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Ticket #97: 5b8f6f06687e.patch

File 5b8f6f06687e.patch, 190.9 KB (added by Balazs Dezso, 16 years ago)

  • lemon/Makefile.am 

    # HG changeset patch
# User Balazs Dezso <deba@inf.elte.hu>
# Date 1216112363 -7200
# Node ID 5b8f6f06687e42f0e0b8141ad1a3a0439effed8f
# Parent  b67149f0e6757cc1132d30f6ca7d4050e210b66c
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.

diff -r b67149f0e675 -r 5b8f6f06687e lemon/Makefile.am
    a b  
    2424        lemon/color.h \
    2525        lemon/concept_check.h \
    2626        lemon/counter.h \
     27        lemon/core.h \
    2728        lemon/dfs.h \
    2829        lemon/dijkstra.h \
    2930        lemon/dim2.h \
    3031        lemon/error.h \
    3132        lemon/graph_to_eps.h \
    32         lemon/graph_utils.h \
    3333        lemon/kruskal.h \
    3434        lemon/lgf_reader.h \
    3535        lemon/lgf_writer.h \
    … …  
    4949        lemon/bits/base_extender.h \
    5050        lemon/bits/bezier.h \
    5151        lemon/bits/default_map.h \
     52        lemon/bits/enable_if.h \
    5253        lemon/bits/graph_extender.h \
    53         lemon/bits/invalid.h \
    5454        lemon/bits/map_extender.h \
    5555        lemon/bits/path_dump.h \
    5656        lemon/bits/traits.h \
    57         lemon/bits/utility.h \
    5857        lemon/bits/vector_map.h
    5958
    6059concept_HEADERS += \

  • lemon/bfs.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bfs.h
    a b  
    2424///\brief Bfs algorithm.
    2525
    2626#include <lemon/list_graph.h>
    27 #include <lemon/graph_utils.h>
    2827#include <lemon/bits/path_dump.h>
    29 #include <lemon/bits/invalid.h>
     28#include <lemon/core.h>
    3029#include <lemon/error.h>
    3130#include <lemon/maps.h>
    3231

  • lemon/bits/alteration_notifier.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bits/alteration_notifier.h
    a b  
    2222#include <vector>
    2323#include <list>
    2424
    25 #include <lemon/bits/utility.h>
     25#include <lemon/core.h>
    2626
    2727///\ingroup graphbits
    2828///\file

  • lemon/bits/base_extender.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bits/base_extender.h
    a b  
    1919#ifndef LEMON_BITS_BASE_EXTENDER_H
    2020#define LEMON_BITS_BASE_EXTENDER_H
    2121
    22 #include <lemon/bits/invalid.h>
     22#include <lemon/core.h>
    2323#include <lemon/error.h>
    2424
    2525#include <lemon/bits/map_extender.h>

  • new file lemon/bits/enable_if.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bits/enable_if.h
    - +  
     1/* -*- mode: C++; indent-tabs-mode: nil; -*-
     2 *
     3 * This file is a part of LEMON, a generic C++ optimization library.
     4 *
     5 * Copyright (C) 2003-2008
     6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8 *
     9 * Permission to use, modify and distribute this software is granted
     10 * provided that this copyright notice appears in all copies. For
     11 * precise terms see the accompanying LICENSE file.
     12 *
     13 * This software is provided "AS IS" with no warranty of any kind,
     14 * express or implied, and with no claim as to its suitability for any
     15 * purpose.
     16 *
     17 */
     18
     19// This file contains a modified version of the enable_if library from BOOST.
     20// See the appropriate copyright notice below.
     21
     22// Boost enable_if library
     23
     24// Copyright 2003 (c) The Trustees of Indiana University.
     25
     26// Use, modification, and distribution is subject to the Boost Software
     27// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
     28// http://www.boost.org/LICENSE_1_0.txt)
     29
     30//    Authors: Jaakko Jarvi (jajarvi at osl.iu.edu)
     31//             Jeremiah Willcock (jewillco at osl.iu.edu)
     32//             Andrew Lumsdaine (lums at osl.iu.edu)
     33
     34
     35#ifndef LEMON_BITS_ENABLE_IF_H
     36#define LEMON_BITS_ENABLE_IF_H
     37
     38///\file
     39///\brief Miscellaneous basic utilities
     40///
     41///\todo Please rethink the organisation of the basic files like this.
     42///E.g. this file might be merged with invalid.h.
     43
     44
     45namespace lemon
     46{
     47
     48  /// Basic type for defining "tags". A "YES" condition for \c enable_if.
     49
     50  /// Basic type for defining "tags". A "YES" condition for \c enable_if.
     51  ///
     52  ///\sa False
     53  ///
     54  /// \todo This should go to a separate "basic_types.h" (or something)
     55  /// file.
     56  struct True {
     57    ///\e
     58    static const bool value = true;
     59  };
     60
     61  /// Basic type for defining "tags". A "NO" condition for \c enable_if.
     62
     63  /// Basic type for defining "tags". A "NO" condition for \c enable_if.
     64  ///
     65  ///\sa True
     66  struct False {
     67    ///\e
     68    static const bool value = false;
     69  };
     70
     71
     72
     73  template <typename T>
     74  struct Wrap {
     75    const T &value;
     76    Wrap(const T &t) : value(t) {}
     77  };
     78
     79  /**************** dummy class to avoid ambiguity ****************/
     80
     81  template<int T> struct dummy { dummy(int) {} };
     82
     83  /**************** enable_if from BOOST ****************/
     84
     85  template <typename Type, typename T = void>
     86  struct exists {
     87    typedef T type;
     88  };
     89
     90
     91  template <bool B, class T = void>
     92  struct enable_if_c {
     93    typedef T type;
     94  };
     95
     96  template <class T>
     97  struct enable_if_c<false, T> {};
     98
     99  template <class Cond, class T = void>
     100  struct enable_if : public enable_if_c<Cond::value, T> {};
     101
     102  template <bool B, class T>
     103  struct lazy_enable_if_c {
     104    typedef typename T::type type;
     105  };
     106
     107  template <class T>
     108  struct lazy_enable_if_c<false, T> {};
     109
     110  template <class Cond, class T>
     111  struct lazy_enable_if : public lazy_enable_if_c<Cond::value, T> {};
     112
     113
     114  template <bool B, class T = void>
     115  struct disable_if_c {
     116    typedef T type;
     117  };
     118
     119  template <class T>
     120  struct disable_if_c<true, T> {};
     121
     122  template <class Cond, class T = void>
     123  struct disable_if : public disable_if_c<Cond::value, T> {};
     124
     125  template <bool B, class T>
     126  struct lazy_disable_if_c {
     127    typedef typename T::type type;
     128  };
     129
     130  template <class T>
     131  struct lazy_disable_if_c<true, T> {};
     132
     133  template <class Cond, class T>
     134  struct lazy_disable_if : public lazy_disable_if_c<Cond::value, T> {};
     135
     136} // namespace lemon
     137
     138#endif

  • lemon/bits/graph_extender.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bits/graph_extender.h
    a b  
    1919#ifndef LEMON_BITS_GRAPH_EXTENDER_H
    2020#define LEMON_BITS_GRAPH_EXTENDER_H
    2121
    22 #include <lemon/bits/invalid.h>
    23 #include <lemon/bits/utility.h>
     22#include <lemon/core.h>
    2423
    2524#include <lemon/bits/map_extender.h>
    2625#include <lemon/bits/default_map.h>

  • deleted file lemon/bits/invalid.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bits/invalid.h
    + -  
    1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
    2  *
    3  * This file is a part of LEMON, a generic C++ optimization library.
    4  *
    5  * Copyright (C) 2003-2008
    6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
    7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
    8  *
    9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #ifndef LEMON_BITS_INVALID_H
    20 #define LEMON_BITS_INVALID_H
    21 
    22 ///\file
    23 ///\brief Definition of INVALID.
    24 
    25 namespace lemon {
    26 
    27   /// \brief Dummy type to make it easier to create invalid iterators.
    28   ///
    29   /// Dummy type to make it easier to create invalid iterators.
    30   /// See \ref INVALID for the usage.
    31   struct Invalid {
    32   public:
    33     bool operator==(Invalid) { return true;  }
    34     bool operator!=(Invalid) { return false; }
    35     bool operator< (Invalid) { return false; }
    36   };
    37 
    38   /// \brief Invalid iterators.
    39   ///
    40   /// \ref Invalid is a global type that converts to each iterator
    41   /// in such a way that the value of the target iterator will be invalid.
    42 
    43   //Some people didn't like this:
    44   //const Invalid &INVALID = *(Invalid *)0;
    45 
    46 #ifdef LEMON_ONLY_TEMPLATES
    47   const Invalid INVALID = Invalid();
    48 #else
    49   extern const Invalid INVALID;
    50 #endif
    51 
    52 } //namespace lemon
    53 
    54 #endif
    55 

