Function next_power_of_two

src/fl/stl/unordered_map.h:842–847

    };

    static fl::size next_power_of_two(fl::size n) {
        fl::size p = 1;
        while (p < n)
            p <<= 1;
        return p;
    }

    pair<fl::size, bool> find_slot(const Key &key) const {
        const fl::size cap = _buckets.size();