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     2 #ifndef HUGO_GRAPH_WRAPPER_H
 
     3 #define HUGO_GRAPH_WRAPPER_H
 
     9   template<typename Graph>
 
    10   class TrivGraphWrapper {
 
    15     typedef Graph BaseGraph;
 
    17     typedef typename Graph::Node Node;
 
    18     class NodeIt : public Graph::NodeIt { 
 
    21       NodeIt(const typename Graph::NodeIt& n) : Graph::NodeIt(n) { }
 
    22       NodeIt(const Invalid& i) : Graph::NodeIt(i) { }
 
    23       NodeIt(const TrivGraphWrapper<Graph>& _G) : 
 
    24 	Graph::NodeIt(*(_G.graph)) { }
 
    26     typedef typename Graph::Edge Edge;
 
    27     //typedef typename Graph::OutEdgeIt OutEdgeIt;
 
    28     class OutEdgeIt : public Graph::OutEdgeIt { 
 
    31       OutEdgeIt(const typename Graph::OutEdgeIt& e) : Graph::OutEdgeIt(e) { }
 
    32       OutEdgeIt(const Invalid& i) : Graph::OutEdgeIt(i) { }
 
    33       OutEdgeIt(const TrivGraphWrapper<Graph>& _G, const Node& n) : 
 
    34 	Graph::OutEdgeIt(*(_G.graph), n) { }
 
    36     //typedef typename Graph::InEdgeIt InEdgeIt;
 
    37     class InEdgeIt : public Graph::InEdgeIt { 
 
    40       InEdgeIt(const typename Graph::InEdgeIt& e) : Graph::InEdgeIt(e) { }
 
    41       InEdgeIt(const Invalid& i) : Graph::InEdgeIt(i) { }
 
    42       InEdgeIt(const TrivGraphWrapper<Graph>& _G, const Node& n) : 
 
    43 	Graph::InEdgeIt(*(_G.graph), n) { }
 
    45     //typedef typename Graph::SymEdgeIt SymEdgeIt;
 
    46     //typedef typename Graph::EdgeIt EdgeIt;
 
    47     class EdgeIt : public Graph::EdgeIt { 
 
    50       EdgeIt(const typename Graph::EdgeIt& e) : Graph::EdgeIt(e) { }
 
    51       EdgeIt(const Invalid& i) : Graph::EdgeIt(i) { }
 
    52       EdgeIt(const TrivGraphWrapper<Graph>& _G) : 
 
    53 	Graph::EdgeIt(*(_G.graph)) { }
 
    56     //TrivGraphWrapper() : graph(0) { }
 
    57     TrivGraphWrapper(Graph& _graph) : graph(&_graph) { }
 
    59 //    void setGraph(Graph& _graph) { graph = &_graph; }
 
    60 //    Graph& getGraph() const { return (*graph); }
 
    62     NodeIt& first(NodeIt& i) const { 
 
    66     EdgeIt& first(EdgeIt& i) const { 
 
    70 //     template<typename I> I& first(I& i) const { 
 
    71 //       //return graph->first(i); 
 
    75     OutEdgeIt& first(OutEdgeIt& i, const Node& p) const { 
 
    76       i=OutEdgeIt(*this, p);
 
    79     InEdgeIt& first(InEdgeIt& i, const Node& p) const { 
 
    83 //     template<typename I, typename P> I& first(I& i, const P& p) const { 
 
    84 //       //return graph->first(i, p);
 
    89 //    template<typename I> I getNext(const I& i) const { 
 
    90 //      return graph->getNext(i); }
 
    91     template<typename I> I& next(I &i) const { graph->next(i); return i; }    
 
    93     template< typename It > It first() const { 
 
    94       It e; first(e); return e; }
 
    96     template< typename It > It first(const Node& v) const { 
 
    97       It e; first(e, v); return e; }
 
    99     Node head(const Edge& e) const { return graph->head(e); }
 
   100     Node tail(const Edge& e) const { return graph->tail(e); }
 
   102     template<typename I> bool valid(const I& i) const 
 
   103       { return graph->valid(i); }
 
   105     //template<typename I> void setInvalid(const I &i);
 
   106     //{ return graph->setInvalid(i); }
 
   108     int nodeNum() const { return graph->nodeNum(); }
 
   109     int edgeNum() const { return graph->edgeNum(); }
 
   111     template<typename I> Node aNode(const I& e) const { 
 
   112       return graph->aNode(e); }
 
   113     template<typename I> Node bNode(const I& e) const { 
 
   114       return graph->bNode(e); }
 
   116     Node addNode() const { return graph->addNode(); }
 
   117     Edge addEdge(const Node& tail, const Node& head) const { 
 
   118       return graph->addEdge(tail, head); }
 
   120     template<typename I> void erase(const I& i) const { graph->erase(i); }
 
   122     void clear() const { graph->clear(); }
 
   124     template<typename T> class NodeMap : public Graph::NodeMap<T> { 
 
   126       NodeMap(const TrivGraphWrapper<Graph>& _G) :  
 
   127 	Graph::NodeMap<T>(*(_G.graph)) { }
 
   128       NodeMap(const TrivGraphWrapper<Graph>& _G, T a) : 
 
   129 	Graph::NodeMap<T>(*(_G.graph), a) { }
 
   132     template<typename T> class EdgeMap : public Graph::EdgeMap<T> { 
 
   134       EdgeMap(const TrivGraphWrapper<Graph>& _G) :  
 
   135 	Graph::EdgeMap<T>(*(_G.graph)) { }
 
   136       EdgeMap(const TrivGraphWrapper<Graph>& _G, T a) : 
 
   137 	Graph::EdgeMap<T>(*(_G.graph), a) { }
 
   140     template<typename Map, typename T> class NodeMapWrapper {
 
   144       NodeMapWrapper(Map& _map) : map(&_map) { }
 
   145       //template<typename T> 
 
   146       void set(Node n, T a) { map->set(n, a); }
 
   147       //template<typename T>
 
   148       T get(Node n) const { return map->get(n); }
 
   151     template<typename Map, typename T> class EdgeMapWrapper {
 
   155       EdgeMapWrapper(Map& _map) : map(&_map) { }
 
   156       //template<typename T> 
 
   157       void set(Edge n, T a) { map->set(n, a); }
 
   158       //template<typename T>
 
   159       T get(Edge n) const { return map->get(n); }
 
   163   template<typename GraphWrapper>
 
   164   class GraphWrapperSkeleton {
 
   169     //typedef typename GraphWrapper::BaseGraph BaseGraph;
 
   171 //     typedef typename GraphWrapper::Node Node;
 
   172 //     typedef typename GraphWrapper::NodeIt NodeIt;
 
   174 //     typedef typename GraphWrapper::Edge Edge;
 
   175 //     typedef typename GraphWrapper::OutEdgeIt OutEdgeIt;
 
   176 //     typedef typename GraphWrapper::InEdgeIt InEdgeIt;
 
   177 //     //typedef typename GraphWrapper::SymEdgeIt SymEdgeIt;
 
   178 //     typedef typename GraphWrapper::EdgeIt EdgeIt;
 
   180     typedef typename GraphWrapper::Node Node;
 
   181     class NodeIt : public GraphWrapper::NodeIt { 
 
   184       NodeIt(const typename GraphWrapper::NodeIt& n) : 
 
   185 	GraphWrapper::NodeIt(n) { }
 
   186       NodeIt(const Invalid& i) : GraphWrapper::NodeIt(i) { }
 
   187       NodeIt(const GraphWrapperSkeleton<GraphWrapper>& _G) : 
 
   188 	GraphWrapper::NodeIt(_G.gw) { }
 
   190     typedef typename GraphWrapper::Edge Edge;
 
   191     //typedef typename GraphWrapper::OutEdgeIt OutEdgeIt;
 
   192     class OutEdgeIt : public GraphWrapper::OutEdgeIt { 
 
   195       OutEdgeIt(const typename GraphWrapper::OutEdgeIt& e) : 
 
   196 	GraphWrapper::OutEdgeIt(e) { }
 
   197       OutEdgeIt(const Invalid& i) : GraphWrapper::OutEdgeIt(i) { }
 
   198       OutEdgeIt(const GraphWrapperSkeleton<GraphWrapper>& _G, const Node& n) : 
 
   199 	GraphWrapper::OutEdgeIt(_G.gw, n) { }
 
   201     //typedef typename GraphWrapper::InEdgeIt InEdgeIt;
 
   202     class InEdgeIt : public GraphWrapper::InEdgeIt { 
 
   205       InEdgeIt(const typename GraphWrapper::InEdgeIt& e) : 
 
   206 	GraphWrapper::InEdgeIt(e) { }
 
   207       InEdgeIt(const Invalid& i) : GraphWrapper::InEdgeIt(i) { }
 
   208       InEdgeIt(const GraphWrapperSkeleton<GraphWrapper>& _G, const Node& n) : 
 
   209 	GraphWrapper::InEdgeIt(_G.gw, n) { }
 
   211     //typedef typename GraphWrapper::SymEdgeIt SymEdgeIt;
 
