MockNcclGroup.cc中是不是有bug

  MockNcclGroup::DoubleBinaryTreeNode* MockNcclGroup::InterDouBinTreeShift(DoubleBinaryTreeNode* root,std::vector<int>nodes){
    std::map<int,DoubleBinaryTreeNode*>node2treenode;
    std::map<int,int>rank2index;
    std::queue<DoubleBinaryTreeNode*>q;
    for(int i =0 ;i<nodes.size();i++) {
      node2treenode[nodes[i]] = new DoubleBinaryTreeNode(nodes[i]);
      rank2index[nodes[i]] = i;
    }
    q.push(root);
    while (!q.empty())
    {
      DoubleBinaryTreeNode* current = q.front();
      q.pop();
      int node = current->node;
      int nodeshift = nodes[(rank2index[node] + 1) % nodes.size()];
      DoubleBinaryTreeNode* currentshift = node2treenode[nodeshift];
      if(current->left != nullptr) {
        int leftnode = current->left->node;
        int leftnodeshift = nodes[(rank2index[leftnode] + 1) % nodes.size()];
        currentshift->left = node2treenode[leftnodeshift];
        q.push(current->left);
      }
      if(current->right != nullptr) {
        int rightnode = current->right->node;
        int rightnodeshift = nodes[(rank2index[rightnode] + 1) % nodes.size()];
        currentshift->right = node2treenode[rightnodeshift];
        q.push(current->right);
      }
    }
    return node2treenode[(nodes[rank2index[root->node]+1]) % nodes.size()];

有一个函数是这样的，返回语句的括号似乎写错位置了吧?
应该是这样对吗?

return node2treenode[nodes[(rank2index[root->node] + 1) % nodes.size()]];

Open MockNcclGroup.cc and inspect InterDouBinTreeShift, focusing first on the return expression's indexing and parentheses. Compare it with the node-shift calculations above, then verify that the corrected expression returns the shifted root node and run the project's relevant tests.