* François Dumont:
> + // Get hash code for a node that comes from another _Hashtable.
> + // Reuse a cached hash code if the hash function is stateless,
> + // otherwise recalculate it using our own hash function.
> + __hash_code
> + _M_hash_code_ext(const __node_value_type& __from) const
> + {
> + if constexpr (__and_<__hash_cached, is_empty<_Hash>>::value)
> + return __from._M_hash_code;
> + else
> + return this->_M_hash_code(_ExtractKey{}(__from._M_v()));
> + }
Does C++ support stateful hash functions? I don't think so, and I don't
see it documented as a GNU extension, either.
Thanks,
Florian