   212     //typedef typename GraphWrapper::EdgeIt EdgeIt;
 
   213     class EdgeIt : public GraphWrapper::EdgeIt { 
 
   216       EdgeIt(const typename GraphWrapper::EdgeIt& e) : 
 
   217 	GraphWrapper::EdgeIt(e) { }
 
   218       EdgeIt(const Invalid& i) : GraphWrapper::EdgeIt(i) { }
 
   219       EdgeIt(const GraphWrapperSkeleton<GraphWrapper>& _G) : 
 
   220 	GraphWrapper::EdgeIt(_G.gw) { }
 
   224     //GraphWrapperSkeleton() : gw() { }
 
   225     GraphWrapperSkeleton(GraphWrapper _gw) : gw(_gw) { }
 
   227     //void setGraph(BaseGraph& _graph) { gw.setGraph(_graph); }
 
   228     //BaseGraph& getGraph() const { return gw.getGraph(); }
 
   230     template<typename I> I& first(I& i) const {       
 
   234     template<typename I, typename P> I& first(I& i, const P& p) const { 
 
   239 //    template<typename I> I getNext(const I& i) const { return gw.getNext(i); }
 
   240     template<typename I> I& next(I &i) const { gw.next(i); return i; }    
 
   242     template< typename It > It first() const { 
 
   243       It e; this->first(e); return e; }
 
   245     template< typename It > It first(const Node& v) const { 
 
   246       It e; this->first(e, v); return e; }
 
   248     Node head(const Edge& e) const { return gw.head(e); }
 
   249     Node tail(const Edge& e) const { return gw.tail(e); }
 
   251     template<typename I> bool valid(const I& i) const { return gw.valid(i); }
 
   253     //template<typename I> void setInvalid(const I &i);
 
   254     //{ return graph->setInvalid(i); }
 
   256     int nodeNum() const { return gw.nodeNum(); }
 
   257     int edgeNum() const { return gw.edgeNum(); }
 
   259     template<typename I> Node aNode(const I& e) const { return gw.aNode(e); }
 
   260     template<typename I> Node bNode(const I& e) const { return gw.bNode(e); }
 
   262     Node addNode() const { return gw.addNode(); }
 
   263     Edge addEdge(const Node& tail, const Node& head) const { 
 
   264       return gw.addEdge(tail, head); }
 
   266     template<typename I> void erase(const I& i) const { gw.erase(i); }
 
   268     void clear() const { gw.clear(); }
 
   270     template<typename T> class NodeMap : public GraphWrapper::NodeMap<T> { 
 
   272       NodeMap(const GraphWrapperSkeleton<GraphWrapper>& _G) :  
 
   273 	GraphWrapper::NodeMap<T>(_G.gw) { }
 
   274       NodeMap(const GraphWrapperSkeleton<GraphWrapper>& _G, T a) : 
 
   275 	GraphWrapper::NodeMap<T>(_G.gw, a) { }
 
   278     template<typename T> class EdgeMap : public GraphWrapper::EdgeMap<T> { 
 
   280       EdgeMap(const GraphWrapperSkeleton<GraphWrapper>& _G) :  
 
   281 	GraphWrapper::EdgeMap<T>(_G.gw) { }
 
   282       EdgeMap(const GraphWrapperSkeleton<GraphWrapper>& _G, T a) : 
 
   283 	GraphWrapper::EdgeMap<T>(_G.gw, a) { }
 
   287 //   template<typename Graph>
 
   288 //   class RevGraphWrapper
 
   294 //     typedef Graph BaseGraph;
 
   296 //     typedef typename Graph::Node Node;    
 
   297 //     typedef typename Graph::NodeIt NodeIt;
 
   299 //     typedef typename Graph::Edge Edge;
 
   300 //     typedef typename Graph::OutEdgeIt InEdgeIt;
 
   301 //     typedef typename Graph::InEdgeIt OutEdgeIt;
 
   302 //     //typedef typename Graph::SymEdgeIt SymEdgeIt;
 
   303 //     typedef typename Graph::EdgeIt EdgeIt;
 
   305 //     //RevGraphWrapper() : graph(0) { }
 
   306 //     RevGraphWrapper(Graph& _graph) : graph(&_graph) { }
 
   308 //     void setGraph(Graph& _graph) { graph = &_graph; }
 
   309 //     Graph& getGraph() const { return (*graph); }
 
   311 //     template<typename I> I& first(I& i) const { return graph->first(i); }
 
   312 //     template<typename I, typename P> I& first(I& i, const P& p) const { 
 
   313 //       return graph->first(i, p); }
 
   315 //     template<typename I> I getNext(const I& i) const { 
 
   316 //       return graph->getNext(i); }
 
   317 //     template<typename I> I& next(I &i) const { return graph->next(i); }    
 
   319 //     template< typename It > It first() const { 
 
   320 //       It e; first(e); return e; }
 
   322 //     template< typename It > It first(const Node& v) const { 
 
   323 //       It e; first(e, v); return e; }
 
   325 //     Node head(const Edge& e) const { return graph->tail(e); }
 
   326 //     Node tail(const Edge& e) const { return graph->head(e); }
 
   328 //     template<typename I> bool valid(const I& i) const 
 
   329 //       { return graph->valid(i); }
 
   331 //     //template<typename I> void setInvalid(const I &i);
 
   332 //     //{ return graph->setInvalid(i); }
 
   334 //     template<typename I> Node aNode(const I& e) const { 
 
   335 //       return graph->aNode(e); }
 
   336 //     template<typename I> Node bNode(const I& e) const { 
 
   337 //       return graph->bNode(e); }
 
   339 //     Node addNode() const { return graph->addNode(); }
 
   340 //     Edge addEdge(const Node& tail, const Node& head) const { 
 
   341 //       return graph->addEdge(tail, head); }
 
   343 //     int nodeNum() const { return graph->nodeNum(); }
 
   344 //     int edgeNum() const { return graph->edgeNum(); }
 
   346 //     template<typename I> void erase(const I& i) const { graph->erase(i); }
 
   348 //     void clear() const { graph->clear(); }
 
   350 //     template<typename T> class NodeMap : public Graph::NodeMap<T> { 
 
   352 //       NodeMap(const RevGraphWrapper<Graph>& _G) : 
 
   353 // 	Graph::NodeMap<T>(_G.getGraph()) { }
 
   354 //       NodeMap(const RevGraphWrapper<Graph>& _G, T a) : 
 
   355 // 	Graph::NodeMap<T>(_G.getGraph(), a) { }
 
   358 //     template<typename T> class EdgeMap : public Graph::EdgeMap<T> { 
 
   360 //       EdgeMap(const RevGraphWrapper<Graph>& _G) : 
 
   361 // 	Graph::EdgeMap<T>(_G.getGraph()) { }
 
   362 //       EdgeMap(const RevGraphWrapper<Graph>& _G, T a) : 
 
   363 // 	Graph::EdgeMap<T>(_G.getGraph(), a) { }
 
   367 //   template<typename /*Graph*/GraphWrapper
 
   368 //   /*=typename GraphWrapperSkeleton< TrivGraphWrapper<Graph>*/ >
 
   369 //   class RevGraphWrapper : 
 
   370 //     public GraphWrapper/*GraphWrapperSkeleton< TrivGraphWrapper<Graph> >*/ {
 
   375 //     //typedef Graph BaseGraph;
 
   377 //     //typedef typename Graph::Node Node;    
 
   378 //     //typedef typename Graph::NodeIt NodeIt;
 
   380 //     //typedef typename Graph::Edge Edge;
 
   381 //     typedef typename GraphWrapper/*typename GraphWrapperSkeleton< TrivGraphWrapper<Graph> >*/::OutEdgeIt InEdgeIt;
 
   382 //     typedef typename GraphWrapper/*typename GraphWrapperSkeleton< TrivGraphWrapper<Graph> >*/::InEdgeIt OutEdgeIt;
 
   383 //     //typedef typename Graph::SymEdgeIt SymEdgeIt;
 
   384 //     //typedef typename Graph::EdgeIt EdgeIt;
 
   386 //     //RevGraphWrapper() : graph(0) { }
 
   387 //     RevGraphWrapper(GraphWrapper _gw/*BaseGraph& _graph*/) : GraphWrapper/*GraphWrapperSkeleton< TrivGraphWrapper<Graph> >*/(_gw/*TrivGraphWrapper<Graph>(_graph)*/) { }
 
   389 //     //void setGraph(Graph& _graph) { graph = &_graph; }
 
   390 //     //Graph& getGraph() const { return (*graph); }
 
   392 //     //template<typename I> I& first(I& i) const { return graph->first(i); }
 