  • lemon/bits/traits.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bits/traits.h
    a b  
    1919#ifndef LEMON_BITS_TRAITS_H
    2020#define LEMON_BITS_TRAITS_H
    2121
    22 #include <lemon/bits/utility.h>
    23 
    2422///\file
    2523///\brief Traits for graphs and maps
    2624///
    2725
     26#include <lemon/bits/enable_if.h>
     27
    2828namespace lemon {
     29
     30  struct InvalidType {};
     31
    2932  template <typename _Graph, typename _Item>
    3033  class ItemSetTraits {};
    3134

  • deleted file lemon/bits/utility.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bits/utility.h
    + -  
    1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
    2  *
    3  * This file is a part of LEMON, a generic C++ optimization library.
    4  *
    5  * Copyright (C) 2003-2008
    6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
    7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
    8  *
    9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 // This file contains a modified version of the enable_if library from BOOST.
    20 // See the appropriate copyright notice below.
    21 
    22 // Boost enable_if library
    23 
    24 // Copyright 2003 (c) The Trustees of Indiana University.
    25 
    26 // Use, modification, and distribution is subject to the Boost Software
    27 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
    28 // http://www.boost.org/LICENSE_1_0.txt)
    29 
    30 //    Authors: Jaakko Jarvi (jajarvi at osl.iu.edu)
    31 //             Jeremiah Willcock (jewillco at osl.iu.edu)
    32 //             Andrew Lumsdaine (lums at osl.iu.edu)
    33 
    34 
    35 #ifndef LEMON_BITS_UTILITY_H
    36 #define LEMON_BITS_UTILITY_H
    37 
    38 ///\file
    39 ///\brief Miscellaneous basic utilities
    40 ///
    41 ///\todo Please rethink the organisation of the basic files like this.
    42 ///E.g. this file might be merged with invalid.h.
    43 
    44 
    45 namespace lemon
    46 {
    47 
    48   /// Basic type for defining "tags". A "YES" condition for \c enable_if.
    49 
    50   /// Basic type for defining "tags". A "YES" condition for \c enable_if.
    51   ///
    52   ///\sa False
    53   ///
    54   /// \todo This should go to a separate "basic_types.h" (or something)
    55   /// file.
    56   struct True {
    57     ///\e
    58     static const bool value = true;
    59   };
    60 
    61   /// Basic type for defining "tags". A "NO" condition for \c enable_if.
    62 
    63   /// Basic type for defining "tags". A "NO" condition for \c enable_if.
    64   ///
    65   ///\sa True
    66   struct False {
    67     ///\e
    68     static const bool value = false;
    69   };
    70 
    71 
    72   struct InvalidType {
    73   };
    74 
    75   template <typename T>
    76   struct Wrap {
    77     const T &value;
    78     Wrap(const T &t) : value(t) {}
    79   };
    80 
    81   /**************** dummy class to avoid ambiguity ****************/
    82 
    83   template<int T> struct dummy { dummy(int) {} };
    84 
    85   /**************** enable_if from BOOST ****************/
    86 
    87   template <typename Type, typename T = void>
    88   struct exists {
    89     typedef T type;
    90   };
    91 
    92 
    93   template <bool B, class T = void>
    94   struct enable_if_c {
    95     typedef T type;
    96   };
    97 
    98   template <class T>
    99   struct enable_if_c<false, T> {};
    100 
    101   template <class Cond, class T = void>
    102   struct enable_if : public enable_if_c<Cond::value, T> {};
    103 
    104   template <bool B, class T>
    105   struct lazy_enable_if_c {
    106     typedef typename T::type type;
    107   };
    108 
    109   template <class T>
    110   struct lazy_enable_if_c<false, T> {};
    111 
    112   template <class Cond, class T>
    113   struct lazy_enable_if : public lazy_enable_if_c<Cond::value, T> {};
    114 
    115 
    116   template <bool B, class T = void>
    117   struct disable_if_c {
    118     typedef T type;
    119   };
    120 
    121   template <class T>
    122   struct disable_if_c<true, T> {};
    123 
    124   template <class Cond, class T = void>
    125   struct disable_if : public disable_if_c<Cond::value, T> {};
    126 
    127   template <bool B, class T>
    128   struct lazy_disable_if_c {
    129     typedef typename T::type type;
    130   };
    131 
    132   template <class T>
    133   struct lazy_disable_if_c<true, T> {};
    134 
    135   template <class Cond, class T>
    136   struct lazy_disable_if : public lazy_disable_if_c<Cond::value, T> {};
    137 
    138 } // namespace lemon
    139 
    140 #endif

  • lemon/bits/vector_map.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/bits/vector_map.h
    a b  
    2222#include <vector>
    2323#include <algorithm>
    2424
    25 #include <lemon/bits/traits.h>
    26 #include <lemon/bits/utility.h>
    27 
     25#include <lemon/core.h>
    2826#include <lemon/bits/alteration_notifier.h>
    2927
    3028#include <lemon/concept_check.h>

  • lemon/concepts/digraph.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/concepts/digraph.h
    a b  
    2323///\file
    2424///\brief The concept of directed graphs.
    2525
    26 #include <lemon/bits/invalid.h>
    27 #include <lemon/bits/utility.h>
     26#include <lemon/core.h>
    2827#include <lemon/concepts/maps.h>
    2928#include <lemon/concept_check.h>
    3029#include <lemon/concepts/graph_components.h>

  • lemon/concepts/graph.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/concepts/graph.h
    a b  
    2525
    2626#include <lemon/concepts/graph_components.h>
    2727#include <lemon/concepts/graph.h>
    28 #include <lemon/bits/utility.h>
     28#include <lemon/core.h>
    2929
    3030namespace lemon {
    3131  namespace concepts {

  • lemon/concepts/graph_components.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/concepts/graph_components.h
    a b  
    2424#ifndef LEMON_CONCEPT_GRAPH_COMPONENTS_H
    2525#define LEMON_CONCEPT_GRAPH_COMPONENTS_H
    2626
    27 #include <lemon/bits/invalid.h>
     27#include <lemon/core.h>
    2828#include <lemon/concepts/maps.h>
    2929
    3030#include <lemon/bits/alteration_notifier.h>

  • lemon/concepts/heap.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/concepts/heap.h
    a b  
    2323#ifndef LEMON_CONCEPT_HEAP_H
    2424#define LEMON_CONCEPT_HEAP_H
    2525
    26 #include <lemon/bits/invalid.h>
     26#include <lemon/core.h>
    2727
    2828namespace lemon {
    2929

  • lemon/concepts/maps.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/concepts/maps.h
    a b  
    1919#ifndef LEMON_CONCEPT_MAPS_H
    2020#define LEMON_CONCEPT_MAPS_H
    2121
    22 #include <lemon/bits/utility.h>
     22#include <lemon/core.h>
    2323#include <lemon/concept_check.h>
    2424
    2525///\ingroup concept

  • lemon/concepts/path.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/concepts/path.h
    a b  
    2525#ifndef LEMON_CONCEPT_PATH_H
    2626#define LEMON_CONCEPT_PATH_H
    2727
    28 #include <lemon/bits/invalid.h>
    29 #include <lemon/bits/utility.h>
     28#include <lemon/core.h>
    3029#include <lemon/concept_check.h>
    3130
    3231namespace lemon {

