averager_traits.h

#ifndef _theplu_yat_utility_averager_traits_
#define _theplu_yat_utility_averager_traits_

// $Id: averager_traits.h 2119 2009-12-12 23:11:43Z peter $

/*
  Copyright (C) 2008 Jari Häkkinen, Peter Johansson

  This file is part of the yat library, http://dev.thep.lu.se/yat

  The yat library 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.

  The yat library 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 yat. If not, see <http://www.gnu.org/licenses/>.
*/

#include "Averager.h"
#include "AveragerWeighted.h"
#include "AveragerPair.h"
#include "AveragerPairWeighted.h"
#include "yat/utility/iterator_traits.h"

namespace theplu {
namespace yat {
namespace statistics {

  template <typename T>
  struct averager_traits{};

  template <>
  struct averager_traits<utility::unweighted_iterator_tag> 
  {
    typedef Averager type;
    typedef AveragerPair pair_type;
  };

  template <>
  struct averager_traits<utility::weighted_iterator_tag> 
  {
    typedef AveragerWeighted type;
    typedef AveragerPairWeighted pair_type;
  };

  template <typename Iterator>
  struct averager 
  {
    typedef typename averager_traits<typename utility::weighted_iterator_traits<Iterator>::type>::type type;
  };

  template <typename Iterator1, typename Iterator2>
  struct averager_pair 
  {
    typedef typename 
      averager_traits<
        typename utility::weighted_if_any2<Iterator1, Iterator2>::type
      >::pair_type type;
  };

}}} // of namespace statistics, yat, and theplu

#endif