LEMON/LEMON-main Changeset - r220:a5d8c039f218

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Changeset - r220:a5d8c039f218

« 217:b67149

221:64613d »

r220:a5d8c039f218

Tue, 15 Jul 2008 13:15:39

[Not Reviewed]

0 comments (0 inline)

deba@inf.elte.hu
deba@inf.elte.hu

Reorganize header files (Ticket #97) In addition on some places the DefaultMap<G, K, V> is replaced with ItemSetTraits<G, K>::template Map<V>::Type, to decrease the dependencies of different tools. It is obviously better solution.

3 31 2

default

36 files changed:

lemon/bits/enable_if.h

131

demo/graph_to_eps_demo.cc

lemon/Makefile.am

lemon/base.cc

lemon/bfs.h

lemon/bits/alteration_notifier.h

lemon/bits/base_extender.h

lemon/bits/graph_extender.h

lemon/bits/traits.h

lemon/bits/vector_map.h

lemon/concepts/digraph.h

lemon/concepts/graph.h

lemon/concepts/graph_components.h

lemon/concepts/heap.h

lemon/concepts/maps.h

lemon/concepts/path.h

lemon/bits/invalid.h

lemon/bits/utility.h

140

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lemon/bits/enable_if.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		// This file contains a modified version of the enable_if library from BOOST.
 		// See the appropriate copyright notice below.
 		// Boost enable_if library
 		// Copyright 2003 (c) The Trustees of Indiana University.
 		// Use, modification, and distribution is subject to the Boost Software
 		// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 		// http://www.boost.org/LICENSE_1_0.txt)
 		//    Authors: Jaakko Jarvi (jajarvi at osl.iu.edu)
 		//             Jeremiah Willcock (jewillco at osl.iu.edu)
 		//             Andrew Lumsdaine (lums at osl.iu.edu)
 		#ifndef LEMON_BITS_ENABLE_IF_H
 		#define LEMON_BITS_ENABLE_IF_H
 		///\file
 		///\brief Miscellaneous basic utilities
 		namespace lemon
+		{
 		  /// Basic type for defining "tags". A "YES" condition for \c enable_if.
 		  /// Basic type for defining "tags". A "YES" condition for \c enable_if.
 		  ///
 		  ///\sa False
 		  struct True {
 		    ///\e
 		    static const bool value = true;
 		  };
 		  /// Basic type for defining "tags". A "NO" condition for \c enable_if.
 		  /// Basic type for defining "tags". A "NO" condition for \c enable_if.
 		  ///
 		  ///\sa True
 		  struct False {
 		    ///\e
 		    static const bool value = false;
 		  };
 		  template <typename T>
 		  struct Wrap {
 		    const T &value;
 		    Wrap(const T &t) : value(t) {}
 		  };
 		  /**************** dummy class to avoid ambiguity ****************/
 		  template<int T> struct dummy { dummy(int) {} };
 		  /**************** enable_if from BOOST ****************/
 		  template <typename Type, typename T = void>
 		  struct exists {
 		    typedef T type;
 		  };
 		  template <bool B, class T = void>
 		  struct enable_if_c {
 		    typedef T type;
 		  };
 		  template <class T>
 		  struct enable_if_c<false, T> {};
 		  template <class Cond, class T = void>
 		  struct enable_if : public enable_if_c<Cond::value, T> {};
 		  template <bool B, class T>
 		  struct lazy_enable_if_c {
 		    typedef typename T::type type;
 		  };
 		  template <class T>
 		  struct lazy_enable_if_c<false, T> {};
 		  template <class Cond, class T>
 		  struct lazy_enable_if : public lazy_enable_if_c<Cond::value, T> {};
 		  template <bool B, class T = void>
 		  struct disable_if_c {
 		    typedef T type;
 		  };
 		  template <class T>
 		  struct disable_if_c<true, T> {};
 		  template <class Cond, class T = void>
 		  struct disable_if : public disable_if_c<Cond::value, T> {};
 		  template <bool B, class T>
 		  struct lazy_disable_if_c {
 		    typedef typename T::type type;
 		  };
 		  template <class T>
 		  struct lazy_disable_if_c<true, T> {};
 		  template <class Cond, class T>
 		  struct lazy_disable_if : public lazy_disable_if_c<Cond::value, T> {};
 		} // namespace lemon
 		#endif

demo/graph_to_eps_demo.cc

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		/// \ingroup demos
 		/// \file
 		/// \brief Demo of the graph drawing function \ref graphToEps()
 		///
 		/// This demo program shows examples how to use the function \ref
 		/// graphToEps(). It takes no input but simply creates seven
 		/// <tt>.eps</tt> files demonstrating the capability of \ref
 		/// graphToEps(), and showing how to draw directed graphs,
 		/// how to handle parallel egdes, how to change the properties (like
 		/// color, shape, size, title etc.) of nodes and arcs individually
 		/// using appropriate \ref maps-page "graph maps".
 		///
 		/// \include graph_to_eps_demo.cc
 		#include<lemon/list_graph.h>
 		#include<lemon/graph_utils.h>
 		#include<lemon/graph_to_eps.h>
 		#include<lemon/math.h>
 		using namespace std;
 		using namespace lemon;
 		int main()
+		{
 		  Palette palette;
 		  Palette paletteW(true);
 		  // Create a small digraph
 		  ListDigraph g;
 		  typedef ListDigraph::Node Node;
 		  typedef ListDigraph::NodeIt NodeIt;
 		  typedef ListDigraph::Arc Arc;
 		  typedef dim2::Point<int> Point;
 		  Node n1=g.addNode();
 		  Node n2=g.addNode();
 		  Node n3=g.addNode();
 		  Node n4=g.addNode();
 		  Node n5=g.addNode();
 		  ListDigraph::NodeMap<Point> coords(g);
 		  ListDigraph::NodeMap<double> sizes(g);
 		  ListDigraph::NodeMap<int> colors(g);
 		  ListDigraph::NodeMap<int> shapes(g);
 		  ListDigraph::ArcMap<int> acolors(g);
 		  ListDigraph::ArcMap<int> widths(g);
 		  coords[n1]=Point(50,50);  sizes[n1]=1; colors[n1]=1; shapes[n1]=0;
 		  coords[n2]=Point(50,70);  sizes[n2]=2; colors[n2]=2; shapes[n2]=2;
 		  coords[n3]=Point(70,70);  sizes[n3]=1; colors[n3]=3; shapes[n3]=0;
 		  coords[n4]=Point(70,50);  sizes[n4]=2; colors[n4]=4; shapes[n4]=1;
 		  coords[n5]=Point(85,60);  sizes[n5]=3; colors[n5]=5; shapes[n5]=2;
 		  Arc a;
 		  a=g.addArc(n1,n2); acolors[a]=0; widths[a]=1;
 		  a=g.addArc(n2,n3); acolors[a]=0; widths[a]=1;
 		  a=g.addArc(n3,n5); acolors[a]=0; widths[a]=3;
 		  a=g.addArc(n5,n4); acolors[a]=0; widths[a]=1;
 		  a=g.addArc(n4,n1); acolors[a]=0; widths[a]=1;
 		  a=g.addArc(n2,n4); acolors[a]=1; widths[a]=2;
 		  a=g.addArc(n3,n4); acolors[a]=2; widths[a]=1;
 		  IdMap<ListDigraph,Node> id(g);
 		  // Create .eps files showing the digraph with different options
 		  cout << "Create 'graph_to_eps_demo_out_1_pure.eps'" << endl;
 		  graphToEps(g,"graph_to_eps_demo_out_1_pure.eps").
 		    coords(coords).
 		    title("Sample .eps figure").
 		    copyright("(C) 2003-2008 LEMON Project").
 		    run();
 		  cout << "Create 'graph_to_eps_demo_out_2.eps'" << endl;
 		  graphToEps(g,"graph_to_eps_demo_out_2.eps").
 		    coords(coords).
 		    title("Sample .eps figure").
 		    copyright("(C) 2003-2008 LEMON Project").
 		    absoluteNodeSizes().absoluteArcWidths().
 		    nodeScale(2).nodeSizes(sizes).
 		    nodeShapes(shapes).
 		    nodeColors(composeMap(palette,colors)).
 		    arcColors(composeMap(palette,acolors)).
 		    arcWidthScale(.4).arcWidths(widths).
 		    nodeTexts(id).nodeTextSize(3).
 		    run();
 		  cout << "Create 'graph_to_eps_demo_out_3_arr.eps'" << endl;
 		  graphToEps(g,"graph_to_eps_demo_out_3_arr.eps").
 		    title("Sample .eps figure (with arrowheads)").
 		    copyright("(C) 2003-2008 LEMON Project").
 		    absoluteNodeSizes().absoluteArcWidths().
 		    nodeColors(composeMap(palette,colors)).
 		    coords(coords).
 		    nodeScale(2).nodeSizes(sizes).
 		    nodeShapes(shapes).
 		    arcColors(composeMap(palette,acolors)).
 		    arcWidthScale(.4).arcWidths(widths).
 		    nodeTexts(id).nodeTextSize(3).
 		    drawArrows().arrowWidth(2).arrowLength(2).
 		    run();
 		  // Add more arcs to the digraph
 		  a=g.addArc(n1,n4); acolors[a]=2; widths[a]=1;
 		  a=g.addArc(n4,n1); acolors[a]=1; widths[a]=2;
 		  a=g.addArc(n1,n2); acolors[a]=1; widths[a]=1;
 		  a=g.addArc(n1,n2); acolors[a]=2; widths[a]=1;
 		  a=g.addArc(n1,n2); acolors[a]=3; widths[a]=1;
 		  a=g.addArc(n1,n2); acolors[a]=4; widths[a]=1;
 		  a=g.addArc(n1,n2); acolors[a]=5; widths[a]=1;
 		  a=g.addArc(n1,n2); acolors[a]=6; widths[a]=1;
 		  a=g.addArc(n1,n2); acolors[a]=7; widths[a]=1;
 		  cout << "Create 'graph_to_eps_demo_out_4_par.eps'" << endl;
 		  graphToEps(g,"graph_to_eps_demo_out_4_par.eps").
 		    title("Sample .eps figure (parallel arcs)").
 		    copyright("(C) 2003-2008 LEMON Project").
 		    absoluteNodeSizes().absoluteArcWidths().
 		    nodeShapes(shapes).
 		    coords(coords).
 		    nodeScale(2).nodeSizes(sizes).
 		    nodeColors(composeMap(palette,colors)).
 		    arcColors(composeMap(palette,acolors)).
 		    arcWidthScale(.4).arcWidths(widths).
 		    nodeTexts(id).nodeTextSize(3).
 		    enableParallel().parArcDist(1.5).
 		    run();
 		  cout << "Create 'graph_to_eps_demo_out_5_par_arr.eps'" << endl;
 		  graphToEps(g,"graph_to_eps_demo_out_5_par_arr.eps").
 		    title("Sample .eps figure (parallel arcs and arrowheads)").
 		    copyright("(C) 2003-2008 LEMON Project").
 		    absoluteNodeSizes().absoluteArcWidths().
 		    nodeScale(2).nodeSizes(sizes).
 		    coords(coords).
 		    nodeShapes(shapes).
 		    nodeColors(composeMap(palette,colors)).
 		    arcColors(composeMap(palette,acolors)).
 		    arcWidthScale(.3).arcWidths(widths).
 		    nodeTexts(id).nodeTextSize(3).
 		    enableParallel().parArcDist(1).
 		    drawArrows().arrowWidth(1).arrowLength(1).
 		    run();
 		  cout << "Create 'graph_to_eps_demo_out_6_par_arr_a4.eps'" << endl;
 		  graphToEps(g,"graph_to_eps_demo_out_6_par_arr_a4.eps").
 		    title("Sample .eps figure (fits to A4)").
 		    copyright("(C) 2003-2008 LEMON Project").
 		    scaleToA4().
 		    absoluteNodeSizes().absoluteArcWidths().
 		    nodeScale(2).nodeSizes(sizes).
 		    coords(coords).
 		    nodeShapes(shapes).
 		    nodeColors(composeMap(palette,colors)).
 		    arcColors(composeMap(palette,acolors)).
 		    arcWidthScale(.3).arcWidths(widths).
 		    nodeTexts(id).nodeTextSize(3).
 		    enableParallel().parArcDist(1).
 		    drawArrows().arrowWidth(1).arrowLength(1).
 		    run();
 		  // Create an .eps file showing the colors of a default Palette
 		  ListDigraph h;
 		  ListDigraph::NodeMap<int> hcolors(h);
 		  ListDigraph::NodeMap<Point> hcoords(h);
 		  int cols=int(sqrt(double(palette.size())));
 		  for(int i=0;i<int(paletteW.size());i++) {
 		    Node n=h.addNode();
 		    hcoords[n]=Point(1+i%cols,1+i/cols);
 		    hcolors[n]=i;
+		  }
 		  cout << "Create 'graph_to_eps_demo_out_7_colors.eps'" << endl;
 		  graphToEps(h,"graph_to_eps_demo_out_7_colors.eps").
 		    scale(60).
 		    title("Sample .eps figure (Palette demo)").
 		    copyright("(C) 2003-2008 LEMON Project").
 		    coords(hcoords).
 		    absoluteNodeSizes().absoluteArcWidths().
 		    nodeScale(.45).
 		    distantColorNodeTexts().
 		    nodeTexts(hcolors).nodeTextSize(.6).
 		    nodeColors(composeMap(paletteW,hcolors)).
 		    run();
 		  return 0;
+		}

lemon/Makefile.am

Show inline comments

 		EXTRA_DIST += \
 			lemon/lemon.pc.in \
 			lemon/CMakeLists.txt
 		pkgconfig_DATA += lemon/lemon.pc
 		lib_LTLIBRARIES += lemon/libemon.la
 		lemon_libemon_la_SOURCES = \
 		        lemon/arg_parser.cc \
 		        lemon/base.cc \
 		        lemon/color.cc \
 		        lemon/random.cc
 		lemon_libemon_la_CXXFLAGS = $(GLPK_CFLAGS) $(CPLEX_CFLAGS) $(SOPLEX_CXXFLAGS)
 		lemon_libemon_la_LDFLAGS = $(GLPK_LIBS) $(CPLEX_LIBS) $(SOPLEX_LIBS)
 		lemon_HEADERS += \
 		        lemon/arg_parser.h \
 			lemon/assert.h \
 		        lemon/bfs.h \
 		        lemon/bin_heap.h \
 		        lemon/color.h \
 			lemon/concept_check.h \
 		        lemon/counter.h \
 			lemon/core.h \
 		        lemon/dfs.h \
 		        lemon/dijkstra.h \
 		        lemon/dim2.h \
 			lemon/error.h \
 		        lemon/graph_to_eps.h \
 			lemon/graph_utils.h \
 			lemon/kruskal.h \
 			lemon/lgf_reader.h \
 			lemon/lgf_writer.h \
 			lemon/list_graph.h \
 			lemon/maps.h \
 			lemon/math.h \
 			lemon/path.h \
 		        lemon/random.h \
 			lemon/smart_graph.h \
 		        lemon/time_measure.h \
 		        lemon/tolerance.h \
 			lemon/unionfind.h
 		bits_HEADERS += \
 			lemon/bits/alteration_notifier.h \
 			lemon/bits/array_map.h \
 			lemon/bits/base_extender.h \
 		        lemon/bits/bezier.h \
 			lemon/bits/default_map.h \
 		        lemon/bits/enable_if.h \
 			lemon/bits/graph_extender.h \
 		        lemon/bits/invalid.h \
 			lemon/bits/map_extender.h \
 			lemon/bits/path_dump.h \
 			lemon/bits/traits.h \
 		        lemon/bits/utility.h \
 			lemon/bits/vector_map.h
 		concept_HEADERS += \
 			lemon/concepts/digraph.h \
 			lemon/concepts/graph.h \
 			lemon/concepts/graph_components.h \
 			lemon/concepts/heap.h \
 			lemon/concepts/maps.h \
 			lemon/concepts/path.h

lemon/base.cc

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\file
 		///\brief Some basic non-inline functions and static global data.
 		#include<lemon/tolerance.h>
-		#include<lemon/bits/invalid.h>
+		#include<lemon/core.h>
 		namespace lemon {
 		  float Tolerance<float>::def_epsilon = 1e-4;
 		  double Tolerance<double>::def_epsilon = 1e-10;
 		  long double Tolerance<long double>::def_epsilon = 1e-14;
 		#ifndef LEMON_ONLY_TEMPLATES
 		  const Invalid INVALID = Invalid();
 		#endif
 		} //namespace lemon