  • new file lemon/core.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/core.h
    - +  
     1/* -*- mode: C++; indent-tabs-mode: nil; -*-
     2 *
     3 * This file is a part of LEMON, a generic C++ optimization library.
     4 *
     5 * Copyright (C) 2003-2008
     6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8 *
     9 * Permission to use, modify and distribute this software is granted
     10 * provided that this copyright notice appears in all copies. For
     11 * precise terms see the accompanying LICENSE file.
     12 *
     13 * This software is provided "AS IS" with no warranty of any kind,
     14 * express or implied, and with no claim as to its suitability for any
     15 * purpose.
     16 *
     17 */
     18
     19#ifndef LEMON_CORE_H
     20#define LEMON_CORE_H
     21
     22#include <vector>
     23#include <algorithm>
     24
     25#include <lemon/bits/enable_if.h>
     26#include <lemon/bits/traits.h>
     27
     28///\file
     29///\brief LEMON core utilities.
     30
     31namespace lemon {
     32
     33  /// \brief Dummy type to make it easier to create invalid iterators.
     34  ///
     35  /// Dummy type to make it easier to create invalid iterators.
     36  /// See \ref INVALID for the usage.
     37  struct Invalid {
     38  public:
     39    bool operator==(Invalid) { return true;  }
     40    bool operator!=(Invalid) { return false; }
     41    bool operator< (Invalid) { return false; }
     42  };
     43
     44  /// \brief Invalid iterators.
     45  ///
     46  /// \ref Invalid is a global type that converts to each iterator
     47  /// in such a way that the value of the target iterator will be invalid.
     48#ifdef LEMON_ONLY_TEMPLATES
     49  const Invalid INVALID = Invalid();
     50#else
     51  extern const Invalid INVALID;
     52#endif
     53
     54  /// \addtogroup gutils
     55  /// @{
     56
     57  ///Creates convenience typedefs for the digraph types and iterators
     58
     59  ///This \c \#define creates convenience typedefs for the following types
     60  ///of \c Digraph: \c Node,  \c NodeIt, \c Arc, \c ArcIt, \c InArcIt,
     61  ///\c OutArcIt, \c BoolNodeMap, \c IntNodeMap, \c DoubleNodeMap,
     62  ///\c BoolArcMap, \c IntArcMap, \c DoubleArcMap.
     63  ///
     64  ///\note If the graph type is a dependent type, ie. the graph type depend
     65  ///on a template parameter, then use \c TEMPLATE_DIGRAPH_TYPEDEFS()
     66  ///macro.
     67#define DIGRAPH_TYPEDEFS(Digraph)                                       \
     68  typedef Digraph::Node Node;                                           \
     69  typedef Digraph::NodeIt NodeIt;                                       \
     70  typedef Digraph::Arc Arc;                                             \
     71  typedef Digraph::ArcIt ArcIt;                                         \
     72  typedef Digraph::InArcIt InArcIt;                                     \
     73  typedef Digraph::OutArcIt OutArcIt;                                   \
     74  typedef Digraph::NodeMap<bool> BoolNodeMap;                           \
     75  typedef Digraph::NodeMap<int> IntNodeMap;                             \
     76  typedef Digraph::NodeMap<double> DoubleNodeMap;                       \
     77  typedef Digraph::ArcMap<bool> BoolArcMap;                             \
     78  typedef Digraph::ArcMap<int> IntArcMap;                               \
     79  typedef Digraph::ArcMap<double> DoubleArcMap
     80
     81  ///Creates convenience typedefs for the digraph types and iterators
     82
     83  ///\see DIGRAPH_TYPEDEFS
     84  ///
     85  ///\note Use this macro, if the graph type is a dependent type,
     86  ///ie. the graph type depend on a template parameter.
     87#define TEMPLATE_DIGRAPH_TYPEDEFS(Digraph)                              \
     88  typedef typename Digraph::Node Node;                                  \
     89  typedef typename Digraph::NodeIt NodeIt;                              \
     90  typedef typename Digraph::Arc Arc;                                    \
     91  typedef typename Digraph::ArcIt ArcIt;                                \
     92  typedef typename Digraph::InArcIt InArcIt;                            \
     93  typedef typename Digraph::OutArcIt OutArcIt;                          \
     94  typedef typename Digraph::template NodeMap<bool> BoolNodeMap;         \
     95  typedef typename Digraph::template NodeMap<int> IntNodeMap;           \
     96  typedef typename Digraph::template NodeMap<double> DoubleNodeMap;     \
     97  typedef typename Digraph::template ArcMap<bool> BoolArcMap;           \
     98  typedef typename Digraph::template ArcMap<int> IntArcMap;             \
     99  typedef typename Digraph::template ArcMap<double> DoubleArcMap
     100
     101  ///Creates convenience typedefs for the graph types and iterators
     102
     103  ///This \c \#define creates the same convenience typedefs as defined
     104  ///by \ref DIGRAPH_TYPEDEFS(Graph) and six more, namely it creates
     105  ///\c Edge, \c EdgeIt, \c IncEdgeIt, \c BoolEdgeMap, \c IntEdgeMap,
     106  ///\c DoubleEdgeMap.
     107  ///
     108  ///\note If the graph type is a dependent type, ie. the graph type depend
     109  ///on a template parameter, then use \c TEMPLATE_DIGRAPH_TYPEDEFS()
     110  ///macro.
     111#define GRAPH_TYPEDEFS(Graph)                                           \
     112  DIGRAPH_TYPEDEFS(Graph);                                              \
     113  typedef Graph::Edge Edge;                                             \
     114  typedef Graph::EdgeIt EdgeIt;                                         \
     115  typedef Graph::IncEdgeIt IncEdgeIt;                                   \
     116  typedef Graph::EdgeMap<bool> BoolEdgeMap;                             \
     117  typedef Graph::EdgeMap<int> IntEdgeMap;                               \
     118  typedef Graph::EdgeMap<double> DoubleEdgeMap
     119
     120  ///Creates convenience typedefs for the graph types and iterators
     121
     122  ///\see GRAPH_TYPEDEFS
     123  ///
     124  ///\note Use this macro, if the graph type is a dependent type,
     125  ///ie. the graph type depend on a template parameter.
     126#define TEMPLATE_GRAPH_TYPEDEFS(Graph)                                  \
     127  TEMPLATE_DIGRAPH_TYPEDEFS(Graph);                                     \
     128  typedef typename Graph::Edge Edge;                                    \
     129  typedef typename Graph::EdgeIt EdgeIt;                                \
     130  typedef typename Graph::IncEdgeIt IncEdgeIt;                          \
     131  typedef typename Graph::template EdgeMap<bool> BoolEdgeMap;           \
     132  typedef typename Graph::template EdgeMap<int> IntEdgeMap;             \
     133  typedef typename Graph::template EdgeMap<double> DoubleEdgeMap
     134
     135  /// \brief Function to count the items in the graph.
     136  ///
     137  /// This function counts the items (nodes, arcs etc) in the graph.
     138  /// The complexity of the function is O(n) because
     139  /// it iterates on all of the items.
     140  template <typename Graph, typename Item>
     141  inline int countItems(const Graph& g) {
     142    typedef typename ItemSetTraits<Graph, Item>::ItemIt ItemIt;
     143    int num = 0;
     144    for (ItemIt it(g); it != INVALID; ++it) {
     145      ++num;
     146    }
     147    return num;
     148  }
     149
     150  // Node counting:
     151
     152  namespace _core_bits {
     153
     154    template <typename Graph, typename Enable = void>
     155    struct CountNodesSelector {
     156      static int count(const Graph &g) {
     157        return countItems<Graph, typename Graph::Node>(g);
     158      }
     159    };
     160
     161    template <typename Graph>
     162    struct CountNodesSelector<
     163      Graph, typename
     164      enable_if<typename Graph::NodeNumTag, void>::type>
     165    {
     166      static int count(const Graph &g) {
     167        return g.nodeNum();
     168      }
     169    };
     170  }
     171
     172  /// \brief Function to count the nodes in the graph.
     173  ///
     174  /// This function counts the nodes in the graph.
     175  /// The complexity of the function is O(n) but for some
     176  /// graph structures it is specialized to run in O(1).
     177  ///
     178  /// If the graph contains a \e nodeNum() member function and a
     179  /// \e NodeNumTag tag then this function calls directly the member
     180  /// function to query the cardinality of the node set.
     181  template <typename Graph>
     182  inline int countNodes(const Graph& g) {
     183    return _core_bits::CountNodesSelector<Graph>::count(g);
     184  }
     185
     186  // Arc counting:
     187
     188  namespace _core_bits {
     189
     190    template <typename Graph, typename Enable = void>
     191    struct CountArcsSelector {
     192      static int count(const Graph &g) {
     193        return countItems<Graph, typename Graph::Arc>(g);
     194      }
     195    };
     196
