BSTree

Can anyone see what the problem with this may be?

Code:

template <class T>
BSTree<T>& BSTree<T>::operator= (const BSTree<T>& bst)
{
      if (this != &bst)
     {
            if (!isEmpty())
	clear(root);

             root=copyTree(bst.root);
      }

      return *this;
}

template <class T>
BTNode<T> *copyTree (BTNode<T> *treeRoot)
{
        BTNode<T> *newTree, *lptr, *rptr;

         if (treeRoot==NULL)
	return NULL;

         else
          {
	treeCopy=new BTNode<T>;
	treeCopy->info=treeRoot->info;
	treeCopy->lptr=copyTree(treeRoot->left);
	treeCopy->rptr=copyTree(treeRoot->right);
          }
          return treeCopy;
}

Does that code compile?

I am confused as to what the difference is between lptr (seemingly a local variable AND member of BSTree) and left, and rptr and right (seemingly a local variable AND member of BSTree).