How to iterate a boost property tree?

Question

I am know approaching to boost property tree and saw that it is a good feature of boost libs for c++ programming.

Well, I have one doubt? how to iterate a property t

Answer 1

BFS based print ptree traversal, May be used if we want to do some algorithmic manipulation

int print_ptree_bfs(ptree &tree) {
try {
    std::queue treeQ;
    std::queue strQ;

    ptree* temp;

    if (tree.empty())
        cout << "\"" << tree.data() << "\"";

    treeQ.push(&tree);
    //cout << tree.data();
    strQ.push(tree.data());

    while (!treeQ.empty()) {
        temp = treeQ.front();
        treeQ.pop();

        if (temp == NULL) {
            cout << "Some thing is wrong" << std::endl;
            break;
        }
        cout << "----- " << strQ.front() << "----- " << std::endl;
        strQ.pop();

        for (auto itr = temp->begin(); itr != temp->end(); itr++) {
            if (!itr->second.empty()) {
                //cout << itr->first << std::endl;
                treeQ.push(&itr->second);
                strQ.push(itr->first);
            } else {
                cout<first << " " << itr->second.data() << std::endl;
            }
        }

        cout << std::endl;

     }
   } catch (std::exception const& ex) {
    cout << ex.what() << std::endl;
   }
   return EXIT_SUCCESS;
  }