lemon/bfs.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_BFS_H
 		#define LEMON_BFS_H
 		///\ingroup search
 		///\file
 		///\brief Bfs algorithm.
 		#include <lemon/list_graph.h>
 		#include <lemon/graph_utils.h>
 		#include <lemon/bits/path_dump.h>
-		#include <lemon/bits/invalid.h>
+		#include <lemon/core.h>
 		#include <lemon/error.h>
 		#include <lemon/maps.h>
 		namespace lemon {
 		  ///Default traits class of Bfs class.
 		  ///Default traits class of Bfs class.
 		  ///\tparam GR Digraph type.
 		  template<class GR>
 		  struct BfsDefaultTraits
+		  {
 		    ///The digraph type the algorithm runs on.
 		    typedef GR Digraph;
 		    ///\brief The type of the map that stores the last
 		    ///arcs of the shortest paths.
 		    ///
 		    ///The type of the map that stores the last
 		    ///arcs of the shortest paths.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///
 		    typedef typename Digraph::template NodeMap<typename GR::Arc> PredMap;
 		    ///Instantiates a PredMap.
 		    ///This function instantiates a \ref PredMap.
 		    ///\param G is the digraph, to which we would like to define the PredMap.
 		    ///\todo The digraph alone may be insufficient to initialize
 		    static PredMap *createPredMap(const GR &G)
+		    {
 		      return new PredMap(G);
+		    }
 		    ///The type of the map that indicates which nodes are processed.
 		    ///The type of the map that indicates which nodes are processed.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///\todo named parameter to set this type, function to read and write.
 		    typedef NullMap<typename Digraph::Node,bool> ProcessedMap;
 		    ///Instantiates a ProcessedMap.
 		    ///This function instantiates a \ref ProcessedMap.
 		    ///\param g is the digraph, to which
 		    ///we would like to define the \ref ProcessedMap
 		#ifdef DOXYGEN
 		    static ProcessedMap *createProcessedMap(const GR &g)
 		#else
 		    static ProcessedMap *createProcessedMap(const GR &)
 		#endif
+		    {
 		      return new ProcessedMap();
+		    }
 		    ///The type of the map that indicates which nodes are reached.
 		    ///The type of the map that indicates which nodes are reached.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///\todo named parameter to set this type, function to read and write.
 		    typedef typename Digraph::template NodeMap<bool> ReachedMap;
 		    ///Instantiates a ReachedMap.
 		    ///This function instantiates a \ref ReachedMap.
 		    ///\param G is the digraph, to which
 		    ///we would like to define the \ref ReachedMap.
 		    static ReachedMap *createReachedMap(const GR &G)
+		    {
 		      return new ReachedMap(G);
+		    }
 		    ///The type of the map that stores the dists of the nodes.
 		    ///The type of the map that stores the dists of the nodes.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///
 		    typedef typename Digraph::template NodeMap<int> DistMap;
 		    ///Instantiates a DistMap.
 		    ///This function instantiates a \ref DistMap.
 		    ///\param G is the digraph, to which we would like to define
 		    ///the \ref DistMap
 		    static DistMap *createDistMap(const GR &G)
+		    {
 		      return new DistMap(G);
+		    }
 		  };
 		  ///%BFS algorithm class.
 		  ///\ingroup search
 		  ///This class provides an efficient implementation of the %BFS algorithm.
 		  ///
 		  ///\tparam GR The digraph type the algorithm runs on. The default value is
 		  ///\ref ListDigraph. The value of GR is not used directly by Bfs, it
 		  ///is only passed to \ref BfsDefaultTraits.
 		  ///\tparam TR Traits class to set various data types used by the algorithm.
 		  ///The default traits class is
 		  ///\ref BfsDefaultTraits "BfsDefaultTraits<GR>".
 		  ///See \ref BfsDefaultTraits for the documentation of
 		  ///a Bfs traits class.
 		#ifdef DOXYGEN
 		  template <typename GR,
 		            typename TR>
 		#else
 		  template <typename GR=ListDigraph,
 		            typename TR=BfsDefaultTraits<GR> >
 		#endif
 		  class Bfs {
 		  public:
 		    /**
 		     * \brief \ref Exception for uninitialized parameters.
+		     *
 		     * This error represents problems in the initialization
 		     * of the parameters of the algorithms.
 		     */
 		    class UninitializedParameter : public lemon::UninitializedParameter {
 		    public:
 		      virtual const char* what() const throw() {
 		        return "lemon::Bfs::UninitializedParameter";
+		      }
 		    };
 		    typedef TR Traits;
 		    ///The type of the underlying digraph.
 		    typedef typename TR::Digraph Digraph;
 		    ///\brief The type of the map that stores the last
 		    ///arcs of the shortest paths.
 		    typedef typename TR::PredMap PredMap;
 		    ///The type of the map indicating which nodes are reached.
 		    typedef typename TR::ReachedMap ReachedMap;
 		    ///The type of the map indicating which nodes are processed.
 		    typedef typename TR::ProcessedMap ProcessedMap;
 		    ///The type of the map that stores the dists of the nodes.
 		    typedef typename TR::DistMap DistMap;
 		  private:
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    /// Pointer to the underlying digraph.
 		    const Digraph *G;
 		    ///Pointer to the map of predecessors arcs.
 		    PredMap *_pred;
 		    ///Indicates if \ref _pred is locally allocated (\c true) or not.
 		    bool local_pred;
 		    ///Pointer to the map of distances.
 		    DistMap *_dist;
 		    ///Indicates if \ref _dist is locally allocated (\c true) or not.
 		    bool local_dist;
 		    ///Pointer to the map of reached status of the nodes.
 		    ReachedMap *_reached;
 		    ///Indicates if \ref _reached is locally allocated (\c true) or not.
 		    bool local_reached;
 		    ///Pointer to the map of processed status of the nodes.
 		    ProcessedMap *_processed;
 		    ///Indicates if \ref _processed is locally allocated (\c true) or not.
 		    bool local_processed;
 		    std::vector<typename Digraph::Node> _queue;
 		    int _queue_head,_queue_tail,_queue_next_dist;
 		    int _curr_dist;
 		    ///Creates the maps if necessary.
 		    ///\todo Better memory allocation (instead of new).
 		    void create_maps()
+		    {
 		      if(!_pred) {
 		        local_pred = true;
 		        _pred = Traits::createPredMap(*G);
+		      }
 		      if(!_dist) {
 		        local_dist = true;
 		        _dist = Traits::createDistMap(*G);
+		      }
 		      if(!_reached) {
 		        local_reached = true;
 		        _reached = Traits::createReachedMap(*G);
+		      }
 		      if(!_processed) {
 		        local_processed = true;
 		        _processed = Traits::createProcessedMap(*G);
+		      }
+		    }
 		  protected:
 		    Bfs() {}
 		  public:
 		    typedef Bfs Create;
 		    ///\name Named template parameters
 		    ///@{
 		    template <class T>
 		    struct DefPredMapTraits : public Traits {
 		      typedef T PredMap;
 		      static PredMap *createPredMap(const Digraph &)
+		      {
 		        throw UninitializedParameter();
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///PredMap type
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting PredMap type
 		    ///
 		    template <class T>
 		    struct DefPredMap : public Bfs< Digraph, DefPredMapTraits<T> > {
 		      typedef Bfs< Digraph, DefPredMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct DefDistMapTraits : public Traits {
 		      typedef T DistMap;
 		      static DistMap *createDistMap(const Digraph &)
+		      {
 		        throw UninitializedParameter();
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///DistMap type
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting DistMap type
 		    ///
 		    template <class T>
 		    struct DefDistMap : public Bfs< Digraph, DefDistMapTraits<T> > {
 		      typedef Bfs< Digraph, DefDistMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct DefReachedMapTraits : public Traits {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &)
+		      {
 		        throw UninitializedParameter();
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///ReachedMap type
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting ReachedMap type
 		    ///
 		    template <class T>
 		    struct DefReachedMap : public Bfs< Digraph, DefReachedMapTraits<T> > {
 		      typedef Bfs< Digraph, DefReachedMapTraits<T> > Create;
 		    };
 		    template <class T>
 		    struct DefProcessedMapTraits : public Traits {
 		      typedef T ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &)
+		      {
 		        throw UninitializedParameter();
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter" for setting
 		    ///ProcessedMap type
 		    ///
 		    ///\ref named-templ-param "Named parameter" for setting ProcessedMap type
 		    ///
 		    template <class T>
 		    struct DefProcessedMap : public Bfs< Digraph, DefProcessedMapTraits<T> > {
 		      typedef Bfs< Digraph, DefProcessedMapTraits<T> > Create;
 		    };
 		    struct DefDigraphProcessedMapTraits : public Traits {
 		      typedef typename Digraph::template NodeMap<bool> ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &G)
+		      {
 		        return new ProcessedMap(G);
+		      }
 		    };
 		    ///\brief \ref named-templ-param "Named parameter"
 		    ///for setting the ProcessedMap type to be Digraph::NodeMap<bool>.
 		    ///
 		    ///\ref named-templ-param "Named parameter"
 		    ///for setting the ProcessedMap type to be Digraph::NodeMap<bool>.
 		    ///If you don't set it explicitly, it will be automatically allocated.
 		    template <class T>
 		    struct DefProcessedMapToBeDefaultMap :
 		      public Bfs< Digraph, DefDigraphProcessedMapTraits> {
 		      typedef Bfs< Digraph, DefDigraphProcessedMapTraits> Create;
 		    };
 		    ///@}
 		  public:
 		    ///Constructor.
 		    ///\param _G the digraph the algorithm will run on.
 		    ///
 		    Bfs(const Digraph& _G) :
 		      G(&_G),
 		      _pred(NULL), local_pred(false),
 		      _dist(NULL), local_dist(false),
 		      _reached(NULL), local_reached(false),
 		      _processed(NULL), local_processed(false)
 		    { }
 		    ///Destructor.
 		    ~Bfs()
+		    {
 		      if(local_pred) delete _pred;
 		      if(local_dist) delete _dist;
 		      if(local_reached) delete _reached;
 		      if(local_processed) delete _processed;
+		    }
 		    ///Sets the map storing the predecessor arcs.
 		    ///Sets the map storing the predecessor arcs.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Bfs &predMap(PredMap &m)
+		    {
 		      if(local_pred) {
 		        delete _pred;
 		        local_pred=false;
+		      }
 		      _pred = &m;
 		      return *this;
+		    }
 		    ///Sets the map indicating the reached nodes.
 		    ///Sets the map indicating the reached nodes.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Bfs &reachedMap(ReachedMap &m)
+		    {
 		      if(local_reached) {
 		        delete _reached;
 		        local_reached=false;
+		      }
 		      _reached = &m;
 		      return *this;
+		    }
 		    ///Sets the map indicating the processed nodes.
 		    ///Sets the map indicating the processed nodes.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Bfs &processedMap(ProcessedMap &m)
+		    {
 		      if(local_processed) {
 		        delete _processed;
 		        local_processed=false;
+		      }
 		      _processed = &m;
 		      return *this;
+		    }
 		    ///Sets the map storing the distances calculated by the algorithm.
 		    ///Sets the map storing the distances calculated by the algorithm.
 		    ///If you don't use this function before calling \ref run(),
 		    ///it will allocate one. The destructor deallocates this
 		    ///automatically allocated map, of course.
 		    ///\return <tt> (*this) </tt>
 		    Bfs &distMap(DistMap &m)
+		    {
 		      if(local_dist) {
 		        delete _dist;
 		        local_dist=false;
+		      }
 		      _dist = &m;
 		      return *this;
+		    }
 		  public:
 		    ///\name Execution control
 		    ///The simplest way to execute the algorithm is to use
 		    ///one of the member functions called \c run(...).
 		    ///\n
 		    ///If you need more control on the execution,
 		    ///first you must call \ref init(), then you can add several source nodes
 		    ///with \ref addSource().
 		    ///Finally \ref start() will perform the actual path
 		    ///computation.
 		    ///@{
 		    ///\brief Initializes the internal data structures.
 		    ///
 		    ///Initializes the internal data structures.
 		    ///
 		    void init()
+		    {
 		      create_maps();
 		      _queue.resize(countNodes(*G));
 		      _queue_head=_queue_tail=0;
 		      _curr_dist=1;
 		      for ( NodeIt u(*G) ; u!=INVALID ; ++u ) {
 		        _pred->set(u,INVALID);
 		        _reached->set(u,false);
 		        _processed->set(u,false);
+		      }
+		    }
 		    ///Adds a new source node.
 		    ///Adds a new source node to the set of nodes to be processed.
 		    ///
 		    void addSource(Node s)
+		    {
 		      if(!(*_reached)[s])
+		        {
 		          _reached->set(s,true);
 		          _pred->set(s,INVALID);
 		          _dist->set(s,0);
 		          _queue[_queue_head++]=s;
 		          _queue_next_dist=_queue_head;
+		        }
+		    }
 		    ///Processes the next node.
 		    ///Processes the next node.
 		    ///
 		    ///\return The processed node.
 		    ///
 		    ///\warning The queue must not be empty!
 		    Node processNextNode()
+		    {
 		      if(_queue_tail==_queue_next_dist) {
 		        _curr_dist++;
 		        _queue_next_dist=_queue_head;
+		      }
 		      Node n=_queue[_queue_tail++];
 		      _processed->set(n,true);
 		      Node m;
 		      for(OutArcIt e(*G,n);e!=INVALID;++e)
 		        if(!(*_reached)[m=G->target(e)]) {
 		          _queue[_queue_head++]=m;
 		          _reached->set(m,true);
 		          _pred->set(m,e);
 		          _dist->set(m,_curr_dist);
+		        }
 		      return n;
+		    }
 		    ///Processes the next node.
 		    ///Processes the next node. And checks that the given target node
 		    ///is reached. If the target node is reachable from the processed
 		    ///node then the reached parameter will be set true. The reached
 		    ///parameter should be initially false.
 		    ///
 		    ///\param target The target node.
 		    ///\retval reach Indicates that the target node is reached.
 		    ///\return The processed node.
 		    ///
 		    ///\warning The queue must not be empty!
 		    Node processNextNode(Node target, bool& reach)
+		    {
 		      if(_queue_tail==_queue_next_dist) {
 		        _curr_dist++;
 		        _queue_next_dist=_queue_head;
+		      }
 		      Node n=_queue[_queue_tail++];
 		      _processed->set(n,true);
 		      Node m;
 		      for(OutArcIt e(*G,n);e!=INVALID;++e)
 		        if(!(*_reached)[m=G->target(e)]) {
 		          _queue[_queue_head++]=m;
 		          _reached->set(m,true);
 		          _pred->set(m,e);
 		          _dist->set(m,_curr_dist);
 		          reach = reach || (target == m);
+		        }
 		      return n;
+		    }
 		    ///Processes the next node.
 		    ///Processes the next node. And checks that at least one of
 		    ///reached node has true value in the \c nm node map. If one node
 		    ///with true value is reachable from the processed node then the
 		    ///rnode parameter will be set to the first of such nodes.
 		    ///
 		    ///\param nm The node map of possible targets.
 		    ///\retval rnode The reached target node.
 		    ///\return The processed node.
 		    ///
 		    ///\warning The queue must not be empty!
 		    template<class NM>
 		    Node processNextNode(const NM& nm, Node& rnode)
+		    {
 		      if(_queue_tail==_queue_next_dist) {
 		        _curr_dist++;
 		        _queue_next_dist=_queue_head;
+		      }
 		      Node n=_queue[_queue_tail++];
 		      _processed->set(n,true);
 		      Node m;
 		      for(OutArcIt e(*G,n);e!=INVALID;++e)
 		        if(!(*_reached)[m=G->target(e)]) {
 		          _queue[_queue_head++]=m;
 		          _reached->set(m,true);
 		          _pred->set(m,e);
 		          _dist->set(m,_curr_dist);
 		          if (nm[m] && rnode == INVALID) rnode = m;
+		        }
 		      return n;
+		    }
 		    ///Next node to be processed.
 		    ///Next node to be processed.
 		    ///
 		    ///\return The next node to be processed or INVALID if the queue is
 		    /// empty.
 		    Node nextNode()
+		    {
 		      return _queue_tail<_queue_head?_queue[_queue_tail]:INVALID;
+		    }
 		    ///\brief Returns \c false if there are nodes
 		    ///to be processed in the queue
 		    ///
 		    ///Returns \c false if there are nodes
 		    ///to be processed in the queue
 		    bool emptyQueue() { return _queue_tail==_queue_head; }
 		    ///Returns the number of the nodes to be processed.
 		    ///Returns the number of the nodes to be processed in the queue.
 		    int queueSize() { return _queue_head-_queue_tail; }
 		    ///Executes the algorithm.
 		    ///Executes the algorithm.
 		    ///
 		    ///\pre init() must be called and at least one node should be added
 		    ///with addSource() before using this function.
 		    ///
 		    ///This method runs the %BFS algorithm from the root node(s)
 		    ///in order to
 		    ///compute the
 		    ///shortest path to each node. The algorithm computes
 		    ///- The shortest path tree.
 		    ///- The distance of each node from the root(s).
 		    void start()
+		    {
 		      while ( !emptyQueue() ) processNextNode();
+		    }
 		    ///Executes the algorithm until \c dest is reached.
 		    ///Executes the algorithm until \c dest is reached.
 		    ///
 		    ///\pre init() must be called and at least one node should be added
 		    ///with addSource() before using this function.
 		    ///
 		    ///This method runs the %BFS algorithm from the root node(s)
 		    ///in order to compute the shortest path to \c dest.
 		    ///The algorithm computes
 		    ///- The shortest path to \c  dest.
 		    ///- The distance of \c dest from the root(s).
 		    void start(Node dest)
+		    {
 		      bool reach = false;
 		      while ( !emptyQueue() && !reach ) processNextNode(dest, reach);
+		    }
 		    ///Executes the algorithm until a condition is met.
 		    ///Executes the algorithm until a condition is met.
 		    ///
 		    ///\pre init() must be called and at least one node should be added
 		    ///with addSource() before using this function.
 		    ///
 		    ///\param nm must be a bool (or convertible) node map. The
 		    ///algorithm will stop when it reaches a node \c v with
 		    /// <tt>nm[v]</tt> true.
 		    ///
 		    ///\return The reached node \c v with <tt>nm[v]</tt> true or
 		    ///\c INVALID if no such node was found.
 		    template<class NM>
 		    Node start(const NM &nm)
+		    {
 		      Node rnode = INVALID;
 		      while ( !emptyQueue() && rnode == INVALID ) {
 		        processNextNode(nm, rnode);
+		      }
 		      return rnode;
+		    }
 		    ///Runs %BFS algorithm from node \c s.
 		    ///This method runs the %BFS algorithm from a root node \c s
 		    ///in order to
 		    ///compute the
 		    ///shortest path to each node. The algorithm computes
 		    ///- The shortest path tree.
 		    ///- The distance of each node from the root.
 		    ///
 		    ///\note b.run(s) is just a shortcut of the following code.
 		    ///\code
 		    ///  b.init();
 		    ///  b.addSource(s);
 		    ///  b.start();
 		    ///\endcode
 		    void run(Node s) {
 		      init();
 		      addSource(s);
 		      start();
+		    }
 		    ///Finds the shortest path between \c s and \c t.
 		    ///Finds the shortest path between \c s and \c t.
 		    ///
 		    ///\return The length of the shortest s---t path if there exists one,
 		    ///0 otherwise.
 		    ///\note Apart from the return value, b.run(s) is
 		    ///just a shortcut of the following code.
 		    ///\code
 		    ///  b.init();
 		    ///  b.addSource(s);
 		    ///  b.start(t);
 		    ///\endcode
 		    int run(Node s,Node t) {
 		      init();
 		      addSource(s);
 		      start(t);
 		      return reached(t) ? _curr_dist : 0;
+		    }
 		    ///@}
 		    ///\name Query Functions
 		    ///The result of the %BFS algorithm can be obtained using these
 		    ///functions.\n
 		    ///Before the use of these functions,
 		    ///either run() or start() must be calleb.
 		    ///@{
 		    typedef PredMapPath<Digraph, PredMap> Path;
 		    ///Gives back the shortest path.
 		    ///Gives back the shortest path.
 		    ///\pre The \c t should be reachable from the source.
 		    Path path(Node t)
+		    {
 		      return Path(*G, *_pred, t);
+		    }
 		    ///The distance of a node from the root(s).
 		    ///Returns the distance of a node from the root(s).
 		    ///\pre \ref run() must be called before using this function.
 		    ///\warning If node \c v in unreachable from the root(s) the return value
 		    ///of this function is undefined.
 		    int dist(Node v) const { return (*_dist)[v]; }
 		    ///Returns the 'previous arc' of the shortest path tree.
 		    ///For a node \c v it returns the 'previous arc'
 		    ///of the shortest path tree,
 		    ///i.e. it returns the last arc of a shortest path from the root(s) to \c
 		    ///v. It is \ref INVALID
 		    ///if \c v is unreachable from the root(s) or \c v is a root. The
 		    ///shortest path tree used here is equal to the shortest path tree used in
 		    ///\ref predNode().
 		    ///\pre Either \ref run() or \ref start() must be called before using
 		    ///this function.
 		    Arc predArc(Node v) const { return (*_pred)[v];}
 		    ///Returns the 'previous node' of the shortest path tree.
 		    ///For a node \c v it returns the 'previous node'
 		    ///of the shortest path tree,
 		    ///i.e. it returns the last but one node from a shortest path from the
 		    ///root(a) to \c /v.
 		    ///It is INVALID if \c v is unreachable from the root(s) or
 		    ///if \c v itself a root.
 		    ///The shortest path tree used here is equal to the shortest path
 		    ///tree used in \ref predArc().
 		    ///\pre Either \ref run() or \ref start() must be called before
 		    ///using this function.
 		    Node predNode(Node v) const { return (*_pred)[v]==INVALID ? INVALID:
 		                                  G->source((*_pred)[v]); }
 		    ///Returns a reference to the NodeMap of distances.
 		    ///Returns a reference to the NodeMap of distances.
 		    ///\pre Either \ref run() or \ref init() must
 		    ///be called before using this function.
 		    const DistMap &distMap() const { return *_dist;}
 		    ///Returns a reference to the shortest path tree map.
 		    ///Returns a reference to the NodeMap of the arcs of the
 		    ///shortest path tree.
 		    ///\pre Either \ref run() or \ref init()
 		    ///must be called before using this function.
 		    const PredMap &predMap() const { return *_pred;}
 		    ///Checks if a node is reachable from the root.
 		    ///Returns \c true if \c v is reachable from the root.
 		    ///\warning The source nodes are indicated as unreached.
 		    ///\pre Either \ref run() or \ref start()
 		    ///must be called before using this function.
 		    ///
 		    bool reached(Node v) { return (*_reached)[v]; }
 		    ///@}
 		  };
 		  ///Default traits class of Bfs function.
 		  ///Default traits class of Bfs function.
 		  ///\tparam GR Digraph type.
 		  template<class GR>
 		  struct BfsWizardDefaultTraits
+		  {
 		    ///The digraph type the algorithm runs on.
 		    typedef GR Digraph;
 		    ///\brief The type of the map that stores the last
 		    ///arcs of the shortest paths.
 		    ///
 		    ///The type of the map that stores the last
 		    ///arcs of the shortest paths.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///
 		    typedef NullMap<typename Digraph::Node,typename GR::Arc> PredMap;
 		    ///Instantiates a PredMap.
 		    ///This function instantiates a \ref PredMap.
 		    ///\param g is the digraph, to which we would like to define the PredMap.
 		    ///\todo The digraph alone may be insufficient to initialize
 		#ifdef DOXYGEN
 		    static PredMap *createPredMap(const GR &g)
 		#else
 		    static PredMap *createPredMap(const GR &)
 		#endif
+		    {
 		      return new PredMap();
+		    }
 		    ///The type of the map that indicates which nodes are processed.
 		    ///The type of the map that indicates which nodes are processed.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///\todo named parameter to set this type, function to read and write.
 		    typedef NullMap<typename Digraph::Node,bool> ProcessedMap;
 		    ///Instantiates a ProcessedMap.
 		    ///This function instantiates a \ref ProcessedMap.
 		    ///\param g is the digraph, to which
 		    ///we would like to define the \ref ProcessedMap
 		#ifdef DOXYGEN
 		    static ProcessedMap *createProcessedMap(const GR &g)
 		#else
 		    static ProcessedMap *createProcessedMap(const GR &)
 		#endif
+		    {
 		      return new ProcessedMap();
+		    }
 		    ///The type of the map that indicates which nodes are reached.
 		    ///The type of the map that indicates which nodes are reached.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///\todo named parameter to set this type, function to read and write.
 		    typedef typename Digraph::template NodeMap<bool> ReachedMap;
 		    ///Instantiates a ReachedMap.
 		    ///This function instantiates a \ref ReachedMap.
 		    ///\param G is the digraph, to which
 		    ///we would like to define the \ref ReachedMap.
 		    static ReachedMap *createReachedMap(const GR &G)
+		    {
 		      return new ReachedMap(G);
+		    }
 		    ///The type of the map that stores the dists of the nodes.
 		    ///The type of the map that stores the dists of the nodes.
 		    ///It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    ///
 		    typedef NullMap<typename Digraph::Node,int> DistMap;
 		    ///Instantiates a DistMap.
 		    ///This function instantiates a \ref DistMap.
 		    ///\param g is the digraph, to which we would like to define
 		    ///the \ref DistMap
 		#ifdef DOXYGEN
 		    static DistMap *createDistMap(const GR &g)
 		#else
 		    static DistMap *createDistMap(const GR &)
 		#endif
+		    {
 		      return new DistMap();
+		    }
 		  };
 		  /// Default traits used by \ref BfsWizard
 		  /// To make it easier to use Bfs algorithm
 		  ///we have created a wizard class.
 		  /// This \ref BfsWizard class needs default traits,
 		  ///as well as the \ref Bfs class.
 		  /// The \ref BfsWizardBase is a class to be the default traits of the
 		  /// \ref BfsWizard class.
 		  template<class GR>
 		  class BfsWizardBase : public BfsWizardDefaultTraits<GR>
+		  {
 		    typedef BfsWizardDefaultTraits<GR> Base;
 		  protected:
 		    /// Type of the nodes in the digraph.
 		    typedef typename Base::Digraph::Node Node;
 		    /// Pointer to the underlying digraph.
 		    void *_g;
 		    ///Pointer to the map of reached nodes.
 		    void *_reached;
 		    ///Pointer to the map of processed nodes.
 		    void *_processed;
 		    ///Pointer to the map of predecessors arcs.
 		    void *_pred;
 		    ///Pointer to the map of distances.
 		    void *_dist;
 		    ///Pointer to the source node.
 		    Node _source;
 		    public:
 		    /// Constructor.
 		    /// This constructor does not require parameters, therefore it initiates
 		    /// all of the attributes to default values (0, INVALID).
 		    BfsWizardBase() : _g(0), _reached(0), _processed(0), _pred(0),
 		                           _dist(0), _source(INVALID) {}
 		    /// Constructor.
 		    /// This constructor requires some parameters,
 		    /// listed in the parameters list.
 		    /// Others are initiated to 0.
 		    /// \param g is the initial value of  \ref _g
 		    /// \param s is the initial value of  \ref _source
 		    BfsWizardBase(const GR &g, Node s=INVALID) :
 		      _g(reinterpret_cast<void*>(const_cast<GR*>(&g))),
 		      _reached(0), _processed(0), _pred(0), _dist(0), _source(s) {}
 		  };
 		  /// A class to make the usage of Bfs algorithm easier
 		  /// This class is created to make it easier to use Bfs algorithm.
 		  /// It uses the functions and features of the plain \ref Bfs,
 		  /// but it is much simpler to use it.
 		  ///
 		  /// Simplicity means that the way to change the types defined
 		  /// in the traits class is based on functions that returns the new class
 		  /// and not on templatable built-in classes.
 		  /// When using the plain \ref Bfs
 		  /// the new class with the modified type comes from
 		  /// the original class by using the ::
 		  /// operator. In the case of \ref BfsWizard only
 		  /// a function have to be called and it will
 		  /// return the needed class.
 		  ///
 		  /// It does not have own \ref run method. When its \ref run method is called
 		  /// it initiates a plain \ref Bfs class, and calls the \ref Bfs::run
 		  /// method of it.
 		  template<class TR>
 		  class BfsWizard : public TR
+		  {
 		    typedef TR Base;
 		    ///The type of the underlying digraph.
 		    typedef typename TR::Digraph Digraph;
 		    //\e
 		    typedef typename Digraph::Node Node;
 		    //\e
 		    typedef typename Digraph::NodeIt NodeIt;
 		    //\e
 		    typedef typename Digraph::Arc Arc;
 		    //\e
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    ///\brief The type of the map that stores
 		    ///the reached nodes
 		    typedef typename TR::ReachedMap ReachedMap;
 		    ///\brief The type of the map that stores
 		    ///the processed nodes
 		    typedef typename TR::ProcessedMap ProcessedMap;
 		    ///\brief The type of the map that stores the last
 		    ///arcs of the shortest paths.
 		    typedef typename TR::PredMap PredMap;
 		    ///The type of the map that stores the dists of the nodes.
 		    typedef typename TR::DistMap DistMap;
 		  public:
 		    /// Constructor.
 		    BfsWizard() : TR() {}
 		    /// Constructor that requires parameters.
 		    /// Constructor that requires parameters.
 		    /// These parameters will be the default values for the traits class.
 		    BfsWizard(const Digraph &g, Node s=INVALID) :
 		      TR(g,s) {}
 		    ///Copy constructor
 		    BfsWizard(const TR &b) : TR(b) {}
 		    ~BfsWizard() {}
 		    ///Runs Bfs algorithm from a given node.
 		    ///Runs Bfs algorithm from a given node.
 		    ///The node can be given by the \ref source function.
 		    void run()
+		    {
 		      if(Base::_source==INVALID) throw UninitializedParameter();
 		      Bfs<Digraph,TR> alg(*reinterpret_cast<const Digraph*>(Base::_g));
 		      if(Base::_reached)
 		        alg.reachedMap(*reinterpret_cast<ReachedMap*>(Base::_reached));
 		      if(Base::_processed)
 		        alg.processedMap(*reinterpret_cast<ProcessedMap*>(Base::_processed));
 		      if(Base::_pred)
 		        alg.predMap(*reinterpret_cast<PredMap*>(Base::_pred));
 		      if(Base::_dist)
 		        alg.distMap(*reinterpret_cast<DistMap*>(Base::_dist));
 		      alg.run(Base::_source);
+		    }
 		    ///Runs Bfs algorithm from the given node.
 		    ///Runs Bfs algorithm from the given node.
 		    ///\param s is the given source.
 		    void run(Node s)
+		    {
 		      Base::_source=s;
 		      run();
+		    }
 		    template<class T>
 		    struct DefPredMapBase : public Base {
 		      typedef T PredMap;
 		      static PredMap *createPredMap(const Digraph &) { return 0; };
 		      DefPredMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-templ-param "Named parameter"
 		    ///function for setting PredMap
 		    ///
 		    /// \ref named-templ-param "Named parameter"
 		    ///function for setting PredMap
 		    ///
 		    template<class T>
 		    BfsWizard<DefPredMapBase<T> > predMap(const T &t)
+		    {
 		      Base::_pred=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return BfsWizard<DefPredMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct DefReachedMapBase : public Base {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &) { return 0; };
 		      DefReachedMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-templ-param "Named parameter"
 		    ///function for setting ReachedMap
 		    ///
 		    /// \ref named-templ-param "Named parameter"
 		    ///function for setting ReachedMap
 		    ///
 		    template<class T>
 		    BfsWizard<DefReachedMapBase<T> > reachedMap(const T &t)
+		    {
 		      Base::_reached=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return BfsWizard<DefReachedMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct DefProcessedMapBase : public Base {
 		      typedef T ProcessedMap;
 		      static ProcessedMap *createProcessedMap(const Digraph &) { return 0; };
 		      DefProcessedMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-templ-param "Named parameter"
 		    ///function for setting ProcessedMap
 		    ///
 		    /// \ref named-templ-param "Named parameter"
 		    ///function for setting ProcessedMap
 		    ///
 		    template<class T>
 		    BfsWizard<DefProcessedMapBase<T> > processedMap(const T &t)
+		    {
 		      Base::_processed=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return BfsWizard<DefProcessedMapBase<T> >(*this);
+		    }
 		    template<class T>
 		    struct DefDistMapBase : public Base {
 		      typedef T DistMap;
 		      static DistMap *createDistMap(const Digraph &) { return 0; };
 		      DefDistMapBase(const TR &b) : TR(b) {}
 		    };
 		    ///\brief \ref named-templ-param "Named parameter"
 		    ///function for setting DistMap type
 		    ///
 		    /// \ref named-templ-param "Named parameter"
 		    ///function for setting DistMap type
 		    ///
 		    template<class T>
 		    BfsWizard<DefDistMapBase<T> > distMap(const T &t)
+		    {
 		      Base::_dist=reinterpret_cast<void*>(const_cast<T*>(&t));
 		      return BfsWizard<DefDistMapBase<T> >(*this);
+		    }
 		    /// Sets the source node, from which the Bfs algorithm runs.
 		    /// Sets the source node, from which the Bfs algorithm runs.
 		    /// \param s is the source node.
 		    BfsWizard<TR> &source(Node s)
+		    {
 		      Base::_source=s;
 		      return *this;
+		    }
 		  };
 		  ///Function type interface for Bfs algorithm.
 		  /// \ingroup search
 		  ///Function type interface for Bfs algorithm.
 		  ///
 		  ///This function also has several
 		  ///\ref named-templ-func-param "named parameters",
 		  ///they are declared as the members of class \ref BfsWizard.
 		  ///The following
 		  ///example shows how to use these parameters.
 		  ///\code
 		  ///  bfs(g,source).predMap(preds).run();
 		  ///\endcode
 		  ///\warning Don't forget to put the \ref BfsWizard::run() "run()"
 		  ///to the end of the parameter list.
 		  ///\sa BfsWizard
 		  ///\sa Bfs
 		  template<class GR>
 		  BfsWizard<BfsWizardBase<GR> >
 		  bfs(const GR &g,typename GR::Node s=INVALID)
+		  {
 		    return BfsWizard<BfsWizardBase<GR> >(g,s);
+		  }
 		#ifdef DOXYGEN
 		  /// \brief Visitor class for bfs.
 		  ///
 		  /// This class defines the interface of the BfsVisit events, and
 		  /// it could be the base of a real Visitor class.
 		  template <typename _Digraph>
 		  struct BfsVisitor {
 		    typedef _Digraph Digraph;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::Node Node;
 		    /// \brief Called when the arc reach a node.
 		    ///
 		    /// It is called when the bfs find an arc which target is not
 		    /// reached yet.
 		    void discover(const Arc& arc) {}
 		    /// \brief Called when the node reached first time.
 		    ///
 		    /// It is Called when the node reached first time.
 		    void reach(const Node& node) {}
 		    /// \brief Called when the arc examined but target of the arc
 		    /// already discovered.
 		    ///
 		    /// It called when the arc examined but the target of the arc
 		    /// already discovered.
 		    void examine(const Arc& arc) {}
 		    /// \brief Called for the source node of the bfs.
 		    ///
 		    /// It is called for the source node of the bfs.
 		    void start(const Node& node) {}
 		    /// \brief Called when the node processed.
 		    ///
 		    /// It is Called when the node processed.
 		    void process(const Node& node) {}
 		  };
 		#else
 		  template <typename _Digraph>
 		  struct BfsVisitor {
 		    typedef _Digraph Digraph;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::Node Node;
 		    void discover(const Arc&) {}
 		    void reach(const Node&) {}
 		    void examine(const Arc&) {}
 		    void start(const Node&) {}
 		    void process(const Node&) {}
 		    template <typename _Visitor>
 		    struct Constraints {
 		      void constraints() {
 		        Arc arc;
 		        Node node;
 		        visitor.discover(arc);
 		        visitor.reach(node);
 		        visitor.examine(arc);
 		        visitor.start(node);
 		        visitor.process(node);
+		      }
 		      _Visitor& visitor;
 		    };
 		  };
 		#endif
 		  /// \brief Default traits class of BfsVisit class.
 		  ///
 		  /// Default traits class of BfsVisit class.
 		  /// \tparam _Digraph Digraph type.
 		  template<class _Digraph>
 		  struct BfsVisitDefaultTraits {
 		    /// \brief The digraph type the algorithm runs on.
 		    typedef _Digraph Digraph;
 		    /// \brief The type of the map that indicates which nodes are reached.
 		    ///
 		    /// The type of the map that indicates which nodes are reached.
 		    /// It must meet the \ref concepts::WriteMap "WriteMap" concept.
 		    /// \todo named parameter to set this type, function to read and write.
 		    typedef typename Digraph::template NodeMap<bool> ReachedMap;
 		    /// \brief Instantiates a ReachedMap.
 		    ///
 		    /// This function instantiates a \ref ReachedMap.
 		    /// \param digraph is the digraph, to which
 		    /// we would like to define the \ref ReachedMap.
 		    static ReachedMap *createReachedMap(const Digraph &digraph) {
 		      return new ReachedMap(digraph);
+		    }
 		  };
 		  /// \ingroup search
 		  ///
 		  /// \brief %BFS Visit algorithm class.
 		  ///
 		  /// This class provides an efficient implementation of the %BFS algorithm
 		  /// with visitor interface.
 		  ///
 		  /// The %BfsVisit class provides an alternative interface to the Bfs
 		  /// class. It works with callback mechanism, the BfsVisit object calls
 		  /// on every bfs event the \c Visitor class member functions.
 		  ///
 		  /// \tparam _Digraph The digraph type the algorithm runs on.
 		  /// The default value is
 		  /// \ref ListDigraph. The value of _Digraph is not used directly by Bfs, it
 		  /// is only passed to \ref BfsDefaultTraits.
 		  /// \tparam _Visitor The Visitor object for the algorithm. The
 		  /// \ref BfsVisitor "BfsVisitor<_Digraph>" is an empty Visitor which
 		  /// does not observe the Bfs events. If you want to observe the bfs
 		  /// events you should implement your own Visitor class.
 		  /// \tparam _Traits Traits class to set various data types used by the
 		  /// algorithm. The default traits class is
 		  /// \ref BfsVisitDefaultTraits "BfsVisitDefaultTraits<_Digraph>".
 		  /// See \ref BfsVisitDefaultTraits for the documentation of
 		  /// a Bfs visit traits class.
 		#ifdef DOXYGEN
 		  template <typename _Digraph, typename _Visitor, typename _Traits>
 		#else
 		  template <typename _Digraph = ListDigraph,
 		            typename _Visitor = BfsVisitor<_Digraph>,
 		            typename _Traits = BfsDefaultTraits<_Digraph> >
 		#endif
 		  class BfsVisit {
 		  public:
 		    /// \brief \ref Exception for uninitialized parameters.
 		    ///
 		    /// This error represents problems in the initialization
 		    /// of the parameters of the algorithms.
 		    class UninitializedParameter : public lemon::UninitializedParameter {
 		    public:
 		      virtual const char* what() const throw()
+		      {
 		        return "lemon::BfsVisit::UninitializedParameter";
+		      }
 		    };
 		    typedef _Traits Traits;
 		    typedef typename Traits::Digraph Digraph;
 		    typedef _Visitor Visitor;
 		    ///The type of the map indicating which nodes are reached.
 		    typedef typename Traits::ReachedMap ReachedMap;
 		  private:
 		    typedef typename Digraph::Node Node;
 		    typedef typename Digraph::NodeIt NodeIt;
 		    typedef typename Digraph::Arc Arc;
 		    typedef typename Digraph::OutArcIt OutArcIt;
 		    /// Pointer to the underlying digraph.
 		    const Digraph *_digraph;
 		    /// Pointer to the visitor object.
 		    Visitor *_visitor;
 		    ///Pointer to the map of reached status of the nodes.
 		    ReachedMap *_reached;
 		    ///Indicates if \ref _reached is locally allocated (\c true) or not.
 		    bool local_reached;
 		    std::vector<typename Digraph::Node> _list;
 		    int _list_front, _list_back;
 		    /// \brief Creates the maps if necessary.
 		    ///
 		    /// Creates the maps if necessary.
 		    void create_maps() {
 		      if(!_reached) {
 		        local_reached = true;
 		        _reached = Traits::createReachedMap(*_digraph);
+		      }
+		    }
 		  protected:
 		    BfsVisit() {}
 		  public:
 		    typedef BfsVisit Create;
 		    /// \name Named template parameters
 		    ///@{
 		    template <class T>
 		    struct DefReachedMapTraits : public Traits {
 		      typedef T ReachedMap;
 		      static ReachedMap *createReachedMap(const Digraph &digraph) {
 		        throw UninitializedParameter();
+		      }
 		    };
 		    /// \brief \ref named-templ-param "Named parameter" for setting
 		    /// ReachedMap type
 		    ///
 		    /// \ref named-templ-param "Named parameter" for setting ReachedMap type
 		    template <class T>
 		    struct DefReachedMap : public BfsVisit< Digraph, Visitor,
 		                                            DefReachedMapTraits<T> > {
 		      typedef BfsVisit< Digraph, Visitor, DefReachedMapTraits<T> > Create;
 		    };
 		    ///@}
 		  public:
 		    /// \brief Constructor.
 		    ///
 		    /// Constructor.
 		    ///
 		    /// \param digraph the digraph the algorithm will run on.
 		    /// \param visitor The visitor of the algorithm.
 		    ///
 		    BfsVisit(const Digraph& digraph, Visitor& visitor)
 		      : _digraph(&digraph), _visitor(&visitor),
 		        _reached(0), local_reached(false) {}
 		    /// \brief Destructor.
 		    ///
 		    /// Destructor.
 		    ~BfsVisit() {
 		      if(local_reached) delete _reached;
+		    }
 		    /// \brief Sets the map indicating if a node is reached.
 		    ///
 		    /// Sets the map indicating if a node is reached.
 		    /// If you don't use this function before calling \ref run(),
 		    /// it will allocate one. The destuctor deallocates this
 		    /// automatically allocated map, of course.
 		    /// \return <tt> (*this) </tt>
 		    BfsVisit &reachedMap(ReachedMap &m) {
 		      if(local_reached) {
 		        delete _reached;
 		        local_reached = false;
+		      }
 		      _reached = &m;
 		      return *this;
+		    }
 		  public:
 		    /// \name Execution control
 		    /// The simplest way to execute the algorithm is to use
 		    /// one of the member functions called \c run(...).
 		    /// \n
 		    /// If you need more control on the execution,
 		    /// first you must call \ref init(), then you can adda source node
 		    /// with \ref addSource().
 		    /// Finally \ref start() will perform the actual path
 		    /// computation.
 		    /// @{
 		    /// \brief Initializes the internal data structures.
 		    ///
 		    /// Initializes the internal data structures.
 		    ///
 		    void init() {
 		      create_maps();
 		      _list.resize(countNodes(*_digraph));
 		      _list_front = _list_back = -1;
 		      for (NodeIt u(*_digraph) ; u != INVALID ; ++u) {
 		        _reached->set(u, false);
+		      }
+		    }
 		    /// \brief Adds a new source node.
 		    ///
 		    /// Adds a new source node to the set of nodes to be processed.
 		    void addSource(Node s) {
 		      if(!(*_reached)[s]) {
 		          _reached->set(s,true);
 		          _visitor->start(s);
 		          _visitor->reach(s);
 		          _list[++_list_back] = s;
+		        }
+		    }
 		    /// \brief Processes the next node.
 		    ///
 		    /// Processes the next node.
 		    ///
 		    /// \return The processed node.
 		    ///
 		    /// \pre The queue must not be empty!
 		    Node processNextNode() {
 		      Node n = _list[++_list_front];
 		      _visitor->process(n);
 		      Arc e;
 		      for (_digraph->firstOut(e, n); e != INVALID; _digraph->nextOut(e)) {
 		        Node m = _digraph->target(e);
 		        if (!(*_reached)[m]) {
 		          _visitor->discover(e);
 		          _visitor->reach(m);
 		          _reached->set(m, true);
 		          _list[++_list_back] = m;
 		        } else {
 		          _visitor->examine(e);
+		        }
+		      }
 		      return n;
+		    }
 		    /// \brief Processes the next node.
 		    ///
 		    /// Processes the next node. And checks that the given target node
 		    /// is reached. If the target node is reachable from the processed
 		    /// node then the reached parameter will be set true. The reached
 		    /// parameter should be initially false.
 		    ///
 		    /// \param target The target node.
 		    /// \retval reach Indicates that the target node is reached.
 		    /// \return The processed node.
 		    ///
 		    /// \warning The queue must not be empty!
 		    Node processNextNode(Node target, bool& reach) {
 		      Node n = _list[++_list_front];
 		      _visitor->process(n);
 		      Arc e;
 		      for (_digraph->firstOut(e, n); e != INVALID; _digraph->nextOut(e)) {
 		        Node m = _digraph->target(e);
 		        if (!(*_reached)[m]) {
 		          _visitor->discover(e);
 		          _visitor->reach(m);
 		          _reached->set(m, true);
 		          _list[++_list_back] = m;
 		          reach = reach || (target == m);
 		        } else {
 		          _visitor->examine(e);
+		        }
+		      }
 		      return n;
+		    }
 		    /// \brief Processes the next node.
 		    ///
 		    /// Processes the next node. And checks that at least one of
 		    /// reached node has true value in the \c nm node map. If one node
 		    /// with true value is reachable from the processed node then the
 		    /// rnode parameter will be set to the first of such nodes.
 		    ///
 		    /// \param nm The node map of possible targets.
 		    /// \retval rnode The reached target node.
 		    /// \return The processed node.
 		    ///
 		    /// \warning The queue must not be empty!
 		    template <typename NM>
 		    Node processNextNode(const NM& nm, Node& rnode) {
 		      Node n = _list[++_list_front];
 		      _visitor->process(n);
 		      Arc e;
 		      for (_digraph->firstOut(e, n); e != INVALID; _digraph->nextOut(e)) {
 		        Node m = _digraph->target(e);
 		        if (!(*_reached)[m]) {
 		          _visitor->discover(e);
 		          _visitor->reach(m);
 		          _reached->set(m, true);
 		          _list[++_list_back] = m;
 		          if (nm[m] && rnode == INVALID) rnode = m;
 		        } else {
 		          _visitor->examine(e);
+		        }
+		      }
 		      return n;
+		    }
 		    /// \brief Next node to be processed.
 		    ///
 		    /// Next node to be processed.
 		    ///
 		    /// \return The next node to be processed or INVALID if the stack is
 		    /// empty.
 		    Node nextNode() {
 		      return _list_front != _list_back ? _list[_list_front + 1] : INVALID;
+		    }
 		    /// \brief Returns \c false if there are nodes
 		    /// to be processed in the queue
 		    ///
 		    /// Returns \c false if there are nodes
 		    /// to be processed in the queue
 		    bool emptyQueue() { return _list_front == _list_back; }
 		    /// \brief Returns the number of the nodes to be processed.
 		    ///
 		    /// Returns the number of the nodes to be processed in the queue.
 		    int queueSize() { return _list_back - _list_front; }
 		    /// \brief Executes the algorithm.
 		    ///
 		    /// Executes the algorithm.
 		    ///
 		    /// \pre init() must be called and at least one node should be added
 		    /// with addSource() before using this function.
 		    void start() {
 		      while ( !emptyQueue() ) processNextNode();
+		    }
 		    /// \brief Executes the algorithm until \c dest is reached.
 		    ///
 		    /// Executes the algorithm until \c dest is reached.
 		    ///
 		    /// \pre init() must be called and at least one node should be added
 		    /// with addSource() before using this function.
 		    void start(Node dest) {
 		      bool reach = false;
 		      while ( !emptyQueue() && !reach ) processNextNode(dest, reach);
+		    }
 		    /// \brief Executes the algorithm until a condition is met.
 		    ///
 		    /// Executes the algorithm until a condition is met.
 		    ///
 		    /// \pre init() must be called and at least one node should be added
 		    /// with addSource() before using this function.
 		    ///
 		    ///\param nm must be a bool (or convertible) node map. The
 		    ///algorithm will stop when it reaches a node \c v with
 		    /// <tt>nm[v]</tt> true.
 		    ///
 		    ///\return The reached node \c v with <tt>nm[v]</tt> true or
 		    ///\c INVALID if no such node was found.
 		    template <typename NM>
 		    Node start(const NM &nm) {
 		      Node rnode = INVALID;
 		      while ( !emptyQueue() && rnode == INVALID ) {
 		        processNextNode(nm, rnode);
+		      }
 		      return rnode;
+		    }
 		    /// \brief Runs %BFSVisit algorithm from node \c s.
 		    ///
 		    /// This method runs the %BFS algorithm from a root node \c s.
 		    /// \note b.run(s) is just a shortcut of the following code.
 		    ///\code
 		    ///   b.init();
 		    ///   b.addSource(s);
 		    ///   b.start();
 		    ///\endcode
 		    void run(Node s) {
 		      init();
 		      addSource(s);
 		      start();
+		    }
 		    /// \brief Runs %BFSVisit algorithm to visit all nodes in the digraph.
 		    ///
 		    /// This method runs the %BFS algorithm in order to
 		    /// compute the %BFS path to each node. The algorithm computes
 		    /// - The %BFS tree.
 		    /// - The distance of each node from the root in the %BFS tree.
 		    ///
 		    ///\note b.run() is just a shortcut of the following code.
 		    ///\code
 		    ///  b.init();
 		    ///  for (NodeIt it(digraph); it != INVALID; ++it) {
 		    ///    if (!b.reached(it)) {
 		    ///      b.addSource(it);
 		    ///      b.start();
 		    ///    }
 		    ///  }
 		    ///\endcode
 		    void run() {
 		      init();