     197    template <typename Graph>
     198    struct CountArcsSelector<
     199      Graph,
     200      typename enable_if<typename Graph::ArcNumTag, void>::type>
     201    {
     202      static int count(const Graph &g) {
     203        return g.arcNum();
     204      }
     205    };
     206  }
     207
     208  /// \brief Function to count the arcs in the graph.
     209  ///
     210  /// This function counts the arcs in the graph.
     211  /// The complexity of the function is O(e) but for some
     212  /// graph structures it is specialized to run in O(1).
     213  ///
     214  /// If the graph contains a \e arcNum() member function and a
     215  /// \e EdgeNumTag tag then this function calls directly the member
     216  /// function to query the cardinality of the arc set.
     217  template <typename Graph>
     218  inline int countArcs(const Graph& g) {
     219    return _core_bits::CountArcsSelector<Graph>::count(g);
     220  }
     221
     222  // Edge counting:
     223  namespace _core_bits {
     224
     225    template <typename Graph, typename Enable = void>
     226    struct CountEdgesSelector {
     227      static int count(const Graph &g) {
     228        return countItems<Graph, typename Graph::Edge>(g);
     229      }
     230    };
     231
     232    template <typename Graph>
     233    struct CountEdgesSelector<
     234      Graph,
     235      typename enable_if<typename Graph::EdgeNumTag, void>::type>
     236    {
     237      static int count(const Graph &g) {
     238        return g.edgeNum();
     239      }
     240    };
     241  }
     242
     243  /// \brief Function to count the edges in the graph.
     244  ///
     245  /// This function counts the edges in the graph.
     246  /// The complexity of the function is O(m) but for some
     247  /// graph structures it is specialized to run in O(1).
     248  ///
     249  /// If the graph contains a \e edgeNum() member function and a
     250  /// \e EdgeNumTag tag then this function calls directly the member
     251  /// function to query the cardinality of the edge set.
     252  template <typename Graph>
     253  inline int countEdges(const Graph& g) {
     254    return _core_bits::CountEdgesSelector<Graph>::count(g);
     255
     256  }
     257
     258
     259  template <typename Graph, typename DegIt>
     260  inline int countNodeDegree(const Graph& _g, const typename Graph::Node& _n) {
     261    int num = 0;
     262    for (DegIt it(_g, _n); it != INVALID; ++it) {
     263      ++num;
     264    }
     265    return num;
     266  }
     267
     268  /// \brief Function to count the number of the out-arcs from node \c n.
     269  ///
     270  /// This function counts the number of the out-arcs from node \c n
     271  /// in the graph.
     272  template <typename Graph>
     273  inline int countOutArcs(const Graph& _g,  const typename Graph::Node& _n) {
     274    return countNodeDegree<Graph, typename Graph::OutArcIt>(_g, _n);
     275  }
     276
     277  /// \brief Function to count the number of the in-arcs to node \c n.
     278  ///
     279  /// This function counts the number of the in-arcs to node \c n
     280  /// in the graph.
     281  template <typename Graph>
     282  inline int countInArcs(const Graph& _g,  const typename Graph::Node& _n) {
     283    return countNodeDegree<Graph, typename Graph::InArcIt>(_g, _n);
     284  }
     285
     286  /// \brief Function to count the number of the inc-edges to node \c n.
     287  ///
     288  /// This function counts the number of the inc-edges to node \c n
     289  /// in the graph.
     290  template <typename Graph>
     291  inline int countIncEdges(const Graph& _g,  const typename Graph::Node& _n) {
     292    return countNodeDegree<Graph, typename Graph::IncEdgeIt>(_g, _n);
     293  }
     294
     295  namespace _core_bits {
     296
     297    template <typename Digraph, typename Item, typename RefMap>
     298    class MapCopyBase {
     299    public:
     300      virtual void copy(const Digraph& from, const RefMap& refMap) = 0;
     301
     302      virtual ~MapCopyBase() {}
     303    };
     304
     305    template <typename Digraph, typename Item, typename RefMap,
     306              typename ToMap, typename FromMap>
     307    class MapCopy : public MapCopyBase<Digraph, Item, RefMap> {
     308    public:
     309
     310      MapCopy(ToMap& tmap, const FromMap& map)
     311        : _tmap(tmap), _map(map) {}
     312
     313      virtual void copy(const Digraph& digraph, const RefMap& refMap) {
     314        typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt;
     315        for (ItemIt it(digraph); it != INVALID; ++it) {
     316          _tmap.set(refMap[it], _map[it]);
     317        }
     318      }
     319
     320    private:
     321      ToMap& _tmap;
     322      const FromMap& _map;
     323    };
     324
     325    template <typename Digraph, typename Item, typename RefMap, typename It>
     326    class ItemCopy : public MapCopyBase<Digraph, Item, RefMap> {
     327    public:
     328
     329      ItemCopy(It& it, const Item& item) : _it(it), _item(item) {}
     330
     331      virtual void copy(const Digraph&, const RefMap& refMap) {
     332        _it = refMap[_item];
     333      }
     334
     335    private:
     336      It& _it;
     337      Item _item;
     338    };
     339
     340    template <typename Digraph, typename Item, typename RefMap, typename Ref>
     341    class RefCopy : public MapCopyBase<Digraph, Item, RefMap> {
     342    public:
     343
     344      RefCopy(Ref& map) : _map(map) {}
     345
     346      virtual void copy(const Digraph& digraph, const RefMap& refMap) {
     347        typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt;
     348        for (ItemIt it(digraph); it != INVALID; ++it) {
     349          _map.set(it, refMap[it]);
     350        }
     351      }
     352
     353    private:
     354      Ref& _map;
     355    };
     356
     357    template <typename Digraph, typename Item, typename RefMap,
     358              typename CrossRef>
     359    class CrossRefCopy : public MapCopyBase<Digraph, Item, RefMap> {
     360    public:
     361
     362      CrossRefCopy(CrossRef& cmap) : _cmap(cmap) {}
     363
     364      virtual void copy(const Digraph& digraph, const RefMap& refMap) {
     365        typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt;
     366        for (ItemIt it(digraph); it != INVALID; ++it) {
     367          _cmap.set(refMap[it], it);
     368        }
     369      }
     370
     371    private:
     372      CrossRef& _cmap;
     373    };
     374
     375    template <typename Digraph, typename Enable = void>
     376    struct DigraphCopySelector {
     377      template <typename From, typename NodeRefMap, typename ArcRefMap>
     378      static void copy(Digraph &to, const From& from,
     379                       NodeRefMap& nodeRefMap, ArcRefMap& arcRefMap) {
     380        for (typename From::NodeIt it(from); it != INVALID; ++it) {
     381          nodeRefMap[it] = to.addNode();
     382        }
     383        for (typename From::ArcIt it(from); it != INVALID; ++it) {
     384          arcRefMap[it] = to.addArc(nodeRefMap[from.source(it)],
     385                                    nodeRefMap[from.target(it)]);
     386        }
     387      }
     388    };
     389
     390    template <typename Digraph>
     391    struct DigraphCopySelector<
     392      Digraph,
     393      typename enable_if<typename Digraph::BuildTag, void>::type>
     394    {
     395      template <typename From, typename NodeRefMap, typename ArcRefMap>
     396      static void copy(Digraph &to, const From& from,
     397                       NodeRefMap& nodeRefMap, ArcRefMap& arcRefMap) {
     398        to.build(from, nodeRefMap, arcRefMap);
     399      }
     400    };
     401
     402    template <typename Graph, typename Enable = void>
     403    struct GraphCopySelector {
     404      template <typename From, typename NodeRefMap, typename EdgeRefMap>
     405      static void copy(Graph &to, const From& from,
     406                       NodeRefMap& nodeRefMap, EdgeRefMap& edgeRefMap) {
     407        for (typename From::NodeIt it(from); it != INVALID; ++it) {
     408          nodeRefMap[it] = to.addNode();
     409        }
     410        for (typename From::EdgeIt it(from); it != INVALID; ++it) {
     411          edgeRefMap[it] = to.addEdge(nodeRefMap[from.u(it)],
     412                                      nodeRefMap[from.v(it)]);
     413        }
     414      }
     415    };
     416
     417    template <typename Graph>
     418    struct GraphCopySelector<
     419      Graph,
     420      typename enable_if<typename Graph::BuildTag, void>::type>
     421    {
     422      template <typename From, typename NodeRefMap, typename EdgeRefMap>
     423      static void copy(Graph &to, const From& from,
     424                       NodeRefMap& nodeRefMap, EdgeRefMap& edgeRefMap) {
     425        to.build(from, nodeRefMap, edgeRefMap);
