Function needs_rehash

src/fl/stl/unordered_map.h:318–320

returns true if (size + tombs)/capacity > _max_load/256

    // returns true if (size + tombs)/capacity > _max_load/256
    bool needs_rehash() const {
        return NeedsRehash(_size, _buckets.size(), _tombstones, mLoadFactor);
    }

    // insert or overwrite - returns pair<iterator, bool>
    // iterator points to element, bool is true if inserted, false if updated