static auto make_insertion_decision_generator(const filter_t &filter) {
using param_t = std::bernoulli_distribution::param_type;
bernoulli_distribution dist;
minstd_rand gen(3782348);
return [&filter, gen = std::move(gen), dist ]() mutable {
if (filter.empty())
return true;
if (filter.full())
return false;
const double load_factor = double(filter.size()) / filter.capacity();
return dist(gen, param_t(1.0 - load_factor));
};
}
// Checks whether lhs and rhs are clones.
static bool totally_equal(const filter_t &lhs, const filter_t &rhs) noexcept {
return lhs.size() == rhs.size() && lhs.capacity() == rhs.capacity() &&
lhs.quotient_bits() == rhs.quotient_bits() &&
lhs.remainder_bits() == rhs.remainder_bits() && equal(lhs, rhs);
}