     426      }
     427    };
     428
     429  }
     430
     431  /// \brief Class to copy a digraph.
     432  ///
     433  /// Class to copy a digraph to another digraph (duplicate a digraph). The
     434  /// simplest way of using it is through the \c copyDigraph() function.
     435  ///
     436  /// This class not just make a copy of a graph, but it can create
     437  /// references and cross references between the nodes and arcs of
     438  /// the two graphs, it can copy maps for use with the newly created
     439  /// graph and copy nodes and arcs.
     440  ///
     441  /// To make a copy from a graph, first an instance of DigraphCopy
     442  /// should be created, then the data belongs to the graph should
     443  /// assigned to copy. In the end, the \c run() member should be
     444  /// called.
     445  ///
     446  /// The next code copies a graph with several data:
     447  ///\code
     448  ///  DigraphCopy<NewGraph, OrigGraph> dc(new_graph, orig_graph);
     449  ///  // create a reference for the nodes
     450  ///  OrigGraph::NodeMap<NewGraph::Node> nr(orig_graph);
     451  ///  dc.nodeRef(nr);
     452  ///  // create a cross reference (inverse) for the arcs
     453  ///  NewGraph::ArcMap<OrigGraph::Arc> acr(new_graph);
     454  ///  dc.arcCrossRef(acr);
     455  ///  // copy an arc map
     456  ///  OrigGraph::ArcMap<double> oamap(orig_graph);
     457  ///  NewGraph::ArcMap<double> namap(new_graph);
     458  ///  dc.arcMap(namap, oamap);
     459  ///  // copy a node
     460  ///  OrigGraph::Node on;
     461  ///  NewGraph::Node nn;
     462  ///  dc.node(nn, on);
     463  ///  // Executions of copy
     464  ///  dc.run();
     465  ///\endcode
     466  template <typename To, typename From>
     467  class DigraphCopy {
     468  private:
     469
     470    typedef typename From::Node Node;
     471    typedef typename From::NodeIt NodeIt;
     472    typedef typename From::Arc Arc;
     473    typedef typename From::ArcIt ArcIt;
     474
     475    typedef typename To::Node TNode;
     476    typedef typename To::Arc TArc;
     477
     478    typedef typename From::template NodeMap<TNode> NodeRefMap;
     479    typedef typename From::template ArcMap<TArc> ArcRefMap;
     480
     481
     482  public:
     483
     484
     485    /// \brief Constructor for the DigraphCopy.
     486    ///
     487    /// It copies the content of the \c _from digraph into the
     488    /// \c _to digraph.
     489    DigraphCopy(To& to, const From& from)
     490      : _from(from), _to(to) {}
     491
     492    /// \brief Destructor of the DigraphCopy
     493    ///
     494    /// Destructor of the DigraphCopy
     495    ~DigraphCopy() {
     496      for (int i = 0; i < int(_node_maps.size()); ++i) {
     497        delete _node_maps[i];
     498      }
     499      for (int i = 0; i < int(_arc_maps.size()); ++i) {
     500        delete _arc_maps[i];
     501      }
     502
     503    }
     504
     505    /// \brief Copies the node references into the given map.
     506    ///
     507    /// Copies the node references into the given map. The parameter
     508    /// should be a map, which key type is the Node type of the source
     509    /// graph, while the value type is the Node type of the
     510    /// destination graph.
     511    template <typename NodeRef>
     512    DigraphCopy& nodeRef(NodeRef& map) {
     513      _node_maps.push_back(new _core_bits::RefCopy<From, Node,
     514                           NodeRefMap, NodeRef>(map));
     515      return *this;
     516    }
     517
     518    /// \brief Copies the node cross references into the given map.
     519    ///
     520    ///  Copies the node cross references (reverse references) into
     521    ///  the given map. The parameter should be a map, which key type
     522    ///  is the Node type of the destination graph, while the value type is
     523    ///  the Node type of the source graph.
     524    template <typename NodeCrossRef>
     525    DigraphCopy& nodeCrossRef(NodeCrossRef& map) {
     526      _node_maps.push_back(new _core_bits::CrossRefCopy<From, Node,
     527                           NodeRefMap, NodeCrossRef>(map));
     528      return *this;
     529    }
     530
     531    /// \brief Make copy of the given map.
     532    ///
     533    /// Makes copy of the given map for the newly created digraph.
     534    /// The new map's key type is the destination graph's node type,
     535    /// and the copied map's key type is the source graph's node type.
     536    template <typename ToMap, typename FromMap>
     537    DigraphCopy& nodeMap(ToMap& tmap, const FromMap& map) {
     538      _node_maps.push_back(new _core_bits::MapCopy<From, Node,
     539                           NodeRefMap, ToMap, FromMap>(tmap, map));
     540      return *this;
     541    }
     542
     543    /// \brief Make a copy of the given node.
     544    ///
     545    /// Make a copy of the given node.
     546    DigraphCopy& node(TNode& tnode, const Node& snode) {
     547      _node_maps.push_back(new _core_bits::ItemCopy<From, Node,
     548                           NodeRefMap, TNode>(tnode, snode));
     549      return *this;
     550    }
     551
     552    /// \brief Copies the arc references into the given map.
     553    ///
     554    /// Copies the arc references into the given map.
     555    template <typename ArcRef>
     556    DigraphCopy& arcRef(ArcRef& map) {
     557      _arc_maps.push_back(new _core_bits::RefCopy<From, Arc,
     558                          ArcRefMap, ArcRef>(map));
     559      return *this;
     560    }
     561
     562    /// \brief Copies the arc cross references into the given map.
     563    ///
     564    ///  Copies the arc cross references (reverse references) into
     565    ///  the given map.
     566    template <typename ArcCrossRef>
     567    DigraphCopy& arcCrossRef(ArcCrossRef& map) {
     568      _arc_maps.push_back(new _core_bits::CrossRefCopy<From, Arc,
     569                          ArcRefMap, ArcCrossRef>(map));
     570      return *this;
     571    }
     572
     573    /// \brief Make copy of the given map.
     574    ///
     575    /// Makes copy of the given map for the newly created digraph.
     576    /// The new map's key type is the to digraph's arc type,
     577    /// and the copied map's key type is the from digraph's arc
     578    /// type.
     579    template <typename ToMap, typename FromMap>
     580    DigraphCopy& arcMap(ToMap& tmap, const FromMap& map) {
     581      _arc_maps.push_back(new _core_bits::MapCopy<From, Arc,
     582                          ArcRefMap, ToMap, FromMap>(tmap, map));
     583      return *this;
     584    }
     585
     586    /// \brief Make a copy of the given arc.
     587    ///
     588    /// Make a copy of the given arc.
     589    DigraphCopy& arc(TArc& tarc, const Arc& sarc) {
     590      _arc_maps.push_back(new _core_bits::ItemCopy<From, Arc,
     591                          ArcRefMap, TArc>(tarc, sarc));
     592      return *this;
     593    }
     594
     595    /// \brief Executes the copies.
     596    ///
     597    /// Executes the copies.
     598    void run() {
     599      NodeRefMap nodeRefMap(_from);
     600      ArcRefMap arcRefMap(_from);
     601      _core_bits::DigraphCopySelector<To>::
     602        copy(_to, _from, nodeRefMap, arcRefMap);
     603      for (int i = 0; i < int(_node_maps.size()); ++i) {
     604        _node_maps[i]->copy(_from, nodeRefMap);
     605      }
     606      for (int i = 0; i < int(_arc_maps.size()); ++i) {
     607        _arc_maps[i]->copy(_from, arcRefMap);
     608      }
     609    }
     610
     611  protected:
     612
     613
     614    const From& _from;
     615    To& _to;
     616
     617    std::vector<_core_bits::MapCopyBase<From, Node, NodeRefMap>* >
     618    _node_maps;
     619
     620    std::vector<_core_bits::MapCopyBase<From, Arc, ArcRefMap>* >
     621    _arc_maps;
     622
     623  };
     624
     625  /// \brief Copy a digraph to another digraph.
     626  ///
     627  /// Copy a digraph to another digraph. The complete usage of the
     628  /// function is detailed in the DigraphCopy class, but a short
     629  /// example shows a basic work:
     630  ///\code
     631  /// copyDigraph(trg, src).nodeRef(nr).arcCrossRef(ecr).run();
     632  ///\endcode
     633  ///
     634  /// After the copy the \c nr map will contain the mapping from the
     635  /// nodes of the \c from digraph to the nodes of the \c to digraph and
     636  /// \c ecr will contain the mapping from the arcs of the \c to digraph
     637  /// to the arcs of the \c from digraph.
     638  ///
     639  /// \see DigraphCopy
     640  template <typename To, typename From>
     641  DigraphCopy<To, From> copyDigraph(To& to, const From& from) {
     642    return DigraphCopy<To, From>(to, from);
     643  }
     644
     645  /// \brief Class to copy a graph.
     646  ///
     647  /// Class to copy a graph to another graph (duplicate a graph). The
