folly::unique_hash_key_algo_size_v

Digest size in bytes produced by the given hash algorithm object.

Synopsis

Declared in <folly/hash/UniqueHashKey.h>

template<auto Algo>
constexpr size_t unique_hash_key_algo_size_v = decltype(Algo(std::span<detail::unique_hash_key_item const>{})){}.size();