   393 //     //template<typename I, typename P> I& first(I& i, const P& p) const { 
 
   394 //     //  return graph->first(i, p); }
 
   396 //     //template<typename I> I getNext(const I& i) const { 
 
   397 //     //  return graph->getNext(i); }
 
   398 //     //template<typename I> I& next(I &i) const { return graph->next(i); }    
 
   400 //     //template< typename It > It first() const { 
 
   401 //     //  It e; first(e); return e; }
 
   403 //     //template< typename It > It first(const Node& v) const { 
 
   404 //     //  It e; first(e, v); return e; }
 
   406 //     //Node head(const Edge& e) const { return graph->tail(e); }
 
   407 //     //Node tail(const Edge& e) const { return graph->head(e); }
 
   409 //     //template<typename I> bool valid(const I& i) const 
 
   410 //     //  { return graph->valid(i); }
 
   412 //     //template<typename I> void setInvalid(const I &i);
 
   413 //     //{ return graph->setInvalid(i); }
 
   415 //     //template<typename I> Node aNode(const I& e) const { 
 
   416 //     //  return graph->aNode(e); }
 
   417 //     //template<typename I> Node bNode(const I& e) const { 
 
   418 //     //  return graph->bNode(e); }
 
   420 //     //Node addNode() const { return graph->addNode(); }
 
   421 //     //Edge addEdge(const Node& tail, const Node& head) const { 
 
   422 //     //  return graph->addEdge(tail, head); }
 
   424 //     //int nodeNum() const { return graph->nodeNum(); }
 
   425 //     //int edgeNum() const { return graph->edgeNum(); }
 
   427 //     //template<typename I> void erase(const I& i) const { graph->erase(i); }
 
   429 //     //void clear() const { graph->clear(); }
 
   431 //     template<typename T> class NodeMap : 
 
   432 //       public GraphWrapper/*Skeleton< TrivGraphWrapper<Graph> >*/::NodeMap<T> 
 
   435 //       NodeMap(const RevGraphWrapper<GraphWrapper>& _gw) : 
 
   436 // 	GraphWrapper/*Skeleton< TrivGraphWrapper<Graph> >*/::NodeMap<T>(_gw) { }
 
   437 //       NodeMap(const RevGraphWrapper<GraphWrapper>& _gw, T a) : 
 
   438 // 	GraphWrapper/*Skeleton< TrivGraphWrapper<Graph> >*/::NodeMap<T>(_gw, a) { }
 
   441 //     template<typename T> class EdgeMap : 
 
   442 //       public GraphWrapper/*Skeleton< TrivGraphWrapper<Graph> >*/::EdgeMap<T> { 
 
   444 //       EdgeMap(const RevGraphWrapper<GraphWrapper>& _gw) : 
 
   445 // 	GraphWrapper/*Skeleton< TrivGraphWrapper<Graph> >*/::EdgeMap<T>(_gw) { }
 
   446 //       EdgeMap(const RevGraphWrapper<GraphWrapper>& _gw, T a) : 
 
   447 // 	GraphWrapper/*Skeleton< TrivGraphWrapper<Graph> >*/::EdgeMap<T>(_gw, a) { }
 
   451   template<typename GraphWrapper>
 
   452   class RevGraphWrapper : public GraphWrapperSkeleton<GraphWrapper> {
 
   454     typedef typename GraphWrapperSkeleton<GraphWrapper>::Node Node;
 
   455     typedef typename GraphWrapperSkeleton<GraphWrapper>::Edge Edge;
 
   457     //If GraphWrapper::OutEdgeIt is not defined
 
   458     //and we do not want to use RevGraphWrapper::InEdgeIt,
 
   459     //this won't work, because of typedef
 
   461     //graphs have to define their non-existing iterators to void
 
   462     //Unfortunately all the typedefs are instantiated in templates, 
 
   464     typedef typename GraphWrapperSkeleton<GraphWrapper>::OutEdgeIt InEdgeIt;
 
   465     typedef typename GraphWrapperSkeleton<GraphWrapper>::InEdgeIt OutEdgeIt;
 
   467     RevGraphWrapper(GraphWrapper _gw) : 
 
   468       GraphWrapperSkeleton<GraphWrapper>(_gw) { }  
 
   470     Node head(const Edge& e) const 
 
   471       { return GraphWrapperSkeleton<GraphWrapper>::tail(e); }
 
   472     Node tail(const Edge& e) const 
 
   473       { return GraphWrapperSkeleton<GraphWrapper>::head(e); }
 
   476   //Subgraph on the same node-set and partial edge-set
 
   477   template<typename GraphWrapper, typename EdgeFilterMap>
 
   478   class SubGraphWrapper : public GraphWrapperSkeleton<GraphWrapper> {
 
   480     EdgeFilterMap* filter_map;
 
   482     typedef typename GraphWrapperSkeleton<GraphWrapper>::Node Node;
 
   483     typedef typename GraphWrapperSkeleton<GraphWrapper>::NodeIt NodeIt;
 
   484     typedef typename GraphWrapperSkeleton<GraphWrapper>::Edge Edge;
 
   485     typedef typename GraphWrapperSkeleton<GraphWrapper>::EdgeIt EdgeIt;
 
   486     typedef typename GraphWrapperSkeleton<GraphWrapper>::InEdgeIt InEdgeIt;
 
   487     typedef typename GraphWrapperSkeleton<GraphWrapper>::OutEdgeIt OutEdgeIt;
 
   489     SubGraphWrapper(GraphWrapper _gw, EdgeFilterMap& _filter_map) : 
 
   490       GraphWrapperSkeleton<GraphWrapper>(_gw), filter_map(&_filter_map) { }  
 
   492     template<typename I> I& first(I& i) const { 
 
   494       while (gw.valid(i) && !filter_map->get(i)) { gw.next(i); }
 
   497     template<typename I, typename P> I& first(I& i, const P& p) const { 
 
   499       while (gw.valid(i) && !filter_map->get(i)) { gw.next(i); }
 
   503     //template<typename I> I getNext(const I& i) const { 
 
   504     //  return gw.getNext(i); 
 
   506     template<typename I> I& next(I &i) const { 
 
   508       while (gw.valid(i) && !filter_map->get(i)) { gw.next(i); }
 
   512     template< typename It > It first() const { 
 
   513       It e; this->first(e); return e; }
 
   515     template< typename It > It first(const Node& v) const { 
 
   516       It e; this->first(e, v); return e; }
 
   519 //   template<typename GraphWrapper>
 
   520 //   class UndirGraphWrapper {
 
   526 //     typedef GraphWrapper BaseGraph;
 
   528 //     typedef typename GraphWrapper::Node Node;
 
   529 //     typedef typename GraphWrapper::NodeIt NodeIt;
 
   531 //     //typedef typename Graph::Edge Edge;
 
   532 //     //typedef typename Graph::OutEdgeIt OutEdgeIt;
 
   533 //     //typedef typename Graph::InEdgeIt InEdgeIt;
 
   534 //     //typedef typename Graph::SymEdgeIt SymEdgeIt;
 
   535 //     //typedef typename Graph::EdgeIt EdgeIt;
 
   538 //     typedef typename GraphWrapper::Edge GraphEdge;
 
   539 //     typedef typename GraphWrapper::OutEdgeIt GraphOutEdgeIt;
 
   540 //     typedef typename GraphWrapper::InEdgeIt GraphInEdgeIt;
 
   543 //     //UndirGraphWrapper() : graph(0) { }
 
   544 //     UndirGraphWrapper(GraphWrapper _gw) : gw(_gw) { }
 
   546 //     //void setGraph(Graph& _graph) { graph = &_graph; }
 
   547 //     //Graph& getGraph() const { return (*graph); }
 
   550 //       friend class UndirGraphWrapper<GraphWrapper>;
 
   551 //       bool out_or_in; //true iff out
 
   552 //       GraphOutEdgeIt out;
 
   555 //       Edge() : out_or_in(), out(), in() { }
 
   556 //       Edge(const Invalid& i) : out_or_in(false), out(), in(i) { }
 
   557 //       operator GraphEdge() const {
 
   558 // 	if (out_or_in) return(out); else return(in);
 
   560 //       friend bool operator==(const Edge& u, const Edge& v) { 
 
   562 // 	  return (u.out_or_in && u.out==v.out);
 
   564 // 	  return (!u.out_or_in && u.in==v.in);
 
   566 //       friend bool operator!=(const Edge& u, const Edge& v) { 
 
   568 // 	  return (!u.out_or_in || u.out!=v.out);
 
   570 // 	  return (u.out_or_in || u.in!=v.in);
 
   574 //     class OutEdgeIt : public Edge {
 
   575 //       friend class UndirGraphWrapper<GraphWrapper>;
 
   577 //       OutEdgeIt() : Edge() { }
 
   578 //       OutEdgeIt(const Invalid& i) : Edge(i) { }
 
   579 //       OutEdgeIt(const UndirGraphWrapper<GraphWrapper>& _G, const Node& n) 
 
   582 // 	_G.gw.first(out, n);
 
   583 // 	if (!(_G.gw.valid(out))) {
 
   585 // 	  _G.gw.first(in, n);
 
   590 //     OutEdgeIt& first(OutEdgeIt& e, const Node& n) const {
 
   592 //       gw.first(e.out, n);
 
   593 //       if (!(gw.valid(e.out))) {
 
   594 // 	e.out_or_in=false;
 
   595 // 	gw.first(e.in, n);
 