     648  /// simplest way of using it is through the \c copyGraph() function.
     649  ///
     650  /// This class not just make a copy of a graph, but it can create
     651  /// references and cross references between the nodes, edges and arcs of
     652  /// the two graphs, it can copy maps for use with the newly created
     653  /// graph and copy nodes, edges and arcs.
     654  ///
     655  /// To make a copy from a graph, first an instance of GraphCopy
     656  /// should be created, then the data belongs to the graph should
     657  /// assigned to copy. In the end, the \c run() member should be
     658  /// called.
     659  ///
     660  /// The next code copies a graph with several data:
     661  ///\code
     662  ///  GraphCopy<NewGraph, OrigGraph> dc(new_graph, orig_graph);
     663  ///  // create a reference for the nodes
     664  ///  OrigGraph::NodeMap<NewGraph::Node> nr(orig_graph);
     665  ///  dc.nodeRef(nr);
     666  ///  // create a cross reference (inverse) for the edges
     667  ///  NewGraph::EdgeMap<OrigGraph::Arc> ecr(new_graph);
     668  ///  dc.edgeCrossRef(ecr);
     669  ///  // copy an arc map
     670  ///  OrigGraph::ArcMap<double> oamap(orig_graph);
     671  ///  NewGraph::ArcMap<double> namap(new_graph);
     672  ///  dc.arcMap(namap, oamap);
     673  ///  // copy a node
     674  ///  OrigGraph::Node on;
     675  ///  NewGraph::Node nn;
     676  ///  dc.node(nn, on);
     677  ///  // Executions of copy
     678  ///  dc.run();
     679  ///\endcode
     680  template <typename To, typename From>
     681  class GraphCopy {
     682  private:
     683
     684    typedef typename From::Node Node;
     685    typedef typename From::NodeIt NodeIt;
     686    typedef typename From::Arc Arc;
     687    typedef typename From::ArcIt ArcIt;
     688    typedef typename From::Edge Edge;
     689    typedef typename From::EdgeIt EdgeIt;
     690
     691    typedef typename To::Node TNode;
     692    typedef typename To::Arc TArc;
     693    typedef typename To::Edge TEdge;
     694
     695    typedef typename From::template NodeMap<TNode> NodeRefMap;
     696    typedef typename From::template EdgeMap<TEdge> EdgeRefMap;
     697
     698    struct ArcRefMap {
     699      ArcRefMap(const To& to, const From& from,
     700                const EdgeRefMap& edge_ref, const NodeRefMap& node_ref)
     701        : _to(to), _from(from),
     702          _edge_ref(edge_ref), _node_ref(node_ref) {}
     703
     704      typedef typename From::Arc Key;
     705      typedef typename To::Arc Value;
     706
     707      Value operator[](const Key& key) const {
     708        bool forward = _from.u(key) != _from.v(key) ?
     709          _node_ref[_from.source(key)] ==
     710          _to.source(_to.direct(_edge_ref[key], true)) :
     711          _from.direction(key);
     712        return _to.direct(_edge_ref[key], forward);
     713      }
     714
     715      const To& _to;
     716      const From& _from;
     717      const EdgeRefMap& _edge_ref;
     718      const NodeRefMap& _node_ref;
     719    };
     720
     721
     722  public:
     723
     724
     725    /// \brief Constructor for the GraphCopy.
     726    ///
     727    /// It copies the content of the \c _from graph into the
     728    /// \c _to graph.
     729    GraphCopy(To& to, const From& from)
     730      : _from(from), _to(to) {}
     731
     732    /// \brief Destructor of the GraphCopy
     733    ///
     734    /// Destructor of the GraphCopy
     735    ~GraphCopy() {
     736      for (int i = 0; i < int(_node_maps.size()); ++i) {
     737        delete _node_maps[i];
     738      }
     739      for (int i = 0; i < int(_arc_maps.size()); ++i) {
     740        delete _arc_maps[i];
     741      }
     742      for (int i = 0; i < int(_edge_maps.size()); ++i) {
     743        delete _edge_maps[i];
     744      }
     745
     746    }
     747
     748    /// \brief Copies the node references into the given map.
     749    ///
     750    /// Copies the node references into the given map.
     751    template <typename NodeRef>
     752    GraphCopy& nodeRef(NodeRef& map) {
     753      _node_maps.push_back(new _core_bits::RefCopy<From, Node,
     754                           NodeRefMap, NodeRef>(map));
     755      return *this;
     756    }
     757
     758    /// \brief Copies the node cross references into the given map.
     759    ///
     760    ///  Copies the node cross references (reverse references) into
     761    ///  the given map.
     762    template <typename NodeCrossRef>
     763    GraphCopy& nodeCrossRef(NodeCrossRef& map) {
     764      _node_maps.push_back(new _core_bits::CrossRefCopy<From, Node,
     765                           NodeRefMap, NodeCrossRef>(map));
     766      return *this;
     767    }
     768
     769    /// \brief Make copy of the given map.
     770    ///
     771    /// Makes copy of the given map for the newly created graph.
     772    /// The new map's key type is the to graph's node type,
     773    /// and the copied map's key type is the from graph's node
     774    /// type.
     775    template <typename ToMap, typename FromMap>
     776    GraphCopy& nodeMap(ToMap& tmap, const FromMap& map) {
     777      _node_maps.push_back(new _core_bits::MapCopy<From, Node,
     778                           NodeRefMap, ToMap, FromMap>(tmap, map));
     779      return *this;
     780    }
     781
     782    /// \brief Make a copy of the given node.
     783    ///
     784    /// Make a copy of the given node.
     785    GraphCopy& node(TNode& tnode, const Node& snode) {
     786      _node_maps.push_back(new _core_bits::ItemCopy<From, Node,
     787                           NodeRefMap, TNode>(tnode, snode));
     788      return *this;
     789    }
     790
     791    /// \brief Copies the arc references into the given map.
     792    ///
     793    /// Copies the arc references into the given map.
     794    template <typename ArcRef>
     795    GraphCopy& arcRef(ArcRef& map) {
     796      _arc_maps.push_back(new _core_bits::RefCopy<From, Arc,
     797                          ArcRefMap, ArcRef>(map));
     798      return *this;
     799    }
     800
     801    /// \brief Copies the arc cross references into the given map.
     802    ///
     803    ///  Copies the arc cross references (reverse references) into
     804    ///  the given map.
     805    template <typename ArcCrossRef>
     806    GraphCopy& arcCrossRef(ArcCrossRef& map) {
     807      _arc_maps.push_back(new _core_bits::CrossRefCopy<From, Arc,
     808                          ArcRefMap, ArcCrossRef>(map));
     809      return *this;
     810    }
     811
     812    /// \brief Make copy of the given map.
     813    ///
     814    /// Makes copy of the given map for the newly created graph.
     815    /// The new map's key type is the to graph's arc type,
     816    /// and the copied map's key type is the from graph's arc
     817    /// type.
     818    template <typename ToMap, typename FromMap>
     819    GraphCopy& arcMap(ToMap& tmap, const FromMap& map) {
     820      _arc_maps.push_back(new _core_bits::MapCopy<From, Arc,
     821                          ArcRefMap, ToMap, FromMap>(tmap, map));
     822      return *this;
     823    }
     824
     825    /// \brief Make a copy of the given arc.
     826    ///
     827    /// Make a copy of the given arc.
     828    GraphCopy& arc(TArc& tarc, const Arc& sarc) {
     829      _arc_maps.push_back(new _core_bits::ItemCopy<From, Arc,
     830                          ArcRefMap, TArc>(tarc, sarc));
     831      return *this;
     832    }
     833
     834    /// \brief Copies the edge references into the given map.
     835    ///
     836    /// Copies the edge references into the given map.
     837    template <typename EdgeRef>
     838    GraphCopy& edgeRef(EdgeRef& map) {
     839      _edge_maps.push_back(new _core_bits::RefCopy<From, Edge,
     840                           EdgeRefMap, EdgeRef>(map));
     841      return *this;
     842    }
     843
     844    /// \brief Copies the edge cross references into the given map.
     845    ///
     846    /// Copies the edge cross references (reverse
     847    /// references) into the given map.
     848    template <typename EdgeCrossRef>
     849    GraphCopy& edgeCrossRef(EdgeCrossRef& map) {
     850      _edge_maps.push_back(new _core_bits::CrossRefCopy<From,
     851                           Edge, EdgeRefMap, EdgeCrossRef>(map));
     852      return *this;
     853    }
     854
     855    /// \brief Make copy of the given map.
     856    ///
     857    /// Makes copy of the given map for the newly created graph.
     858    /// The new map's key type is the to graph's edge type,
     859    /// and the copied map's key type is the from graph's edge
     860    /// type.
     861    template <typename ToMap, typename FromMap>
     862    GraphCopy& edgeMap(ToMap& tmap, const FromMap& map) {
     863      _edge_maps.push_back(new _core_bits::MapCopy<From, Edge,
     864                           EdgeRefMap, ToMap, FromMap>(tmap, map));