lemon/bits/alteration_notifier.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_BITS_ALTERATION_NOTIFIER_H
 		#define LEMON_BITS_ALTERATION_NOTIFIER_H
 		#include <vector>
 		#include <list>
-		#include <lemon/bits/utility.h>
+		#include <lemon/core.h>
 		///\ingroup graphbits
 		///\file
 		///\brief Observer notifier for graph alteration observers.
 		namespace lemon {
 		  /// \ingroup graphbits
 		  ///
 		  /// \brief Notifier class to notify observes about alterations in
 		  /// a container.
 		  ///
 		  /// The simple graph's can be refered as two containers, one node container
 		  /// and one edge container. But they are not standard containers they
 		  /// does not store values directly they are just key continars for more
 		  /// value containers which are the node and edge maps.
 		  ///
 		  /// The graph's node and edge sets can be changed as we add or erase
 		  /// nodes and edges in the graph. Lemon would like to handle easily
 		  /// that the node and edge maps should contain values for all nodes or
 		  /// edges. If we want to check on every indicing if the map contains
 		  /// the current indicing key that cause a drawback in the performance
 		  /// in the library. We use another solution we notify all maps about
 		  /// an alteration in the graph, which cause only drawback on the
 		  /// alteration of the graph.
 		  ///
 		  /// This class provides an interface to the container. The \e first() and \e
 		  /// next() member functions make possible to iterate on the keys of the
 		  /// container. The \e id() function returns an integer id for each key.
 		  /// The \e maxId() function gives back an upper bound of the ids.
 		  ///
 		  /// For the proper functonality of this class, we should notify it
 		  /// about each alteration in the container. The alterations have four type
 		  /// as \e add(), \e erase(), \e build() and \e clear(). The \e add() and
 		  /// \e erase() signals that only one or few items added or erased to or
 		  /// from the graph. If all items are erased from the graph or from an empty
 		  /// graph a new graph is builded then it can be signaled with the
 		  /// clear() and build() members. Important rule that if we erase items
 		  /// from graph we should first signal the alteration and after that erase
 		  /// them from the container, on the other way on item addition we should
 		  /// first extend the container and just after that signal the alteration.
 		  ///
 		  /// The alteration can be observed with a class inherited from the
 		  /// \e ObserverBase nested class. The signals can be handled with
 		  /// overriding the virtual functions defined in the base class.  The
 		  /// observer base can be attached to the notifier with the
 		  /// \e attach() member and can be detached with detach() function. The
 		  /// alteration handlers should not call any function which signals
 		  /// an other alteration in the same notifier and should not
 		  /// detach any observer from the notifier.
 		  ///
 		  /// Alteration observers try to be exception safe. If an \e add() or
 		  /// a \e clear() function throws an exception then the remaining
 		  /// observeres will not be notified and the fulfilled additions will
 		  /// be rolled back by calling the \e erase() or \e clear()
 		  /// functions. Thence the \e erase() and \e clear() should not throw
 		  /// exception. Actullay, it can be throw only
 		  /// \ref AlterationObserver::ImmediateDetach ImmediateDetach
 		  /// exception which detach the observer from the notifier.
 		  ///
 		  /// There are some place when the alteration observing is not completly
 		  /// reliable. If we want to carry out the node degree in the graph
 		  /// as in the \ref InDegMap and we use the reverseEdge that cause
 		  /// unreliable functionality. Because the alteration observing signals
 		  /// only erasing and adding but not the reversing it will stores bad
 		  /// degrees. The sub graph adaptors cannot signal the alterations because
 		  /// just a setting in the filter map can modify the graph and this cannot
 		  /// be watched in any way.
 		  ///
 		  /// \param _Container The container which is observed.
 		  /// \param _Item The item type which is obserbved.
 		  template <typename _Container, typename _Item>
 		  class AlterationNotifier {
 		  public:
 		    typedef True Notifier;
 		    typedef _Container Container;
 		    typedef _Item Item;
 		    /// \brief Exception which can be called from \e clear() and
 		    /// \e erase().
 		    ///
 		    /// From the \e clear() and \e erase() function only this
 		    /// exception is allowed to throw. The exception immediatly
 		    /// detaches the current observer from the notifier. Because the
 		    /// \e clear() and \e erase() should not throw other exceptions
 		    /// it can be used to invalidate the observer.
 		    struct ImmediateDetach {};
 		    /// \brief ObserverBase is the base class for the observers.
 		    ///
 		    /// ObserverBase is the abstract base class for the observers.
 		    /// It will be notified about an item was inserted into or
 		    /// erased from the graph.
 		    ///
 		    /// The observer interface contains some pure virtual functions
 		    /// to override. The add() and erase() functions are
 		    /// to notify the oberver when one item is added or
 		    /// erased.
 		    ///
 		    /// The build() and clear() members are to notify the observer
 		    /// about the container is built from an empty container or
 		    /// is cleared to an empty container.
 		    class ObserverBase {
 		    protected:
 		      typedef AlterationNotifier Notifier;
 		      friend class AlterationNotifier;
 		      /// \brief Default constructor.
 		      ///
 		      /// Default constructor for ObserverBase.
 		      ///
 		      ObserverBase() : _notifier(0) {}
 		      /// \brief Constructor which attach the observer into notifier.
 		      ///
 		      /// Constructor which attach the observer into notifier.
 		      ObserverBase(AlterationNotifier& nf) {
 		        attach(nf);
+		      }
 		      /// \brief Constructor which attach the obserever to the same notifier.
 		      ///
 		      /// Constructor which attach the obserever to the same notifier as
 		      /// the other observer is attached to.
 		      ObserverBase(const ObserverBase& copy) {
 		        if (copy.attached()) {
 		          attach(*copy.notifier());
+		        }
+		      }
 		      /// \brief Destructor
 		      virtual ~ObserverBase() {
 		        if (attached()) {
 		          detach();
+		        }
+		      }
 		      /// \brief Attaches the observer into an AlterationNotifier.
 		      ///
 		      /// This member attaches the observer into an AlterationNotifier.
 		      ///
 		      void attach(AlterationNotifier& nf) {
 		        nf.attach(*this);
+		      }
 		      /// \brief Detaches the observer into an AlterationNotifier.
 		      ///
 		      /// This member detaches the observer from an AlterationNotifier.
 		      ///
 		      void detach() {
 		        _notifier->detach(*this);
+		      }
 		      /// \brief Gives back a pointer to the notifier which the map
 		      /// attached into.
 		      ///
 		      /// This function gives back a pointer to the notifier which the map
 		      /// attached into.
 		      ///
 		      Notifier* notifier() const { return const_cast<Notifier*>(_notifier); }
 		      /// Gives back true when the observer is attached into a notifier.
 		      bool attached() const { return _notifier != 0; }
 		    private:
 		      ObserverBase& operator=(const ObserverBase& copy);
 		    protected:
 		      Notifier* _notifier;
 		      typename std::list<ObserverBase*>::iterator _index;
 		      /// \brief The member function to notificate the observer about an
 		      /// item is added to the container.
 		      ///
 		      /// The add() member function notificates the observer about an item
 		      /// is added to the container. It have to be overrided in the
 		      /// subclasses.
 		      virtual void add(const Item&) = 0;
 		      /// \brief The member function to notificate the observer about
 		      /// more item is added to the container.
 		      ///
 		      /// The add() member function notificates the observer about more item
 		      /// is added to the container. It have to be overrided in the
 		      /// subclasses.
 		      virtual void add(const std::vector<Item>& items) = 0;
 		      /// \brief The member function to notificate the observer about an
 		      /// item is erased from the container.
 		      ///
 		      /// The erase() member function notificates the observer about an
 		      /// item is erased from the container. It have to be overrided in
 		      /// the subclasses.
 		      virtual void erase(const Item&) = 0;
 		      /// \brief The member function to notificate the observer about
 		      /// more item is erased from the container.
 		      ///
 		      /// The erase() member function notificates the observer about more item
 		      /// is erased from the container. It have to be overrided in the
 		      /// subclasses.
 		      virtual void erase(const std::vector<Item>& items) = 0;
 		      /// \brief The member function to notificate the observer about the
 		      /// container is built.
 		      ///
 		      /// The build() member function notificates the observer about the
 		      /// container is built from an empty container. It have to be
 		      /// overrided in the subclasses.
 		      virtual void build() = 0;
 		      /// \brief The member function to notificate the observer about all
 		      /// items are erased from the container.
 		      ///
 		      /// The clear() member function notificates the observer about all
 		      /// items are erased from the container. It have to be overrided in
 		      /// the subclasses.
 		      virtual void clear() = 0;
 		    };
 		  protected:
 		    const Container* container;
 		    typedef std::list<ObserverBase*> Observers;
 		    Observers _observers;
 		  public:
 		    /// \brief Default constructor.
 		    ///
 		    /// The default constructor of the AlterationNotifier.
 		    /// It creates an empty notifier.
 		    AlterationNotifier()
 		      : container(0) {}
 		    /// \brief Constructor.
 		    ///
 		    /// Constructor with the observed container parameter.
 		    AlterationNotifier(const Container& _container)
 		      : container(&_container) {}
 		    /// \brief Copy Constructor of the AlterationNotifier.
 		    ///
 		    /// Copy constructor of the AlterationNotifier.
 		    /// It creates only an empty notifier because the copiable
 		    /// notifier's observers have to be registered still into that notifier.
 		    AlterationNotifier(const AlterationNotifier& _notifier)
 		      : container(_notifier.container) {}
 		    /// \brief Destructor.
 		    ///
 		    /// Destructor of the AlterationNotifier.
 		    ///
 		    ~AlterationNotifier() {
 		      typename Observers::iterator it;
 		      for (it = _observers.begin(); it != _observers.end(); ++it) {
 		        (*it)->_notifier = 0;
+		      }
+		    }
 		    /// \brief Sets the container.
 		    ///
 		    /// Sets the container.
 		    void setContainer(const Container& _container) {
 		      container = &_container;
+		    }
 		  protected:
 		    AlterationNotifier& operator=(const AlterationNotifier&);
 		  public:
 		    /// \brief First item in the container.
 		    ///
 		    /// Returns the first item in the container. It is
 		    /// for start the iteration on the container.
 		    void first(Item& item) const {
 		      container->first(item);
+		    }
 		    /// \brief Next item in the container.
 		    ///
 		    /// Returns the next item in the container. It is
 		    /// for iterate on the container.
 		    void next(Item& item) const {
 		      container->next(item);
+		    }
 		    /// \brief Returns the id of the item.
 		    ///
 		    /// Returns the id of the item provided by the container.
 		    int id(const Item& item) const {
 		      return container->id(item);
+		    }
 		    /// \brief Returns the maximum id of the container.
 		    ///
 		    /// Returns the maximum id of the container.
 		    int maxId() const {
 		      return container->maxId(Item());
+		    }
 		  protected:
 		    void attach(ObserverBase& observer) {
 		      observer._index = _observers.insert(_observers.begin(), &observer);
 		      observer._notifier = this;
+		    }
 		    void detach(ObserverBase& observer) {
 		      _observers.erase(observer._index);
 		      observer._index = _observers.end();
 		      observer._notifier = 0;
+		    }
 		  public:
 		    /// \brief Notifies all the registed observers about an item added to
 		    /// the container.
 		    ///
 		    /// It notifies all the registed observers about an item added to
 		    /// the container.
 		    ///
 		    void add(const Item& item) {
 		      typename Observers::reverse_iterator it;
 		      try {
 		        for (it = _observers.rbegin(); it != _observers.rend(); ++it) {
 		          (*it)->add(item);
+		        }
 		      } catch (...) {
 		        typename Observers::iterator jt;
 		        for (jt = it.base(); jt != _observers.end(); ++jt) {
 		          (*jt)->erase(item);
+		        }
 		        throw;
+		      }
+		    }
 		    /// \brief Notifies all the registed observers about more item added to
 		    /// the container.
 		    ///
 		    /// It notifies all the registed observers about more item added to
 		    /// the container.
 		    ///
 		    void add(const std::vector<Item>& items) {
 		      typename Observers::reverse_iterator it;
 		      try {
 		        for (it = _observers.rbegin(); it != _observers.rend(); ++it) {
 		          (*it)->add(items);
+		        }
 		      } catch (...) {
 		        typename Observers::iterator jt;
 		        for (jt = it.base(); jt != _observers.end(); ++jt) {
 		          (*jt)->erase(items);
+		        }
 		        throw;
+		      }
+		    }
 		    /// \brief Notifies all the registed observers about an item erased from
 		    /// the container.
 		    ///
 		    /// It notifies all the registed observers about an item erased from
 		    /// the container.
 		    ///
 		    void erase(const Item& item) throw() {
 		      typename Observers::iterator it = _observers.begin();
 		      while (it != _observers.end()) {
 		        try {
 		          (*it)->erase(item);
 		          ++it;
 		        } catch (const ImmediateDetach&) {
 		          it = _observers.erase(it);
 		          (*it)->_index = _observers.end();
 		          (*it)->_notifier = 0;
+		        }
+		      }
+		    }
 		    /// \brief Notifies all the registed observers about more item erased
 		    /// from the container.
 		    ///
 		    /// It notifies all the registed observers about more item erased from
 		    /// the container.
 		    ///
 		    void erase(const std::vector<Item>& items) {
 		      typename Observers::iterator it = _observers.begin();
 		      while (it != _observers.end()) {
 		        try {
 		          (*it)->erase(items);
 		          ++it;
 		        } catch (const ImmediateDetach&) {
 		          it = _observers.erase(it);
 		          (*it)->_index = _observers.end();
 		          (*it)->_notifier = 0;
+		        }
+		      }
+		    }
 		    /// \brief Notifies all the registed observers about the container is
 		    /// built.
 		    ///
 		    /// Notifies all the registed observers about the container is built
 		    /// from an empty container.
 		    void build() {
 		      typename Observers::reverse_iterator it;
 		      try {
 		        for (it = _observers.rbegin(); it != _observers.rend(); ++it) {
 		          (*it)->build();
+		        }
 		      } catch (...) {
 		        typename Observers::iterator jt;
 		        for (jt = it.base(); jt != _observers.end(); ++jt) {
 		          (*jt)->clear();
+		        }
 		        throw;
+		      }
+		    }
 		    /// \brief Notifies all the registed observers about all items are
 		    /// erased.
 		    ///
 		    /// Notifies all the registed observers about all items are erased
 		    /// from the container.
 		    void clear() {
 		      typename Observers::iterator it = _observers.begin();
 		      while (it != _observers.end()) {
 		        try {
 		          (*it)->clear();
 		          ++it;
 		        } catch (const ImmediateDetach&) {
 		          it = _observers.erase(it);
 		          (*it)->_index = _observers.end();
 		          (*it)->_notifier = 0;
+		        }
+		      }
+		    }
 		  };
+		}
 		#endif

lemon/bits/base_extender.h

Show inline comments

/* -*- mode: C++; indent-tabs-mode: nil; -*-
 *
 * This file is a part of LEMON, a generic C++ optimization library.
 *
 * Copyright (C) 2003-2008
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
 *
 * Permission to use, modify and distribute this software is granted
 * provided that this copyright notice appears in all copies. For
 * precise terms see the accompanying LICENSE file.
 *
 * This software is provided "AS IS" with no warranty of any kind,
 * express or implied, and with no claim as to its suitability for any
 * purpose.
 *
 */

#ifndef LEMON_BITS_BASE_EXTENDER_H
#define LEMON_BITS_BASE_EXTENDER_H

#include <lemon/bits/invalid.h>
#include <lemon/core.h>
#include <lemon/error.h>

#include <lemon/bits/map_extender.h>
#include <lemon/bits/default_map.h>

#include <lemon/concept_check.h>
#include <lemon/concepts/maps.h>

///\ingroup digraphbits
///\file
///\brief Extenders for the digraph types
namespace lemon {

  /// \ingroup digraphbits
  ///
  /// \brief BaseDigraph to BaseGraph extender
  template <typename Base>
  class UndirDigraphExtender : public Base {

  public:

    typedef Base Parent;
    typedef typename Parent::Arc Edge;
    typedef typename Parent::Node Node;

    typedef True UndirectedTag;

    class Arc : public Edge {
      friend class UndirDigraphExtender;

    protected:
      bool forward;

      Arc(const Edge &ue, bool _forward) :
        Edge(ue), forward(_forward) {}

    public:
      Arc() {}

      /// Invalid arc constructor
      Arc(Invalid i) : Edge(i), forward(true) {}

      bool operator==(const Arc &that) const {
        return forward==that.forward && Edge(*this)==Edge(that);
      }
      bool operator!=(const Arc &that) const {
        return forward!=that.forward || Edge(*this)!=Edge(that);
      }
      bool operator<(const Arc &that) const {
        return forward<that.forward ||
          (!(that.forward<forward) && Edge(*this)<Edge(that));
      }
    };



    using Parent::source;

    /// Source of the given Arc.
    Node source(const Arc &e) const {
      return e.forward ? Parent::source(e) : Parent::target(e);
    }

    using Parent::target;

    /// Target of the given Arc.
    Node target(const Arc &e) const {
      return e.forward ? Parent::target(e) : Parent::source(e);
    }

    /// \brief Directed arc from an edge.
    ///
    /// Returns a directed arc corresponding to the specified Edge.
    /// If the given bool is true the given edge and the
    /// returned arc have the same source node.
    static Arc direct(const Edge &ue, bool d) {
      return Arc(ue, d);
    }

    /// Returns whether the given directed arc is same orientation as the
    /// corresponding edge.
    ///
    /// \todo reference to the corresponding point of the undirected digraph
    /// concept. "What does the direction of an edge mean?"
    static bool direction(const Arc &e) { return e.forward; }


    using Parent::first;
    using Parent::next;

    void first(Arc &e) const {
      Parent::first(e);
      e.forward=true;
    }

    void next(Arc &e) const {
      if( e.forward ) {
        e.forward = false;
      }
      else {
        Parent::next(e);
        e.forward = true;
      }
    }

    void firstOut(Arc &e, const Node &n) const {
      Parent::firstIn(e,n);
      if( Edge(e) != INVALID ) {
        e.forward = false;
      }
      else {
        Parent::firstOut(e,n);
        e.forward = true;
      }
    }
    void nextOut(Arc &e) const {
      if( ! e.forward ) {
        Node n = Parent::target(e);
        Parent::nextIn(e);
        if( Edge(e) == INVALID ) {
          Parent::firstOut(e, n);
          e.forward = true;
        }
      }
      else {
        Parent::nextOut(e);
      }
    }

    void firstIn(Arc &e, const Node &n) const {
      Parent::firstOut(e,n);
      if( Edge(e) != INVALID ) {
        e.forward = false;
      }
      else {
        Parent::firstIn(e,n);
        e.forward = true;
      }
    }
    void nextIn(Arc &e) const {
      if( ! e.forward ) {
        Node n = Parent::source(e);
        Parent::nextOut(e);
        if( Edge(e) == INVALID ) {
          Parent::firstIn(e, n);
          e.forward = true;
        }
      }
      else {
        Parent::nextIn(e);
      }
    }

    void firstInc(Edge &e, bool &d, const Node &n) const {
      d = true;
      Parent::firstOut(e, n);
      if (e != INVALID) return;
      d = false;
      Parent::firstIn(e, n);
    }

    void nextInc(Edge &e, bool &d) const {
      if (d) {
        Node s = Parent::source(e);
        Parent::nextOut(e);
        if (e != INVALID) return;
        d = false;
        Parent::firstIn(e, s);
      } else {
        Parent::nextIn(e);
      }
    }

    Node nodeFromId(int ix) const {
      return Parent::nodeFromId(ix);
    }

    Arc arcFromId(int ix) const {
      return direct(Parent::arcFromId(ix >> 1), bool(ix & 1));
    }

    Edge edgeFromId(int ix) const {
      return Parent::arcFromId(ix);
    }

    int id(const Node &n) const {
      return Parent::id(n);
    }

    int id(const Edge &e) const {
      return Parent::id(e);
    }

    int id(const Arc &e) const {
      return 2 * Parent::id(e) + int(e.forward);
    }

    int maxNodeId() const {
      return Parent::maxNodeId();
    }

    int maxArcId() const {
      return 2 * Parent::maxArcId() + 1;
    }

    int maxEdgeId() const {
      return Parent::maxArcId();
    }


    int arcNum() const {
      return 2 * Parent::arcNum();
    }

    int edgeNum() const {
      return Parent::arcNum();
    }

    Arc findArc(Node s, Node t, Arc p = INVALID) const {
      if (p == INVALID) {
        Edge arc = Parent::findArc(s, t);
        if (arc != INVALID) return direct(arc, true);
        arc = Parent::findArc(t, s);
        if (arc != INVALID) return direct(arc, false);
      } else if (direction(p)) {
        Edge arc = Parent::findArc(s, t, p);
        if (arc != INVALID) return direct(arc, true);
        arc = Parent::findArc(t, s);
        if (arc != INVALID) return direct(arc, false);
      } else {
        Edge arc = Parent::findArc(t, s, p);
        if (arc != INVALID) return direct(arc, false);
      }
      return INVALID;
    }

    Edge findEdge(Node s, Node t, Edge p = INVALID) const {
      if (s != t) {
        if (p == INVALID) {
          Edge arc = Parent::findArc(s, t);
          if (arc != INVALID) return arc;
          arc = Parent::findArc(t, s);
          if (arc != INVALID) return arc;
        } else if (Parent::s(p) == s) {
          Edge arc = Parent::findArc(s, t, p);
          if (arc != INVALID) return arc;
          arc = Parent::findArc(t, s);
          if (arc != INVALID) return arc;
        } else {
          Edge arc = Parent::findArc(t, s, p);
          if (arc != INVALID) return arc;
        }
      } else {
        return Parent::findArc(s, t, p);
      }
      return INVALID;
    }
  };

  template <typename Base>
  class BidirBpGraphExtender : public Base {
  public:
    typedef Base Parent;
    typedef BidirBpGraphExtender Digraph;

    typedef typename Parent::Node Node;
    typedef typename Parent::Edge Edge;


    using Parent::first;
    using Parent::next;

    using Parent::id;

    class Red : public Node {
      friend class BidirBpGraphExtender;
    public:
      Red() {}
      Red(const Node& node) : Node(node) {
        LEMON_ASSERT(Parent::red(node) || node == INVALID,
                     typename Parent::NodeSetError());
      }
      Red& operator=(const Node& node) {
        LEMON_ASSERT(Parent::red(node) || node == INVALID,
                     typename Parent::NodeSetError());
        Node::operator=(node);
        return *this;
      }
      Red(Invalid) : Node(INVALID) {}
      Red& operator=(Invalid) {
        Node::operator=(INVALID);
        return *this;
      }
    };

    void first(Red& node) const {
      Parent::firstRed(static_cast<Node&>(node));
    }
    void next(Red& node) const {
      Parent::nextRed(static_cast<Node&>(node));
    }

    int id(const Red& node) const {
      return Parent::redId(node);
    }

    class Blue : public Node {
      friend class BidirBpGraphExtender;
    public:
      Blue() {}
      Blue(const Node& node) : Node(node) {
        LEMON_ASSERT(Parent::blue(node) || node == INVALID,
                     typename Parent::NodeSetError());
      }
      Blue& operator=(const Node& node) {
        LEMON_ASSERT(Parent::blue(node) || node == INVALID,
                     typename Parent::NodeSetError());
        Node::operator=(node);
        return *this;
      }
      Blue(Invalid) : Node(INVALID) {}
      Blue& operator=(Invalid) {
        Node::operator=(INVALID);
        return *this;
      }
    };

    void first(Blue& node) const {
      Parent::firstBlue(static_cast<Node&>(node));
    }
    void next(Blue& node) const {
      Parent::nextBlue(static_cast<Node&>(node));
    }

    int id(const Blue& node) const {
      return Parent::redId(node);
    }

    Node source(const Edge& arc) const {
      return red(arc);
    }
    Node target(const Edge& arc) const {
      return blue(arc);
    }

    void firstInc(Edge& arc, bool& dir, const Node& node) const {
      if (Parent::red(node)) {
        Parent::firstFromRed(arc, node);
        dir = true;
      } else {
        Parent::firstFromBlue(arc, node);
        dir = static_cast<Edge&>(arc) == INVALID;
      }
    }
    void nextInc(Edge& arc, bool& dir) const {
      if (dir) {
        Parent::nextFromRed(arc);
      } else {
        Parent::nextFromBlue(arc);
        if (arc == INVALID) dir = true;
      }
    }

    class Arc : public Edge {
      friend class BidirBpGraphExtender;
    protected:
      bool forward;

      Arc(const Edge& arc, bool _forward)
        : Edge(arc), forward(_forward) {}

    public:
      Arc() {}
      Arc (Invalid) : Edge(INVALID), forward(true) {}
      bool operator==(const Arc& i) const {
        return Edge::operator==(i) && forward == i.forward;
      }
      bool operator!=(const Arc& i) const {
        return Edge::operator!=(i) || forward != i.forward;
      }
      bool operator<(const Arc& i) const {
        return Edge::operator<(i) ||
          (!(i.forward<forward) && Edge(*this)<Edge(i));
      }
    };

    void first(Arc& arc) const {
      Parent::first(static_cast<Edge&>(arc));
      arc.forward = true;
    }

    void next(Arc& arc) const {
      if (!arc.forward) {
        Parent::next(static_cast<Edge&>(arc));
      }
      arc.forward = !arc.forward;
    }

    void firstOut(Arc& arc, const Node& node) const {
      if (Parent::red(node)) {
        Parent::firstFromRed(arc, node);
        arc.forward = true;
      } else {
        Parent::firstFromBlue(arc, node);
        arc.forward = static_cast<Edge&>(arc) == INVALID;
      }
    }
    void nextOut(Arc& arc) const {
      if (arc.forward) {
        Parent::nextFromRed(arc);
      } else {
        Parent::nextFromBlue(arc);
        arc.forward = static_cast<Edge&>(arc) == INVALID;
      }
    }

    void firstIn(Arc& arc, const Node& node) const {
      if (Parent::blue(node)) {
        Parent::firstFromBlue(arc, node);
        arc.forward = true;
      } else {
        Parent::firstFromRed(arc, node);
        arc.forward = static_cast<Edge&>(arc) == INVALID;
      }
    }
    void nextIn(Arc& arc) const {
      if (arc.forward) {
        Parent::nextFromBlue(arc);
      } else {
        Parent::nextFromRed(arc);
        arc.forward = static_cast<Edge&>(arc) == INVALID;
      }
    }