   600 //     OutEdgeIt& next(OutEdgeIt& e) const {
 
   601 //       if (e.out_or_in) {
 
   602 // 	Node n=gw.tail(e.out);
 
   604 // 	if (!gw.valid(e.out)) {
 
   605 // 	  e.out_or_in=false;
 
   606 // 	  gw.first(e.in, n);
 
   614 //     Node aNode(const OutEdgeIt& e) const { 
 
   615 //       if (e.out_or_in) return gw.tail(e); else return gw.head(e); }
 
   616 //     Node bNode(const OutEdgeIt& e) const { 
 
   617 //       if (e.out_or_in) return gw.head(e); else return gw.tail(e); }
 
   619 //     typedef OutEdgeIt InEdgeIt; 
 
   621 //     template<typename I> I& first(I& i) const { return gw.first(i); }
 
   622 // //     template<typename I, typename P> I& first(I& i, const P& p) const { 
 
   623 // //       return graph->first(i, p); }
 
   625 //     template<typename I> I getNext(const I& i) const { 
 
   626 //       return gw.getNext(i); }
 
   627 //     template<typename I> I& next(I &i) const { return gw.next(i); }    
 
   629 //     template< typename It > It first() const { 
 
   630 //       It e; first(e); return e; }
 
   632 //     template< typename It > It first(const Node& v) const { 
 
   633 //       It e; first(e, v); return e; }
 
   635 //     Node head(const Edge& e) const { return gw.head(e); }
 
   636 //     Node tail(const Edge& e) const { return gw.tail(e); }
 
   638 //     template<typename I> bool valid(const I& i) const 
 
   639 //       { return gw.valid(i); }
 
   641 //     //template<typename I> void setInvalid(const I &i);
 
   642 //     //{ return graph->setInvalid(i); }
 
   644 //     int nodeNum() const { return gw.nodeNum(); }
 
   645 //     int edgeNum() const { return gw.edgeNum(); }
 
   647 // //     template<typename I> Node aNode(const I& e) const { 
 
   648 // //       return graph->aNode(e); }
 
   649 // //     template<typename I> Node bNode(const I& e) const { 
 
   650 // //       return graph->bNode(e); }
 
   652 //     Node addNode() const { return gw.addNode(); }
 
   653 // // FIXME: ez igy nem jo, mert nem
 
   654 // //    Edge addEdge(const Node& tail, const Node& head) const { 
 
   655 // //      return graph->addEdge(tail, head); }
 
   657 //     template<typename I> void erase(const I& i) const { gw.erase(i); }
 
   659 //     void clear() const { gw.clear(); }
 
   661 //     template<typename T> class NodeMap : public GraphWrapper::NodeMap<T> { 
 
   663 //       NodeMap(const UndirGraphWrapper<GraphWrapper>& _G) : 
 
   664 // 	GraphWrapper::NodeMap<T>(_G.gw) { }
 
   665 //       NodeMap(const UndirGraphWrapper<GraphWrapper>& _G, T a) : 
 
   666 // 	GraphWrapper::NodeMap<T>(_G.gw, a) { }
 
   669 //     template<typename T> class EdgeMap : public GraphWrapper::EdgeMap<T> { 
 
   671 //       EdgeMap(const UndirGraphWrapper<GraphWrapper>& _G) : 
 
   672 // 	GraphWrapper::EdgeMap<T>(_G.gw) { }
 
   673 //       EdgeMap(const UndirGraphWrapper<GraphWrapper>& _G, T a) : 
 
   674 // 	GraphWrapper::EdgeMap<T>(_G.gw, a) { }
 
   679   template<typename GraphWrapper>
 
   680   class UndirGraphWrapper : public GraphWrapperSkeleton<GraphWrapper> {
 
   685     //typedef GraphWrapper BaseGraph;
 
   687     typedef typename GraphWrapperSkeleton<GraphWrapper>::Node Node;
 
   688     typedef typename GraphWrapperSkeleton<GraphWrapper>::NodeIt NodeIt;
 
   691     //FIXME ezeknek valojaban a GraphWrapper megfelelo dolgai kellene hogy 
 
   692     //legyenek, at kell irni
 
   693     typedef typename /*GraphWrapperSkeleton<GraphWrapper>*/
 
   694     GraphWrapper::Edge GraphEdge;
 
   695     typedef typename /*GraphWrapperSkeleton<GraphWrapper>*/ 
 
   696     GraphWrapper::OutEdgeIt GraphOutEdgeIt;
 
   697     typedef typename /*GraphWrapperSkeleton<GraphWrapper>*/ 
 
   698     GraphWrapper::InEdgeIt GraphInEdgeIt;
 
   701     //UndirGraphWrapper() : graph(0) { }
 
   702     UndirGraphWrapper(GraphWrapper _gw) : 
 
   703       GraphWrapperSkeleton<GraphWrapper>(_gw) { }  
 
   705     //UndirGraphWrapper(GraphWrapper _gw) : gw(_gw) { }
 
   707     //void setGraph(Graph& _graph) { graph = &_graph; }
 
   708     //Graph& getGraph() const { return (*graph); }
 
   711       friend class UndirGraphWrapper<GraphWrapper>;
 
   713       bool out_or_in; //true iff out
 
   717       Edge() : out_or_in(), out(), in() { }
 
   718       Edge(const Invalid& i) : out_or_in(false), out(), in(i) { }
 
   719       operator GraphEdge() const {
 
   720 	if (out_or_in) return(out); else return(in);
 
   723 //2 edges are equal if they "refer" to the same physical edge 
 
   725       friend bool operator==(const Edge& u, const Edge& v) { 
 
   727 	  if (u.out_or_in) return (u.out==v.out); else return (u.out==v.in);
 
   728 	//return (u.out_or_in && u.out==v.out);
 
   730 	  if (u.out_or_in) return (u.out==v.in); else return (u.in==v.in);
 
   731 	//return (!u.out_or_in && u.in==v.in);
 
   733       friend bool operator!=(const Edge& u, const Edge& v) { 
 
   735 	  if (u.out_or_in) return (u.out!=v.out); else return (u.out!=v.in);
 
   736 	//return (!u.out_or_in || u.out!=v.out);
 
   738 	  if (u.out_or_in) return (u.out!=v.in); else return (u.in!=v.in);
 
   739 	//return (u.out_or_in || u.in!=v.in);
 
   743     class OutEdgeIt : public Edge {
 
   744       friend class UndirGraphWrapper<GraphWrapper>;
 
   746       OutEdgeIt() : Edge() { }
 
   747       OutEdgeIt(const Invalid& i) : Edge(i) { }
 
   748       OutEdgeIt(const UndirGraphWrapper<GraphWrapper>& _G, const Node& n) 
 
   750 	out_or_in=true; _G.gw.first(out, n);
 
   751 	if (!(_G.gw.valid(out))) { out_or_in=false; _G.gw.first(in, n);	}
 
   755     typedef OutEdgeIt InEdgeIt; 
 
   757     class EdgeIt : public Edge {
 
   758       friend class UndirGraphWrapper<GraphWrapper>;
 
   762       EdgeIt() : Edge() { }
 
   763       EdgeIt(const Invalid& i) : Edge(i) { }
 
   764       EdgeIt(const UndirGraphWrapper<GraphWrapper>& _G) 
 
   769 	if (_G.valid(v)) _G.gw.first(out); else out=INVALID;
 
   770 	while (_G.valid(v) && !_G.gw.valid(out)) { 
 
   772 	  if (_G.valid(v)) _G.gw.first(out); 
 
   777     OutEdgeIt& first(OutEdgeIt& e, const Node& n) const {
 
   778       e.out_or_in=true; gw.first(e.out, n);
 
   779       if (!(gw.valid(e.out))) { e.out_or_in=false; gw.first(e.in, n); }
 
   783     EdgeIt& first(EdgeIt& e) const {
 
   787       if (valid(e.v)) gw.first(e.out, e.v); else e.out=INVALID;
 
   788       while (valid(e.v) && !gw.valid(e.out)) { 
 
   790 	if (valid(e.v)) gw.first(e.out, e.v); 
 
   795     template<typename I> I& first(I& i) const { gw.first(i); return i; }
 
   796     template<typename I, typename P> I& first(I& i, const P& p) const { 
 
   797       gw.first(i, p); return i; }
 
   799     OutEdgeIt& next(OutEdgeIt& e) const {
 
   801 	Node n=gw.tail(e.out);
 
   803 	if (!gw.valid(e.out)) { e.out_or_in=false; gw.first(e.in, n); }
 
   810     EdgeIt& next(EdgeIt& e) const {
 
   813       while (valid(e.v) && !gw.valid(e.out)) { 
 
   815 	if (valid(e.v)) gw.first(e.out, e.v); 
 
   820     template<typename I> I& next(I &i) const { return gw.next(i); }    
 
   821 //    template<typename I> I getNext(const I& i) const { return gw.getNext(i); }
 
