Method IsEmpty

src/leveldb/include/leveldb/iterator.h:88–88

True if the node is not used. Only head nodes might be unused.

  struct CleanupNode {
    // True if the node is not used. Only head nodes might be unused.
    bool IsEmpty() const { return function == nullptr; }
    // Invokes the cleanup function.
    void Run() {
      assert(function != nullptr);