    Node source(const Arc& arc) const {
      return arc.forward ? Parent::red(arc) : Parent::blue(arc);
    }
    Node target(const Arc& arc) const {
      return arc.forward ? Parent::blue(arc) : Parent::red(arc);
    }

    int id(const Arc& arc) const {
      return (Parent::id(static_cast<const Edge&>(arc)) << 1) +
        (arc.forward ? 0 : 1);
    }
    Arc arcFromId(int ix) const {
      return Arc(Parent::fromEdgeId(ix >> 1), (ix & 1) == 0);
    }
    int maxArcId() const {
      return (Parent::maxEdgeId() << 1) + 1;
    }

    bool direction(const Arc& arc) const {
      return arc.forward;
    }

    Arc direct(const Edge& arc, bool dir) const {
      return Arc(arc, dir);
    }

    int arcNum() const {
      return 2 * Parent::edgeNum();
    }

    int edgeNum() const {
      return Parent::edgeNum();
    }


  };
}

#endif

lemon/bits/graph_extender.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_BITS_GRAPH_EXTENDER_H
 		#define LEMON_BITS_GRAPH_EXTENDER_H
 		#include <lemon/bits/invalid.h>
 		#include <lemon/bits/utility.h>
 		#include <lemon/core.h>
 		#include <lemon/bits/map_extender.h>
 		#include <lemon/bits/default_map.h>
 		#include <lemon/concept_check.h>
 		#include <lemon/concepts/maps.h>
 		///\ingroup graphbits
 		///\file
 		///\brief Extenders for the digraph types
 		namespace lemon {
 		  /// \ingroup graphbits
 		  ///
 		  /// \brief Extender for the Digraphs
 		  template <typename Base>
 		  class DigraphExtender : public Base {
 		  public:
 		    typedef Base Parent;
 		    typedef DigraphExtender Digraph;
 		    // Base extensions
 		    typedef typename Parent::Node Node;
 		    typedef typename Parent::Arc Arc;
 		    int maxId(Node) const {
 		      return Parent::maxNodeId();
+		    }
 		    int maxId(Arc) const {
 		      return Parent::maxArcId();
+		    }
 		    Node fromId(int id, Node) const {
 		      return Parent::nodeFromId(id);
+		    }
 		    Arc fromId(int id, Arc) const {
 		      return Parent::arcFromId(id);
+		    }
 		    Node oppositeNode(const Node &node, const Arc &arc) const {
 		      if (node == Parent::source(arc))
 		        return Parent::target(arc);
 		      else if(node == Parent::target(arc))
 		        return Parent::source(arc);
 		      else
 		        return INVALID;
+		    }
 		    // Alterable extension
 		    typedef AlterationNotifier<DigraphExtender, Node> NodeNotifier;
 		    typedef AlterationNotifier<DigraphExtender, Arc> ArcNotifier;
 		  protected:
 		    mutable NodeNotifier node_notifier;
 		    mutable ArcNotifier arc_notifier;
 		  public:
 		    NodeNotifier& notifier(Node) const {
 		      return node_notifier;
+		    }
 		    ArcNotifier& notifier(Arc) const {
 		      return arc_notifier;
+		    }
 		    class NodeIt : public Node {
 		      const Digraph* _digraph;
 		    public:
 		      NodeIt() {}
 		      NodeIt(Invalid i) : Node(i) { }
 		      explicit NodeIt(const Digraph& digraph) : _digraph(&digraph) {
 		        _digraph->first(static_cast<Node&>(*this));
+		      }
 		      NodeIt(const Digraph& digraph, const Node& node)
 		        : Node(node), _digraph(&digraph) {}
 		      NodeIt& operator++() {
 		        _digraph->next(*this);
 		        return *this;
+		      }
 		    };
 		    class ArcIt : public Arc {
 		      const Digraph* _digraph;
 		    public:
 		      ArcIt() { }
 		      ArcIt(Invalid i) : Arc(i) { }
 		      explicit ArcIt(const Digraph& digraph) : _digraph(&digraph) {
 		        _digraph->first(static_cast<Arc&>(*this));
+		      }
 		      ArcIt(const Digraph& digraph, const Arc& arc) :
 		        Arc(arc), _digraph(&digraph) { }
 		      ArcIt& operator++() {
 		        _digraph->next(*this);
 		        return *this;
+		      }
 		    };
 		    class OutArcIt : public Arc {
 		      const Digraph* _digraph;
 		    public:
 		      OutArcIt() { }
 		      OutArcIt(Invalid i) : Arc(i) { }
 		      OutArcIt(const Digraph& digraph, const Node& node)
 		        : _digraph(&digraph) {
 		        _digraph->firstOut(*this, node);
+		      }
 		      OutArcIt(const Digraph& digraph, const Arc& arc)
 		        : Arc(arc), _digraph(&digraph) {}
 		      OutArcIt& operator++() {
 		        _digraph->nextOut(*this);
 		        return *this;
+		      }
 		    };
 		    class InArcIt : public Arc {
 		      const Digraph* _digraph;
 		    public:
 		      InArcIt() { }
 		      InArcIt(Invalid i) : Arc(i) { }
 		      InArcIt(const Digraph& digraph, const Node& node)
 		        : _digraph(&digraph) {
 		        _digraph->firstIn(*this, node);
+		      }
 		      InArcIt(const Digraph& digraph, const Arc& arc) :
 		        Arc(arc), _digraph(&digraph) {}
 		      InArcIt& operator++() {
 		        _digraph->nextIn(*this);
 		        return *this;
+		      }
 		    };
 		    /// \brief Base node of the iterator
 		    ///
 		    /// Returns the base node (i.e. the source in this case) of the iterator
 		    Node baseNode(const OutArcIt &arc) const {
 		      return Parent::source(arc);
+		    }
 		    /// \brief Running node of the iterator
 		    ///
 		    /// Returns the running node (i.e. the target in this case) of the
 		    /// iterator
 		    Node runningNode(const OutArcIt &arc) const {
 		      return Parent::target(arc);
+		    }
 		    /// \brief Base node of the iterator
 		    ///
 		    /// Returns the base node (i.e. the target in this case) of the iterator
 		    Node baseNode(const InArcIt &arc) const {
 		      return Parent::target(arc);
+		    }
 		    /// \brief Running node of the iterator
 		    ///
 		    /// Returns the running node (i.e. the source in this case) of the
 		    /// iterator
 		    Node runningNode(const InArcIt &arc) const {
 		      return Parent::source(arc);
+		    }
 		    template <typename _Value>
 		    class NodeMap
 		      : public MapExtender<DefaultMap<Digraph, Node, _Value> > {
 		    public:
 		      typedef DigraphExtender Digraph;
 		      typedef MapExtender<DefaultMap<Digraph, Node, _Value> > Parent;
 		      explicit NodeMap(const Digraph& digraph)
 		        : Parent(digraph) {}
 		      NodeMap(const Digraph& digraph, const _Value& value)
 		        : Parent(digraph, value) {}
 		      NodeMap& operator=(const NodeMap& cmap) {
 		        return operator=<NodeMap>(cmap);
+		      }
 		      template <typename CMap>
 		      NodeMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 		        return *this;
+		      }
 		    };
 		    template <typename _Value>
 		    class ArcMap
 		      : public MapExtender<DefaultMap<Digraph, Arc, _Value> > {
 		    public:
 		      typedef DigraphExtender Digraph;
 		      typedef MapExtender<DefaultMap<Digraph, Arc, _Value> > Parent;
 		      explicit ArcMap(const Digraph& digraph)
 		        : Parent(digraph) {}
 		      ArcMap(const Digraph& digraph, const _Value& value)
 		        : Parent(digraph, value) {}
 		      ArcMap& operator=(const ArcMap& cmap) {
 		        return operator=<ArcMap>(cmap);
+		      }
 		      template <typename CMap>
 		      ArcMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 		        return *this;
+		      }
 		    };
 		    Node addNode() {
 		      Node node = Parent::addNode();
 		      notifier(Node()).add(node);
 		      return node;
+		    }
 		    Arc addArc(const Node& from, const Node& to) {
 		      Arc arc = Parent::addArc(from, to);
 		      notifier(Arc()).add(arc);
 		      return arc;
+		    }
 		    void clear() {
 		      notifier(Arc()).clear();
 		      notifier(Node()).clear();
 		      Parent::clear();
+		    }
 		    template <typename Digraph, typename NodeRefMap, typename ArcRefMap>
 		    void build(const Digraph& digraph, NodeRefMap& nodeRef, ArcRefMap& arcRef) {
 		      Parent::build(digraph, nodeRef, arcRef);
 		      notifier(Node()).build();
 		      notifier(Arc()).build();
+		    }
 		    void erase(const Node& node) {
 		      Arc arc;
 		      Parent::firstOut(arc, node);
 		      while (arc != INVALID ) {
 		        erase(arc);
 		        Parent::firstOut(arc, node);
+		      }
 		      Parent::firstIn(arc, node);
 		      while (arc != INVALID ) {
 		        erase(arc);
 		        Parent::firstIn(arc, node);
+		      }
 		      notifier(Node()).erase(node);
 		      Parent::erase(node);
+		    }
 		    void erase(const Arc& arc) {
 		      notifier(Arc()).erase(arc);
 		      Parent::erase(arc);
+		    }
 		    DigraphExtender() {
 		      node_notifier.setContainer(*this);
 		      arc_notifier.setContainer(*this);
+		    }
 		    ~DigraphExtender() {
 		      arc_notifier.clear();
 		      node_notifier.clear();
+		    }
 		  };
 		  /// \ingroup _graphbits
 		  ///
 		  /// \brief Extender for the Graphs
 		  template <typename Base>
 		  class GraphExtender : public Base {
 		  public:
 		    typedef Base Parent;
 		    typedef GraphExtender Graph;
 		    typedef True UndirectedTag;
 		    typedef typename Parent::Node Node;
 		    typedef typename Parent::Arc Arc;
 		    typedef typename Parent::Edge Edge;
 		    // Graph extension
 		    int maxId(Node) const {
 		      return Parent::maxNodeId();
+		    }
 		    int maxId(Arc) const {
 		      return Parent::maxArcId();
+		    }
 		    int maxId(Edge) const {
 		      return Parent::maxEdgeId();
+		    }
 		    Node fromId(int id, Node) const {
 		      return Parent::nodeFromId(id);
+		    }
 		    Arc fromId(int id, Arc) const {
 		      return Parent::arcFromId(id);
+		    }
 		    Edge fromId(int id, Edge) const {
 		      return Parent::edgeFromId(id);
+		    }
 		    Node oppositeNode(const Node &n, const Edge &e) const {
 		      if( n == Parent::u(e))
 		        return Parent::v(e);
 		      else if( n == Parent::v(e))
 		        return Parent::u(e);
 		      else
 		        return INVALID;
+		    }
 		    Arc oppositeArc(const Arc &arc) const {
 		      return Parent::direct(arc, !Parent::direction(arc));
+		    }
 		    using Parent::direct;
 		    Arc direct(const Edge &edge, const Node &node) const {
 		      return Parent::direct(edge, Parent::u(edge) == node);
+		    }
 		    // Alterable extension
 		    typedef AlterationNotifier<GraphExtender, Node> NodeNotifier;
 		    typedef AlterationNotifier<GraphExtender, Arc> ArcNotifier;
 		    typedef AlterationNotifier<GraphExtender, Edge> EdgeNotifier;
 		  protected:
 		    mutable NodeNotifier node_notifier;
 		    mutable ArcNotifier arc_notifier;
 		    mutable EdgeNotifier edge_notifier;
 		  public:
 		    NodeNotifier& notifier(Node) const {
 		      return node_notifier;
+		    }
 		    ArcNotifier& notifier(Arc) const {
 		      return arc_notifier;
+		    }
 		    EdgeNotifier& notifier(Edge) const {
 		      return edge_notifier;
+		    }
 		    class NodeIt : public Node {
 		      const Graph* _graph;
 		    public:
 		      NodeIt() {}
 		      NodeIt(Invalid i) : Node(i) { }
 		      explicit NodeIt(const Graph& graph) : _graph(&graph) {
 		        _graph->first(static_cast<Node&>(*this));
+		      }
 		      NodeIt(const Graph& graph, const Node& node)
 		        : Node(node), _graph(&graph) {}
 		      NodeIt& operator++() {
 		        _graph->next(*this);
 		        return *this;
+		      }
 		    };
 		    class ArcIt : public Arc {
 		      const Graph* _graph;
 		    public:
 		      ArcIt() { }
 		      ArcIt(Invalid i) : Arc(i) { }
 		      explicit ArcIt(const Graph& graph) : _graph(&graph) {
 		        _graph->first(static_cast<Arc&>(*this));
+		      }
 		      ArcIt(const Graph& graph, const Arc& arc) :
 		        Arc(arc), _graph(&graph) { }
 		      ArcIt& operator++() {
 		        _graph->next(*this);
 		        return *this;
+		      }
 		    };
 		    class OutArcIt : public Arc {
 		      const Graph* _graph;
 		    public:
 		      OutArcIt() { }
 		      OutArcIt(Invalid i) : Arc(i) { }
 		      OutArcIt(const Graph& graph, const Node& node)
 		        : _graph(&graph) {
 		        _graph->firstOut(*this, node);
+		      }
 		      OutArcIt(const Graph& graph, const Arc& arc)
 		        : Arc(arc), _graph(&graph) {}
 		      OutArcIt& operator++() {
 		        _graph->nextOut(*this);
 		        return *this;
+		      }
 		    };
 		    class InArcIt : public Arc {
 		      const Graph* _graph;
 		    public:
 		      InArcIt() { }
 		      InArcIt(Invalid i) : Arc(i) { }
 		      InArcIt(const Graph& graph, const Node& node)
 		        : _graph(&graph) {
 		        _graph->firstIn(*this, node);
+		      }
 		      InArcIt(const Graph& graph, const Arc& arc) :
 		        Arc(arc), _graph(&graph) {}
 		      InArcIt& operator++() {
 		        _graph->nextIn(*this);
 		        return *this;
+		      }
 		    };
 		    class EdgeIt : public Parent::Edge {
 		      const Graph* _graph;
 		    public:
 		      EdgeIt() { }
 		      EdgeIt(Invalid i) : Edge(i) { }
 		      explicit EdgeIt(const Graph& graph) : _graph(&graph) {
 		        _graph->first(static_cast<Edge&>(*this));
+		      }
 		      EdgeIt(const Graph& graph, const Edge& edge) :
 		        Edge(edge), _graph(&graph) { }
 		      EdgeIt& operator++() {
 		        _graph->next(*this);
 		        return *this;
+		      }
 		    };
 		    class IncEdgeIt : public Parent::Edge {
 		      friend class GraphExtender;
 		      const Graph* _graph;
 		      bool _direction;
 		    public:
 		      IncEdgeIt() { }
 		      IncEdgeIt(Invalid i) : Edge(i), _direction(false) { }
 		      IncEdgeIt(const Graph& graph, const Node &node) : _graph(&graph) {
 		        _graph->firstInc(*this, _direction, node);
+		      }
 		      IncEdgeIt(const Graph& graph, const Edge &edge, const Node &node)
 		        : _graph(&graph), Edge(edge) {
 		        _direction = (_graph->source(edge) == node);
+		      }
 		      IncEdgeIt& operator++() {
 		        _graph->nextInc(*this, _direction);
 		        return *this;
+		      }
 		    };
 		    /// \brief Base node of the iterator
 		    ///
 		    /// Returns the base node (ie. the source in this case) of the iterator
 		    Node baseNode(const OutArcIt &arc) const {
 		      return Parent::source(static_cast<const Arc&>(arc));
+		    }
 		    /// \brief Running node of the iterator
 		    ///
 		    /// Returns the running node (ie. the target in this case) of the
 		    /// iterator
 		    Node runningNode(const OutArcIt &arc) const {
 		      return Parent::target(static_cast<const Arc&>(arc));
+		    }
 		    /// \brief Base node of the iterator
 		    ///
 		    /// Returns the base node (ie. the target in this case) of the iterator
 		    Node baseNode(const InArcIt &arc) const {
 		      return Parent::target(static_cast<const Arc&>(arc));
+		    }
 		    /// \brief Running node of the iterator
 		    ///
 		    /// Returns the running node (ie. the source in this case) of the
 		    /// iterator
 		    Node runningNode(const InArcIt &arc) const {
 		      return Parent::source(static_cast<const Arc&>(arc));
+		    }
 		    /// Base node of the iterator
 		    ///
 		    /// Returns the base node of the iterator
 		    Node baseNode(const IncEdgeIt &edge) const {
 		      return edge._direction ? u(edge) : v(edge);
+		    }
 		    /// Running node of the iterator
 		    ///
 		    /// Returns the running node of the iterator
 		    Node runningNode(const IncEdgeIt &edge) const {
 		      return edge._direction ? v(edge) : u(edge);
+		    }
 		    // Mappable extension
 		    template <typename _Value>
 		    class NodeMap
 		      : public MapExtender<DefaultMap<Graph, Node, _Value> > {
 		    public:
 		      typedef GraphExtender Graph;
 		      typedef MapExtender<DefaultMap<Graph, Node, _Value> > Parent;
 		      NodeMap(const Graph& graph)
 		        : Parent(graph) {}
 		      NodeMap(const Graph& graph, const _Value& value)
 		        : Parent(graph, value) {}
 		      NodeMap& operator=(const NodeMap& cmap) {
 		        return operator=<NodeMap>(cmap);
+		      }
 		      template <typename CMap>
 		      NodeMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 		        return *this;
+		      }
 		    };
 		    template <typename _Value>
 		    class ArcMap
 		      : public MapExtender<DefaultMap<Graph, Arc, _Value> > {
 		    public:
 		      typedef GraphExtender Graph;
 		      typedef MapExtender<DefaultMap<Graph, Arc, _Value> > Parent;
 		      ArcMap(const Graph& graph)
 		        : Parent(graph) {}
 		      ArcMap(const Graph& graph, const _Value& value)
 		        : Parent(graph, value) {}
 		      ArcMap& operator=(const ArcMap& cmap) {
 		        return operator=<ArcMap>(cmap);
+		      }
 		      template <typename CMap>
 		      ArcMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 		        return *this;
+		      }
 		    };
 		    template <typename _Value>
 		    class EdgeMap
 		      : public MapExtender<DefaultMap<Graph, Edge, _Value> > {
 		    public:
 		      typedef GraphExtender Graph;
 		      typedef MapExtender<DefaultMap<Graph, Edge, _Value> > Parent;
 		      EdgeMap(const Graph& graph)
 		        : Parent(graph) {}
 		      EdgeMap(const Graph& graph, const _Value& value)
 		        : Parent(graph, value) {}
 		      EdgeMap& operator=(const EdgeMap& cmap) {
 		        return operator=<EdgeMap>(cmap);
+		      }
 		      template <typename CMap>
 		      EdgeMap& operator=(const CMap& cmap) {
 		        Parent::operator=(cmap);
 		        return *this;
+		      }
 		    };
 		    // Alteration extension
 		    Node addNode() {
 		      Node node = Parent::addNode();
 		      notifier(Node()).add(node);
 		      return node;
+		    }
 		    Edge addEdge(const Node& from, const Node& to) {
 		      Edge edge = Parent::addEdge(from, to);
 		      notifier(Edge()).add(edge);
 		      std::vector<Arc> ev;
 		      ev.push_back(Parent::direct(edge, true));
 		      ev.push_back(Parent::direct(edge, false));
 		      notifier(Arc()).add(ev);
 		      return edge;
+		    }
 		    void clear() {
 		      notifier(Arc()).clear();
 		      notifier(Edge()).clear();
 		      notifier(Node()).clear();
 		      Parent::clear();
+		    }
 		    template <typename Graph, typename NodeRefMap, typename EdgeRefMap>
 		    void build(const Graph& graph, NodeRefMap& nodeRef,
 		               EdgeRefMap& edgeRef) {
 		      Parent::build(graph, nodeRef, edgeRef);
 		      notifier(Node()).build();
 		      notifier(Edge()).build();
 		      notifier(Arc()).build();
+		    }
 		    void erase(const Node& node) {
 		      Arc arc;
 		      Parent::firstOut(arc, node);
 		      while (arc != INVALID ) {
 		        erase(arc);
 		        Parent::firstOut(arc, node);
+		      }
 		      Parent::firstIn(arc, node);
 		      while (arc != INVALID ) {
 		        erase(arc);
 		        Parent::firstIn(arc, node);
+		      }
 		      notifier(Node()).erase(node);
 		      Parent::erase(node);
+		    }
 		    void erase(const Edge& edge) {
 		      std::vector<Arc> av;
 		      av.push_back(Parent::direct(edge, true));
 		      av.push_back(Parent::direct(edge, false));
 		      notifier(Arc()).erase(av);
 		      notifier(Edge()).erase(edge);
 		      Parent::erase(edge);
+		    }
 		    GraphExtender() {
 		      node_notifier.setContainer(*this);
 		      arc_notifier.setContainer(*this);
 		      edge_notifier.setContainer(*this);
+		    }
 		    ~GraphExtender() {
 		      edge_notifier.clear();
 		      arc_notifier.clear();
 		      node_notifier.clear();
+		    }
 		  };
+		}
 		#endif

lemon/bits/traits.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_BITS_TRAITS_H
 		#define LEMON_BITS_TRAITS_H
 		#include <lemon/bits/utility.h>
 		///\file
 		///\brief Traits for graphs and maps
 		///
 		#include <lemon/bits/enable_if.h>
 		namespace lemon {
 		  struct InvalidType {};
 		  template <typename _Graph, typename _Item>
 		  class ItemSetTraits {};
 		  template <typename Graph, typename Enable = void>
 		  struct NodeNotifierIndicator {
 		    typedef InvalidType Type;
 		  };
 		  template <typename Graph>
 		  struct NodeNotifierIndicator<
 		    Graph,
 		    typename enable_if<typename Graph::NodeNotifier::Notifier, void>::type
 		  > {
 		    typedef typename Graph::NodeNotifier Type;
 		  };
 		  template <typename _Graph>
 		  class ItemSetTraits<_Graph, typename _Graph::Node> {
 		  public:
 		    typedef _Graph Graph;
 		    typedef typename Graph::Node Item;
 		    typedef typename Graph::NodeIt ItemIt;
 		    typedef typename NodeNotifierIndicator<Graph>::Type ItemNotifier;
 		    template <typename _Value>
 		    class Map : public Graph::template NodeMap<_Value> {
 		    public:
 		      typedef typename Graph::template NodeMap<_Value> Parent;
 		      typedef typename Graph::template NodeMap<_Value> Type;
 		      typedef typename Parent::Value Value;
 		      Map(const Graph& _digraph) : Parent(_digraph) {}
 		      Map(const Graph& _digraph, const Value& _value)
 		        : Parent(_digraph, _value) {}
 		     };
 		  };
 		  template <typename Graph, typename Enable = void>
 		  struct ArcNotifierIndicator {
 		    typedef InvalidType Type;
 		  };
 		  template <typename Graph>
 		  struct ArcNotifierIndicator<
 		    Graph,
 		    typename enable_if<typename Graph::ArcNotifier::Notifier, void>::type
 		  > {
 		    typedef typename Graph::ArcNotifier Type;
 		  };
 		  template <typename _Graph>
 		  class ItemSetTraits<_Graph, typename _Graph::Arc> {
 		  public:
 		    typedef _Graph Graph;
 		    typedef typename Graph::Arc Item;
 		    typedef typename Graph::ArcIt ItemIt;
 		    typedef typename ArcNotifierIndicator<Graph>::Type ItemNotifier;
 		    template <typename _Value>
 		    class Map : public Graph::template ArcMap<_Value> {
 		    public:
 		      typedef typename Graph::template ArcMap<_Value> Parent;
 		      typedef typename Graph::template ArcMap<_Value> Type;
 		      typedef typename Parent::Value Value;
 		      Map(const Graph& _digraph) : Parent(_digraph) {}
 		      Map(const Graph& _digraph, const Value& _value)
 		        : Parent(_digraph, _value) {}
 		    };
 		  };
 		  template <typename Graph, typename Enable = void>
 		  struct EdgeNotifierIndicator {
 		    typedef InvalidType Type;
 		  };
 		  template <typename Graph>
 		  struct EdgeNotifierIndicator<
 		    Graph,
 		    typename enable_if<typename Graph::EdgeNotifier::Notifier, void>::type
 		  > {
 		    typedef typename Graph::EdgeNotifier Type;
 		  };
 		  template <typename _Graph>
 		  class ItemSetTraits<_Graph, typename _Graph::Edge> {
 		  public:
 		    typedef _Graph Graph;
 		    typedef typename Graph::Edge Item;
 		    typedef typename Graph::EdgeIt ItemIt;
 		    typedef typename EdgeNotifierIndicator<Graph>::Type ItemNotifier;
 		    template <typename _Value>
 		    class Map : public Graph::template EdgeMap<_Value> {
 		    public:
 		      typedef typename Graph::template EdgeMap<_Value> Parent;
 		      typedef typename Graph::template EdgeMap<_Value> Type;
 		      typedef typename Parent::Value Value;
 		      Map(const Graph& _digraph) : Parent(_digraph) {}
 		      Map(const Graph& _digraph, const Value& _value)
 		        : Parent(_digraph, _value) {}
 		    };
 		  };
 		  template <typename Map, typename Enable = void>
 		  struct MapTraits {
 		    typedef False ReferenceMapTag;
 		    typedef typename Map::Key Key;
 		    typedef typename Map::Value Value;
 		    typedef Value ConstReturnValue;
 		    typedef Value ReturnValue;
 		  };
 		  template <typename Map>
 		  struct MapTraits<
 		    Map, typename enable_if<typename Map::ReferenceMapTag, void>::type >
+		  {
 		    typedef True ReferenceMapTag;
 		    typedef typename Map::Key Key;
 		    typedef typename Map::Value Value;
 		    typedef typename Map::ConstReference ConstReturnValue;
 		    typedef typename Map::Reference ReturnValue;
 		    typedef typename Map::ConstReference ConstReference;
 		    typedef typename Map::Reference Reference;
 		 };
 		  template <typename MatrixMap, typename Enable = void>
 		  struct MatrixMapTraits {
 		    typedef False ReferenceMapTag;
 		    typedef typename MatrixMap::FirstKey FirstKey;
 		    typedef typename MatrixMap::SecondKey SecondKey;
 		    typedef typename MatrixMap::Value Value;
 		    typedef Value ConstReturnValue;
 		    typedef Value ReturnValue;
 		  };
 		  template <typename MatrixMap>
 		  struct MatrixMapTraits<
 		    MatrixMap, typename enable_if<typename MatrixMap::ReferenceMapTag,
 		                                  void>::type >
+		  {
 		    typedef True ReferenceMapTag;
 		    typedef typename MatrixMap::FirstKey FirstKey;
 		    typedef typename MatrixMap::SecondKey SecondKey;
 		    typedef typename MatrixMap::Value Value;
 		    typedef typename MatrixMap::ConstReference ConstReturnValue;
 		    typedef typename MatrixMap::Reference ReturnValue;
 		    typedef typename MatrixMap::ConstReference ConstReference;
 		    typedef typename MatrixMap::Reference Reference;
 		 };
 		  // Indicators for the tags
 		  template <typename Graph, typename Enable = void>
 		  struct NodeNumTagIndicator {
 		    static const bool value = false;
 		  };
 		  template <typename Graph>
 		  struct NodeNumTagIndicator<
 		    Graph,
 		    typename enable_if<typename Graph::NodeNumTag, void>::type
 		  > {
 		    static const bool value = true;
 		  };
 		  template <typename Graph, typename Enable = void>
 		  struct EdgeNumTagIndicator {
 		    static const bool value = false;
 		  };
 		  template <typename Graph>
 		  struct EdgeNumTagIndicator<
 		    Graph,
 		    typename enable_if<typename Graph::EdgeNumTag, void>::type
 		  > {
 		    static const bool value = true;
 		  };
 		  template <typename Graph, typename Enable = void>
 		  struct FindEdgeTagIndicator {
 		    static const bool value = false;
 		  };
 		  template <typename Graph>
 		  struct FindEdgeTagIndicator<
 		    Graph,
 		    typename enable_if<typename Graph::FindEdgeTag, void>::type
 		  > {
 		    static const bool value = true;
 		  };
 		  template <typename Graph, typename Enable = void>
 		  struct UndirectedTagIndicator {
 		    static const bool value = false;
 		  };
 		  template <typename Graph>
 		  struct UndirectedTagIndicator<
 		    Graph,
 		    typename enable_if<typename Graph::UndirectedTag, void>::type
 		  > {
 		    static const bool value = true;
 		  };
 		  template <typename Graph, typename Enable = void>
 		  struct BuildTagIndicator {
 		    static const bool value = false;
 		  };
 		  template <typename Graph>
 		  struct BuildTagIndicator<
 		    Graph,
 		    typename enable_if<typename Graph::BuildTag, void>::type
 		  > {
 		    static const bool value = true;
 		  };
+		}
 		#endif