   823     template< typename It > It first() const { 
 
   824       It e; first(e); return e; }
 
   826     template< typename It > It first(const Node& v) const { 
 
   827       It e; first(e, v); return e; }
 
   829 //    Node head(const Edge& e) const { return gw.head(e); }
 
   830 //    Node tail(const Edge& e) const { return gw.tail(e); }
 
   832 //    template<typename I> bool valid(const I& i) const 
 
   833 //      { return gw.valid(i); }
 
   835 //    int nodeNum() const { return gw.nodeNum(); }
 
   836 //    int edgeNum() const { return gw.edgeNum(); }
 
   838 //     template<typename I> Node aNode(const I& e) const { 
 
   839 //       return graph->aNode(e); }
 
   840 //     template<typename I> Node bNode(const I& e) const { 
 
   841 //       return graph->bNode(e); }
 
   843     Node aNode(const OutEdgeIt& e) const { 
 
   844       if (e.out_or_in) return gw.tail(e); else return gw.head(e); }
 
   845     Node bNode(const OutEdgeIt& e) const { 
 
   846       if (e.out_or_in) return gw.head(e); else return gw.tail(e); }
 
   848 //    Node addNode() const { return gw.addNode(); }
 
   850 // FIXME: ez igy nem jo, mert nem
 
   851 //    Edge addEdge(const Node& tail, const Node& head) const { 
 
   852 //      return graph->addEdge(tail, head); }
 
   854 //    template<typename I> void erase(const I& i) const { gw.erase(i); }
 
   856 //    void clear() const { gw.clear(); }
 
   858 //     template<typename T> class NodeMap : public GraphWrapper::NodeMap<T> { 
 
   860 //       NodeMap(const UndirGraphWrapper<GraphWrapper>& _G) : 
 
   861 // 	GraphWrapper::NodeMap<T>(_G.gw) { }
 
   862 //       NodeMap(const UndirGraphWrapper<GraphWrapper>& _G, T a) : 
 
   863 // 	GraphWrapper::NodeMap<T>(_G.gw, a) { }
 
   866 //     template<typename T> class EdgeMap : 
 
   867 //       public GraphWrapperSkeleton<GraphWrapper>::EdgeMap<T> { 
 
   869 //       EdgeMap(const UndirGraphWrapper<GraphWrapper>& _G) : 
 
   870 // 	GraphWrapperSkeleton<GraphWrapper>::EdgeMap<T>(_G.gw) { }
 
   871 //       EdgeMap(const UndirGraphWrapper<GraphWrapper>& _G, T a) : 
 
   872 // 	GraphWrapper::EdgeMap<T>(_G.gw, a) { }
 
   880 //   template<typename Graph>
 
   881 //   class SymGraphWrapper
 
   886 //     typedef Graph BaseGraph;
 
   888 //     typedef typename Graph::Node Node;
 
   889 //     typedef typename Graph::Edge Edge;
 
   891 //     typedef typename Graph::NodeIt NodeIt;
 
   893 //     //FIXME tag-ekkel megcsinalni, hogy abbol csinaljon
 
   894 //     //iranyitatlant, ami van
 
   895 //     //mert csak 1 dolgot lehet be typedef-elni
 
   896 //     typedef typename Graph::OutEdgeIt SymEdgeIt;
 
   897 //     //typedef typename Graph::InEdgeIt SymEdgeIt;
 
   898 //     //typedef typename Graph::SymEdgeIt SymEdgeIt;
 
   899 //     typedef typename Graph::EdgeIt EdgeIt;
 
   901 //     int nodeNum() const { return graph->nodeNum(); }
 
   902 //     int edgeNum() const { return graph->edgeNum(); }
 
   904 //     template<typename I> I& first(I& i) const { return graph->first(i); }
 
   905 //     template<typename I, typename P> I& first(I& i, const P& p) const { 
 
   906 //       return graph->first(i, p); }
 
   907 //     //template<typename I> I next(const I i); { return graph->goNext(i); }
 
   908 //     //template<typename I> I &goNext(I &i); { return graph->goNext(i); }
 
   910 //     template< typename It > It first() const { 
 
   911 //       It e; first(e); return e; }
 
   913 //     template< typename It > It first(Node v) const { 
 
   914 //       It e; first(e, v); return e; }
 
   916 //     Node head(const Edge& e) const { return graph->head(e); }
 
   917 //     Node tail(const Edge& e) const { return graph->tail(e); }
 
   919 //     template<typename I> Node aNode(const I& e) const { 
 
   920 //       return graph->aNode(e); }
 
   921 //     template<typename I> Node bNode(const I& e) const { 
 
   922 //       return graph->bNode(e); }
 
   924 //     //template<typename I> bool valid(const I i);
 
   925 //     //{ return graph->valid(i); }
 
   927 //     //template<typename I> void setInvalid(const I &i);
 
   928 //     //{ return graph->setInvalid(i); }
 
   930 //     Node addNode() { return graph->addNode(); }
 
   931 //     Edge addEdge(const Node& tail, const Node& head) { 
 
   932 //       return graph->addEdge(tail, head); }
 
   934 //     template<typename I> void erase(const I& i) { graph->erase(i); }
 
   936 //     void clear() { graph->clear(); }
 
   938 //     template<typename T> class NodeMap : public Graph::NodeMap<T> { };
 
   939 //     template<typename T> class EdgeMap : public Graph::EdgeMap<T> { };
 
   941 //     void setGraph(Graph& _graph) { graph = &_graph; }
 
   942 //     Graph& getGraph() { return (*graph); }
 
   944 //     //SymGraphWrapper() : graph(0) { }
 
   945 //     SymGraphWrapper(Graph& _graph) : graph(&_graph) { }
 
   949   template<typename GraphWrapper, typename Number, typename FlowMap, typename CapacityMap>
 
   950   class ResGraphWrapper : public GraphWrapperSkeleton<GraphWrapper>{
 
   952     //typedef Graph BaseGraph;
 
   953     //typedef TrivGraphWrapper<const Graph> GraphWrapper;
 
   954     typedef typename GraphWrapperSkeleton<GraphWrapper>::Node Node;
 
   955     typedef typename GraphWrapperSkeleton<GraphWrapper>::NodeIt NodeIt;
 
   957     typedef typename /*GraphWrapperSkeleton<GraphWrapper>*/
 
   958     GraphWrapper::OutEdgeIt OldOutEdgeIt;
 
   959     typedef typename /*GraphWrapperSkeleton<GraphWrapper>*/
 
   960     GraphWrapper::InEdgeIt OldInEdgeIt;
 
   962     //const Graph* graph;
 
   965     const CapacityMap* capacity;
 
   968     ResGraphWrapper(const GraphWrapper& _gw, FlowMap& _flow, 
 
   969 		    const CapacityMap& _capacity) : 
 
   970       GraphWrapperSkeleton<GraphWrapper>(_gw), 
 
   971       flow(&_flow), capacity(&_capacity) { }
 
   973     //void setGraph(const Graph& _graph) { graph = &_graph; }
 
   974     //const Graph& getGraph() const { return (*graph); }
 
   979     friend class OutEdgeIt; 
 
   982       friend class ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>;
 
   984       bool out_or_in; //true, iff out
 
   988       Edge() : out_or_in(true) { } 
 
   989       Edge(const Invalid& i) : out_or_in(false), out(), in(i) { }
 
   990 //       bool valid() const { 
 
   991 // 	return out_or_in && out.valid() || in.valid(); }
 
   992       friend bool operator==(const Edge& u, const Edge& v) { 
 
   994 	  return (u.out_or_in && u.out==v.out);
 
   996 	  return (!u.out_or_in && u.in==v.in);
 
   998       friend bool operator!=(const Edge& u, const Edge& v) { 
 
  1000 	  return (!u.out_or_in || u.out!=v.out);
 
  1002 	  return (u.out_or_in || u.in!=v.in);
 
  1007     class OutEdgeIt : public Edge {
 
  1008       friend class ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>;
 
  1012       OutEdgeIt(const Edge& e) : Edge(e) { }
 
  1013       OutEdgeIt(const Invalid& i) : Edge(i) { }
 
  1015       OutEdgeIt(const ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>& resG, Node v) : Edge() { 
 
  1016 	resG.gw.first(out, v);
 
  1017 	while( resG.gw.valid(out) && !(resG.resCap(out)>0) ) { resG.gw.next(out); }
 
  1018 	if (!resG.gw.valid(out)) {
 
  1020 	  resG.gw.first(in, v);
 
  1021 	  while( resG.gw.valid(in) && !(resG.resCap(in)>0) ) { resG.gw.next(in); }
 
  1025 //       OutEdgeIt& operator++() { 
 
  1027 // 	  Node v=/*resG->*/G->aNode(out);
 
  1029 // 	  while( out.valid() && !(Edge::resCap()>0) ) { ++out; }
 
  1030 // 	  if (!out.valid()) {
 
  1033 // 	    while( in.valid() && !(Edge::resCap()>0) ) { ++in; }
 
  1037 // 	  while( in.valid() && !(Edge::resCap()>0) ) { ++in; } 
 
  1043     //FIXME This is just for having InEdgeIt
 
  1044     typedef void InEdgeIt;
 
  1046     class EdgeIt : public Edge {
 
  1047       friend class ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>;
 
