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add tuple hash support

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This commit is contained in:
bolero-MURAKAMI 2012-07-15 23:06:29 +09:00
parent 2d039ad6b4
commit 5918f1c773
3 changed files with 64 additions and 4 deletions
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32
sprout/tuple/tuple/hash.hpp Normal file
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#ifndef SPROUT_TUPLE_TUPLE_HASH_HPP
#define SPROUT_TUPLE_TUPLE_HASH_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/index_tuple.hpp>
#include <sprout/functional/hash/hash.hpp>
#include <sprout/tuple/tuple/tuple.hpp>
#include <sprout/tuple/tuple/get.hpp>
namespace sprout {
namespace detail {
template<typename... Types, sprout::index_t... Indexes>
inline SPROUT_CONSTEXPR std::size_t tuple_hash_value_impl(
sprout::tuples::tuple<Types...> const& v,
sprout::index_tuple<Indexes...>
)
{
return sprout::hash_values(sprout::tuples::get<Indexes>(v)...);
}
} // namespace detail
template<typename... Types>
inline SPROUT_CONSTEXPR std::size_t hash_value(sprout::tuples::tuple<Types...> const& v) {
return sprout::detail::tuple_hash_value_impl(
v,
sprout::index_range<0, sprout::tuples::tuple_size<sprout::tuples::tuple<Types...> >::value>::make()
);
}
} // namespace sprout
#endif // #ifndef SPROUT_TUPLE_TUPLE_HASH_HPP