Function VerifyXML

src/xml_parsing.cpp:464–695

}

void VerifyXML(const std::string& xml_text,
               const std::unordered_map<std::string, BT::NodeType>& registered_nodes)
{
  XMLDocument doc;
  auto xml_error = doc.Parse(xml_text.c_str(), xml_text.size());
  if(xml_error != tinyxml2::XML_SUCCESS)
  {
    char buffer[512];
    std::ignore =
        snprintf(buffer, sizeof buffer, "Error parsing the XML: %s", doc.ErrorName());
    throw RuntimeError(buffer);
  }

  //-------- Helper functions (lambdas) -----------------
  auto ThrowError = [&](int line_num, const std::string& text) {
    char buffer[512];
    std::ignore = snprintf(buffer, sizeof buffer, "Error at line %d: -> %s", line_num,
                           text.c_str());
    throw RuntimeError(buffer);
  };

  auto ChildrenCount = [](const XMLElement* parent_node) {
    int count = 0;
    for(auto node = parent_node->FirstChildElement(); node != nullptr;
        node = node->NextSiblingElement())
    {
      count++;
    }
    return count;
  };
  //-----------------------------

  const XMLElement* xml_root = doc.RootElement();

  if(xml_root == nullptr || !StrEqual(xml_root->Name(), "root"))
  {
    throw RuntimeError("The XML must have a root node called <root>");
  }
  //-------------------------------------------------
  auto models_root = xml_root->FirstChildElement("TreeNodesModel");
  auto meta_sibling = models_root != nullptr ? models_root->NextSiblingElement("TreeNodes"
                                                                               "Model") :
                                               nullptr;

  if(meta_sibling != nullptr)
  {
    ThrowError(meta_sibling->GetLineNum(), " Only a single node <TreeNodesModel> is "
                                           "supported");
  }
  if(models_root != nullptr)
  {
    // not having a MetaModel is not an error. But consider that the
    // Graphical editor needs it.
    for(auto node = xml_root->FirstChildElement(); node != nullptr;
        node = node->NextSiblingElement())
    {
      const std::string name = node->Name();
      if(name == "Action" || name == "Decorator" || name == "SubTree" ||