  1051       //EdgeIt(const EdgeIt& e) : Edge(e), v(e.v) { }
 
  1052       EdgeIt(const Invalid& i) : Edge(i) { }
 
  1053       EdgeIt(const ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>& resG) : Edge() { 
 
  1055 	if (resG.gw.valid(v)) resG.gw.first(out, v); else out=INVALID;
 
  1056 	while (resG.gw.valid(out) && !(resG.resCap(out)>0) ) { resG.gw.next(out); }
 
  1057 	while (resG.gw.valid(v) && !resG.gw.valid(out)) { 
 
  1059 	  if (resG.gw.valid(v)) resG.gw.first(out, v); 
 
  1060 	  while (resG.gw.valid(out) && !(resG.resCap(out)>0) ) { resG.gw.next(out); }
 
  1062 	if (!resG.gw.valid(out)) {
 
  1065 	  if (resG.gw.valid(v)) resG.gw.first(in, v); else in=INVALID;
 
  1066 	  while (resG.gw.valid(in) && !(resG.resCap(in)>0) ) { resG.gw.next(in); }
 
  1067 	  while (resG.gw.valid(v) && !resG.gw.valid(in)) { 
 
  1069 	    if (resG.gw.valid(v)) resG.gw.first(in, v); 
 
  1070 	    while (resG.gw.valid(in) && !(resG.resCap(in)>0) ) { resG.gw.next(in); }
 
  1074 //       EdgeIt& operator++() { 
 
  1077 // 	  while (out.valid() && !(Edge::resCap()>0) ) { ++out; }
 
  1078 // 	  while (v.valid() && !out.valid()) { 
 
  1080 // 	    if (v.valid()) G->first(out, v); 
 
  1081 // 	    while (out.valid() && !(Edge::resCap()>0) ) { ++out; }
 
  1083 // 	  if (!out.valid()) {
 
  1086 // 	    if (v.valid()) G->first(in, v); else in=OldInEdgeIt();
 
  1087 // 	    while (in.valid() && !(Edge::resCap()>0) ) { ++in; }
 
  1088 // 	    while (v.valid() && !in.valid()) { 
 
  1090 // 	      if (v.valid()) G->first(in, v); 
 
  1091 // 	      while (in.valid() && !(Edge::resCap()>0) ) { ++in; }
 
  1096 // 	  while (in.valid() && !(Edge::resCap()>0) ) { ++in; }
 
  1097 // 	  while (v.valid() && !in.valid()) { 
 
  1099 // 	    if (v.valid()) G->first(in, v); 
 
  1100 // 	    while (in.valid() && !(Edge::resCap()>0) ) { ++in; }
 
  1107     NodeIt& first(NodeIt& v) const { gw.first(v); return v; }
 
  1108     OutEdgeIt& first(OutEdgeIt& e, Node v) const { 
 
  1109       e=OutEdgeIt(*this, v); 
 
  1112     EdgeIt& first(EdgeIt& e) const { 
 
  1117     NodeIt& next(NodeIt& n) const { return gw.next(n); }
 
  1119     OutEdgeIt& next(OutEdgeIt& e) const { 
 
  1121 	Node v=gw.aNode(e.out);
 
  1123 	while( gw.valid(e.out) && !(resCap(e.out)>0) ) { gw.next(e.out); }
 
  1124 	if (!gw.valid(e.out)) {
 
  1127 	  while( gw.valid(e.in) && !(resCap(e.in)>0) ) { gw.next(e.in); }
 
  1131 	while( gw.valid(e.in) && !(resCap(e.in)>0) ) { gw.next(e.in); } 
 
  1136     EdgeIt& next(EdgeIt& e) const { 
 
  1139 	while (gw.valid(e.out) && !(resCap(e.out)>0) ) { gw.next(e.out); }
 
  1140 	  while (gw.valid(e.v) && !gw.valid(e.out)) { 
 
  1142 	    if (gw.valid(e.v)) gw.first(e.out, e.v); 
 
  1143 	    while (gw.valid(e.out) && !(resCap(e.out)>0) ) { gw.next(e.out); }
 
  1145 	  if (!gw.valid(e.out)) {
 
  1148 	    if (gw.valid(e.v)) gw.first(e.in, e.v); else e.in=INVALID;
 
  1149 	    while (gw.valid(e.in) && !(resCap(e.in)>0) ) { gw.next(e.in); }
 
  1150 	    while (gw.valid(e.v) && !gw.valid(e.in)) { 
 
  1152 	      if (gw.valid(e.v)) gw.first(e.in, e.v); 
 
  1153 	      while (gw.valid(e.in) && !(resCap(e.in)>0) ) { gw.next(e.in); }
 
  1158 	  while (gw.valid(e.in) && !(resCap(e.in)>0) ) { gw.next(e.in); }
 
  1159 	  while (gw.valid(e.v) && !gw.valid(e.in)) { 
 
  1161 	    if (gw.valid(e.v)) gw.first(e.in, e.v); 
 
  1162 	    while (gw.valid(e.in) && !(resCap(e.in)>0) ) { gw.next(e.in); }
 
  1169     template< typename It >
 
  1176     template< typename It >
 
  1177     It first(Node v) const { 
 
  1183     Node tail(Edge e) const { 
 
  1184       return ((e.out_or_in) ? gw.aNode(e.out) : gw.aNode(e.in)); }
 
  1185     Node head(Edge e) const { 
 
  1186       return ((e.out_or_in) ? gw.bNode(e.out) : gw.bNode(e.in)); }
 
  1188     Node aNode(OutEdgeIt e) const { 
 
  1189       return ((e.out_or_in) ? gw.aNode(e.out) : gw.aNode(e.in)); }
 
  1190     Node bNode(OutEdgeIt e) const { 
 
  1191       return ((e.out_or_in) ? gw.bNode(e.out) : gw.bNode(e.in)); }
 
  1193     int nodeNum() const { return gw.nodeNum(); }
 
  1195     //int edgeNum() const { return gw.edgeNum(); }
 
  1198     int id(Node v) const { return gw.id(v); }
 
  1200     bool valid(Node n) const { return gw.valid(n); }
 
  1201     bool valid(Edge e) const { 
 
  1202       return e.out_or_in ? gw.valid(e.out) : gw.valid(e.in); }
 
  1204     void augment(const Edge& e, Number a) const {
 
  1206 	flow->set(e.out, flow->get(e.out)+a);
 
  1208 	flow->set(e.in, flow->get(e.in)-a);
 
  1211     Number resCap(const Edge& e) const { 
 
  1213 	return (capacity->get(e.out)-flow->get(e.out)); 
 
  1215 	return (flow->get(e.in)); 
 
  1218     Number resCap(OldOutEdgeIt out) const { 
 
  1219       return (capacity->get(out)-flow->get(out)); 
 
  1222     Number resCap(OldInEdgeIt in) const { 
 
  1223       return (flow->get(in)); 
 
  1226 //     template<typename T> class NodeMap : public GraphWrapper::NodeMap<T> { 
 
  1228 //       NodeMap(const ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>& _G) 
 
  1229 // 	: GraphWrapper::NodeMap<T>(_G.gw) { }
 
  1230 //       NodeMap(const ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>& _G, 
 
  1231 // 	      T a) : GraphWrapper::NodeMap<T>(_G.gw, a) { }
 
  1234 //     template <typename T>
 
  1236 //       typename Graph::NodeMap<T> node_map; 
 
  1238 //       NodeMap(const ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>& _G) : node_map(*(_G.graph)) { }
 
  1239 //       NodeMap(const ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>& _G, T a) : node_map(*(_G.graph), a) { }
 
  1240 //       void set(Node nit, T a) { node_map.set(nit, a); }
 
  1241 //       T get(Node nit) const { return node_map.get(nit); }
 
  1244     template <typename T>
 
  1246       typename GraphWrapper::EdgeMap<T> forward_map, backward_map; 
 
  1248       EdgeMap(const ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>& _G) : forward_map(_G.gw), backward_map(_G.gw) { }
 
  1249       EdgeMap(const ResGraphWrapper<GraphWrapper, Number, FlowMap, CapacityMap>& _G, T a) : forward_map(_G.gw, a), backward_map(_G.gw, a) { }
 
  1250       void set(Edge e, T a) { 
 
  1252 	  forward_map.set(e.out, a); 
 
  1254 	  backward_map.set(e.in, a); 
 
  1258 	  return forward_map.get(e.out); 
 
  1260 	  return backward_map.get(e.in); 
 
  1265   //Subgraph on the same node-set and partial edge-set
 
  1266   template<typename GraphWrapper, typename FirstOutEdgesMap>
 
  1267   class ErasingFirstGraphWrapper : public GraphWrapperSkeleton<GraphWrapper> {
 
  1269     FirstOutEdgesMap* first_out_edges;
 
  1271     typedef typename GraphWrapperSkeleton<GraphWrapper>::Node Node;
 
  1272     typedef typename GraphWrapperSkeleton<GraphWrapper>::NodeIt NodeIt;
 
  1273     typedef typename GraphWrapperSkeleton<GraphWrapper>::Edge Edge;
 
