Sprout/sprout/functional/hash/std/utility.hpp

/*=============================================================================
  Copyright (c) 2011-2015 Bolero MURAKAMI
  https://github.com/bolero-MURAKAMI/Sprout

  Distributed under the Boost Software License, Version 1.0. (See accompanying
  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#ifndef SPROUT_FUNCTIONAL_HASH_STD_UTILITY_HPP
#define SPROUT_FUNCTIONAL_HASH_STD_UTILITY_HPP

#include <utility>
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
#include <sprout/functional/hash/hash_value_traits.hpp>
#include <sprout/functional/hash/hash_values.hpp>

namespace sprout {
	//
	// hash_value_traits
	//
	template<typename T1, typename T2>
	struct hash_value_traits<std::pair<T1, T2> > {
	public:
		static SPROUT_CONSTEXPR std::size_t
		hash_value(std::pair<T1, T2> const& v) {
			return sprout::hash_values(v.first, v.second);
		}
	};
}	// namespace sprout

#endif	// #ifndef SPROUT_FUNCTIONAL_HASH_STD_UTILITY_HPP