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dropped hash_traits in favor of individual traits

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joaquintides
2022-10-09 11:23:15 +02:00
parent 32a7ed74e8
commit 3fbaf21b8c
2 changed files with 9 additions and 12 deletions
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2
include/boost/unordered/detail/foa.hpp
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@ -843,7 +843,7 @@ table:empty_value<Hash,0>,empty_value<Pred,1>,empty_value<Allocator,1>
using size_policy=pow2_size_policy;
using prober=pow2_quadratic_prober;
using mix_policy=typename std::conditional<
hash_traits<Hash>::is_avalanching::value,
hash_is_avalanching<Hash>::value,
no_mix,
xmx_mix
>::type;

19
include/boost/unordered/hash_traits.hpp
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@ -20,31 +20,28 @@ namespace unordered{
namespace detail{
template<typename Hash,typename=void>
struct hash_is_avalanching
struct hash_is_avalanching_impl
{
using type=std::false_type;
};
template<typename Hash>
struct hash_is_avalanching<Hash,void_t<typename Hash::is_avalanching>>
struct hash_is_avalanching_impl<Hash,void_t<typename Hash::is_avalanching>>
{
using type=std::true_type;
};
} /* namespace detail */
/* Partially specializable by users for concrete hash functions when
* actual characterization differs from default.
/* Each trait can be partially specialized by users for concrete hash functions
* when actual characterization differs from default.
*/
/* Derived from std::true_type if the type Hash::is_avalanching is present,
* derived from std::false_type otherwise.
*/
template<typename Hash>
struct hash_traits
{
/* std::true_type if the type Hash::is_avalanching is present,
* std::false_type otherwise.
*/
using is_avalanching=typename detail::hash_is_avalanching<Hash>::type;
};
struct hash_is_avalanching:detail::hash_is_avalanching_impl<Hash>::type{};
} /* namespace unordered */
} /* namespace boost */