  1274     typedef typename GraphWrapperSkeleton<GraphWrapper>::EdgeIt EdgeIt;
 
  1275     typedef typename GraphWrapperSkeleton<GraphWrapper>::InEdgeIt InEdgeIt;
 
  1276     typedef typename GraphWrapperSkeleton<GraphWrapper>::OutEdgeIt OutEdgeIt;
 
  1278     ErasingFirstGraphWrapper(GraphWrapper _gw, FirstOutEdgesMap& _first_out_edges) : 
 
  1279       GraphWrapperSkeleton<GraphWrapper>(_gw), first_out_edges(&_first_out_edges) { }  
 
  1281     template<typename I> I& first(I& i) const { 
 
  1283       //while (gw.valid(i) && !filter_map->get(i)) { gw.next(i); }
 
  1286     OutEdgeIt& first(OutEdgeIt& e, const Node& n) const {
 
  1287       e=first_out_edges->get(n);
 
  1290     template<typename I, typename P> I& first(I& i, const P& p) const { 
 
  1292       //while (gw.valid(i) && !filter_map->get(i)) { gw.next(i); }
 
  1296     //template<typename I> I getNext(const I& i) const { 
 
  1297     //  return gw.getNext(i); 
 
  1299     template<typename I> I& next(I &i) const { 
 
  1301       //while (gw.valid(i) && !filter_map->get(i)) { gw.next(i); }
 
  1305     template< typename It > It first() const { 
 
  1306       It e; this->first(e); return e; }
 
  1308     template< typename It > It first(const Node& v) const { 
 
  1309       It e; this->first(e, v); return e; }
 
  1311     void erase(const OutEdgeIt& e) const {
 
  1314       first_out_edges->set(this->tail(e), f);
 
  1318 //   template<typename Graph, typename Number, typename FlowMap, typename CapacityMap>
 
  1319 //   class ErasingResGraphWrapper : public ResGraphWrapper<Graph, Number, FlowMap, CapacityMap> {
 
  1321 //     ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<typename ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::OutEdgeIt> first_out_edges;
 
  1322 //     //ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<int> dist;
 
  1324 //     ErasingResGraphWrapper(const Graph& _G, FlowMap& _flow, 
 
  1325 // 			   const CapacityMap& _capacity) : 
 
  1326 //       ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>(_G, _flow, _capacity), 
 
  1327 //       first_out_edges(*this) /*, dist(*this)*/ { 
 
  1328 //       for(NodeIt n=this->template first<NodeIt>(); this->valid(n); this->next(n)) {
 
  1330 // 	ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::first(e, n);
 
  1331 // 	first_out_edges.set(n, e);
 
  1335 //     //void setGraph(Graph& _graph) { graph = &_graph; }
 
  1336 //     //Graph& getGraph() const { return (*graph); }
 
  1338 //     //TrivGraphWrapper() : graph(0) { }
 
  1339 //     //ErasingResGraphWrapper(Graph& _graph) : graph(&_graph) { }
 
  1341 //     //typedef Graph BaseGraph;
 
  1343 //     //typedef typename Graph::Node Node;
 
  1344 //     //typedef typename Graph::NodeIt NodeIt;
 
  1346 //     //typedef typename Graph::Edge Edge;
 
  1347 //     //typedef typename Graph::OutEdgeIt OutEdgeIt;
 
  1348 //     //typedef typename Graph::InEdgeIt InEdgeIt;
 
  1349 //     //typedef typename Graph::SymEdgeIt SymEdgeIt;
 
  1350 //     //typedef typename Graph::EdgeIt EdgeIt;
 
  1352 //     typedef typename ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::Node Node;
 
  1353 //     typedef typename ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeIt NodeIt;
 
  1355 //     typedef typename ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::Edge Edge;
 
  1356 //     typedef typename ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::OutEdgeIt OutEdgeIt;
 
  1357 //     //typedef typename ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::InEdgeIt InEdgeIt;
 
  1358 //     //typedef typename Graph::SymEdgeIt SymEdgeIt;
 
  1359 //     //typedef typename ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::EdgeIt EdgeIt;
 
  1361 //     NodeIt& first(NodeIt& n) const { 
 
  1362 //       return ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::first(n);
 
  1365 //     OutEdgeIt& first(OutEdgeIt& e, const Node& n) const { 
 
  1366 //       e=first_out_edges.get(n);
 
  1370 //     //ROSSZ template<typename I> I& first(I& i) const { return first(i); }
 
  1371 //     //ROSSZ template<typename I, typename P> I& first(I& i, const P& p) const { 
 
  1372 //     //  return first(i, p); }
 
  1374 //     //template<typename I> I getNext(const I& i) const { 
 
  1375 //     //  return gw.getNext(i); }
 
  1376 //     //template<typename I> I& next(I &i) const { return gw.next(i); }    
 
  1378 //     template< typename It > It first() const { 
 
  1379 //       It e; first(e); return e; }
 
  1381 //     template< typename It > It first(const Node& v) const { 
 
  1382 //       It e; first(e, v); return e; }
 
  1384 //     //Node head(const Edge& e) const { return gw.head(e); }
 
  1385 //     //Node tail(const Edge& e) const { return gw.tail(e); }
 
  1387 //     //template<typename I> bool valid(const I& i) const 
 
  1388 //     //  { return gw.valid(i); }
 
  1390 //     //int nodeNum() const { return gw.nodeNum(); }
 
  1391 //     //int edgeNum() const { return gw.edgeNum(); }
 
  1393 //     //template<typename I> Node aNode(const I& e) const { 
 
  1394 //     //  return gw.aNode(e); }
 
  1395 //     //template<typename I> Node bNode(const I& e) const { 
 
  1396 //     //  return gw.bNode(e); }
 
  1398 //     //Node addNode() const { return gw.addNode(); }
 
  1399 //     //Edge addEdge(const Node& tail, const Node& head) const { 
 
  1400 //     //  return gw.addEdge(tail, head); }
 
  1402 //     //void erase(const OutEdgeIt& e) {
 
  1403 //     //  first_out_edge(this->tail(e))=e;
 
  1405 //     void erase(const Edge& e) {
 
  1408 //       first_out_edges.set(this->tail(e), f);
 
  1410 //     //template<typename I> void erase(const I& i) const { gw.erase(i); }
 
  1412 //     //void clear() const { gw.clear(); }
 
  1414 //     template<typename T> class NodeMap : public ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<T> { 
 
  1416 //       NodeMap(const ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>& _G) : 
 
  1417 // 	ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<T>(_G /*_G.getGraph()*/) { }
 
  1418 //       NodeMap(const ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>& _G, T a) : 
 
  1419 // 	ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<T>(_G /*_G.getGraph()*/, a) { }
 
  1422 //     template<typename T> class EdgeMap : public ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::EdgeMap<T> { 
 
  1424 //       EdgeMap(const ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>& _G) : 
 
  1425 // 	ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::EdgeMap<T>(_G /*_G.getGraph()*/) { }
 
  1426 //       EdgeMap(const ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>& _G, T a) : 
 
  1427 // 	ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::EdgeMap<T>(_G /*_G.getGraph()*/, a) { }
 
  1431 //   template<typename GraphWrapper> 
 
  1432 //   class FilterGraphWrapper {
 
  1435 //   template<typename Graph, typename Number, typename FlowMap, typename CapacityMap>
 
  1436 //   class FilterGraphWrapper<ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap> > : public ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap> {
 
  1441 //     //typedef Graph BaseGraph;
 
  1443 //     typedef typename ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::Node Node;
 
  1444 //     typedef typename ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeIt NodeIt;
 
  1446 //     typedef typename ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::Edge Edge;
 
  1447 //     typedef typename ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::OutEdgeIt OutEdgeIt;
 
  1448 //     //typedef typename ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::InEdgeIt InEdgeIt;
 
  1449 //     //typedef typename Graph::SymEdgeIt SymEdgeIt;
 
  1450 //     typedef typename ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::EdgeIt EdgeIt;
 
  1452 //     //FilterGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<typename ResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::OutEdgeIt> first_out_edges;
 
  1455 //     FilterGraphWrapper(const Graph& _G, FlowMap& _flow, 
 
  1456 // 			   const CapacityMap& _capacity) : 
 
  1457 //       ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>(_G, _flow, _capacity), dist(*this, gw.nodeNum()) { 
 
  1460 //     OutEdgeIt& first(OutEdgeIt& e, const Node& n) const {
 
  1461 //       ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::first(e, n);
 
  1462 //       while (valid(e) && (dist.get(tail(e))/*+1!=*/>=dist.get(head(e)))) 
 
  1463 // 	ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::next(e);
 
  1467 //     NodeIt& next(NodeIt& e) const {
 
  1468 //       return ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::next(e);
 
  1471 //     OutEdgeIt& next(OutEdgeIt& e) const {
 
  1472 //       ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::next(e);
 
  1473 //       while (valid(e) && (dist.get(tail(e))/*+1!*/>=dist.get(head(e)))) 
 
  1474 // 	ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::next(e);
 
  1478 //     NodeIt& first(NodeIt& n) const {
 
  1479 //       return ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::first(n);
 
