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## Struct template unordered_default_bucket_traits

boost::intrusive::unordered_default_bucket_traits

## Synopsis

    // In header: <boost/intrusive/hashtable.hpp>

    template<typename ValueTraitsOrHookOption>
    struct unordered_default_bucket_traits {
      // types
      typedef ValueTraitsOrHookOption::template pack< empty >::proto_value_traits                                  supposed_value_traits;
      typedef bucket_traits_impl< typename unordered_bucket_ptr_impl< supposed_value_traits >::type, std::size_t > type;
    };

## Description

This metafunction will obtain the type of the default bucket traits (when the user does not specify the bucket_traits<> option) from the value_traits or hook option to be used with a hash container.