     865      return *this;
     866    }
     867
     868    /// \brief Make a copy of the given edge.
     869    ///
     870    /// Make a copy of the given edge.
     871    GraphCopy& edge(TEdge& tedge, const Edge& sedge) {
     872      _edge_maps.push_back(new _core_bits::ItemCopy<From, Edge,
     873                           EdgeRefMap, TEdge>(tedge, sedge));
     874      return *this;
     875    }
     876
     877    /// \brief Executes the copies.
     878    ///
     879    /// Executes the copies.
     880    void run() {
     881      NodeRefMap nodeRefMap(_from);
     882      EdgeRefMap edgeRefMap(_from);
     883      ArcRefMap arcRefMap(_to, _from, edgeRefMap, nodeRefMap);
     884      _core_bits::GraphCopySelector<To>::
     885        copy(_to, _from, nodeRefMap, edgeRefMap);
     886      for (int i = 0; i < int(_node_maps.size()); ++i) {
     887        _node_maps[i]->copy(_from, nodeRefMap);
     888      }
     889      for (int i = 0; i < int(_edge_maps.size()); ++i) {
     890        _edge_maps[i]->copy(_from, edgeRefMap);
     891      }
     892      for (int i = 0; i < int(_arc_maps.size()); ++i) {
     893        _arc_maps[i]->copy(_from, arcRefMap);
     894      }
     895    }
     896
     897  private:
     898
     899    const From& _from;
     900    To& _to;
     901
     902    std::vector<_core_bits::MapCopyBase<From, Node, NodeRefMap>* >
     903    _node_maps;
     904
     905    std::vector<_core_bits::MapCopyBase<From, Arc, ArcRefMap>* >
     906    _arc_maps;
     907
     908    std::vector<_core_bits::MapCopyBase<From, Edge, EdgeRefMap>* >
     909    _edge_maps;
     910
     911  };
     912
     913  /// \brief Copy a graph to another graph.
     914  ///
     915  /// Copy a graph to another graph. The complete usage of the
     916  /// function is detailed in the GraphCopy class, but a short
     917  /// example shows a basic work:
     918  ///\code
     919  /// copyGraph(trg, src).nodeRef(nr).arcCrossRef(ecr).run();
     920  ///\endcode
     921  ///
     922  /// After the copy the \c nr map will contain the mapping from the
     923  /// nodes of the \c from graph to the nodes of the \c to graph and
     924  /// \c ecr will contain the mapping from the arcs of the \c to graph
     925  /// to the arcs of the \c from graph.
     926  ///
     927  /// \see GraphCopy
     928  template <typename To, typename From>
     929  GraphCopy<To, From>
     930  copyGraph(To& to, const From& from) {
     931    return GraphCopy<To, From>(to, from);
     932  }
     933
     934  namespace _core_bits {
     935
     936    template <typename Graph, typename Enable = void>
     937    struct FindArcSelector {
     938      typedef typename Graph::Node Node;
     939      typedef typename Graph::Arc Arc;
     940      static Arc find(const Graph &g, Node u, Node v, Arc e) {
     941        if (e == INVALID) {
     942          g.firstOut(e, u);
     943        } else {
     944          g.nextOut(e);
     945        }
     946        while (e != INVALID && g.target(e) != v) {
     947          g.nextOut(e);
     948        }
     949        return e;
     950      }
     951    };
     952
     953    template <typename Graph>
     954    struct FindArcSelector<
     955      Graph,
     956      typename enable_if<typename Graph::FindEdgeTag, void>::type>
     957    {
     958      typedef typename Graph::Node Node;
     959      typedef typename Graph::Arc Arc;
     960      static Arc find(const Graph &g, Node u, Node v, Arc prev) {
     961        return g.findArc(u, v, prev);
     962      }
     963    };
     964  }
     965
     966  /// \brief Finds an arc between two nodes of a graph.
     967  ///
     968  /// Finds an arc from node \c u to node \c v in graph \c g.
     969  ///
     970  /// If \c prev is \ref INVALID (this is the default value), then
     971  /// it finds the first arc from \c u to \c v. Otherwise it looks for
     972  /// the next arc from \c u to \c v after \c prev.
     973  /// \return The found arc or \ref INVALID if there is no such an arc.
     974  ///
     975  /// Thus you can iterate through each arc from \c u to \c v as it follows.
     976  ///\code
     977  /// for(Arc e=findArc(g,u,v);e!=INVALID;e=findArc(g,u,v,e)) {
     978  ///   ...
     979  /// }
     980  ///\endcode
     981  ///
     982  ///\sa ArcLookUp
     983  ///\sa AllArcLookUp
     984  ///\sa DynArcLookUp
     985  ///\sa ConArcIt
     986  template <typename Graph>
     987  inline typename Graph::Arc
     988  findArc(const Graph &g, typename Graph::Node u, typename Graph::Node v,
     989          typename Graph::Arc prev = INVALID) {
     990    return _core_bits::FindArcSelector<Graph>::find(g, u, v, prev);
     991  }
     992
     993  /// \brief Iterator for iterating on arcs connected the same nodes.
     994  ///
     995  /// Iterator for iterating on arcs connected the same nodes. It is
     996  /// higher level interface for the findArc() function. You can
     997  /// use it the following way:
     998  ///\code
     999  /// for (ConArcIt<Graph> it(g, src, trg); it != INVALID; ++it) {
     1000  ///   ...
     1001  /// }
     1002  ///\endcode
     1003  ///
     1004  ///\sa findArc()
     1005  ///\sa ArcLookUp
     1006  ///\sa AllArcLookUp
     1007  ///\sa DynArcLookUp
     1008  template <typename _Graph>
     1009  class ConArcIt : public _Graph::Arc {
     1010  public:
     1011
     1012    typedef _Graph Graph;
     1013    typedef typename Graph::Arc Parent;
     1014
     1015    typedef typename Graph::Arc Arc;
     1016    typedef typename Graph::Node Node;
     1017
     1018    /// \brief Constructor.
     1019    ///
     1020    /// Construct a new ConArcIt iterating on the arcs which
     1021    /// connects the \c u and \c v node.
     1022    ConArcIt(const Graph& g, Node u, Node v) : _graph(g) {
     1023      Parent::operator=(findArc(_graph, u, v));
     1024    }
     1025
     1026    /// \brief Constructor.
     1027    ///
     1028    /// Construct a new ConArcIt which continues the iterating from
     1029    /// the \c e arc.
     1030    ConArcIt(const Graph& g, Arc a) : Parent(a), _graph(g) {}
     1031
     1032    /// \brief Increment operator.
     1033    ///
     1034    /// It increments the iterator and gives back the next arc.
     1035    ConArcIt& operator++() {
     1036      Parent::operator=(findArc(_graph, _graph.source(*this),
     1037                                _graph.target(*this), *this));
     1038      return *this;
     1039    }
     1040  private:
     1041    const Graph& _graph;
     1042  };
     1043
     1044  namespace _core_bits {
     1045
     1046    template <typename Graph, typename Enable = void>
     1047    struct FindEdgeSelector {
     1048      typedef typename Graph::Node Node;
     1049      typedef typename Graph::Edge Edge;
     1050      static Edge find(const Graph &g, Node u, Node v, Edge e) {
     1051        bool b;
     1052        if (u != v) {
     1053          if (e == INVALID) {
     1054            g.firstInc(e, b, u);
     1055          } else {
     1056            b = g.u(e) == u;
     1057            g.nextInc(e, b);
     1058          }
     1059          while (e != INVALID && (b ? g.v(e) : g.u(e)) != v) {
     1060            g.nextInc(e, b);
     1061          }
     1062        } else {
     1063          if (e == INVALID) {
     1064            g.firstInc(e, b, u);
     1065          } else {
     1066            b = true;
     1067            g.nextInc(e, b);
     1068          }
     1069          while (e != INVALID && (!b || g.v(e) != v)) {
     1070            g.nextInc(e, b);
     1071          }
     1072        }
     1073        return e;
     1074      }
     1075    };
     1076
     1077    template <typename Graph>
     1078    struct FindEdgeSelector<
     1079      Graph,
     1080      typename enable_if<typename Graph::FindEdgeTag, void>::type>
     1081    {
     1082      typedef typename Graph::Node Node;
     1083      typedef typename Graph::Edge Edge;
     1084      static Edge find(const Graph &g, Node u, Node v, Edge prev) {
     1085        return g.findEdge(u, v, prev);
     1086      }
     1087    };
     1088  }
     1089
     1090  /// \brief Finds an edge between two nodes of a graph.
     1091  ///
     1092  /// Finds an edge from node \c u to node \c v in graph \c g.
     1093  /// If the node \c u and node \c v is equal then each loop edge
     1094  /// will be enumerated once.
     1095  ///
     1096  /// If \c prev is \ref INVALID (this is the default value), then
     1097  /// it finds the first arc from \c u to \c v. Otherwise it looks for
     1098  /// the next arc from \c u to \c v after \c prev.
     1099  /// \return The found arc or \ref INVALID if there is no such an arc.
     1100  ///
     1101  /// Thus you can iterate through each arc from \c u to \c v as it follows.
     1102  ///\code
     1103  /// for(Edge e = findEdge(g,u,v); e != INVALID;
     1104  ///     e = findEdge(g,u,v,e)) {
     1105  ///   ...
     1106  /// }
     1107  ///\endcode
     1108  ///
