Re: [libxml++] NodeList problem.

[Darko Miletic <darko uvcms com>]

Jonathan Wakely wrote:

> Surely not?!?!
>
> If the container is empty calling begin() will return an iterator that
> compares equal to end().  _dereferencing_ that iterator would be an
> error, but not simply copying it.

It will be error if you use (as you did) reference to NodeList. You 
wrote the code like this:

const xmlpp::Node::NodeList& m_nodeList = root->get_children();

that means that you take reference to the temporary created nodelist 
object. It is invalid after that line is executed an hence the access 
violation. Therefore you need to copy it. Instead of const 
xmlpp::Node::NodeList& use just xmlpp::Node::NodeList that way the list 
will be copied as it should because the declaration of 
xmlpp::Node::get_children is like this:

NodeList get_children(const std::string& name = std::string());

So no reference is returned here.

The code should be like this:

xmlpp::Node::NodeList m_nodeList = root->get_children();
xmlpp::Node::NodeList::const_iterator itr = m_nodeList.begin();

Darko