  1482 //     void erase(const Edge& e) {
 
  1484 //       ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::next(f);
 
  1485 //       while (valid(f) && (dist.get(tail(f))/*+1!=*/>=dist.get(head(f)))) 
 
  1486 // 	ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::next(f);
 
  1487 //       first_out_edges.set(this->tail(e), f);
 
  1490 //     //TrivGraphWrapper() : graph(0) { }
 
  1491 //     //TrivGraphWrapper(Graph& _graph) : graph(&_graph) { }
 
  1493 //     //void setGraph(Graph& _graph) { graph = &_graph; }
 
  1494 //     //Graph& getGraph() const { return (*graph); }
 
  1496 //     //template<typename I> I& first(I& i) const { return gw.first(i); }
 
  1497 //     //template<typename I, typename P> I& first(I& i, const P& p) const { 
 
  1498 //     //  return gw.first(i, p); }
 
  1500 //     //template<typename I> I getNext(const I& i) const { 
 
  1501 //     //  return gw.getNext(i); }
 
  1502 //     //template<typename I> I& next(I &i) const { return gw.next(i); }    
 
  1504 //     template< typename It > It first() const { 
 
  1505 //       It e; first(e); return e; }
 
  1507 //     template< typename It > It first(const Node& v) const { 
 
  1508 //       It e; first(e, v); return e; }
 
  1510 //     //Node head(const Edge& e) const { return gw.head(e); }
 
  1511 //     //Node tail(const Edge& e) const { return gw.tail(e); }
 
  1513 //     //template<typename I> bool valid(const I& i) const 
 
  1514 //     //  { return gw.valid(i); }
 
  1516 //     //template<typename I> void setInvalid(const I &i);
 
  1517 //     //{ return gw.setInvalid(i); }
 
  1519 //     //int nodeNum() const { return gw.nodeNum(); }
 
  1520 //     //int edgeNum() const { return gw.edgeNum(); }
 
  1522 //     //template<typename I> Node aNode(const I& e) const { 
 
  1523 //     //  return gw.aNode(e); }
 
  1524 //     //template<typename I> Node bNode(const I& e) const { 
 
  1525 //     //  return gw.bNode(e); }
 
  1527 //     //Node addNode() const { return gw.addNode(); }
 
  1528 //     //Edge addEdge(const Node& tail, const Node& head) const { 
 
  1529 //     //  return gw.addEdge(tail, head); }
 
  1531 //     //template<typename I> void erase(const I& i) const { gw.erase(i); }
 
  1533 //     //void clear() const { gw.clear(); }
 
  1535 //     template<typename T> class NodeMap : public ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<T> { 
 
  1537 //       NodeMap(const FilterGraphWrapper<ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap> >& _G) : 
 
  1538 // 	ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<T>(_G /*_G.getGraph()*/) { }
 
  1539 //       NodeMap(const FilterGraphWrapper<ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap> >& _G, T a) : 
 
  1540 // 	ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<T>(_G /*_G.getGraph()*/, a) { }
 
  1543 //     template<typename T> class EdgeMap : public ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::EdgeMap<T> { 
 
  1545 //       EdgeMap(const FilterGraphWrapper<ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap> >& _G) : 
 
  1546 // 	ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::EdgeMap<T>(_G /*_G.getGraph()*/) { }
 
  1547 //       EdgeMap(const FilterGraphWrapper<ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap> >& _G, T a) : 
 
  1548 // 	ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::EdgeMap<T>(_G /*_G.getGraph()*/, a) { }
 
  1552 //     ErasingResGraphWrapper<Graph, Number, FlowMap, CapacityMap>::NodeMap<int> dist;
 
  1558 // // FIXME: comparison should be made better!!!
 
  1559 //   template<typename Graph, typename T, typename LowerMap, typename FlowMap, typename UpperMap>
 
  1560 //   class ResGraphWrapper
 
  1565 //     typedef Graph BaseGraph;
 
  1567 //     typedef typename Graph::Node Node;
 
  1568 //     typedef typename Graph::Edge Edge;
 
  1570 //     typedef typename Graph::NodeIt NodeIt;
 
  1572 //     class OutEdgeIt {
 
  1576 //       typename Graph::OutEdgeIt o;
 
  1577 //       typename Graph::InEdgeIt i;   
 
  1583 //       typename Graph::OutEdgeIt o;
 
  1584 //       typename Graph::InEdgeIt i;   
 
  1586 //     typedef typename Graph::SymEdgeIt SymEdgeIt;
 
  1587 //     typedef typename Graph::EdgeIt EdgeIt;
 
  1589 //     int nodeNum() const { return gw.nodeNum(); }
 
  1590 //     int edgeNum() const { return gw.edgeNum(); }
 
  1592 //     Node& first(Node& n) const { return gw.first(n); }
 
  1594 //     // Edge and SymEdge  is missing!!!!
 
  1595 //     // Edge <-> In/OutEdgeIt conversion is missing!!!!
 
  1598 //     OutEdgeIt& first(OutEdgeIt& e, const Node& n) const 
 
  1602 // 	while(gw.valid(e.o) && fmap.get(e.o)>=himap.get(e.o))
 
  1604 // 	if(!gw.valid(e.o)) {
 
  1606 // 	  while(gw.valid(e.i) && fmap.get(e.i)<=lomap.get(e.i))
 
  1612 //   OutEdgeIt &goNext(OutEdgeIt &e)
 
  1614 //   if(gw.valid(e.o)) {
 
  1615 //   while(gw.valid(e.o) && fmap.get(e.o)>=himap.get(e.o))
 
  1617 //   if(gw.valid(e.o)) return e;
 
  1618 //   else gw.first(e.i,e.n);
 
  1621 //   while(gw.valid(e.i) && fmap.get(e.i)<=lomap.get(e.i))
 
  1626 //   OutEdgeIt Next(const OutEdgeIt &e) {OutEdgeIt t(e); return goNext(t);}
 
  1628 //     //bool valid(const OutEdgeIt e) { return gw.valid(e.o)||gw.valid(e.i);}
 
  1631 //     InEdgeIt& first(InEdgeIt& e, const Node& n) const 
 
  1635 // 	while(gw.valid(e.i) && fmap.get(e.i)>=himap.get(e.i))
 
  1637 // 	if(!gw.valid(e.i)) {
 
  1639 // 	  while(gw.valid(e.o) && fmap.get(e.o)<=lomap.get(e.o))
 
  1645 //   InEdgeIt &goNext(InEdgeIt &e)
 
  1647 //   if(gw.valid(e.i)) {
 
  1648 //   while(gw.valid(e.i) && fmap.get(e.i)>=himap.get(e.i))
 
  1650 //   if(gw.valid(e.i)) return e;
 
  1651 //   else gw.first(e.o,e.n);
 
  1654 //   while(gw.valid(e.o) && fmap.get(e.o)<=lomap.get(e.o))
 
  1659 //   InEdgeIt Next(const InEdgeIt &e) {InEdgeIt t(e); return goNext(t);}
 
  1661 //     //bool valid(const InEdgeIt e) { return gw.valid(e.i)||gw.valid(e.o);}
 
  1663 //     //template<typename I> I &goNext(I &i); { return gw.goNext(i); }
 
  1664 //     //template<typename I> I next(const I i); { return gw.goNext(i); }
 
  1666 //     template< typename It > It first() const { 
 
  1667 //       It e; first(e); return e; }
 
  1669 //     template< typename It > It first(Node v) const { 
 
  1670 //       It e; first(e, v); return e; }
 
  1672 //     Node head(const Edge& e) const { return gw.head(e); }
 
  1673 //     Node tail(const Edge& e) const { return gw.tail(e); }
 
  1675 //     template<typename I> Node aNode(const I& e) const { 
 
  1676 //       return gw.aNode(e); }
 
  1677 //     template<typename I> Node bNode(const I& e) const { 
 
  1678 //       return gw.bNode(e); }
 
  1680 //     //template<typename I> bool valid(const I i);
 
  1681 //     //{ return gw.valid(i); }
 
  1683 //     //template<typename I> void setInvalid(const I &i);
 
  1684 //     //{ return gw.setInvalid(i); }
 
  1686 //     Node addNode() { return gw.addNode(); }
 
  1687 //     Edge addEdge(const Node& tail, const Node& head) { 
 
  1688 //       return gw.addEdge(tail, head); }
 
  1690 //     template<typename I> void erase(const I& i) { gw.erase(i); }
 
  1692 //     void clear() { gw.clear(); }
 
  1694 //     template<typename S> class NodeMap : public Graph::NodeMap<S> { };
 
  1695 //     template<typename S> class EdgeMap : public Graph::EdgeMap<S> { };
 
  1697 //     void setGraph(Graph& _graph) { graph = &_graph; }
 
  1698 //     Graph& getGraph() { return (*graph); }
 
  1700 //     //ResGraphWrapper() : graph(0) { }
 
  1701 //     ResGraphWrapper(Graph& _graph) : graph(&_graph) { }
 
  1706 #endif //HUGO_GRAPH_WRAPPER_H