lemon/bits/vector_map.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_BITS_VECTOR_MAP_H
 		#define LEMON_BITS_VECTOR_MAP_H
 		#include <vector>
 		#include <algorithm>
 		#include <lemon/bits/traits.h>
 		#include <lemon/bits/utility.h>
+		#include <lemon/core.h>
 		#include <lemon/bits/alteration_notifier.h>
 		#include <lemon/concept_check.h>
 		#include <lemon/concepts/maps.h>
 		///\ingroup graphbits
 		///
 		///\file
 		///\brief Vector based graph maps.
 		namespace lemon {
 		  /// \ingroup graphbits
 		  ///
 		  /// \brief Graph map based on the std::vector storage.
 		  ///
 		  /// The VectorMap template class is graph map structure what
 		  /// automatically updates the map when a key is added to or erased from
 		  /// the map. This map type uses the std::vector to store the values.
 		  ///
 		  /// \tparam _Notifier The AlterationNotifier that will notify this map.
 		  /// \tparam _Item The item type of the graph items.
 		  /// \tparam _Value The value type of the map.
 		  /// \todo Fix the doc: there is _Graph parameter instead of _Notifier.
 		  template <typename _Graph, typename _Item, typename _Value>
 		  class VectorMap
 		    : public ItemSetTraits<_Graph, _Item>::ItemNotifier::ObserverBase {
 		  private:
 		    /// The container type of the map.
 		    typedef std::vector<_Value> Container;
 		  public:
 		    /// The graph type of the map.
 		    typedef _Graph Graph;
 		    /// The item type of the map.
 		    typedef _Item Item;
 		    /// The reference map tag.
 		    typedef True ReferenceMapTag;
 		    /// The key type of the map.
 		    typedef _Item Key;
 		    /// The value type of the map.
 		    typedef _Value Value;
 		    /// The notifier type.
 		    typedef typename ItemSetTraits<_Graph, _Item>::ItemNotifier Notifier;
 		    /// The map type.
 		    typedef VectorMap Map;
 		    /// The base class of the map.
 		    typedef typename Notifier::ObserverBase Parent;
 		    /// The reference type of the map;
 		    typedef typename Container::reference Reference;
 		    /// The const reference type of the map;
 		    typedef typename Container::const_reference ConstReference;
 		    /// \brief Constructor to attach the new map into the notifier.
 		    ///
 		    /// It constructs a map and attachs it into the notifier.
 		    /// It adds all the items of the graph to the map.
 		    VectorMap(const Graph& graph) {
 		      Parent::attach(graph.notifier(Item()));
 		      container.resize(Parent::notifier()->maxId() + 1);
+		    }
 		    /// \brief Constructor uses given value to initialize the map.
 		    ///
 		    /// It constructs a map uses a given value to initialize the map.
 		    /// It adds all the items of the graph to the map.
 		    VectorMap(const Graph& graph, const Value& value) {
 		      Parent::attach(graph.notifier(Item()));
 		      container.resize(Parent::notifier()->maxId() + 1, value);
+		    }
 		    /// \brief Copy constructor
 		    ///
 		    /// Copy constructor.
 		    VectorMap(const VectorMap& _copy) : Parent() {
 		      if (_copy.attached()) {
 		        Parent::attach(*_copy.notifier());
 		        container = _copy.container;
+		      }
+		    }
 		    /// \brief Assign operator.
 		    ///
 		    /// This operator assigns for each item in the map the
 		    /// value mapped to the same item in the copied map.
 		    /// The parameter map should be indiced with the same
 		    /// itemset because this assign operator does not change
 		    /// the container of the map.
 		    VectorMap& operator=(const VectorMap& cmap) {
 		      return operator=<VectorMap>(cmap);
+		    }
 		    /// \brief Template assign operator.
 		    ///
 		    /// The given parameter should be conform to the ReadMap
 		    /// concecpt and could be indiced by the current item set of
 		    /// the NodeMap. In this case the value for each item
 		    /// is assigned by the value of the given ReadMap.
 		    template <typename CMap>
 		    VectorMap& operator=(const CMap& cmap) {
 		      checkConcept<concepts::ReadMap<Key, _Value>, CMap>();
 		      const typename Parent::Notifier* nf = Parent::notifier();
 		      Item it;
 		      for (nf->first(it); it != INVALID; nf->next(it)) {
 		        set(it, cmap[it]);
+		      }
 		      return *this;
+		    }
 		  public:
 		    /// \brief The subcript operator.
 		    ///
 		    /// The subscript operator. The map can be subscripted by the
 		    /// actual items of the graph.
 		    Reference operator[](const Key& key) {
 		      return container[Parent::notifier()->id(key)];
+		    }
 		    /// \brief The const subcript operator.
 		    ///
 		    /// The const subscript operator. The map can be subscripted by the
 		    /// actual items of the graph.
 		    ConstReference operator[](const Key& key) const {
 		      return container[Parent::notifier()->id(key)];
+		    }
 		    /// \brief The setter function of the map.
 		    ///
 		    /// It the same as operator[](key) = value expression.
 		    void set(const Key& key, const Value& value) {
 		      (*this)[key] = value;
+		    }
 		  protected:
 		    /// \brief Adds a new key to the map.
 		    ///
 		    /// It adds a new key to the map. It called by the observer notifier
 		    /// and it overrides the add() member function of the observer base.
 		    virtual void add(const Key& key) {
 		      int id = Parent::notifier()->id(key);
 		      if (id >= int(container.size())) {
 		        container.resize(id + 1);
+		      }
+		    }
 		    /// \brief Adds more new keys to the map.
 		    ///
 		    /// It adds more new keys to the map. It called by the observer notifier
 		    /// and it overrides the add() member function of the observer base.
 		    virtual void add(const std::vector<Key>& keys) {
 		      int max = container.size() - 1;
 		      for (int i = 0; i < int(keys.size()); ++i) {
 		        int id = Parent::notifier()->id(keys[i]);
 		        if (id >= max) {
 		          max = id;
+		        }
+		      }
 		      container.resize(max + 1);
+		    }
 		    /// \brief Erase a key from the map.
 		    ///
 		    /// Erase a key from the map. It called by the observer notifier
 		    /// and it overrides the erase() member function of the observer base.
 		    virtual void erase(const Key& key) {
 		      container[Parent::notifier()->id(key)] = Value();
+		    }
 		    /// \brief Erase more keys from the map.
 		    ///
 		    /// Erase more keys from the map. It called by the observer notifier
 		    /// and it overrides the erase() member function of the observer base.
 		    virtual void erase(const std::vector<Key>& keys) {
 		      for (int i = 0; i < int(keys.size()); ++i) {
 		        container[Parent::notifier()->id(keys[i])] = Value();
+		      }
+		    }
 		    /// \brief Buildes the map.
 		    ///
 		    /// It buildes the map. It called by the observer notifier
 		    /// and it overrides the build() member function of the observer base.
 		    virtual void build() {
 		      int size = Parent::notifier()->maxId() + 1;
 		      container.reserve(size);
 		      container.resize(size);
+		    }
 		    /// \brief Clear the map.
 		    ///
 		    /// It erase all items from the map. It called by the observer notifier
 		    /// and it overrides the clear() member function of the observer base.
 		    virtual void clear() {
 		      container.clear();
+		    }
 		  private:
 		    Container container;
 		  };
+		}
 		#endif

lemon/concepts/digraph.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_CONCEPT_DIGRAPH_H
 		#define LEMON_CONCEPT_DIGRAPH_H
 		///\ingroup graph_concepts
 		///\file
 		///\brief The concept of directed graphs.
 		#include <lemon/bits/invalid.h>
 		#include <lemon/bits/utility.h>
 		#include <lemon/core.h>
 		#include <lemon/concepts/maps.h>
 		#include <lemon/concept_check.h>
 		#include <lemon/concepts/graph_components.h>
 		namespace lemon {
 		  namespace concepts {
 		    /// \ingroup graph_concepts
 		    ///
 		    /// \brief Class describing the concept of directed graphs.
 		    ///
 		    /// This class describes the \ref concept "concept" of the
 		    /// immutable directed digraphs.
 		    ///
 		    /// Note that actual digraph implementation like @ref ListDigraph or
 		    /// @ref SmartDigraph may have several additional functionality.
 		    ///
 		    /// \sa concept
 		    class Digraph {
 		    private:
 		      ///Digraphs are \e not copy constructible. Use DigraphCopy() instead.
 		      ///Digraphs are \e not copy constructible. Use DigraphCopy() instead.
 		      ///
 		      Digraph(const Digraph &) {};
 		      ///\brief Assignment of \ref Digraph "Digraph"s to another ones are
 		      ///\e not allowed. Use DigraphCopy() instead.
 		      ///Assignment of \ref Digraph "Digraph"s to another ones are
 		      ///\e not allowed.  Use DigraphCopy() instead.
 		      void operator=(const Digraph &) {}
 		    public:
 		      ///\e
 		      /// Defalult constructor.
 		      /// Defalult constructor.
 		      ///
 		      Digraph() { }
 		      /// Class for identifying a node of the digraph
 		      /// This class identifies a node of the digraph. It also serves
 		      /// as a base class of the node iterators,
 		      /// thus they will convert to this type.
 		      class Node {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        Node() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        Node(const Node&) { }
 		        /// Invalid constructor \& conversion.
 		        /// This constructor initializes the iterator to be invalid.
 		        /// \sa Invalid for more details.
 		        Node(Invalid) { }
 		        /// Equality operator
 		        /// Two iterators are equal if and only if they point to the
 		        /// same object or both are invalid.
 		        bool operator==(Node) const { return true; }
 		        /// Inequality operator
 		        /// \sa operator==(Node n)
 		        ///
 		        bool operator!=(Node) const { return true; }
 		        /// Artificial ordering operator.
 		        /// To allow the use of digraph descriptors as key type in std::map or
 		        /// similar associative container we require this.
 		        ///
 		        /// \note This operator only have to define some strict ordering of
 		        /// the items; this order has nothing to do with the iteration
 		        /// ordering of the items.
 		        bool operator<(Node) const { return false; }
 		      };
 		      /// This iterator goes through each node.
 		      /// This iterator goes through each node.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of nodes in digraph \c g of type \c Digraph like this:
 		      ///\code
 		      /// int count=0;
 		      /// for (Digraph::NodeIt n(g); n!=INVALID; ++n) ++count;
 		      ///\endcode
 		      class NodeIt : public Node {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        NodeIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        NodeIt(const NodeIt& n) : Node(n) { }
 		        /// Invalid constructor \& conversion.
 		        /// Initialize the iterator to be invalid.
 		        /// \sa Invalid for more details.
 		        NodeIt(Invalid) { }
 		        /// Sets the iterator to the first node.
 		        /// Sets the iterator to the first node of \c g.
 		        ///
 		        NodeIt(const Digraph&) { }
 		        /// Node -> NodeIt conversion.
 		        /// Sets the iterator to the node of \c the digraph pointed by
 		        /// the trivial iterator.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        NodeIt(const Digraph&, const Node&) { }
 		        /// Next node.
 		        /// Assign the iterator to the next node.
 		        ///
 		        NodeIt& operator++() { return *this; }
 		      };
 		      /// Class for identifying an arc of the digraph
 		      /// This class identifies an arc of the digraph. It also serves
 		      /// as a base class of the arc iterators,
 		      /// thus they will convert to this type.
 		      class Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        Arc() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        Arc(const Arc&) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        Arc(Invalid) { }
 		        /// Equality operator
 		        /// Two iterators are equal if and only if they point to the
 		        /// same object or both are invalid.
 		        bool operator==(Arc) const { return true; }
 		        /// Inequality operator
 		        /// \sa operator==(Arc n)
 		        ///
 		        bool operator!=(Arc) const { return true; }
 		        /// Artificial ordering operator.
 		        /// To allow the use of digraph descriptors as key type in std::map or
 		        /// similar associative container we require this.
 		        ///
 		        /// \note This operator only have to define some strict ordering of
 		        /// the items; this order has nothing to do with the iteration
 		        /// ordering of the items.
 		        bool operator<(Arc) const { return false; }
 		      };
 		      /// This iterator goes trough the outgoing arcs of a node.
 		      /// This iterator goes trough the \e outgoing arcs of a certain node
 		      /// of a digraph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of outgoing arcs of a node \c n
 		      /// in digraph \c g of type \c Digraph as follows.
 		      ///\code
 		      /// int count=0;
 		      /// for (Digraph::OutArcIt e(g, n); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class OutArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        OutArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        OutArcIt(const OutArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        OutArcIt(Invalid) { }
 		        /// This constructor sets the iterator to the first outgoing arc.
 		        /// This constructor sets the iterator to the first outgoing arc of
 		        /// the node.
 		        OutArcIt(const Digraph&, const Node&) { }
 		        /// Arc -> OutArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        OutArcIt(const Digraph&, const Arc&) { }
 		        ///Next outgoing arc
 		        /// Assign the iterator to the next
 		        /// outgoing arc of the corresponding node.
 		        OutArcIt& operator++() { return *this; }
 		      };
 		      /// This iterator goes trough the incoming arcs of a node.
 		      /// This iterator goes trough the \e incoming arcs of a certain node
 		      /// of a digraph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of outgoing arcs of a node \c n
 		      /// in digraph \c g of type \c Digraph as follows.
 		      ///\code
 		      /// int count=0;
 		      /// for(Digraph::InArcIt e(g, n); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class InArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        InArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        InArcIt(const InArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        InArcIt(Invalid) { }
 		        /// This constructor sets the iterator to first incoming arc.
 		        /// This constructor set the iterator to the first incoming arc of
 		        /// the node.
 		        InArcIt(const Digraph&, const Node&) { }
 		        /// Arc -> InArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator \c e.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        InArcIt(const Digraph&, const Arc&) { }
 		        /// Next incoming arc
 		        /// Assign the iterator to the next inarc of the corresponding node.
 		        ///
 		        InArcIt& operator++() { return *this; }
 		      };
 		      /// This iterator goes through each arc.
 		      /// This iterator goes through each arc of a digraph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of arcs in a digraph \c g of type \c Digraph as follows:
 		      ///\code
 		      /// int count=0;
 		      /// for(Digraph::ArcIt e(g); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class ArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        ArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        ArcIt(const ArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        ArcIt(Invalid) { }
 		        /// This constructor sets the iterator to the first arc.
 		        /// This constructor sets the iterator to the first arc of \c g.
 		        ///@param g the digraph
 		        ArcIt(const Digraph& g) { ignore_unused_variable_warning(g); }
 		        /// Arc -> ArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator \c e.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        ArcIt(const Digraph&, const Arc&) { }
 		        ///Next arc
 		        /// Assign the iterator to the next arc.
 		        ArcIt& operator++() { return *this; }
 		      };
 		      ///Gives back the target node of an arc.
 		      ///Gives back the target node of an arc.
 		      ///
 		      Node target(Arc) const { return INVALID; }
 		      ///Gives back the source node of an arc.
 		      ///Gives back the source node of an arc.
 		      ///
 		      Node source(Arc) const { return INVALID; }
 		      /// \brief Returns the ID of the node.
 		      int id(Node) const { return -1; }
 		      /// \brief Returns the ID of the arc.
 		      int id(Arc) const { return -1; }
 		      /// \brief Returns the node with the given ID.
 		      ///
 		      /// \pre The argument should be a valid node ID in the graph.
 		      Node nodeFromId(int) const { return INVALID; }
 		      /// \brief Returns the arc with the given ID.
 		      ///
 		      /// \pre The argument should be a valid arc ID in the graph.
 		      Arc arcFromId(int) const { return INVALID; }
 		      /// \brief Returns an upper bound on the node IDs.
 		      int maxNodeId() const { return -1; }
 		      /// \brief Returns an upper bound on the arc IDs.
 		      int maxArcId() const { return -1; }
 		      void first(Node&) const {}
 		      void next(Node&) const {}
 		      void first(Arc&) const {}
 		      void next(Arc&) const {}
 		      void firstIn(Arc&, const Node&) const {}
 		      void nextIn(Arc&) const {}
 		      void firstOut(Arc&, const Node&) const {}
 		      void nextOut(Arc&) const {}
 		      // The second parameter is dummy.
 		      Node fromId(int, Node) const { return INVALID; }
 		      // The second parameter is dummy.
 		      Arc fromId(int, Arc) const { return INVALID; }
 		      // Dummy parameter.
 		      int maxId(Node) const { return -1; }
 		      // Dummy parameter.
 		      int maxId(Arc) const { return -1; }
 		      /// \brief The base node of the iterator.
 		      ///
 		      /// Gives back the base node of the iterator.
 		      /// It is always the target of the pointed arc.
 		      Node baseNode(const InArcIt&) const { return INVALID; }
 		      /// \brief The running node of the iterator.
 		      ///
 		      /// Gives back the running node of the iterator.
 		      /// It is always the source of the pointed arc.
 		      Node runningNode(const InArcIt&) const { return INVALID; }
 		      /// \brief The base node of the iterator.
 		      ///
 		      /// Gives back the base node of the iterator.
 		      /// It is always the source of the pointed arc.
 		      Node baseNode(const OutArcIt&) const { return INVALID; }
 		      /// \brief The running node of the iterator.
 		      ///
 		      /// Gives back the running node of the iterator.
 		      /// It is always the target of the pointed arc.
 		      Node runningNode(const OutArcIt&) const { return INVALID; }
 		      /// \brief The opposite node on the given arc.
 		      ///
 		      /// Gives back the opposite node on the given arc.
 		      Node oppositeNode(const Node&, const Arc&) const { return INVALID; }
 		      /// \brief Read write map of the nodes to type \c T.
 		      ///
 		      /// ReadWrite map of the nodes to type \c T.
 		      /// \sa Reference
 		      template<class T>
 		      class NodeMap : public ReadWriteMap< Node, T > {
 		      public:
 		        ///\e
 		        NodeMap(const Digraph&) { }
 		        ///\e
 		        NodeMap(const Digraph&, T) { }
 		        ///Copy constructor
 		        NodeMap(const NodeMap& nm) : ReadWriteMap< Node, T >(nm) { }
 		        ///Assignment operator
 		        template <typename CMap>
 		        NodeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Node, T>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// \brief Read write map of the arcs to type \c T.
 		      ///
 		      /// Reference map of the arcs to type \c T.
 		      /// \sa Reference
 		      template<class T>
 		      class ArcMap : public ReadWriteMap<Arc,T> {
 		      public:
 		        ///\e
 		        ArcMap(const Digraph&) { }
 		        ///\e
 		        ArcMap(const Digraph&, T) { }
 		        ///Copy constructor
 		        ArcMap(const ArcMap& em) : ReadWriteMap<Arc,T>(em) { }
 		        ///Assignment operator
 		        template <typename CMap>
 		        ArcMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Arc, T>, CMap>();
 		          return *this;
+		        }
 		      };
 		      template <typename _Digraph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<IterableDigraphComponent<>, _Digraph>();
 		          checkConcept<IDableDigraphComponent<>, _Digraph>();
 		          checkConcept<MappableDigraphComponent<>, _Digraph>();
+		        }
 		      };
 		    };
 		  } //namespace concepts
 		} //namespace lemon
 		#endif // LEMON_CONCEPT_DIGRAPH_H

lemon/concepts/graph.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup graph_concepts
 		///\file
 		///\brief The concept of Undirected Graphs.
 		#ifndef LEMON_CONCEPT_GRAPH_H
 		#define LEMON_CONCEPT_GRAPH_H
 		#include <lemon/concepts/graph_components.h>
 		#include <lemon/concepts/graph.h>
-		#include <lemon/bits/utility.h>
+		#include <lemon/core.h>
 		namespace lemon {
 		  namespace concepts {
 		    /// \ingroup graph_concepts
 		    ///
 		    /// \brief Class describing the concept of Undirected Graphs.
 		    ///
 		    /// This class describes the common interface of all Undirected
 		    /// Graphs.
 		    ///
 		    /// As all concept describing classes it provides only interface
 		    /// without any sensible implementation. So any algorithm for
 		    /// undirected graph should compile with this class, but it will not
 		    /// run properly, of course.
 		    ///
 		    /// The LEMON undirected graphs also fulfill the concept of
 		    /// directed graphs (\ref lemon::concepts::Digraph "Digraph
 		    /// Concept"). Each edges can be seen as two opposite
 		    /// directed arc and consequently the undirected graph can be
 		    /// seen as the direceted graph of these directed arcs. The
 		    /// Graph has the Edge inner class for the edges and
 		    /// the Arc type for the directed arcs. The Arc type is
 		    /// convertible to Edge or inherited from it so from a directed
 		    /// arc we can get the represented edge.
 		    ///
 		    /// In the sense of the LEMON each edge has a default
 		    /// direction (it should be in every computer implementation,
 		    /// because the order of edge's nodes defines an
 		    /// orientation). With the default orientation we can define that
 		    /// the directed arc is forward or backward directed. With the \c
 		    /// direction() and \c direct() function we can get the direction
 		    /// of the directed arc and we can direct an edge.
 		    ///
 		    /// The EdgeIt is an iterator for the edges. We can use
 		    /// the EdgeMap to map values for the edges. The InArcIt and
 		    /// OutArcIt iterates on the same edges but with opposite
 		    /// direction. The IncEdgeIt iterates also on the same edges
 		    /// as the OutArcIt and InArcIt but it is not convertible to Arc just
 		    /// to Edge.
 		    class Graph {
 		    public:
 		      /// \brief The undirected graph should be tagged by the
 		      /// UndirectedTag.
 		      ///
 		      /// The undirected graph should be tagged by the UndirectedTag. This
 		      /// tag helps the enable_if technics to make compile time
 		      /// specializations for undirected graphs.
 		      typedef True UndirectedTag;
 		      /// \brief The base type of node iterators,
 		      /// or in other words, the trivial node iterator.
 		      ///
 		      /// This is the base type of each node iterator,
 		      /// thus each kind of node iterator converts to this.
 		      /// More precisely each kind of node iterator should be inherited
 		      /// from the trivial node iterator.
 		      class Node {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        Node() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        Node(const Node&) { }
 		        /// Invalid constructor \& conversion.
 		        /// This constructor initializes the iterator to be invalid.
 		        /// \sa Invalid for more details.
 		        Node(Invalid) { }
 		        /// Equality operator
 		        /// Two iterators are equal if and only if they point to the
 		        /// same object or both are invalid.
 		        bool operator==(Node) const { return true; }
 		        /// Inequality operator
 		        /// \sa operator==(Node n)
 		        ///
 		        bool operator!=(Node) const { return true; }
 		        /// Artificial ordering operator.
 		        /// To allow the use of graph descriptors as key type in std::map or
 		        /// similar associative container we require this.
 		        ///
 		        /// \note This operator only have to define some strict ordering of
 		        /// the items; this order has nothing to do with the iteration
 		        /// ordering of the items.
 		        bool operator<(Node) const { return false; }
 		      };
 		      /// This iterator goes through each node.
 		      /// This iterator goes through each node.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of nodes in graph \c g of type \c Graph like this:
 		      ///\code
 		      /// int count=0;
 		      /// for (Graph::NodeIt n(g); n!=INVALID; ++n) ++count;
 		      ///\endcode
 		      class NodeIt : public Node {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        NodeIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        NodeIt(const NodeIt& n) : Node(n) { }
 		        /// Invalid constructor \& conversion.
 		        /// Initialize the iterator to be invalid.
 		        /// \sa Invalid for more details.
 		        NodeIt(Invalid) { }
 		        /// Sets the iterator to the first node.
 		        /// Sets the iterator to the first node of \c g.
 		        ///
 		        NodeIt(const Graph&) { }
 		        /// Node -> NodeIt conversion.
 		        /// Sets the iterator to the node of \c the graph pointed by
 		        /// the trivial iterator.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        NodeIt(const Graph&, const Node&) { }
 		        /// Next node.
 		        /// Assign the iterator to the next node.
 		        ///
 		        NodeIt& operator++() { return *this; }
 		      };
 		      /// The base type of the edge iterators.
 		      /// The base type of the edge iterators.
 		      ///
 		      class Edge {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        Edge() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        Edge(const Edge&) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        Edge(Invalid) { }
 		        /// Equality operator
 		        /// Two iterators are equal if and only if they point to the
 		        /// same object or both are invalid.
 		        bool operator==(Edge) const { return true; }
 		        /// Inequality operator
 		        /// \sa operator==(Edge n)
 		        ///
 		        bool operator!=(Edge) const { return true; }
 		        /// Artificial ordering operator.
 		        /// To allow the use of graph descriptors as key type in std::map or
 		        /// similar associative container we require this.
 		        ///
 		        /// \note This operator only have to define some strict ordering of
 		        /// the items; this order has nothing to do with the iteration
 		        /// ordering of the items.
 		        bool operator<(Edge) const { return false; }
 		      };
 		      /// This iterator goes through each edge.
 		      /// This iterator goes through each edge of a graph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of edges in a graph \c g of type \c Graph as follows:
 		      ///\code
 		      /// int count=0;
 		      /// for(Graph::EdgeIt e(g); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class EdgeIt : public Edge {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        EdgeIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        EdgeIt(const EdgeIt& e) : Edge(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        EdgeIt(Invalid) { }
 		        /// This constructor sets the iterator to the first edge.
 		        /// This constructor sets the iterator to the first edge.
 		        EdgeIt(const Graph&) { }
 		        /// Edge -> EdgeIt conversion
 		        /// Sets the iterator to the value of the trivial iterator.
 		        /// This feature necessitates that each time we
 		        /// iterate the edge-set, the iteration order is the
 		        /// same.
 		        EdgeIt(const Graph&, const Edge&) { }
 		        /// Next edge
 		        /// Assign the iterator to the next edge.
 		        EdgeIt& operator++() { return *this; }
 		      };
 		      /// \brief This iterator goes trough the incident undirected
 		      /// arcs of a node.
 		      ///
 		      /// This iterator goes trough the incident edges
 		      /// of a certain node of a graph. You should assume that the
 		      /// loop arcs will be iterated twice.
 		      ///
 		      /// Its usage is quite simple, for example you can compute the
 		      /// degree (i.e. count the number of incident arcs of a node \c n
 		      /// in graph \c g of type \c Graph as follows.
 		      ///
 		      ///\code
 		      /// int count=0;
 		      /// for(Graph::IncEdgeIt e(g, n); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class IncEdgeIt : public Edge {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        IncEdgeIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        IncEdgeIt(const IncEdgeIt& e) : Edge(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        IncEdgeIt(Invalid) { }
 		        /// This constructor sets the iterator to first incident arc.
 		        /// This constructor set the iterator to the first incident arc of
 		        /// the node.
 		        IncEdgeIt(const Graph&, const Node&) { }
 		        /// Edge -> IncEdgeIt conversion
 		        /// Sets the iterator to the value of the trivial iterator \c e.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        IncEdgeIt(const Graph&, const Edge&) { }
 		        /// Next incident arc
 		        /// Assign the iterator to the next incident arc
 		        /// of the corresponding node.
 		        IncEdgeIt& operator++() { return *this; }
 		      };
 		      /// The directed arc type.
 		      /// The directed arc type. It can be converted to the
 		      /// edge or it should be inherited from the undirected
 		      /// arc.
 		      class Arc : public Edge {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        Arc() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        Arc(const Arc& e) : Edge(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        Arc(Invalid) { }
 		        /// Equality operator
 		        /// Two iterators are equal if and only if they point to the
 		        /// same object or both are invalid.
 		        bool operator==(Arc) const { return true; }
 		        /// Inequality operator
 		        /// \sa operator==(Arc n)
 		        ///
 		        bool operator!=(Arc) const { return true; }
 		        /// Artificial ordering operator.
 		        /// To allow the use of graph descriptors as key type in std::map or
 		        /// similar associative container we require this.
 		        ///
 		        /// \note This operator only have to define some strict ordering of
 		        /// the items; this order has nothing to do with the iteration
 		        /// ordering of the items.
 		        bool operator<(Arc) const { return false; }
 		      };
 		      /// This iterator goes through each directed arc.
 		      /// This iterator goes through each arc of a graph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of arcs in a graph \c g of type \c Graph as follows:
 		      ///\code
 		      /// int count=0;
 		      /// for(Graph::ArcIt e(g); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class ArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        ArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        ArcIt(const ArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        ArcIt(Invalid) { }
 		        /// This constructor sets the iterator to the first arc.
 		        /// This constructor sets the iterator to the first arc of \c g.
 		        ///@param g the graph
 		        ArcIt(const Graph &g) { ignore_unused_variable_warning(g); }
 		        /// Arc -> ArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator \c e.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        ArcIt(const Graph&, const Arc&) { }
 		        ///Next arc
 		        /// Assign the iterator to the next arc.
 		        ArcIt& operator++() { return *this; }
 		      };
 		      /// This iterator goes trough the outgoing directed arcs of a node.
 		      /// This iterator goes trough the \e outgoing arcs of a certain node
 		      /// of a graph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of outgoing arcs of a node \c n
 		      /// in graph \c g of type \c Graph as follows.
 		      ///\code
 		      /// int count=0;
 		      /// for (Graph::OutArcIt e(g, n); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class OutArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        OutArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        OutArcIt(const OutArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        OutArcIt(Invalid) { }
 		        /// This constructor sets the iterator to the first outgoing arc.
 		        /// This constructor sets the iterator to the first outgoing arc of
 		        /// the node.
 		        ///@param n the node
 		        ///@param g the graph
 		        OutArcIt(const Graph& n, const Node& g) {
 		          ignore_unused_variable_warning(n);
 		          ignore_unused_variable_warning(g);
+		        }
 		        /// Arc -> OutArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        OutArcIt(const Graph&, const Arc&) { }
 		        ///Next outgoing arc
 		        /// Assign the iterator to the next
 		        /// outgoing arc of the corresponding node.
 		        OutArcIt& operator++() { return *this; }
 		      };
 		      /// This iterator goes trough the incoming directed arcs of a node.
 		      /// This iterator goes trough the \e incoming arcs of a certain node
 		      /// of a graph.
 		      /// Its usage is quite simple, for example you can count the number
 		      /// of outgoing arcs of a node \c n
 		      /// in graph \c g of type \c Graph as follows.
 		      ///\code
 		      /// int count=0;
 		      /// for(Graph::InArcIt e(g, n); e!=INVALID; ++e) ++count;
 		      ///\endcode
 		      class InArcIt : public Arc {
 		      public:
 		        /// Default constructor
 		        /// @warning The default constructor sets the iterator
 		        /// to an undefined value.
 		        InArcIt() { }
 		        /// Copy constructor.
 		        /// Copy constructor.
 		        ///
 		        InArcIt(const InArcIt& e) : Arc(e) { }
 		        /// Initialize the iterator to be invalid.
 		        /// Initialize the iterator to be invalid.
 		        ///
 		        InArcIt(Invalid) { }
 		        /// This constructor sets the iterator to first incoming arc.
 		        /// This constructor set the iterator to the first incoming arc of
 		        /// the node.
 		        ///@param n the node
 		        ///@param g the graph
 		        InArcIt(const Graph& g, const Node& n) {
 		          ignore_unused_variable_warning(n);
 		          ignore_unused_variable_warning(g);
+		        }
 		        /// Arc -> InArcIt conversion
 		        /// Sets the iterator to the value of the trivial iterator \c e.
 		        /// This feature necessitates that each time we
 		        /// iterate the arc-set, the iteration order is the same.
 		        InArcIt(const Graph&, const Arc&) { }
 		        /// Next incoming arc
 		        /// Assign the iterator to the next inarc of the corresponding node.
 		        ///
 		        InArcIt& operator++() { return *this; }
 		      };
 		      /// \brief Read write map of the nodes to type \c T.
 		      ///
 		      /// ReadWrite map of the nodes to type \c T.
 		      /// \sa Reference
 		      template<class T>
 		      class NodeMap : public ReadWriteMap< Node, T >
+		      {
 		      public:
 		        ///\e
 		        NodeMap(const Graph&) { }
 		        ///\e
 		        NodeMap(const Graph&, T) { }
 		        ///Copy constructor
 		        NodeMap(const NodeMap& nm) : ReadWriteMap< Node, T >(nm) { }
 		        ///Assignment operator
 		        template <typename CMap>
 		        NodeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Node, T>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// \brief Read write map of the directed arcs to type \c T.
 		      ///
 		      /// Reference map of the directed arcs to type \c T.
 		      /// \sa Reference
 		      template<class T>
 		      class ArcMap : public ReadWriteMap<Arc,T>
+		      {
 		      public:
 		        ///\e
 		        ArcMap(const Graph&) { }
 		        ///\e
 		        ArcMap(const Graph&, T) { }
 		        ///Copy constructor
 		        ArcMap(const ArcMap& em) : ReadWriteMap<Arc,T>(em) { }
 		        ///Assignment operator
 		        template <typename CMap>
 		        ArcMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Arc, T>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// Read write map of the edges to type \c T.
 		      /// Reference map of the arcs to type \c T.
 		      /// \sa Reference
 		      template<class T>
 		      class EdgeMap : public ReadWriteMap<Edge,T>
+		      {
 		      public:
 		        ///\e
 		        EdgeMap(const Graph&) { }
 		        ///\e
 		        EdgeMap(const Graph&, T) { }
 		        ///Copy constructor
 		        EdgeMap(const EdgeMap& em) : ReadWriteMap<Edge,T>(em) {}
 		        ///Assignment operator
 		        template <typename CMap>
 		        EdgeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Edge, T>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// \brief Direct the given edge.
 		      ///
 		      /// Direct the given edge. The returned arc source
 		      /// will be the given node.
 		      Arc direct(const Edge&, const Node&) const {
 		        return INVALID;
+		      }
 		      /// \brief Direct the given edge.
 		      ///
 		      /// Direct the given edge. The returned arc
 		      /// represents the given edge and the direction comes
 		      /// from the bool parameter. The source of the edge and
 		      /// the directed arc is the same when the given bool is true.
 		      Arc direct(const Edge&, bool) const {
 		        return INVALID;
+		      }
 		      /// \brief Returns true if the arc has default orientation.
 		      ///
 		      /// Returns whether the given directed arc is same orientation as
 		      /// the corresponding edge's default orientation.
 		      bool direction(Arc) const { return true; }
 		      /// \brief Returns the opposite directed arc.
 		      ///
 		      /// Returns the opposite directed arc.
 		      Arc oppositeArc(Arc) const { return INVALID; }
 		      /// \brief Opposite node on an arc
 		      ///
 		      /// \return the opposite of the given Node on the given Edge
 		      Node oppositeNode(Node, Edge) const { return INVALID; }
 		      /// \brief First node of the edge.
 		      ///
 		      /// \return the first node of the given Edge.
 		      ///
 		      /// Naturally edges don't have direction and thus
 		      /// don't have source and target node. But we use these two methods
 		      /// to query the two nodes of the arc. The direction of the arc
 		      /// which arises this way is called the inherent direction of the
 		      /// edge, and is used to define the "default" direction
 		      /// of the directed versions of the arcs.
 		      /// \sa direction
 		      Node u(Edge) const { return INVALID; }
 		      /// \brief Second node of the edge.
 		      Node v(Edge) const { return INVALID; }
 		      /// \brief Source node of the directed arc.
 		      Node source(Arc) const { return INVALID; }
 		      /// \brief Target node of the directed arc.
 		      Node target(Arc) const { return INVALID; }
 		      /// \brief Returns the id of the node.
 		      int id(Node) const { return -1; }
 		      /// \brief Returns the id of the edge.
 		      int id(Edge) const { return -1; }
 		      /// \brief Returns the id of the arc.
 		      int id(Arc) const { return -1; }
 		      /// \brief Returns the node with the given id.
 		      ///
 		      /// \pre The argument should be a valid node id in the graph.
 		      Node nodeFromId(int) const { return INVALID; }
 		      /// \brief Returns the edge with the given id.
 		      ///
 		      /// \pre The argument should be a valid edge id in the graph.
 		      Edge edgeFromId(int) const { return INVALID; }
 		      /// \brief Returns the arc with the given id.
 		      ///
 		      /// \pre The argument should be a valid arc id in the graph.
 		      Arc arcFromId(int) const { return INVALID; }
 		      /// \brief Returns an upper bound on the node IDs.
 		      int maxNodeId() const { return -1; }
 		      /// \brief Returns an upper bound on the edge IDs.
 		      int maxEdgeId() const { return -1; }
 		      /// \brief Returns an upper bound on the arc IDs.
 		      int maxArcId() const { return -1; }
 		      void first(Node&) const {}
 		      void next(Node&) const {}
 		      void first(Edge&) const {}
 		      void next(Edge&) const {}
 		      void first(Arc&) const {}
 		      void next(Arc&) const {}
 		      void firstOut(Arc&, Node) const {}
 		      void nextOut(Arc&) const {}
 		      void firstIn(Arc&, Node) const {}
 		      void nextIn(Arc&) const {}
 		      void firstInc(Edge &, bool &, const Node &) const {}
 		      void nextInc(Edge &, bool &) const {}
 		      // The second parameter is dummy.
 		      Node fromId(int, Node) const { return INVALID; }
 		      // The second parameter is dummy.
 		      Edge fromId(int, Edge) const { return INVALID; }
 		      // The second parameter is dummy.
 		      Arc fromId(int, Arc) const { return INVALID; }
 		      // Dummy parameter.
 		      int maxId(Node) const { return -1; }
 		      // Dummy parameter.
 		      int maxId(Edge) const { return -1; }
 		      // Dummy parameter.
 		      int maxId(Arc) const { return -1; }
 		      /// \brief Base node of the iterator
 		      ///
 		      /// Returns the base node (the source in this case) of the iterator
 		      Node baseNode(OutArcIt e) const {
 		        return source(e);
+		      }
 		      /// \brief Running node of the iterator
 		      ///
 		      /// Returns the running node (the target in this case) of the
 		      /// iterator
 		      Node runningNode(OutArcIt e) const {
 		        return target(e);
+		      }
 		      /// \brief Base node of the iterator
 		      ///
 		      /// Returns the base node (the target in this case) of the iterator
 		      Node baseNode(InArcIt e) const {
 		        return target(e);
+		      }
 		      /// \brief Running node of the iterator
 		      ///
 		      /// Returns the running node (the source in this case) of the
 		      /// iterator
 		      Node runningNode(InArcIt e) const {
 		        return source(e);
+		      }
 		      /// \brief Base node of the iterator
 		      ///
 		      /// Returns the base node of the iterator
 		      Node baseNode(IncEdgeIt) const {
 		        return INVALID;
+		      }
 		      /// \brief Running node of the iterator
 		      ///
 		      /// Returns the running node of the iterator
 		      Node runningNode(IncEdgeIt) const {
 		        return INVALID;
+		      }
 		      template <typename _Graph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<IterableGraphComponent<>, _Graph>();
 		          checkConcept<IDableGraphComponent<>, _Graph>();
 		          checkConcept<MappableGraphComponent<>, _Graph>();
+		        }
 		      };
 		    };
+		  }
+		}
 		#endif

