boost recognize a child

Question

My question is related to : boost

Some of the boost code is working correctly to find that a node has child, but if one node have two other nodes it didn't recognize the children.

It's recursive call to be able to read all the tree nodes and then apply the copy of the value to the google protocol buffer

void ReadXML(iptree& tree, string doc)
{
    const GPF* gpf= pMessage->GetGPF();
    for(int i = 0 ; i < gpf->field_count(); ++i)
    { 
          string fieldName = GetName(i);
          boost::optional< iptree & > chl =  pt.get_child_optional(fieldName); 
          if(chl) { 
          for( auto a : *chl ){
             boost::property_tree::iptree subtree = (boost::property_tree::iptree) a.second ;
             assignDoc(doc);
                 ReadXML(subtree, doc);
             }
           }
      }     
}

the XML file

<?xml version="1.0" encoding="utf-8"?>
<nodeA xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <nodeA.1>This is the Adresse</nodeA.1>
    <nodeA.2>
    <node1>
      <node1.1>
        <node1.1.1>Female</node1.1.1>
        <node1.1.2>23</node1.1.2>
        <node1.1.3>Engineer</node1.1.3>
      </node1.1>
      <node1.1>
        <node1.2.1>Female</node1.2.1>
        <node1.2.2>35</node1.2.2>
        <node1.2.3>Doctors</node1.2.3>
      </node1.1>
    </node1>
</nodeA.2>
<nodeA.3>Car 1</nodeA.3>
</nodeA>

My problem is that node1 is not recognised as having child. I don't know if it's because there are two children nodes with the same name.

Note that the XML files may change from one client to another. I may have different nodes.

Do I have to use a.second or a.first?

Answer 1

Here

boost::optional< iptree & > chl =  pt.get_child_optional(fieldName);

you explicitly search for a child with a given name. This name never seems the change during recursion. On every level you look for children with the same name it seems.