operator[]()

template<typename Key, typename T, typename Hash = Hash<Key>, typename KeyEqual = EqualTo<Key>, int INLINED_COUNT = FASTLED_HASHMAP_INLINED_COUNT>

T & fl::unordered_map< Key, T, Hash, KeyEqual, INLINED_COUNT >::operator[] ( const Key & key )

inline

Definition at line 682 of file unordered_map.h.

                                  {
        fl::size idx;
        bool is_new;
 
        fl::pair<fl::size, bool> p = find_slot(key);
        idx = p.first;
        is_new = p.second;
        
        // Check if find_slot failed to find a valid slot (unordered_map is full)
        if (idx == npos()) {
            // Need to resize to make room
            if (needs_rehash()) {
                // if half the buckets are tombstones, rehash inline to prevent
                // memory growth. Otherwise, double the size.
                if (_tombstones >= _buckets.size() / 2) {
                    rehash_inline_no_resize();
                } else {
                    rehash_internal(_buckets.size() * 2);
                }
            } else {
                // Force a rehash with double size if needs_rehash() doesn't detect the issue
                rehash_internal(_buckets.size() * 2);
            }
            
            // Try find_slot again after resize
            p = find_slot(key);
            idx = p.first;
            is_new = p.second;
            
            // If still npos() after resize, allocation failed catastrophically
            if (idx == npos()) {
                // This should never happen after a successful resize
                static T default_value{};
                FASTLED_ASSERT(false, "unordered_map::operator[]: Failed to allocate after rehash");
                return default_value;
            }
        }
        
        if (is_new) {
            _buckets[idx].key = key;
            _buckets[idx].value = T{};
            mark_occupied(idx);
            ++_size;
        }
        return _buckets[idx].value;
    }