lemon/concepts/graph_components.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup graph_concepts
 		///\file
 		///\brief The concept of graph components.
 		#ifndef LEMON_CONCEPT_GRAPH_COMPONENTS_H
 		#define LEMON_CONCEPT_GRAPH_COMPONENTS_H
-		#include <lemon/bits/invalid.h>
+		#include <lemon/core.h>
 		#include <lemon/concepts/maps.h>
 		#include <lemon/bits/alteration_notifier.h>
 		namespace lemon {
 		  namespace concepts {
 		    /// \brief Skeleton class for graph Node and Arc types
 		    ///
 		    /// This class describes the interface of Node and Arc (and Edge
 		    /// in undirected graphs) subtypes of graph types.
 		    ///
 		    /// \note This class is a template class so that we can use it to
 		    /// create graph skeleton classes. The reason for this is than Node
 		    /// and Arc types should \em not derive from the same base class.
 		    /// For Node you should instantiate it with character 'n' and for Arc
 		    /// with 'a'.
 		#ifndef DOXYGEN
 		    template <char _selector = '0'>
 		#endif
 		    class GraphItem {
 		    public:
 		      /// \brief Default constructor.
 		      ///
 		      /// \warning The default constructor is not required to set
 		      /// the item to some well-defined value. So you should consider it
 		      /// as uninitialized.
 		      GraphItem() {}
 		      /// \brief Copy constructor.
 		      ///
 		      /// Copy constructor.
 		      ///
 		      GraphItem(const GraphItem &) {}
 		      /// \brief Invalid constructor \& conversion.
 		      ///
 		      /// This constructor initializes the item to be invalid.
 		      /// \sa Invalid for more details.
 		      GraphItem(Invalid) {}
 		      /// \brief Assign operator for nodes.
 		      ///
 		      /// The nodes are assignable.
 		      ///
 		      GraphItem& operator=(GraphItem const&) { return *this; }
 		      /// \brief Equality operator.
 		      ///
 		      /// Two iterators are equal if and only if they represents the
 		      /// same node in the graph or both are invalid.
 		      bool operator==(GraphItem) const { return false; }
 		      /// \brief Inequality operator.
 		      ///
 		      /// \sa operator==(const Node& n)
 		      ///
 		      bool operator!=(GraphItem) const { return false; }
 		      /// \brief Artificial ordering operator.
 		      ///
 		      /// To allow the use of graph descriptors as key type in std::map or
 		      /// similar associative container we require this.
 		      ///
 		      /// \note This operator only have to define some strict ordering of
 		      /// the items; this order has nothing to do with the iteration
 		      /// ordering of the items.
 		      bool operator<(GraphItem) const { return false; }
 		      template<typename _GraphItem>
 		      struct Constraints {
 		        void constraints() {
 		          _GraphItem i1;
 		          _GraphItem i2 = i1;
 		          _GraphItem i3 = INVALID;
 		          i1 = i2 = i3;
 		          bool b;
 		          //          b = (ia == ib) && (ia != ib) && (ia < ib);
 		          b = (ia == ib) && (ia != ib);
 		          b = (ia == INVALID) && (ib != INVALID);
 		          b = (ia < ib);
+		        }
 		        const _GraphItem &ia;
 		        const _GraphItem &ib;
 		      };
 		    };
 		    /// \brief An empty base directed graph class.
 		    ///
 		    /// This class provides the minimal set of features needed for a
 		    /// directed graph structure. All digraph concepts have to be
 		    /// conform to this base directed graph. It just provides types
 		    /// for nodes and arcs and functions to get the source and the
 		    /// target of the arcs.
 		    class BaseDigraphComponent {
 		    public:
 		      typedef BaseDigraphComponent Digraph;
 		      /// \brief Node class of the digraph.
 		      ///
 		      /// This class represents the Nodes of the digraph.
 		      ///
 		      typedef GraphItem<'n'> Node;
 		      /// \brief Arc class of the digraph.
 		      ///
 		      /// This class represents the Arcs of the digraph.
 		      ///
 		      typedef GraphItem<'e'> Arc;
 		      /// \brief Gives back the target node of an arc.
 		      ///
 		      /// Gives back the target node of an arc.
 		      ///
 		      Node target(const Arc&) const { return INVALID;}
 		      /// \brief Gives back the source node of an arc.
 		      ///
 		      /// Gives back the source node of an arc.
 		      ///
 		      Node source(const Arc&) const { return INVALID;}
 		      /// \brief Gives back the opposite node on the given arc.
 		      ///
 		      /// Gives back the opposite node on the given arc.
 		      Node oppositeNode(const Node&, const Arc&) const {
 		        return INVALID;
+		      }
 		      template <typename _Digraph>
 		      struct Constraints {
 		        typedef typename _Digraph::Node Node;
 		        typedef typename _Digraph::Arc Arc;
 		        void constraints() {
 		          checkConcept<GraphItem<'n'>, Node>();
 		          checkConcept<GraphItem<'a'>, Arc>();
+		          {
 		            Node n;
 		            Arc e(INVALID);
 		            n = digraph.source(e);
 		            n = digraph.target(e);
 		            n = digraph.oppositeNode(n, e);
+		          }
+		        }
 		        const _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty base undirected graph class.
 		    ///
 		    /// This class provides the minimal set of features needed for an
 		    /// undirected graph structure. All undirected graph concepts have
 		    /// to be conform to this base graph. It just provides types for
 		    /// nodes, arcs and edges and functions to get the
 		    /// source and the target of the arcs and edges,
 		    /// conversion from arcs to edges and function to get
 		    /// both direction of the edges.
 		    class BaseGraphComponent : public BaseDigraphComponent {
 		    public:
 		      typedef BaseDigraphComponent::Node Node;
 		      typedef BaseDigraphComponent::Arc Arc;
 		      /// \brief Undirected arc class of the graph.
 		      ///
 		      /// This class represents the edges of the graph.
 		      /// The undirected graphs can be used as a directed graph which
 		      /// for each arc contains the opposite arc too so the graph is
 		      /// bidirected. The edge represents two opposite
 		      /// directed arcs.
 		      class Edge : public GraphItem<'u'> {
 		      public:
 		        typedef GraphItem<'u'> Parent;
 		        /// \brief Default constructor.
 		        ///
 		        /// \warning The default constructor is not required to set
 		        /// the item to some well-defined value. So you should consider it
 		        /// as uninitialized.
 		        Edge() {}
 		        /// \brief Copy constructor.
 		        ///
 		        /// Copy constructor.
 		        ///
 		        Edge(const Edge &) : Parent() {}
 		        /// \brief Invalid constructor \& conversion.
 		        ///
 		        /// This constructor initializes the item to be invalid.
 		        /// \sa Invalid for more details.
 		        Edge(Invalid) {}
 		        /// \brief Converter from arc to edge.
 		        ///
 		        /// Besides the core graph item functionality each arc should
 		        /// be convertible to the represented edge.
 		        Edge(const Arc&) {}
 		        /// \brief Assign arc to edge.
 		        ///
 		        /// Besides the core graph item functionality each arc should
 		        /// be convertible to the represented edge.
 		        Edge& operator=(const Arc&) { return *this; }
 		      };
 		      /// \brief Returns the direction of the arc.
 		      ///
 		      /// Returns the direction of the arc. Each arc represents an
 		      /// edge with a direction. It gives back the
 		      /// direction.
 		      bool direction(const Arc&) const { return true; }
 		      /// \brief Returns the directed arc.
 		      ///
 		      /// Returns the directed arc from its direction and the
 		      /// represented edge.
 		      Arc direct(const Edge&, bool) const { return INVALID;}
 		      /// \brief Returns the directed arc.
 		      ///
 		      /// Returns the directed arc from its source and the
 		      /// represented edge.
 		      Arc direct(const Edge&, const Node&) const { return INVALID;}
 		      /// \brief Returns the opposite arc.
 		      ///
 		      /// Returns the opposite arc. It is the arc representing the
 		      /// same edge and has opposite direction.
 		      Arc oppositeArc(const Arc&) const { return INVALID;}
 		      /// \brief Gives back one ending of an edge.
 		      ///
 		      /// Gives back one ending of an edge.
 		      Node u(const Edge&) const { return INVALID;}
 		      /// \brief Gives back the other ending of an edge.
 		      ///
 		      /// Gives back the other ending of an edge.
 		      Node v(const Edge&) const { return INVALID;}
 		      template <typename _Graph>
 		      struct Constraints {
 		        typedef typename _Graph::Node Node;
 		        typedef typename _Graph::Arc Arc;
 		        typedef typename _Graph::Edge Edge;
 		        void constraints() {
 		          checkConcept<BaseDigraphComponent, _Graph>();
 		          checkConcept<GraphItem<'u'>, Edge>();
+		          {
 		            Node n;
 		            Edge ue(INVALID);
 		            Arc e;
 		            n = graph.u(ue);
 		            n = graph.v(ue);
 		            e = graph.direct(ue, true);
 		            e = graph.direct(ue, n);
 		            e = graph.oppositeArc(e);
 		            ue = e;
 		            bool d = graph.direction(e);
 		            ignore_unused_variable_warning(d);
+		          }
+		        }
 		        const _Graph& graph;
 		      };
 		    };
 		    /// \brief An empty idable base digraph class.
 		    ///
 		    /// This class provides beside the core digraph features
 		    /// core id functions for the digraph structure.
 		    /// The most of the base digraphs should be conform to this concept.
 		    /// The id's are unique and immutable.
 		    template <typename _Base = BaseDigraphComponent>
 		    class IDableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      /// \brief Gives back an unique integer id for the Node.
 		      ///
 		      /// Gives back an unique integer id for the Node.
 		      ///
 		      int id(const Node&) const { return -1;}
 		      /// \brief Gives back the node by the unique id.
 		      ///
 		      /// Gives back the node by the unique id.
 		      /// If the digraph does not contain node with the given id
 		      /// then the result of the function is undetermined.
 		      Node nodeFromId(int) const { return INVALID;}
 		      /// \brief Gives back an unique integer id for the Arc.
 		      ///
 		      /// Gives back an unique integer id for the Arc.
 		      ///
 		      int id(const Arc&) const { return -1;}
 		      /// \brief Gives back the arc by the unique id.
 		      ///
 		      /// Gives back the arc by the unique id.
 		      /// If the digraph does not contain arc with the given id
 		      /// then the result of the function is undetermined.
 		      Arc arcFromId(int) const { return INVALID;}
 		      /// \brief Gives back an integer greater or equal to the maximum
 		      /// Node id.
 		      ///
 		      /// Gives back an integer greater or equal to the maximum Node
 		      /// id.
 		      int maxNodeId() const { return -1;}
 		      /// \brief Gives back an integer greater or equal to the maximum
 		      /// Arc id.
 		      ///
 		      /// Gives back an integer greater or equal to the maximum Arc
 		      /// id.
 		      int maxArcId() const { return -1;}
 		      template <typename _Digraph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Digraph >();
 		          typename _Digraph::Node node;
 		          int nid = digraph.id(node);
 		          nid = digraph.id(node);
 		          node = digraph.nodeFromId(nid);
 		          typename _Digraph::Arc arc;
 		          int eid = digraph.id(arc);
 		          eid = digraph.id(arc);
 		          arc = digraph.arcFromId(eid);
 		          nid = digraph.maxNodeId();
 		          ignore_unused_variable_warning(nid);
 		          eid = digraph.maxArcId();
 		          ignore_unused_variable_warning(eid);
+		        }
 		        const _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty idable base undirected graph class.
 		    ///
 		    /// This class provides beside the core undirected graph features
 		    /// core id functions for the undirected graph structure.  The
 		    /// most of the base undirected graphs should be conform to this
 		    /// concept.  The id's are unique and immutable.
 		    template <typename _Base = BaseGraphComponent>
 		    class IDableGraphComponent : public IDableDigraphComponent<_Base> {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Edge Edge;
 		      using IDableDigraphComponent<_Base>::id;
 		      /// \brief Gives back an unique integer id for the Edge.
 		      ///
 		      /// Gives back an unique integer id for the Edge.
 		      ///
 		      int id(const Edge&) const { return -1;}
 		      /// \brief Gives back the edge by the unique id.
 		      ///
 		      /// Gives back the edge by the unique id.  If the
 		      /// graph does not contain arc with the given id then the
 		      /// result of the function is undetermined.
 		      Edge edgeFromId(int) const { return INVALID;}
 		      /// \brief Gives back an integer greater or equal to the maximum
 		      /// Edge id.
 		      ///
 		      /// Gives back an integer greater or equal to the maximum Edge
 		      /// id.
 		      int maxEdgeId() const { return -1;}
 		      template <typename _Graph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Graph >();
 		          checkConcept<IDableDigraphComponent<Base>, _Graph >();
 		          typename _Graph::Edge edge;
 		          int ueid = graph.id(edge);
 		          ueid = graph.id(edge);
 		          edge = graph.edgeFromId(ueid);
 		          ueid = graph.maxEdgeId();
 		          ignore_unused_variable_warning(ueid);
+		        }
 		        const _Graph& graph;
 		      };
 		    };
 		    /// \brief Skeleton class for graph NodeIt and ArcIt
 		    ///
 		    /// Skeleton class for graph NodeIt and ArcIt.
 		    ///
 		    template <typename _Graph, typename _Item>
 		    class GraphItemIt : public _Item {
 		    public:
 		      /// \brief Default constructor.
 		      ///
 		      /// @warning The default constructor sets the iterator
 		      /// to an undefined value.
 		      GraphItemIt() {}
 		      /// \brief Copy constructor.
 		      ///
 		      /// Copy constructor.
 		      ///
 		      GraphItemIt(const GraphItemIt& ) {}
 		      /// \brief Sets the iterator to the first item.
 		      ///
 		      /// Sets the iterator to the first item of \c the graph.
 		      ///
 		      explicit GraphItemIt(const _Graph&) {}
 		      /// \brief Invalid constructor \& conversion.
 		      ///
 		      /// This constructor initializes the item to be invalid.
 		      /// \sa Invalid for more details.
 		      GraphItemIt(Invalid) {}
 		      /// \brief Assign operator for items.
 		      ///
 		      /// The items are assignable.
 		      ///
 		      GraphItemIt& operator=(const GraphItemIt&) { return *this; }
 		      /// \brief Next item.
 		      ///
 		      /// Assign the iterator to the next item.
 		      ///
 		      GraphItemIt& operator++() { return *this; }
 		      /// \brief Equality operator
 		      ///
 		      /// Two iterators are equal if and only if they point to the
 		      /// same object or both are invalid.
 		      bool operator==(const GraphItemIt&) const { return true;}
 		      /// \brief Inequality operator
 		      ///
 		      /// \sa operator==(Node n)
 		      ///
 		      bool operator!=(const GraphItemIt&) const { return true;}
 		      template<typename _GraphItemIt>
 		      struct Constraints {
 		        void constraints() {
 		          _GraphItemIt it1(g);
 		          _GraphItemIt it2;
 		          it2 = ++it1;
 		          ++it2 = it1;
 		          ++(++it1);
 		          _Item bi = it1;
 		          bi = it2;
+		        }
 		        _Graph& g;
 		      };
 		    };
 		    /// \brief Skeleton class for graph InArcIt and OutArcIt
 		    ///
 		    /// \note Because InArcIt and OutArcIt may not inherit from the same
 		    /// base class, the _selector is a additional template parameter. For
 		    /// InArcIt you should instantiate it with character 'i' and for
 		    /// OutArcIt with 'o'.
 		    template <typename _Graph,
 		              typename _Item = typename _Graph::Arc,
 		              typename _Base = typename _Graph::Node,
 		              char _selector = '0'>
 		    class GraphIncIt : public _Item {
 		    public:
 		      /// \brief Default constructor.
 		      ///
 		      /// @warning The default constructor sets the iterator
 		      /// to an undefined value.
 		      GraphIncIt() {}
 		      /// \brief Copy constructor.
 		      ///
 		      /// Copy constructor.
 		      ///
 		      GraphIncIt(GraphIncIt const& gi) : _Item(gi) {}
 		      /// \brief Sets the iterator to the first arc incoming into or outgoing
 		      /// from the node.
 		      ///
 		      /// Sets the iterator to the first arc incoming into or outgoing
 		      /// from the node.
 		      ///
 		      explicit GraphIncIt(const _Graph&, const _Base&) {}
 		      /// \brief Invalid constructor \& conversion.
 		      ///
 		      /// This constructor initializes the item to be invalid.
 		      /// \sa Invalid for more details.
 		      GraphIncIt(Invalid) {}
 		      /// \brief Assign operator for iterators.
 		      ///
 		      /// The iterators are assignable.
 		      ///
 		      GraphIncIt& operator=(GraphIncIt const&) { return *this; }
 		      /// \brief Next item.
 		      ///
 		      /// Assign the iterator to the next item.
 		      ///
 		      GraphIncIt& operator++() { return *this; }
 		      /// \brief Equality operator
 		      ///
 		      /// Two iterators are equal if and only if they point to the
 		      /// same object or both are invalid.
 		      bool operator==(const GraphIncIt&) const { return true;}
 		      /// \brief Inequality operator
 		      ///
 		      /// \sa operator==(Node n)
 		      ///
 		      bool operator!=(const GraphIncIt&) const { return true;}
 		      template <typename _GraphIncIt>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<GraphItem<_selector>, _GraphIncIt>();
 		          _GraphIncIt it1(graph, node);
 		          _GraphIncIt it2;
 		          it2 = ++it1;
 		          ++it2 = it1;
 		          ++(++it1);
 		          _Item e = it1;
 		          e = it2;
+		        }
 		        _Item arc;
 		        _Base node;
 		        _Graph graph;
 		        _GraphIncIt it;
 		      };
 		    };
 		    /// \brief An empty iterable digraph class.
 		    ///
 		    /// This class provides beside the core digraph features
 		    /// iterator based iterable interface for the digraph structure.
 		    /// This concept is part of the Digraph concept.
 		    template <typename _Base = BaseDigraphComponent>
 		    class IterableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      typedef IterableDigraphComponent Digraph;
 		      /// \name Base iteration
 		      ///
 		      /// This interface provides functions for iteration on digraph items
 		      ///
 		      /// @{
 		      /// \brief Gives back the first node in the iterating order.
 		      ///
 		      /// Gives back the first node in the iterating order.
 		      ///
 		      void first(Node&) const {}
 		      /// \brief Gives back the next node in the iterating order.
 		      ///
 		      /// Gives back the next node in the iterating order.
 		      ///
 		      void next(Node&) const {}
 		      /// \brief Gives back the first arc in the iterating order.
 		      ///
 		      /// Gives back the first arc in the iterating order.
 		      ///
 		      void first(Arc&) const {}
 		      /// \brief Gives back the next arc in the iterating order.
 		      ///
 		      /// Gives back the next arc in the iterating order.
 		      ///
 		      void next(Arc&) const {}
 		      /// \brief Gives back the first of the arcs point to the given
 		      /// node.
 		      ///
 		      /// Gives back the first of the arcs point to the given node.
 		      ///
 		      void firstIn(Arc&, const Node&) const {}
 		      /// \brief Gives back the next of the arcs points to the given
 		      /// node.
 		      ///
 		      /// Gives back the next of the arcs points to the given node.
 		      ///
 		      void nextIn(Arc&) const {}
 		      /// \brief Gives back the first of the arcs start from the
 		      /// given node.
 		      ///
 		      /// Gives back the first of the arcs start from the given node.
 		      ///
 		      void firstOut(Arc&, const Node&) const {}
 		      /// \brief Gives back the next of the arcs start from the given
 		      /// node.
 		      ///
 		      /// Gives back the next of the arcs start from the given node.
 		      ///
 		      void nextOut(Arc&) const {}
 		      /// @}
 		      /// \name Class based iteration
 		      ///
 		      /// This interface provides functions for iteration on digraph items
 		      ///
 		      /// @{
 		      /// \brief This iterator goes through each node.
 		      ///
 		      /// This iterator goes through each node.
 		      ///
 		      typedef GraphItemIt<Digraph, Node> NodeIt;
 		      /// \brief This iterator goes through each node.
 		      ///
 		      /// This iterator goes through each node.
 		      ///
 		      typedef GraphItemIt<Digraph, Arc> ArcIt;
 		      /// \brief This iterator goes trough the incoming arcs of a node.
 		      ///
 		      /// This iterator goes trough the \e inccoming arcs of a certain node
 		      /// of a digraph.
 		      typedef GraphIncIt<Digraph, Arc, Node, 'i'> InArcIt;
 		      /// \brief This iterator goes trough the outgoing arcs of a node.
 		      ///
 		      /// This iterator goes trough the \e outgoing arcs of a certain node
 		      /// of a digraph.
 		      typedef GraphIncIt<Digraph, Arc, Node, 'o'> OutArcIt;
 		      /// \brief The base node of the iterator.
 		      ///
 		      /// Gives back the base node of the iterator.
 		      /// It is always the target of the pointed arc.
 		      Node baseNode(const InArcIt&) const { return INVALID; }
 		      /// \brief The running node of the iterator.
 		      ///
 		      /// Gives back the running node of the iterator.
 		      /// It is always the source of the pointed arc.
 		      Node runningNode(const InArcIt&) const { return INVALID; }
 		      /// \brief The base node of the iterator.
 		      ///
 		      /// Gives back the base node of the iterator.
 		      /// It is always the source of the pointed arc.
 		      Node baseNode(const OutArcIt&) const { return INVALID; }
 		      /// \brief The running node of the iterator.
 		      ///
 		      /// Gives back the running node of the iterator.
 		      /// It is always the target of the pointed arc.
 		      Node runningNode(const OutArcIt&) const { return INVALID; }
 		      /// @}
 		      template <typename _Digraph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Digraph>();
+		          {
 		            typename _Digraph::Node node(INVALID);
 		            typename _Digraph::Arc arc(INVALID);
+		            {
 		              digraph.first(node);
 		              digraph.next(node);
+		            }
+		            {
 		              digraph.first(arc);
 		              digraph.next(arc);
+		            }
+		            {
 		              digraph.firstIn(arc, node);
 		              digraph.nextIn(arc);
+		            }
+		            {
 		              digraph.firstOut(arc, node);
 		              digraph.nextOut(arc);
+		            }
+		          }
+		          {
 		            checkConcept<GraphItemIt<_Digraph, typename _Digraph::Arc>,
 		              typename _Digraph::ArcIt >();
 		            checkConcept<GraphItemIt<_Digraph, typename _Digraph::Node>,
 		              typename _Digraph::NodeIt >();
 		            checkConcept<GraphIncIt<_Digraph, typename _Digraph::Arc,
 		              typename _Digraph::Node, 'i'>, typename _Digraph::InArcIt>();
 		            checkConcept<GraphIncIt<_Digraph, typename _Digraph::Arc,
 		              typename _Digraph::Node, 'o'>, typename _Digraph::OutArcIt>();
 		            typename _Digraph::Node n;
 		            typename _Digraph::InArcIt ieit(INVALID);
 		            typename _Digraph::OutArcIt oeit(INVALID);
 		            n = digraph.baseNode(ieit);
 		            n = digraph.runningNode(ieit);
 		            n = digraph.baseNode(oeit);
 		            n = digraph.runningNode(oeit);
 		            ignore_unused_variable_warning(n);
+		          }
+		        }
 		        const _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty iterable undirected graph class.
 		    ///
 		    /// This class provides beside the core graph features iterator
 		    /// based iterable interface for the undirected graph structure.
 		    /// This concept is part of the Graph concept.
 		    template <typename _Base = BaseGraphComponent>
 		    class IterableGraphComponent : public IterableDigraphComponent<_Base> {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      typedef typename Base::Edge Edge;
 		      typedef IterableGraphComponent Graph;
 		      /// \name Base iteration
 		      ///
 		      /// This interface provides functions for iteration on graph items
 		      /// @{
 		      using IterableDigraphComponent<_Base>::first;
 		      using IterableDigraphComponent<_Base>::next;
 		      /// \brief Gives back the first edge in the iterating
 		      /// order.
 		      ///
 		      /// Gives back the first edge in the iterating order.
 		      ///
 		      void first(Edge&) const {}
 		      /// \brief Gives back the next edge in the iterating
 		      /// order.
 		      ///
 		      /// Gives back the next edge in the iterating order.
 		      ///
 		      void next(Edge&) const {}
 		      /// \brief Gives back the first of the edges from the
 		      /// given node.
 		      ///
 		      /// Gives back the first of the edges from the given
 		      /// node. The bool parameter gives back that direction which
 		      /// gives a good direction of the edge so the source of the
 		      /// directed arc is the given node.
 		      void firstInc(Edge&, bool&, const Node&) const {}
 		      /// \brief Gives back the next of the edges from the
 		      /// given node.
 		      ///
 		      /// Gives back the next of the edges from the given
 		      /// node. The bool parameter should be used as the \c firstInc()
 		      /// use it.
 		      void nextInc(Edge&, bool&) const {}
 		      using IterableDigraphComponent<_Base>::baseNode;
 		      using IterableDigraphComponent<_Base>::runningNode;
 		      /// @}
 		      /// \name Class based iteration
 		      ///
 		      /// This interface provides functions for iteration on graph items
 		      ///
 		      /// @{
 		      /// \brief This iterator goes through each node.
 		      ///
 		      /// This iterator goes through each node.
 		      typedef GraphItemIt<Graph, Edge> EdgeIt;
 		      /// \brief This iterator goes trough the incident arcs of a
 		      /// node.
 		      ///
 		      /// This iterator goes trough the incident arcs of a certain
 		      /// node of a graph.
 		      typedef GraphIncIt<Graph, Edge, Node, 'u'> IncEdgeIt;
 		      /// \brief The base node of the iterator.
 		      ///
 		      /// Gives back the base node of the iterator.
 		      Node baseNode(const IncEdgeIt&) const { return INVALID; }
 		      /// \brief The running node of the iterator.
 		      ///
 		      /// Gives back the running node of the iterator.
 		      Node runningNode(const IncEdgeIt&) const { return INVALID; }
 		      /// @}
 		      template <typename _Graph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<IterableDigraphComponent<Base>, _Graph>();
+		          {
 		            typename _Graph::Node node(INVALID);
 		            typename _Graph::Edge edge(INVALID);
 		            bool dir;
+		            {
 		              graph.first(edge);
 		              graph.next(edge);
+		            }
+		            {
 		              graph.firstInc(edge, dir, node);
 		              graph.nextInc(edge, dir);
+		            }
+		          }
+		          {
 		            checkConcept<GraphItemIt<_Graph, typename _Graph::Edge>,
 		              typename _Graph::EdgeIt >();
 		            checkConcept<GraphIncIt<_Graph, typename _Graph::Edge,
 		              typename _Graph::Node, 'u'>, typename _Graph::IncEdgeIt>();
 		            typename _Graph::Node n;
 		            typename _Graph::IncEdgeIt ueit(INVALID);
 		            n = graph.baseNode(ueit);
 		            n = graph.runningNode(ueit);
+		          }
+		        }
 		        const _Graph& graph;
 		      };
 		    };
 		    /// \brief An empty alteration notifier digraph class.
 		    ///
 		    /// This class provides beside the core digraph features alteration
 		    /// notifier interface for the digraph structure.  This implements
 		    /// an observer-notifier pattern for each digraph item. More
 		    /// obsevers can be registered into the notifier and whenever an
 		    /// alteration occured in the digraph all the observers will
 		    /// notified about it.
 		    template <typename _Base = BaseDigraphComponent>
 		    class AlterableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      /// The node observer registry.
 		      typedef AlterationNotifier<AlterableDigraphComponent, Node>
 		      NodeNotifier;
 		      /// The arc observer registry.
 		      typedef AlterationNotifier<AlterableDigraphComponent, Arc>
 		      ArcNotifier;
 		      /// \brief Gives back the node alteration notifier.
 		      ///
 		      /// Gives back the node alteration notifier.
 		      NodeNotifier& notifier(Node) const {
 		        return NodeNotifier();
+		      }
 		      /// \brief Gives back the arc alteration notifier.
 		      ///
 		      /// Gives back the arc alteration notifier.
 		      ArcNotifier& notifier(Arc) const {
 		        return ArcNotifier();
+		      }
 		      template <typename _Digraph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Digraph>();
 		          typename _Digraph::NodeNotifier& nn
 		            = digraph.notifier(typename _Digraph::Node());
 		          typename _Digraph::ArcNotifier& en
 		            = digraph.notifier(typename _Digraph::Arc());
 		          ignore_unused_variable_warning(nn);
 		          ignore_unused_variable_warning(en);
+		        }
 		        const _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty alteration notifier undirected graph class.
 		    ///
 		    /// This class provides beside the core graph features alteration
 		    /// notifier interface for the graph structure.  This implements
 		    /// an observer-notifier pattern for each graph item. More
 		    /// obsevers can be registered into the notifier and whenever an
 		    /// alteration occured in the graph all the observers will
 		    /// notified about it.
 		    template <typename _Base = BaseGraphComponent>
 		    class AlterableGraphComponent : public AlterableDigraphComponent<_Base> {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Edge Edge;
 		      /// The arc observer registry.
 		      typedef AlterationNotifier<AlterableGraphComponent, Edge>
 		      EdgeNotifier;
 		      /// \brief Gives back the arc alteration notifier.
 		      ///
 		      /// Gives back the arc alteration notifier.
 		      EdgeNotifier& notifier(Edge) const {
 		        return EdgeNotifier();
+		      }
 		      template <typename _Graph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<AlterableGraphComponent<Base>, _Graph>();
 		          typename _Graph::EdgeNotifier& uen
 		            = graph.notifier(typename _Graph::Edge());
 		          ignore_unused_variable_warning(uen);
+		        }
 		        const _Graph& graph;
 		      };
 		    };
 		    /// \brief Class describing the concept of graph maps
 		    ///
 		    /// This class describes the common interface of the graph maps
 		    /// (NodeMap, ArcMap), that is \ref maps-page "maps" which can be used to
 		    /// associate data to graph descriptors (nodes or arcs).
 		    template <typename _Graph, typename _Item, typename _Value>
 		    class GraphMap : public ReadWriteMap<_Item, _Value> {
 		    public:
 		      typedef ReadWriteMap<_Item, _Value> Parent;
 		      /// The graph type of the map.
 		      typedef _Graph Graph;
 		      /// The key type of the map.
 		      typedef _Item Key;
 		      /// The value type of the map.
 		      typedef _Value Value;
 		      /// \brief Construct a new map.
 		      ///
 		      /// Construct a new map for the graph.
 		      explicit GraphMap(const Graph&) {}
 		      /// \brief Construct a new map with default value.
 		      ///
 		      /// Construct a new map for the graph and initalise the values.
 		      GraphMap(const Graph&, const Value&) {}
 		      /// \brief Copy constructor.
 		      ///
 		      /// Copy Constructor.
 		      GraphMap(const GraphMap&) : Parent() {}
 		      /// \brief Assign operator.
 		      ///
 		      /// Assign operator. It does not mofify the underlying graph,
 		      /// it just iterates on the current item set and set the  map
 		      /// with the value returned by the assigned map.
 		      template <typename CMap>
 		      GraphMap& operator=(const CMap&) {
 		        checkConcept<ReadMap<Key, Value>, CMap>();
 		        return *this;
+		      }
 		      template<typename _Map>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<ReadWriteMap<Key, Value>, _Map >();
 		          // Construction with a graph parameter
 		          _Map a(g);
 		          // Constructor with a graph and a default value parameter
 		          _Map a2(g,t);
 		          // Copy constructor.
 		          _Map b(c);
 		          ReadMap<Key, Value> cmap;
 		          b = cmap;
 		          ignore_unused_variable_warning(a2);
 		          ignore_unused_variable_warning(b);
+		        }
 		        const _Map &c;
 		        const Graph &g;
 		        const typename GraphMap::Value &t;
 		      };
 		    };
 		    /// \brief An empty mappable digraph class.
 		    ///
 		    /// This class provides beside the core digraph features
 		    /// map interface for the digraph structure.
 		    /// This concept is part of the Digraph concept.
 		    template <typename _Base = BaseDigraphComponent>
 		    class MappableDigraphComponent : public _Base  {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      typedef MappableDigraphComponent Digraph;
 		      /// \brief ReadWrite map of the nodes.
 		      ///
 		      /// ReadWrite map of the nodes.
 		      ///
 		      template <typename _Value>
 		      class NodeMap : public GraphMap<Digraph, Node, _Value> {
 		      public:
 		        typedef GraphMap<MappableDigraphComponent, Node, _Value> Parent;
 		        /// \brief Construct a new map.
 		        ///
 		        /// Construct a new map for the digraph.
 		        explicit NodeMap(const MappableDigraphComponent& digraph)
 		          : Parent(digraph) {}
 		        /// \brief Construct a new map with default value.
 		        ///
 		        /// Construct a new map for the digraph and initalise the values.
 		        NodeMap(const MappableDigraphComponent& digraph, const _Value& value)
 		          : Parent(digraph, value) {}
 		        /// \brief Copy constructor.
 		        ///
 		        /// Copy Constructor.
 		        NodeMap(const NodeMap& nm) : Parent(nm) {}
 		        /// \brief Assign operator.
 		        ///
 		        /// Assign operator.
 		        template <typename CMap>
 		        NodeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Node, _Value>, CMap>();
 		          return *this;
+		        }
 		      };
 		      /// \brief ReadWrite map of the arcs.
 		      ///
 		      /// ReadWrite map of the arcs.
 		      ///
 		      template <typename _Value>
 		      class ArcMap : public GraphMap<Digraph, Arc, _Value> {
 		      public:
 		        typedef GraphMap<MappableDigraphComponent, Arc, _Value> Parent;
 		        /// \brief Construct a new map.
 		        ///
 		        /// Construct a new map for the digraph.
 		        explicit ArcMap(const MappableDigraphComponent& digraph)
 		          : Parent(digraph) {}
 		        /// \brief Construct a new map with default value.
 		        ///
 		        /// Construct a new map for the digraph and initalise the values.
 		        ArcMap(const MappableDigraphComponent& digraph, const _Value& value)
 		          : Parent(digraph, value) {}
 		        /// \brief Copy constructor.
 		        ///
 		        /// Copy Constructor.
 		        ArcMap(const ArcMap& nm) : Parent(nm) {}
 		        /// \brief Assign operator.
 		        ///
 		        /// Assign operator.
 		        template <typename CMap>
 		        ArcMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Arc, _Value>, CMap>();
 		          return *this;
+		        }
 		      };
 		      template <typename _Digraph>
 		      struct Constraints {
 		        struct Dummy {
 		          int value;
 		          Dummy() : value(0) {}
 		          Dummy(int _v) : value(_v) {}
 		        };
 		        void constraints() {
 		          checkConcept<Base, _Digraph>();
 		          { // int map test
 		            typedef typename _Digraph::template NodeMap<int> IntNodeMap;
 		            checkConcept<GraphMap<_Digraph, typename _Digraph::Node, int>,
 		              IntNodeMap >();
 		          } { // bool map test
 		            typedef typename _Digraph::template NodeMap<bool> BoolNodeMap;
 		            checkConcept<GraphMap<_Digraph, typename _Digraph::Node, bool>,
 		              BoolNodeMap >();
 		          } { // Dummy map test
 		            typedef typename _Digraph::template NodeMap<Dummy> DummyNodeMap;
 		            checkConcept<GraphMap<_Digraph, typename _Digraph::Node, Dummy>,
 		              DummyNodeMap >();
+		          }
 		          { // int map test
 		            typedef typename _Digraph::template ArcMap<int> IntArcMap;
 		            checkConcept<GraphMap<_Digraph, typename _Digraph::Arc, int>,
 		              IntArcMap >();
 		          } { // bool map test
 		            typedef typename _Digraph::template ArcMap<bool> BoolArcMap;
 		            checkConcept<GraphMap<_Digraph, typename _Digraph::Arc, bool>,
 		              BoolArcMap >();
 		          } { // Dummy map test
 		            typedef typename _Digraph::template ArcMap<Dummy> DummyArcMap;
 		            checkConcept<GraphMap<_Digraph, typename _Digraph::Arc, Dummy>,
 		              DummyArcMap >();
+		          }
+		        }
 		        _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty mappable base bipartite graph class.
 		    ///
 		    /// This class provides beside the core graph features
 		    /// map interface for the graph structure.
 		    /// This concept is part of the Graph concept.
 		    template <typename _Base = BaseGraphComponent>
 		    class MappableGraphComponent : public MappableDigraphComponent<_Base>  {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Edge Edge;
 		      typedef MappableGraphComponent Graph;
 		      /// \brief ReadWrite map of the edges.
 		      ///
 		      /// ReadWrite map of the edges.
 		      ///
 		      template <typename _Value>
 		      class EdgeMap : public GraphMap<Graph, Edge, _Value> {
 		      public:
 		        typedef GraphMap<MappableGraphComponent, Edge, _Value> Parent;
 		        /// \brief Construct a new map.
 		        ///
 		        /// Construct a new map for the graph.
 		        explicit EdgeMap(const MappableGraphComponent& graph)
 		          : Parent(graph) {}
 		        /// \brief Construct a new map with default value.
 		        ///
 		        /// Construct a new map for the graph and initalise the values.
 		        EdgeMap(const MappableGraphComponent& graph, const _Value& value)
 		          : Parent(graph, value) {}
 		        /// \brief Copy constructor.
 		        ///
 		        /// Copy Constructor.
 		        EdgeMap(const EdgeMap& nm) : Parent(nm) {}
 		        /// \brief Assign operator.
 		        ///
 		        /// Assign operator.
 		        template <typename CMap>
 		        EdgeMap& operator=(const CMap&) {
 		          checkConcept<ReadMap<Edge, _Value>, CMap>();
 		          return *this;
+		        }
 		      };
 		      template <typename _Graph>
 		      struct Constraints {
 		        struct Dummy {
 		          int value;
 		          Dummy() : value(0) {}
 		          Dummy(int _v) : value(_v) {}
 		        };
 		        void constraints() {
 		          checkConcept<MappableGraphComponent<Base>, _Graph>();
 		          { // int map test
 		            typedef typename _Graph::template EdgeMap<int> IntEdgeMap;
 		            checkConcept<GraphMap<_Graph, typename _Graph::Edge, int>,
 		              IntEdgeMap >();
 		          } { // bool map test
 		            typedef typename _Graph::template EdgeMap<bool> BoolEdgeMap;
 		            checkConcept<GraphMap<_Graph, typename _Graph::Edge, bool>,
 		              BoolEdgeMap >();
 		          } { // Dummy map test
 		            typedef typename _Graph::template EdgeMap<Dummy> DummyEdgeMap;
 		            checkConcept<GraphMap<_Graph, typename _Graph::Edge, Dummy>,
 		              DummyEdgeMap >();
+		          }
+		        }
 		        _Graph& graph;
 		      };
 		    };
 		    /// \brief An empty extendable digraph class.
 		    ///
 		    /// This class provides beside the core digraph features digraph
 		    /// extendable interface for the digraph structure.  The main
 		    /// difference between the base and this interface is that the
 		    /// digraph alterations should handled already on this level.
 		    template <typename _Base = BaseDigraphComponent>
 		    class ExtendableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename _Base::Node Node;
 		      typedef typename _Base::Arc Arc;
 		      /// \brief Adds a new node to the digraph.
 		      ///
 		      /// Adds a new node to the digraph.
 		      ///
 		      Node addNode() {
 		        return INVALID;
+		      }
 		      /// \brief Adds a new arc connects the given two nodes.
 		      ///
 		      /// Adds a new arc connects the the given two nodes.
 		      Arc addArc(const Node&, const Node&) {
 		        return INVALID;
+		      }
 		      template <typename _Digraph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Digraph>();
 		          typename _Digraph::Node node_a, node_b;
 		          node_a = digraph.addNode();
 		          node_b = digraph.addNode();
 		          typename _Digraph::Arc arc;
 		          arc = digraph.addArc(node_a, node_b);
+		        }
 		        _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty extendable base undirected graph class.
 		    ///
 		    /// This class provides beside the core undirected graph features
 		    /// core undircted graph extend interface for the graph structure.
 		    /// The main difference between the base and this interface is
 		    /// that the graph alterations should handled already on this
 		    /// level.
 		    template <typename _Base = BaseGraphComponent>
 		    class ExtendableGraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename _Base::Node Node;
 		      typedef typename _Base::Edge Edge;
 		      /// \brief Adds a new node to the graph.
 		      ///
 		      /// Adds a new node to the graph.
 		      ///
 		      Node addNode() {
 		        return INVALID;
+		      }
 		      /// \brief Adds a new arc connects the given two nodes.
 		      ///
 		      /// Adds a new arc connects the the given two nodes.
 		      Edge addArc(const Node&, const Node&) {
 		        return INVALID;
+		      }
 		      template <typename _Graph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Graph>();
 		          typename _Graph::Node node_a, node_b;
 		          node_a = graph.addNode();
 		          node_b = graph.addNode();
 		          typename _Graph::Edge edge;
 		          edge = graph.addEdge(node_a, node_b);
+		        }
 		        _Graph& graph;
 		      };
 		    };
 		    /// \brief An empty erasable digraph class.
 		    ///
 		    /// This class provides beside the core digraph features core erase
 		    /// functions for the digraph structure. The main difference between
 		    /// the base and this interface is that the digraph alterations
 		    /// should handled already on this level.
 		    template <typename _Base = BaseDigraphComponent>
 		    class ErasableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Arc Arc;
 		      /// \brief Erase a node from the digraph.
 		      ///
 		      /// Erase a node from the digraph. This function should
 		      /// erase all arcs connecting to the node.
 		      void erase(const Node&) {}
 		      /// \brief Erase an arc from the digraph.
 		      ///
 		      /// Erase an arc from the digraph.
 		      ///
 		      void erase(const Arc&) {}
 		      template <typename _Digraph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Digraph>();
 		          typename _Digraph::Node node;
 		          digraph.erase(node);
 		          typename _Digraph::Arc arc;
 		          digraph.erase(arc);
+		        }
 		        _Digraph& digraph;
 		      };
 		    };
 		    /// \brief An empty erasable base undirected graph class.
 		    ///
 		    /// This class provides beside the core undirected graph features
 		    /// core erase functions for the undirceted graph structure. The
 		    /// main difference between the base and this interface is that
 		    /// the graph alterations should handled already on this level.
 		    template <typename _Base = BaseGraphComponent>
 		    class ErasableGraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      typedef typename Base::Node Node;
 		      typedef typename Base::Edge Edge;
 		      /// \brief Erase a node from the graph.
 		      ///
 		      /// Erase a node from the graph. This function should erase
 		      /// arcs connecting to the node.
 		      void erase(const Node&) {}
 		      /// \brief Erase an arc from the graph.
 		      ///
 		      /// Erase an arc from the graph.
 		      ///
 		      void erase(const Edge&) {}
 		      template <typename _Graph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Graph>();
 		          typename _Graph::Node node;
 		          graph.erase(node);
 		          typename _Graph::Edge edge;
 		          graph.erase(edge);
+		        }
 		        _Graph& graph;
 		      };
 		    };
 		    /// \brief An empty clearable base digraph class.
 		    ///
 		    /// This class provides beside the core digraph features core clear
 		    /// functions for the digraph structure. The main difference between
 		    /// the base and this interface is that the digraph alterations
 		    /// should handled already on this level.
 		    template <typename _Base = BaseDigraphComponent>
 		    class ClearableDigraphComponent : public _Base {
 		    public:
 		      typedef _Base Base;
 		      /// \brief Erase all nodes and arcs from the digraph.
 		      ///
 		      /// Erase all nodes and arcs from the digraph.
 		      ///
 		      void clear() {}
 		      template <typename _Digraph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<Base, _Digraph>();
 		          digraph.clear();
+		        }
 		        _Digraph digraph;
 		      };
 		    };
 		    /// \brief An empty clearable base undirected graph class.
 		    ///
 		    /// This class provides beside the core undirected graph features
 		    /// core clear functions for the undirected graph structure. The
 		    /// main difference between the base and this interface is that
 		    /// the graph alterations should handled already on this level.
 		    template <typename _Base = BaseGraphComponent>
 		    class ClearableGraphComponent : public ClearableDigraphComponent<_Base> {
 		    public:
 		      typedef _Base Base;
 		      template <typename _Graph>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<ClearableGraphComponent<Base>, _Graph>();
+		        }
 		        _Graph graph;
 		      };
 		    };
+		  }
+		}
 		#endif

