Method MergingIterator

src/leveldb/table/merger.cc:16–25

class MergingIterator : public Iterator {
 public:
  MergingIterator(const Comparator* comparator, Iterator** children, int n)
      : comparator_(comparator),
        children_(new IteratorWrapper[n]),
        n_(n),
        current_(nullptr),
        direction_(kForward) {
    for (int i = 0; i < n; i++) {
      children_[i].Set(children[i]);
    }
  }

  ~MergingIterator() override { delete[] children_; }