source: trunk/yat/normalizer/utility.h @ 2155

#ifndef _theplu_yat_normalizer_utility_
#define _theplu_yat_normalizer_utility_ 

// $Id: utility.h 2155 2010-01-17 23:22:10Z peter $

/*
  Copyright (C) 2010 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 "yat/utility/iterator_traits.h"
#include "yat/utility/WeightIterator.h"

#include <algorithm>

namespace theplu {
namespace yat {
namespace normalizer {

// internal functions in namespace detail
namespace detail {
  template<typename InputIterator, typename OutputIterator>
  void copy_weight_if_weighted(InputIterator first, InputIterator last,
                               OutputIterator result, 
                               utility::unweighted_iterator_tag tag)
  {
  }

  template<typename InputIterator, typename OutputIterator>
  void copy_weight_if_weighted(InputIterator first, InputIterator last,
                               OutputIterator result, 
                               utility::weighted_iterator_tag tag)
  {
    using utility::weight_iterator;
    std::copy(weight_iterator(first), weight_iterator(last), 
              weight_iterator(result));
  }

  /**
     internal function

     if \a result is weighted copy weights from [first, last) else do nothing
   */
  template<typename InputIterator, typename OutputIterator>
  void copy_weight_if_weighted(InputIterator first, InputIterator last,
                               OutputIterator result)
  {
    typename utility::weighted_iterator_traits<OutputIterator>::type tag;
    copy_weight_if_weighted(first, last, result, tag);
  }
} // of namespace detail

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

#endif