boost/container_hash/detail/hash_tuple.hpp
// Copyright 2005-2009 Daniel James.
// Copyright 2021 Peter Dimov.
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#ifndef BOOST_HASH_DETAIL_HASH_TUPLE_LIKE_HPP
#define BOOST_HASH_DETAIL_HASH_TUPLE_LIKE_HPP
#include <boost/container_hash/hash_fwd.hpp>
#include <boost/type_traits/enable_if.hpp>
#include <boost/config.hpp>
#if defined(BOOST_NO_CXX11_HDR_TUPLE)
// no support
#else
#include <tuple>
namespace boost
{
namespace hash_detail
{
template <std::size_t I, typename T>
inline typename boost::enable_if_<(I == std::tuple_size<T>::value),
void>::type
hash_combine_tuple(std::size_t&, T const&)
{
}
template <std::size_t I, typename T>
inline typename boost::enable_if_<(I < std::tuple_size<T>::value),
void>::type
hash_combine_tuple(std::size_t& seed, T const& v)
{
boost::hash_combine(seed, std::get<I>(v));
boost::hash_detail::hash_combine_tuple<I + 1>(seed, v);
}
template <typename T>
inline std::size_t hash_tuple(T const& v)
{
std::size_t seed = 0;
boost::hash_detail::hash_combine_tuple<0>(seed, v);
return seed;
}
} // namespace hash_detail
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template <typename... T>
inline std::size_t hash_value(std::tuple<T...> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
#else
inline std::size_t hash_value(std::tuple<> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0>
inline std::size_t hash_value(std::tuple<A0> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1>
inline std::size_t hash_value(std::tuple<A0, A1> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1, typename A2>
inline std::size_t hash_value(std::tuple<A0, A1, A2> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1, typename A2, typename A3>
inline std::size_t hash_value(std::tuple<A0, A1, A2, A3> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1, typename A2, typename A3, typename A4>
inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5>
inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6>
inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5, A6> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7>
inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5, A6, A7> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8>
inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5, A6, A7, A8> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8, typename A9>
inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5, A6, A7, A8, A9> const& v)
{
return boost::hash_detail::hash_tuple(v);
}
#endif // #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
} // namespace boost
#endif // #if defined(BOOST_NO_CXX11_HDR_TUPLE)
#endif // #ifndef BOOST_HASH_DETAIL_HASH_TUPLE_LIKE_HPP