forked from boostorg/unordered
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
/* Hash function characterization.
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*
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* Copyright 2022 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* See https://www.boost.org/libs/unordered for library home page.
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*/
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#ifndef BOOST_UNORDERED_HASH_TRAITS_HPP
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#define BOOST_UNORDERED_HASH_TRAITS_HPP
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#include <boost/unordered/detail/type_traits.hpp>
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namespace boost{
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namespace unordered{
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namespace detail{
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template<typename Hash,typename=void>
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struct hash_is_avalanching_impl: std::false_type{};
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template<typename Hash>
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struct hash_is_avalanching_impl<Hash,
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boost::unordered::detail::void_t<typename Hash::is_avalanching> >:
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std::true_type{};
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} /* namespace detail */
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/* Each trait can be partially specialized by users for concrete hash functions
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* when actual characterization differs from default.
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*/
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/* hash_is_avalanching<Hash>::value is true when the type Hash::is_avalanching
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* is present, false otherwise.
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*/
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template<typename Hash>
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struct hash_is_avalanching: detail::hash_is_avalanching_impl<Hash>::type{};
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} /* namespace unordered */
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} /* namespace boost */
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#endif
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