "DataExporter.hpp"

using namespace std;

struct Optimiser {
  // data
  vector<real_t>& wts;
  vector<real_t>& derivs;

  // functions
  Optimiser(vector<real_t>& weights, vector<real_t>& derivatives):
      wts(weights), derivs(derivatives) {
  }

  virtual ~Optimiser() {}
  virtual void update_weights() = 0;
  virtual void print(ostream& out = cout) const = 0;
  virtual void build() = 0;
};

ostream& operator << (ostream& out, const Optimiser& o);

#endif