lemon/concepts/heap.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup concept
 		///\file
 		///\brief The concept of heaps.
 		#ifndef LEMON_CONCEPT_HEAP_H
 		#define LEMON_CONCEPT_HEAP_H
-		#include <lemon/bits/invalid.h>
+		#include <lemon/core.h>
 		namespace lemon {
 		  namespace concepts {
 		    /// \addtogroup concept
 		    /// @{
 		    /// \brief The heap concept.
 		    ///
 		    /// Concept class describing the main interface of heaps.
 		    template <typename Priority, typename ItemIntMap>
 		    class Heap {
 		    public:
 		      /// Type of the items stored in the heap.
 		      typedef typename ItemIntMap::Key Item;
 		      /// Type of the priorities.
 		      typedef Priority Prio;
 		      /// \brief Type to represent the states of the items.
 		      ///
 		      /// Each item has a state associated to it. It can be "in heap",
 		      /// "pre heap" or "post heap". The later two are indifferent
 		      /// from the point of view of the heap, but may be useful for
 		      /// the user.
 		      ///
 		      /// The \c ItemIntMap must be initialized in such a way, that it
 		      /// assigns \c PRE_HEAP (<tt>-1</tt>) to every item.
 		      enum State {
 		        IN_HEAP = 0,
 		        PRE_HEAP = -1,
 		        POST_HEAP = -2
 		      };
 		      /// \brief The constructor.
 		      ///
 		      /// The constructor.
 		      /// \param map A map that assigns \c int values to keys of type
 		      /// \c Item. It is used internally by the heap implementations to
 		      /// handle the cross references. The assigned value must be
 		      /// \c PRE_HEAP (<tt>-1</tt>) for every item.
 		      explicit Heap(ItemIntMap &map) {}
 		      /// \brief The number of items stored in the heap.
 		      ///
 		      /// Returns the number of items stored in the heap.
 		      int size() const { return 0; }
 		      /// \brief Checks if the heap is empty.
 		      ///
 		      /// Returns \c true if the heap is empty.
 		      bool empty() const { return false; }
 		      /// \brief Makes the heap empty.
 		      ///
 		      /// Makes the heap empty.
 		      void clear();
 		      /// \brief Inserts an item into the heap with the given priority.
 		      ///
 		      /// Inserts the given item into the heap with the given priority.
 		      /// \param i The item to insert.
 		      /// \param p The priority of the item.
 		      void push(const Item &i, const Prio &p) {}
 		      /// \brief Returns the item having minimum priority.
 		      ///
 		      /// Returns the item having minimum priority.
 		      /// \pre The heap must be non-empty.
 		      Item top() const {}
 		      /// \brief The minimum priority.
 		      ///
 		      /// Returns the minimum priority.
 		      /// \pre The heap must be non-empty.
 		      Prio prio() const {}
 		      /// \brief Removes the item having minimum priority.
 		      ///
 		      /// Removes the item having minimum priority.
 		      /// \pre The heap must be non-empty.
 		      void pop() {}
 		      /// \brief Removes an item from the heap.
 		      ///
 		      /// Removes the given item from the heap if it is already stored.
 		      /// \param i The item to delete.
 		      void erase(const Item &i) {}
 		      /// \brief The priority of an item.
 		      ///
 		      /// Returns the priority of the given item.
 		      /// \pre \c i must be in the heap.
 		      /// \param i The item.
 		      Prio operator[](const Item &i) const {}
 		      /// \brief Sets the priority of an item or inserts it, if it is
 		      /// not stored in the heap.
 		      ///
 		      /// This method sets the priority of the given item if it is
 		      /// already stored in the heap.
 		      /// Otherwise it inserts the given item with the given priority.
 		      ///
 		      /// It may throw an \ref UnderflowPriorityException.
 		      /// \param i The item.
 		      /// \param p The priority.
 		      void set(const Item &i, const Prio &p) {}
 		      /// \brief Decreases the priority of an item to the given value.
 		      ///
 		      /// Decreases the priority of an item to the given value.
 		      /// \pre \c i must be stored in the heap with priority at least \c p.
 		      /// \param i The item.
 		      /// \param p The priority.
 		      void decrease(const Item &i, const Prio &p) {}
 		      /// \brief Increases the priority of an item to the given value.
 		      ///
 		      /// Increases the priority of an item to the given value.
 		      /// \pre \c i must be stored in the heap with priority at most \c p.
 		      /// \param i The item.
 		      /// \param p The priority.
 		      void increase(const Item &i, const Prio &p) {}
 		      /// \brief Returns if an item is in, has already been in, or has
 		      /// never been in the heap.
 		      ///
 		      /// This method returns \c PRE_HEAP if the given item has never
 		      /// been in the heap, \c IN_HEAP if it is in the heap at the moment,
 		      /// and \c POST_HEAP otherwise.
 		      /// In the latter case it is possible that the item will get back
 		      /// to the heap again.
 		      /// \param i The item.
 		      State state(const Item &i) const {}
 		      /// \brief Sets the state of an item in the heap.
 		      ///
 		      /// Sets the state of the given item in the heap. It can be used
 		      /// to manually clear the heap when it is important to achive the
 		      /// better time complexity.
 		      /// \param i The item.
 		      /// \param st The state. It should not be \c IN_HEAP.
 		      void state(const Item& i, State st) {}
 		      template <typename _Heap>
 		      struct Constraints {
 		      public:
 		        void constraints() {
 		          typedef typename _Heap::Item OwnItem;
 		          typedef typename _Heap::Prio OwnPrio;
 		          typedef typename _Heap::State OwnState;
 		          Item item;
 		          Prio prio;
 		          item=Item();
 		          prio=Prio();
 		          ignore_unused_variable_warning(item);
 		          ignore_unused_variable_warning(prio);
 		          OwnItem own_item;
 		          OwnPrio own_prio;
 		          OwnState own_state;
 		          own_item=Item();
 		          own_prio=Prio();
 		          ignore_unused_variable_warning(own_item);
 		          ignore_unused_variable_warning(own_prio);
 		          ignore_unused_variable_warning(own_state);
 		          _Heap heap1(map);
 		          _Heap heap2 = heap1;
 		          ignore_unused_variable_warning(heap1);
 		          ignore_unused_variable_warning(heap2);
 		          int s = heap.size();
 		          ignore_unused_variable_warning(s);
 		          bool e = heap.empty();
 		          ignore_unused_variable_warning(e);
 		          prio = heap.prio();
 		          item = heap.top();
 		          prio = heap[item];
 		          own_prio = heap.prio();
 		          own_item = heap.top();
 		          own_prio = heap[own_item];
 		          heap.push(item, prio);
 		          heap.push(own_item, own_prio);
 		          heap.pop();
 		          heap.set(item, prio);
 		          heap.decrease(item, prio);
 		          heap.increase(item, prio);
 		          heap.set(own_item, own_prio);
 		          heap.decrease(own_item, own_prio);
 		          heap.increase(own_item, own_prio);
 		          heap.erase(item);
 		          heap.erase(own_item);
 		          heap.clear();
 		          own_state = heap.state(own_item);
 		          heap.state(own_item, own_state);
 		          own_state = _Heap::PRE_HEAP;
 		          own_state = _Heap::IN_HEAP;
 		          own_state = _Heap::POST_HEAP;
+		        }
 		        _Heap& heap;
 		        ItemIntMap& map;
 		      };
 		    };
 		    /// @}
 		  } // namespace lemon
+		}
 		#endif // LEMON_CONCEPT_PATH_H

lemon/concepts/maps.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_CONCEPT_MAPS_H
 		#define LEMON_CONCEPT_MAPS_H
-		#include <lemon/bits/utility.h>
+		#include <lemon/core.h>
 		#include <lemon/concept_check.h>
 		///\ingroup concept
 		///\file
 		///\brief The concept of maps.
 		namespace lemon {
 		  namespace concepts {
 		    /// \addtogroup concept
 		    /// @{
 		    /// Readable map concept
 		    /// Readable map concept.
 		    ///
 		    template<typename K, typename T>
 		    class ReadMap
+		    {
 		    public:
 		      /// The key type of the map.
 		      typedef K Key;
 		      /// \brief The value type of the map.
 		      /// (The type of objects associated with the keys).
 		      typedef T Value;
 		      /// Returns the value associated with the given key.
 		      Value operator[](const Key &) const {
 		        return *static_cast<Value *>(0);
+		      }
 		      template<typename _ReadMap>
 		      struct Constraints {
 		        void constraints() {
 		          Value val = m[key];
 		          val = m[key];
 		          typename _ReadMap::Value own_val = m[own_key];
 		          own_val = m[own_key];
 		          ignore_unused_variable_warning(key);
 		          ignore_unused_variable_warning(val);
 		          ignore_unused_variable_warning(own_key);
 		          ignore_unused_variable_warning(own_val);
+		        }
 		        const Key& key;
 		        const typename _ReadMap::Key& own_key;
 		        const _ReadMap& m;
 		      };
 		    };
 		    /// Writable map concept
 		    /// Writable map concept.
 		    ///
 		    template<typename K, typename T>
 		    class WriteMap
+		    {
 		    public:
 		      /// The key type of the map.
 		      typedef K Key;
 		      /// \brief The value type of the map.
 		      /// (The type of objects associated with the keys).
 		      typedef T Value;
 		      /// Sets the value associated with the given key.
 		      void set(const Key &, const Value &) {}
 		      /// Default constructor.
 		      WriteMap() {}
 		      template <typename _WriteMap>
 		      struct Constraints {
 		        void constraints() {
 		          m.set(key, val);
 		          m.set(own_key, own_val);
 		          ignore_unused_variable_warning(key);
 		          ignore_unused_variable_warning(val);
 		          ignore_unused_variable_warning(own_key);
 		          ignore_unused_variable_warning(own_val);
+		        }
 		        const Key& key;
 		        const Value& val;
 		        const typename _WriteMap::Key& own_key;
 		        const typename _WriteMap::Value& own_val;
 		        _WriteMap& m;
 		      };
 		    };
 		    /// Read/writable map concept
 		    /// Read/writable map concept.
 		    ///
 		    template<typename K, typename T>
 		    class ReadWriteMap : public ReadMap<K,T>,
 		                         public WriteMap<K,T>
+		    {
 		    public:
 		      /// The key type of the map.
 		      typedef K Key;
 		      /// \brief The value type of the map.
 		      /// (The type of objects associated with the keys).
 		      typedef T Value;
 		      /// Returns the value associated with the given key.
 		      Value operator[](const Key &) const {
 		        return *static_cast<Value *>(0);
+		      }
 		      /// Sets the value associated with the given key.
 		      void set(const Key &, const Value &) {}
 		      template<typename _ReadWriteMap>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<ReadMap<K, T>, _ReadWriteMap >();
 		          checkConcept<WriteMap<K, T>, _ReadWriteMap >();
+		        }
 		      };
 		    };
 		    /// Dereferable map concept
 		    /// Dereferable map concept.
 		    ///
 		    template<typename K, typename T, typename R, typename CR>
 		    class ReferenceMap : public ReadWriteMap<K,T>
+		    {
 		    public:
 		      /// Tag for reference maps.
 		      typedef True ReferenceMapTag;
 		      /// The key type of the map.
 		      typedef K Key;
 		      /// \brief The value type of the map.
 		      /// (The type of objects associated with the keys).
 		      typedef T Value;
 		      /// The reference type of the map.
 		      typedef R Reference;
 		      /// The const reference type of the map.
 		      typedef CR ConstReference;
 		    public:
 		      /// Returns a reference to the value associated with the given key.
 		      Reference operator[](const Key &) {
 		        return *static_cast<Value *>(0);
+		      }
 		      /// Returns a const reference to the value associated with the given key.
 		      ConstReference operator[](const Key &) const {
 		        return *static_cast<Value *>(0);
+		      }
 		      /// Sets the value associated with the given key.
 		      void set(const Key &k,const Value &t) { operator[](k)=t; }
 		      template<typename _ReferenceMap>
 		      struct Constraints {
 		        void constraints() {
 		          checkConcept<ReadWriteMap<K, T>, _ReferenceMap >();
 		          ref = m[key];
 		          m[key] = val;
 		          m[key] = ref;
 		          m[key] = cref;
 		          own_ref = m[own_key];
 		          m[own_key] = own_val;
 		          m[own_key] = own_ref;
 		          m[own_key] = own_cref;
 		          m[key] = m[own_key];
 		          m[own_key] = m[key];
+		        }
 		        const Key& key;
 		        Value& val;
 		        Reference ref;
 		        ConstReference cref;
 		        const typename _ReferenceMap::Key& own_key;
 		        typename _ReferenceMap::Value& own_val;
 		        typename _ReferenceMap::Reference own_ref;
 		        typename _ReferenceMap::ConstReference own_cref;
 		        _ReferenceMap& m;
 		      };
 		    };
 		    // @}
 		  } //namespace concepts
 		} //namespace lemon
 		#endif // LEMON_CONCEPT_MAPS_H

