Sprout/sprout/functional/hash/hash_value_traits.hpp
2016-04-08 12:51:11 +09:00

59 lines
1.8 KiB
C++

/*=============================================================================
Copyright (c) 2011-2016 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_HASH_VALUE_TRAITS_HPP
#define SPROUT_FUNCTIONAL_HASH_HASH_VALUE_TRAITS_HPP
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
#include <sprout/functional/hash/hash_fwd.hpp>
#include <sprout/adl/not_found.hpp>
namespace sprout_adl {
sprout::not_found_via_adl hash_value(...);
} // namespace sprout_adl
namespace sprout_hash_detail {
template<typename T>
inline SPROUT_CONSTEXPR std::size_t
call_hash_value(T const& v) {
using sprout::hash_value;
using sprout_adl::hash_value;
return hash_value(v);
}
} // namespace sprout_hash_detail
namespace sprout {
//
// hash_value_traits
//
template<typename T>
struct hash_value_traits {
public:
static SPROUT_CONSTEXPR std::size_t
hash_value(T const& v) {
return sprout_hash_detail::call_hash_value(v);
}
};
template<typename T>
struct hash_value_traits<T const>
: public sprout::hash_value_traits<T>
{};
template<typename T>
struct hash_value_traits<T volatile>
: public sprout::hash_value_traits<T>
{};
template<typename T>
struct hash_value_traits<T const volatile>
: public sprout::hash_value_traits<T>
{};
} // namespace sprout
#include <sprout/functional/hash/hash_range.hpp>
#include <sprout/functional/hash/hash_value.hpp>
#endif // #ifndef SPROUT_FUNCTIONAL_HASH_HASH_VALUE_TRAITS_HPP