Hash Traits :idprefix: hash_traits_ `<boost/unordered/hash_traits.hpp>` Synopsis Note:;; This header is deprecated. Use instead `link:../../../../../container_hash/doc/html/hash.html#ref_hash_is_avalanchinghash[boost::hash_is_avalanching]` defined in `link:../../../../../container_hash/doc/html/hash.html#ref_boostcontainer_hashhash_is_avalanching_hpp[<boost/container_hash/hash_is_avalanching.hpp>]`. Open-addressing and concurrent containers use the provided hash function `Hash` as-is if `hash_is_avalanching<Hash>::value` is `true`; otherwise, they implement a bit-mixing post-processing stage to increase the quality of hashing at the expense of extra computational cost. ---