I would like to simply pass my data structure to its std c++ equivalent and have it construct from the given item or node.
For example:
auto& m = get_my_map();
...
// Using type deduction here for m instead of passing to template would be
std::map<int, std::string> m_map(m->node);
so I'm proposing a constructor for the standard data structures that will take a node type from a given structure and use it to construct itself using existing nodes and expected features of the node type.