// -*- c++ -*-

//compile it with 

//g++ -ansi -pedantic

//and with 

//g++

//I did with g++ ver 3.0.4, suse 8.0

//If the template is removed from NodeMap, then it works well.

//athos@cs.elte.hu

//klao@cs.elte.hu

//marci@cs.elte.hu

class ListGraph {

public:

  ListGraph() { }

  template <typename T> class NodeMap {

    const ListGraph& G; 

  public:

    NodeMap(const ListGraph& _G) : G(_G) { }

  };

};

template<typename Graph> class GraphWrapper {

protected:

  Graph* graph;

public:

  GraphWrapper(Graph& _graph) : graph(&_graph) { }

  template<typename T> class NodeMap : public Graph::NodeMap<T> { 

  public:

    NodeMap(const GraphWrapper<Graph>& _G) :  

      Graph::NodeMap<T>(*(_G.graph)) { }

  };

};

template<typename Graph>

class ResGraphWrapper : public GraphWrapper<Graph> {

public:

  ResGraphWrapper(Graph& _graph) : GraphWrapper<Graph>(_graph) { }

};

template <typename Graph> class MaxFlow {

  const Graph* g;

  typedef ResGraphWrapper<const Graph> ResGW;

public:

  MaxFlow(const Graph& _g) : g(&_g) { }

  void augmentOnShortestPath() {

    ResGW res_graph(*g);

    typename ResGW::NodeMap<int> pred(res_graph); 

  }

};

int main(int, char **) {

  ListGraph G;

  MaxFlow<ListGraph> max_flow_test(G);

  max_flow_test.augmentOnShortestPath();

  return 0;

}