lemon/concepts/path.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		///\ingroup concept
 		///\file
 		///\brief Classes for representing paths in digraphs.
 		///
 		///\todo Iterators have obsolete style
 		#ifndef LEMON_CONCEPT_PATH_H
 		#define LEMON_CONCEPT_PATH_H
 		#include <lemon/bits/invalid.h>
 		#include <lemon/bits/utility.h>
 		#include <lemon/core.h>
 		#include <lemon/concept_check.h>
 		namespace lemon {
 		  namespace concepts {
 		    /// \addtogroup concept
 		    /// @{
 		    /// \brief A skeleton structure for representing directed paths in
 		    /// a digraph.
 		    ///
 		    /// A skeleton structure for representing directed paths in a
 		    /// digraph.
 		    /// \tparam _Digraph The digraph type in which the path is.
 		    ///
 		    /// In a sense, the path can be treated as a list of arcs. The
 		    /// lemon path type stores just this list. As a consequence it
 		    /// cannot enumerate the nodes in the path and the zero length
 		    /// paths cannot store the source.
 		    ///
 		    template <typename _Digraph>
 		    class Path {
 		    public:
 		      /// Type of the underlying digraph.
 		      typedef _Digraph Digraph;
 		      /// Arc type of the underlying digraph.
 		      typedef typename Digraph::Arc Arc;
 		      class ArcIt;
 		      /// \brief Default constructor
 		      Path() {}
 		      /// \brief Template constructor
 		      template <typename CPath>
 		      Path(const CPath& cpath) {}
 		      /// \brief Template assigment
 		      template <typename CPath>
 		      Path& operator=(const CPath& cpath) {}
 		      /// Length of the path ie. the number of arcs in the path.
 		      int length() const { return 0;}
 		      /// Returns whether the path is empty.
 		      bool empty() const { return true;}
 		      /// Resets the path to an empty path.
 		      void clear() {}
 		      /// \brief Lemon style iterator for path arcs
 		      ///
 		      /// This class is used to iterate on the arcs of the paths.
 		      class ArcIt {
 		      public:
 		        /// Default constructor
 		        ArcIt() {}
 		        /// Invalid constructor
 		        ArcIt(Invalid) {}
 		        /// Constructor for first arc
 		        ArcIt(const Path &) {}
 		        /// Conversion to Arc
 		        operator Arc() const { return INVALID; }
 		        /// Next arc
 		        ArcIt& operator++() {return *this;}
 		        /// Comparison operator
 		        bool operator==(const ArcIt&) const {return true;}
 		        /// Comparison operator
 		        bool operator!=(const ArcIt&) const {return true;}
 		        /// Comparison operator
 		        bool operator<(const ArcIt&) const {return false;}
 		      };
 		      template <typename _Path>
 		      struct Constraints {
 		        void constraints() {
 		          Path<Digraph> pc;
 		          _Path p, pp(pc);
 		          int l = p.length();
 		          int e = p.empty();
 		          p.clear();
 		          p = pc;
 		          typename _Path::ArcIt id, ii(INVALID), i(p);
 		          ++i;
 		          typename Digraph::Arc ed = i;
 		          e = (i == ii);
 		          e = (i != ii);
 		          e = (i < ii);
 		          ignore_unused_variable_warning(l);
 		          ignore_unused_variable_warning(pp);
 		          ignore_unused_variable_warning(e);
 		          ignore_unused_variable_warning(id);
 		          ignore_unused_variable_warning(ii);
 		          ignore_unused_variable_warning(ed);
+		        }
 		      };
 		    };
 		    namespace _path_bits {
 		      template <typename _Digraph, typename _Path, typename RevPathTag = void>
 		      struct PathDumperConstraints {
 		        void constraints() {
 		          int l = p.length();
 		          int e = p.empty();
 		          typename _Path::ArcIt id, i(p);
 		          ++i;
 		          typename _Digraph::Arc ed = i;
 		          e = (i == INVALID);
 		          e = (i != INVALID);
 		          ignore_unused_variable_warning(l);
 		          ignore_unused_variable_warning(e);
 		          ignore_unused_variable_warning(id);
 		          ignore_unused_variable_warning(ed);
+		        }
 		        _Path& p;
 		      };
 		      template <typename _Digraph, typename _Path>
 		      struct PathDumperConstraints<
 		        _Digraph, _Path,
 		        typename enable_if<typename _Path::RevPathTag, void>::type
 		      > {
 		        void constraints() {
 		          int l = p.length();
 		          int e = p.empty();
 		          typename _Path::RevArcIt id, i(p);
 		          ++i;
 		          typename _Digraph::Arc ed = i;
 		          e = (i == INVALID);
 		          e = (i != INVALID);
 		          ignore_unused_variable_warning(l);
 		          ignore_unused_variable_warning(e);
 		          ignore_unused_variable_warning(id);
 		          ignore_unused_variable_warning(ed);
+		        }
 		        _Path& p;
 		      };
+		    }
 		    /// \brief A skeleton structure for path dumpers.
 		    ///
 		    /// A skeleton structure for path dumpers. The path dumpers are
 		    /// the generalization of the paths. The path dumpers can
 		    /// enumerate the arcs of the path wheter in forward or in
 		    /// backward order.  In most time these classes are not used
 		    /// directly rather it used to assign a dumped class to a real
 		    /// path type.
 		    ///
 		    /// The main purpose of this concept is that the shortest path
 		    /// algorithms can enumerate easily the arcs in reverse order.
 		    /// If we would like to give back a real path from these
 		    /// algorithms then we should create a temporarly path object. In
 		    /// Lemon such algorithms gives back a path dumper what can
 		    /// assigned to a real path and the dumpers can be implemented as
 		    /// an adaptor class to the predecessor map.
 		    /// \tparam _Digraph  The digraph type in which the path is.
 		    ///
 		    /// The paths can be constructed from any path type by a
 		    /// template constructor or a template assignment operator.
 		    ///
 		    template <typename _Digraph>
 		    class PathDumper {
 		    public:
 		      /// Type of the underlying digraph.
 		      typedef _Digraph Digraph;
 		      /// Arc type of the underlying digraph.
 		      typedef typename Digraph::Arc Arc;
 		      /// Length of the path ie. the number of arcs in the path.
 		      int length() const { return 0;}
 		      /// Returns whether the path is empty.
 		      bool empty() const { return true;}
 		      /// \brief Forward or reverse dumping
 		      ///
 		      /// If the RevPathTag is defined and true then reverse dumping
 		      /// is provided in the path dumper. In this case instead of the
 		      /// ArcIt the RevArcIt iterator should be implemented in the
 		      /// dumper.
 		      typedef False RevPathTag;
 		      /// \brief Lemon style iterator for path arcs
 		      ///
 		      /// This class is used to iterate on the arcs of the paths.
 		      class ArcIt {
 		      public:
 		        /// Default constructor
 		        ArcIt() {}
 		        /// Invalid constructor
 		        ArcIt(Invalid) {}
 		        /// Constructor for first arc
 		        ArcIt(const PathDumper&) {}
 		        /// Conversion to Arc
 		        operator Arc() const { return INVALID; }
 		        /// Next arc
 		        ArcIt& operator++() {return *this;}
 		        /// Comparison operator
 		        bool operator==(const ArcIt&) const {return true;}
 		        /// Comparison operator
 		        bool operator!=(const ArcIt&) const {return true;}
 		        /// Comparison operator
 		        bool operator<(const ArcIt&) const {return false;}
 		      };
 		      /// \brief Lemon style iterator for path arcs
 		      ///
 		      /// This class is used to iterate on the arcs of the paths in
 		      /// reverse direction.
 		      class RevArcIt {
 		      public:
 		        /// Default constructor
 		        RevArcIt() {}
 		        /// Invalid constructor
 		        RevArcIt(Invalid) {}
 		        /// Constructor for first arc
 		        RevArcIt(const PathDumper &) {}
 		        /// Conversion to Arc
 		        operator Arc() const { return INVALID; }
 		        /// Next arc
 		        RevArcIt& operator++() {return *this;}
 		        /// Comparison operator
 		        bool operator==(const RevArcIt&) const {return true;}
 		        /// Comparison operator
 		        bool operator!=(const RevArcIt&) const {return true;}
 		        /// Comparison operator
 		        bool operator<(const RevArcIt&) const {return false;}
 		      };
 		      template <typename _Path>
 		      struct Constraints {
 		        void constraints() {
 		          function_requires<_path_bits::
 		            PathDumperConstraints<Digraph, _Path> >();
+		        }
 		      };
 		    };
 		    ///@}
+		  }
 		} // namespace lemon
 		#endif // LEMON_CONCEPT_PATH_H

lemon/bits/invalid.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_BITS_INVALID_H
 		#define LEMON_BITS_INVALID_H
 		///\file
 		///\brief Definition of INVALID.
 		namespace lemon {
 		  /// \brief Dummy type to make it easier to create invalid iterators.
 		  ///
 		  /// Dummy type to make it easier to create invalid iterators.
 		  /// See \ref INVALID for the usage.
 		  struct Invalid {
 		  public:
 		    bool operator==(Invalid) { return true;  }
 		    bool operator!=(Invalid) { return false; }
 		    bool operator< (Invalid) { return false; }
 		  };
 		  /// \brief Invalid iterators.
 		  ///
 		  /// \ref Invalid is a global type that converts to each iterator
 		  /// in such a way that the value of the target iterator will be invalid.
 		  //Some people didn't like this:
 		  //const Invalid &INVALID = *(Invalid *)0;
 		#ifdef LEMON_ONLY_TEMPLATES
 		  const Invalid INVALID = Invalid();
 		#else
 		  extern const Invalid INVALID;
 		#endif
 		} //namespace lemon
 		#endif

lemon/bits/utility.h

Show inline comments

 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		// This file contains a modified version of the enable_if library from BOOST.
 		// See the appropriate copyright notice below.
 		// Boost enable_if library
 		// Copyright 2003 (c) The Trustees of Indiana University.
 		// Use, modification, and distribution is subject to the Boost Software
 		// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 		// http://www.boost.org/LICENSE_1_0.txt)
 		//    Authors: Jaakko Jarvi (jajarvi at osl.iu.edu)
 		//             Jeremiah Willcock (jewillco at osl.iu.edu)
 		//             Andrew Lumsdaine (lums at osl.iu.edu)
 		#ifndef LEMON_BITS_UTILITY_H
 		#define LEMON_BITS_UTILITY_H
 		///\file
 		///\brief Miscellaneous basic utilities
 		///
 		///\todo Please rethink the organisation of the basic files like this.
 		///E.g. this file might be merged with invalid.h.
 		namespace lemon
+		{
 		  /// Basic type for defining "tags". A "YES" condition for \c enable_if.
 		  /// Basic type for defining "tags". A "YES" condition for \c enable_if.
 		  ///
 		  ///\sa False
 		  ///
 		  /// \todo This should go to a separate "basic_types.h" (or something)
 		  /// file.
 		  struct True {
 		    ///\e
 		    static const bool value = true;
 		  };
 		  /// Basic type for defining "tags". A "NO" condition for \c enable_if.
 		  /// Basic type for defining "tags". A "NO" condition for \c enable_if.
 		  ///
 		  ///\sa True
 		  struct False {
 		    ///\e
 		    static const bool value = false;
 		  };
 		  struct InvalidType {
 		  };
 		  template <typename T>
 		  struct Wrap {
 		    const T &value;
 		    Wrap(const T &t) : value(t) {}
 		  };
 		  /**************** dummy class to avoid ambiguity ****************/
 		  template<int T> struct dummy { dummy(int) {} };
 		  /**************** enable_if from BOOST ****************/
 		  template <typename Type, typename T = void>
 		  struct exists {
 		    typedef T type;
 		  };
 		  template <bool B, class T = void>
 		  struct enable_if_c {
 		    typedef T type;
 		  };
 		  template <class T>
 		  struct enable_if_c<false, T> {};
 		  template <class Cond, class T = void>
 		  struct enable_if : public enable_if_c<Cond::value, T> {};
 		  template <bool B, class T>
 		  struct lazy_enable_if_c {
 		    typedef typename T::type type;
 		  };
 		  template <class T>
 		  struct lazy_enable_if_c<false, T> {};
 		  template <class Cond, class T>
 		  struct lazy_enable_if : public lazy_enable_if_c<Cond::value, T> {};
 		  template <bool B, class T = void>
 		  struct disable_if_c {
 		    typedef T type;
 		  };
 		  template <class T>
 		  struct disable_if_c<true, T> {};
 		  template <class Cond, class T = void>
 		  struct disable_if : public disable_if_c<Cond::value, T> {};
 		  template <bool B, class T>
 		  struct lazy_disable_if_c {
 		    typedef typename T::type type;
 		  };
 		  template <class T>
 		  struct lazy_disable_if_c<true, T> {};
 		  template <class Cond, class T>
 		  struct lazy_disable_if : public lazy_disable_if_c<Cond::value, T> {};
 		} // namespace lemon
 		#endif

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1	1	/* -- mode: C++; indent-tabs-mode: nil; --
2	2	*
3	3	* This file is a part of LEMON, a generic C++ optimization library.
4	4	*
5	5	* Copyright (C) 2003-2008
6	6	* Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7	7	* (Egervary Research Group on Combinatorial Optimization, EGRES).
8	8	*
9	9	* Permission to use, modify and distribute this software is granted
10	10	* provided that this copyright notice appears in all copies. For
11	11	* precise terms see the accompanying LICENSE file.
12	12	*
13	13	* This software is provided "AS IS" with no warranty of any kind,
14	14	* express or implied, and with no claim as to its suitability for any
15	15	* purpose.
16	16	*
17	17	*/
18	18
19	19	#ifndef LEMON_BITS_BASE_EXTENDER_H
20	20	#define LEMON_BITS_BASE_EXTENDER_H
21	21
22		#include <lemon/~~bits/invalid~~.h>
	22	#include <lemon/core.h>
23	23	#include <lemon/error.h>
24	24
25	25	#include <lemon/bits/map_extender.h>
26	26	#include <lemon/bits/default_map.h>
27	27
28	28	#include <lemon/concept_check.h>
29	29	#include <lemon/concepts/maps.h>
30	30
31	31	///\ingroup digraphbits
32	32	///\file
33	33	///\brief Extenders for the digraph types
34	34	namespace lemon {
35	35
36	36	/// \ingroup digraphbits
37	37	///
38	38	/// \brief BaseDigraph to BaseGraph extender
39	39	template <typename Base>
40	40	class UndirDigraphExtender : public Base {
41	41
42	42	public:
43	43
44	44	typedef Base Parent;
45	45	typedef typename Parent::Arc Edge;
46	46	typedef typename Parent::Node Node;
47	47
48	48	typedef True UndirectedTag;
49	49
50	50	class Arc : public Edge {
51	51	friend class UndirDigraphExtender;
52	52
53	53	protected:
54	54	bool forward;
55	55
56	56	Arc(const Edge &ue, bool _forward) :
57	57	Edge(ue), forward(_forward) {}
58	58
59	59	public:
60	60	Arc() {}
61	61
62	62	/// Invalid arc constructor
63	63	Arc(Invalid i) : Edge(i), forward(true) {}
64	64
65	65	bool operator==(const Arc &that) const {
66	66	return forward==that.forward && Edge(*this)==Edge(that);
67	67	}
68	68	bool operator!=(const Arc &that) const {
69	69	return forward!=that.forward \|\| Edge(*this)!=Edge(that);
70	70	}
71	71	bool operator<(const Arc &that) const {
72	72	return forward<that.forward \|\|
73	73	(!(that.forward<forward) && Edge(*this)<Edge(that));
74	74	}
75	75	};
76	76
77	77
78	78
79	79	using Parent::source;
80	80
81	81	/// Source of the given Arc.
82	82	Node source(const Arc &e) const {
83	83	return e.forward ? Parent::source(e) : Parent::target(e);
84	84	}
85	85
86	86	using Parent::target;
87	87
88	88	/// Target of the given Arc.
89	89	Node target(const Arc &e) const {
90	90	return e.forward ? Parent::target(e) : Parent::source(e);
91	91	}
92	92
93	93	/// \brief Directed arc from an edge.
94	94	///
95	95	/// Returns a directed arc corresponding to the specified Edge.
96	96	/// If the given bool is true the given edge and the
97	97	/// returned arc have the same source node.
98	98	static Arc direct(const Edge &ue, bool d) {
99	99	return Arc(ue, d);
100	100	}
101	101
102	102	/// Returns whether the given directed arc is same orientation as the
103	103	/// corresponding edge.
104	104	///
105	105	/// \todo reference to the corresponding point of the undirected digraph
106	106	/// concept. "What does the direction of an edge mean?"
107	107	static bool direction(const Arc &e) { return e.forward; }
108	108
109	109
110	110	using Parent::first;
111	111	using Parent::next;
112	112
113	113	void first(Arc &e) const {
114	114	Parent::first(e);
115	115	e.forward=true;
116	116	}
117	117
118	118	void next(Arc &e) const {
119	119	if( e.forward ) {
120	120	e.forward = false;
121	121	}
122	122	else {
123	123	Parent::next(e);
124	124	e.forward = true;
125	125	}
126	126	}
127	127
128	128	void firstOut(Arc &e, const Node &n) const {
129	129	Parent::firstIn(e,n);
130	130	if( Edge(e) != INVALID ) {
131	131	e.forward = false;
132	132	}
133	133	else {
134	134	Parent::firstOut(e,n);
135	135	e.forward = true;
136	136	}
137	137	}
138	138	void nextOut(Arc &e) const {
139	139	if( ! e.forward ) {
140	140	Node n = Parent::target(e);
141	141	Parent::nextIn(e);
142	142	if( Edge(e) == INVALID ) {
143	143	Parent::firstOut(e, n);
144	144	e.forward = true;
145	145	}
146	146	}
147	147	else {
148	148	Parent::nextOut(e);
149	149	}
150	150	}
151	151
152	152	void firstIn(Arc &e, const Node &n) const {
153	153	Parent::firstOut(e,n);
154	154	if( Edge(e) != INVALID ) {
155	155	e.forward = false;
156	156	}
157	157	else {
158	158	Parent::firstIn(e,n);
159	159	e.forward = true;
160	160	}
161	161	}
162	162	void nextIn(Arc &e) const {
163	163	if( ! e.forward ) {
164	164	Node n = Parent::source(e);
165	165	Parent::nextOut(e);
166	166	if( Edge(e) == INVALID ) {
167	167	Parent::firstIn(e, n);
168	168	e.forward = true;
169	169	}
170	170	}
171	171	else {
172	172	Parent::nextIn(e);
173	173	}
174	174	}
175	175
176	176	void firstInc(Edge &e, bool &d, const Node &n) const {
177	177	d = true;
178	178	Parent::firstOut(e, n);
179	179	if (e != INVALID) return;
180	180	d = false;
181	181	Parent::firstIn(e, n);
182	182	}
183	183
184	184	void nextInc(Edge &e, bool &d) const {
185	185	if (d) {
186	186	Node s = Parent::source(e);
187	187	Parent::nextOut(e);
188	188	if (e != INVALID) return;
189	189	d = false;
190	190	Parent::firstIn(e, s);
191	191	} else {
192	192	Parent::nextIn(e);
193	193	}
194	194	}
195	195
196	196	Node nodeFromId(int ix) const {
197	197	return Parent::nodeFromId(ix);
198	198	}
199	199
200	200	Arc arcFromId(int ix) const {
201	201	return direct(Parent::arcFromId(ix >> 1), bool(ix & 1));
202	202	}
203	203
204	204	Edge edgeFromId(int ix) const {
205	205	return Parent::arcFromId(ix);
206	206	}
207	207
208	208	int id(const Node &n) const {
209	209	return Parent::id(n);
210	210	}
211	211
212	212	int id(const Edge &e) const {
213	213	return Parent::id(e);
214	214	}
215	215
216	216	int id(const Arc &e) const {
217	217	return 2 * Parent::id(e) + int(e.forward);
218	218	}
219	219
220	220	int maxNodeId() const {
221	221	return Parent::maxNodeId();
222	222	}
223	223
224	224	int maxArcId() const {
225	225	return 2 * Parent::maxArcId() + 1;
226	226	}
227	227
228	228	int maxEdgeId() const {
229	229	return Parent::maxArcId();
230	230	}
231	231
232	232
233	233	int arcNum() const {
234	234	return 2 * Parent::arcNum();
235	235	}
236	236
237	237	int edgeNum() const {
238	238	return Parent::arcNum();
239	239	}
240	240
241	241	Arc findArc(Node s, Node t, Arc p = INVALID) const {
242	242	if (p == INVALID) {
243	243	Edge arc = Parent::findArc(s, t);
244	244	if (arc != INVALID) return direct(arc, true);
245	245	arc = Parent::findArc(t, s);
246	246	if (arc != INVALID) return direct(arc, false);
247	247	} else if (direction(p)) {
248	248	Edge arc = Parent::findArc(s, t, p);
249	249	if (arc != INVALID) return direct(arc, true);
250	250	arc = Parent::findArc(t, s);
251	251	if (arc != INVALID) return direct(arc, false);
252	252	} else {
253	253	Edge arc = Parent::findArc(t, s, p);
254	254	if (arc != INVALID) return direct(arc, false);
255	255	}
256	256	return INVALID;
257	257	}
258	258
259	259	Edge findEdge(Node s, Node t, Edge p = INVALID) const {
260	260	if (s != t) {
261	261	if (p == INVALID) {
262	262	Edge arc = Parent::findArc(s, t);
263	263	if (arc != INVALID) return arc;
264	264	arc = Parent::findArc(t, s);
265	265	if (arc != INVALID) return arc;
266	266	} else if (Parent::s(p) == s) {
267	267	Edge arc = Parent::findArc(s, t, p);
268	268	if (arc != INVALID) return arc;
269	269	arc = Parent::findArc(t, s);
270	270	if (arc != INVALID) return arc;
271	271	} else {
272	272	Edge arc = Parent::findArc(t, s, p);
273	273	if (arc != INVALID) return arc;
274	274	}
275	275	} else {
276	276	return Parent::findArc(s, t, p);
277	277	}
278	278	return INVALID;
279	279	}
280	280	};
281	281
282	282	template <typename Base>
283	283	class BidirBpGraphExtender : public Base {
284	284	public:
285	285	typedef Base Parent;
286	286	typedef BidirBpGraphExtender Digraph;
287	287
288	288	typedef typename Parent::Node Node;
289	289	typedef typename Parent::Edge Edge;
290	290
291	291
292	292	using Parent::first;
293	293	using Parent::next;
294	294
295	295	using Parent::id;
296	296
297	297	class Red : public Node {
298	298	friend class BidirBpGraphExtender;
299	299	public:
300	300	Red() {}
301	301	Red(const Node& node) : Node(node) {
302	302	LEMON_ASSERT(Parent::red(node) \|\| node == INVALID,
303	303	typename Parent::NodeSetError());
304	304	}
305	305	Red& operator=(const Node& node) {
306	306	LEMON_ASSERT(Parent::red(node) \|\| node == INVALID,
307	307	typename Parent::NodeSetError());
308	308	Node::operator=(node);
309	309	return *this;
310	310	}
311	311	Red(Invalid) : Node(INVALID) {}
312	312	Red& operator=(Invalid) {
313	313	Node::operator=(INVALID);
314	314	return *this;
315	315	}
316	316	};
317	317
318	318	void first(Red& node) const {
319	319	Parent::firstRed(static_cast<Node&>(node));
320	320	}
321	321	void next(Red& node) const {
322	322	Parent::nextRed(static_cast<Node&>(node));
323	323	}
324	324
325	325	int id(const Red& node) const {
326	326	return Parent::redId(node);
327	327	}
328	328
329	329	class Blue : public Node {
330	330	friend class BidirBpGraphExtender;
331	331	public:
332	332	Blue() {}
333	333	Blue(const Node& node) : Node(node) {
334	334	LEMON_ASSERT(Parent::blue(node) \|\| node == INVALID,
335	335	typename Parent::NodeSetError());
336	336	}
337	337	Blue& operator=(const Node& node) {
338	338	LEMON_ASSERT(Parent::blue(node) \|\| node == INVALID,
339	339	typename Parent::NodeSetError());
340	340	Node::operator=(node);
341	341	return *this;
342	342	}
343	343	Blue(Invalid) : Node(INVALID) {}
344	344	Blue& operator=(Invalid) {
345	345	Node::operator=(INVALID);
346	346	return *this;
347	347	}
348	348	};
349	349
350	350	void first(Blue& node) const {
351	351	Parent::firstBlue(static_cast<Node&>(node));
352	352	}
353	353	void next(Blue& node) const {
354	354	Parent::nextBlue(static_cast<Node&>(node));
355	355	}
356	356
357	357	int id(const Blue& node) const {
358	358	return Parent::redId(node);
359	359	}
360	360
361	361	Node source(const Edge& arc) const {
362	362	return red(arc);
363	363	}
364	364	Node target(const Edge& arc) const {
365	365	return blue(arc);
366	366	}
367	367
368	368	void firstInc(Edge& arc, bool& dir, const Node& node) const {
369	369	if (Parent::red(node)) {
370	370	Parent::firstFromRed(arc, node);
371	371	dir = true;
372	372	} else {
373	373	Parent::firstFromBlue(arc, node);
374	374	dir = static_cast<Edge&>(arc) == INVALID;
375	375	}
376	376	}
377	377	void nextInc(Edge& arc, bool& dir) const {
378	378	if (dir) {
379	379	Parent::nextFromRed(arc);
380	380	} else {
381	381	Parent::nextFromBlue(arc);
382	382	if (arc == INVALID) dir = true;
383	383	}
384	384	}
385	385
386	386	class Arc : public Edge {
387	387	friend class BidirBpGraphExtender;
388	388	protected:
389	389	bool forward;
390	390
391	391	Arc(const Edge& arc, bool _forward)
392	392	: Edge(arc), forward(_forward) {}
393	393
394	394	public:
395	395	Arc() {}
396	396	Arc (Invalid) : Edge(INVALID), forward(true) {}
397	397	bool operator==(const Arc& i) const {
398	398	return Edge::operator==(i) && forward == i.forward;
399	399	}
400	400	bool operator!=(const Arc& i) const {
401	401	return Edge::operator!=(i) \|\| forward != i.forward;
402	402	}
403	403	bool operator<(const Arc& i) const {
404	404	return Edge::operator<(i) \|\|
405	405	(!(i.forward<forward) && Edge(*this)<Edge(i));
406	406	}
407	407	};
408	408
409	409	void first(Arc& arc) const {
410	410	Parent::first(static_cast<Edge&>(arc));
411	411	arc.forward = true;
412	412	}
413	413
414	414	void next(Arc& arc) const {
415	415	if (!arc.forward) {
416	416	Parent::next(static_cast<Edge&>(arc));
417	417	}
418	418	arc.forward = !arc.forward;
419	419	}
420	420
421	421	void firstOut(Arc& arc, const Node& node) const {
422	422	if (Parent::red(node)) {
423	423	Parent::firstFromRed(arc, node);
424	424	arc.forward = true;
425	425	} else {
426	426	Parent::firstFromBlue(arc, node);
427	427	arc.forward = static_cast<Edge&>(arc) == INVALID;
428	428	}
429	429	}
430	430	void nextOut(Arc& arc) const {
431	431	if (arc.forward) {
432	432	Parent::nextFromRed(arc);
433	433	} else {
434	434	Parent::nextFromBlue(arc);
435	435	arc.forward = static_cast<Edge&>(arc) == INVALID;
436	436	}
437	437	}
438	438
439	439	void firstIn(Arc& arc, const Node& node) const {
440	440	if (Parent::blue(node)) {
441	441	Parent::firstFromBlue(arc, node);
442	442	arc.forward = true;
443	443	} else {
444	444	Parent::firstFromRed(arc, node);
445	445	arc.forward = static_cast<Edge&>(arc) == INVALID;
446	446	}
447	447	}
448	448	void nextIn(Arc& arc) const {
449	449	if (arc.forward) {
450	450	Parent::nextFromBlue(arc);
451	451	} else {
452	452	Parent::nextFromRed(arc);
453	453	arc.forward = static_cast<Edge&>(arc) == INVALID;
454	454	}
455	455	}
456	456
457	457	Node source(const Arc& arc) const {
458	458	return arc.forward ? Parent::red(arc) : Parent::blue(arc);
459	459	}
460	460	Node target(const Arc& arc) const {
461	461	return arc.forward ? Parent::blue(arc) : Parent::red(arc);
462	462	}
463	463
464	464	int id(const Arc& arc) const {
465	465	return (Parent::id(static_cast<const Edge&>(arc)) << 1) +
466	466	(arc.forward ? 0 : 1);
467	467	}
468	468	Arc arcFromId(int ix) const {
469	469	return Arc(Parent::fromEdgeId(ix >> 1), (ix & 1) == 0);
470	470	}
471	471	int maxArcId() const {
472	472	return (Parent::maxEdgeId() << 1) + 1;
473	473	}
474	474
475	475	bool direction(const Arc& arc) const {
476	476	return arc.forward;
477	477	}
478	478
479	479	Arc direct(const Edge& arc, bool dir) const {
480	480	return Arc(arc, dir);
481	481	}
482	482
483	483	int arcNum() const {
484	484	return 2 * Parent::edgeNum();
485	485	}
486	486
487	487	int edgeNum() const {
488	488	return Parent::edgeNum();
489	489	}
490	490
491	491
492	492	};
493	493	}
494	494
495	495	#endif