hash_helper.hpp

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/*
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 *
 *             ***********************************************
 *                              PandA Project
 *                     URL: http://panda.dei.polimi.it
 *                       Politecnico di Milano - DEIB
 *                        System Architectures Group
 *             ***********************************************
 *              Copyright (C) 2015-2024 Politecnico di Milano
 *
 *   This file is part of the PandA framework.
 *
 *   The PandA framework 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.
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 *   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
#ifndef HASH_HELPER_HPP
#define HASH_HELPER_HPP

#include "custom_set.hpp"

#if NO_ABSEIL_HASH

#include <boost/functional/hash/hash.hpp>

namespace std
{
   template <typename T>
   struct hash<std::vector<T>> : public std::unary_function<std::vector<T>, std::size_t>
   {
      std::size_t operator()(const std::vector<T>& val) const
      {
         return boost::hash_range<typename std::vector<T>::const_iterator>(val.begin(), val.end());
      }
   };
} // namespace std

namespace std
{
   template <typename T, typename U>
   struct hash<std::pair<T, U>> : public std::unary_function<std::pair<T, U>, std::size_t>
   {
      std::size_t operator()(const std::pair<T, U>& val) const
      {
         size_t hash_value = 0;
         boost::hash_combine(hash_value, val.first);
         boost::hash_combine(hash_value, val.second);
         return hash_value;
      }
   };
} // namespace std
#endif
#endif