     1109  ///\sa ConEdgeIt
     1110
     1111  template <typename Graph>
     1112  inline typename Graph::Edge
     1113  findEdge(const Graph &g, typename Graph::Node u, typename Graph::Node v,
     1114            typename Graph::Edge p = INVALID) {
     1115    return _core_bits::FindEdgeSelector<Graph>::find(g, u, v, p);
     1116  }
     1117
     1118  /// \brief Iterator for iterating on edges connected the same nodes.
     1119  ///
     1120  /// Iterator for iterating on edges connected the same nodes. It is
     1121  /// higher level interface for the findEdge() function. You can
     1122  /// use it the following way:
     1123  ///\code
     1124  /// for (ConEdgeIt<Graph> it(g, src, trg); it != INVALID; ++it) {
     1125  ///   ...
     1126  /// }
     1127  ///\endcode
     1128  ///
     1129  ///\sa findEdge()
     1130  template <typename _Graph>
     1131  class ConEdgeIt : public _Graph::Edge {
     1132  public:
     1133
     1134    typedef _Graph Graph;
     1135    typedef typename Graph::Edge Parent;
     1136
     1137    typedef typename Graph::Edge Edge;
     1138    typedef typename Graph::Node Node;
     1139
     1140    /// \brief Constructor.
     1141    ///
     1142    /// Construct a new ConEdgeIt iterating on the edges which
     1143    /// connects the \c u and \c v node.
     1144    ConEdgeIt(const Graph& g, Node u, Node v) : _graph(g) {
     1145      Parent::operator=(findEdge(_graph, u, v));
     1146    }
     1147
     1148    /// \brief Constructor.
     1149    ///
     1150    /// Construct a new ConEdgeIt which continues the iterating from
     1151    /// the \c e edge.
     1152    ConEdgeIt(const Graph& g, Edge e) : Parent(e), _graph(g) {}
     1153
     1154    /// \brief Increment operator.
     1155    ///
     1156    /// It increments the iterator and gives back the next edge.
     1157    ConEdgeIt& operator++() {
     1158      Parent::operator=(findEdge(_graph, _graph.u(*this),
     1159                                 _graph.v(*this), *this));
     1160      return *this;
     1161    }
     1162  private:
     1163    const Graph& _graph;
     1164  };
     1165
     1166
     1167  ///Dynamic arc look up between given endpoints.
     1168
     1169  ///Using this class, you can find an arc in a digraph from a given
     1170  ///source to a given target in amortized time <em>O(log d)</em>,
     1171  ///where <em>d</em> is the out-degree of the source node.
     1172  ///
     1173  ///It is possible to find \e all parallel arcs between two nodes with
     1174  ///the \c findFirst() and \c findNext() members.
     1175  ///
     1176  ///See the \ref ArcLookUp and \ref AllArcLookUp classes if your
     1177  ///digraph is not changed so frequently.
     1178  ///
     1179  ///This class uses a self-adjusting binary search tree, Sleator's
     1180  ///and Tarjan's Splay tree for guarantee the logarithmic amortized
     1181  ///time bound for arc lookups. This class also guarantees the
     1182  ///optimal time bound in a constant factor for any distribution of
     1183  ///queries.
     1184  ///
     1185  ///\tparam G The type of the underlying digraph.
     1186  ///
     1187  ///\sa ArcLookUp
     1188  ///\sa AllArcLookUp
     1189  template<class G>
     1190  class DynArcLookUp
     1191    : protected ItemSetTraits<G, typename G::Arc>::ItemNotifier::ObserverBase
     1192  {
     1193  public:
     1194    typedef typename ItemSetTraits<G, typename G::Arc>
     1195    ::ItemNotifier::ObserverBase Parent;
     1196
     1197    TEMPLATE_DIGRAPH_TYPEDEFS(G);
     1198    typedef G Digraph;
     1199
     1200  protected:
     1201
     1202    class AutoNodeMap : public ItemSetTraits<G, Node>::template Map<Arc>::Type {
     1203    public:
     1204
     1205      typedef typename ItemSetTraits<G, Node>::template Map<Arc>::Type Parent;
     1206
     1207      AutoNodeMap(const G& digraph) : Parent(digraph, INVALID) {}
     1208
     1209      virtual void add(const Node& node) {
     1210        Parent::add(node);
     1211        Parent::set(node, INVALID);
     1212      }
     1213
     1214      virtual void add(const std::vector<Node>& nodes) {
     1215        Parent::add(nodes);
     1216        for (int i = 0; i < int(nodes.size()); ++i) {
     1217          Parent::set(nodes[i], INVALID);
     1218        }
     1219      }
     1220
     1221      virtual void build() {
     1222        Parent::build();
     1223        Node it;
     1224        typename Parent::Notifier* nf = Parent::notifier();
     1225        for (nf->first(it); it != INVALID; nf->next(it)) {
     1226          Parent::set(it, INVALID);
     1227        }
     1228      }
     1229    };
     1230
     1231    const Digraph &_g;
     1232    AutoNodeMap _head;
     1233    typename Digraph::template ArcMap<Arc> _parent;
     1234    typename Digraph::template ArcMap<Arc> _left;
     1235    typename Digraph::template ArcMap<Arc> _right;
     1236
     1237    class ArcLess {
     1238      const Digraph &g;
     1239    public:
     1240      ArcLess(const Digraph &_g) : g(_g) {}
     1241      bool operator()(Arc a,Arc b) const
     1242      {
     1243        return g.target(a)<g.target(b);
     1244      }
     1245    };
     1246
     1247  public:
     1248
     1249    ///Constructor
     1250
     1251    ///Constructor.
     1252    ///
     1253    ///It builds up the search database.
     1254    DynArcLookUp(const Digraph &g)
     1255      : _g(g),_head(g),_parent(g),_left(g),_right(g)
     1256    {
     1257      Parent::attach(_g.notifier(typename Digraph::Arc()));
     1258      refresh();
     1259    }
     1260
     1261  protected:
     1262
     1263    virtual void add(const Arc& arc) {
     1264      insert(arc);
     1265    }
     1266
     1267    virtual void add(const std::vector<Arc>& arcs) {
     1268      for (int i = 0; i < int(arcs.size()); ++i) {
     1269        insert(arcs[i]);
     1270      }
     1271    }
     1272
     1273    virtual void erase(const Arc& arc) {
     1274      remove(arc);
     1275    }
     1276
     1277    virtual void erase(const std::vector<Arc>& arcs) {
     1278      for (int i = 0; i < int(arcs.size()); ++i) {
     1279        remove(arcs[i]);
     1280      }
     1281    }
     1282
     1283    virtual void build() {
     1284      refresh();
     1285    }
     1286
     1287    virtual void clear() {
     1288      for(NodeIt n(_g);n!=INVALID;++n) {
     1289        _head.set(n, INVALID);
     1290      }
     1291    }
     1292
     1293    void insert(Arc arc) {
     1294      Node s = _g.source(arc);
     1295      Node t = _g.target(arc);
     1296      _left.set(arc, INVALID);
     1297      _right.set(arc, INVALID);
     1298
     1299      Arc e = _head[s];
     1300      if (e == INVALID) {
     1301        _head.set(s, arc);
     1302        _parent.set(arc, INVALID);
     1303        return;
     1304      }
     1305      while (true) {
     1306        if (t < _g.target(e)) {
     1307          if (_left[e] == INVALID) {
     1308            _left.set(e, arc);
     1309            _parent.set(arc, e);
     1310            splay(arc);
     1311            return;
     1312          } else {
     1313            e = _left[e];
     1314          }
     1315        } else {
     1316          if (_right[e] == INVALID) {
     1317            _right.set(e, arc);
     1318            _parent.set(arc, e);
     1319            splay(arc);
     1320            return;
     1321          } else {
     1322            e = _right[e];
     1323          }
     1324        }
     1325      }
     1326    }
     1327
     1328    void remove(Arc arc) {
     1329      if (_left[arc] == INVALID) {
     1330        if (_right[arc] != INVALID) {
     1331          _parent.set(_right[arc], _parent[arc]);
     1332        }
     1333        if (_parent[arc] != INVALID) {
     1334          if (_left[_parent[arc]] == arc) {
     1335            _left.set(_parent[arc], _right[arc]);
     1336          } else {
     1337            _right.set(_parent[arc], _right[arc]);
     1338          }
     1339        } else {
     1340          _head.set(_g.source(arc), _right[arc]);
     1341        }
     1342      } else if (_right[arc] == INVALID) {
     1343        _parent.set(_left[arc], _parent[arc]);
     1344        if (_parent[arc] != INVALID) {
     1345          if (_left[_parent[arc]] == arc) {
     1346            _left.set(_parent[arc], _left[arc]);
     1347          } else {
     1348            _right.set(_parent[arc], _left[arc]);
     1349          }
     1350        } else {
     1351          _head.set(_g.source(arc), _left[arc]);
     1352        }
     1353      } else {
     1354        Arc e = _left[arc];
     1355        if (_right[e] != INVALID) {
     1356          e = _right[e];
     1357          while (_right[e] != INVALID) {
     1358            e = _right[e];
     1359          }
     1360          Arc s = _parent[e];
     1361          _right.set(_parent[e], _left[e]);
     1362          if (_left[e] != INVALID) {
     1363            _parent.set(_left[e], _parent[e]);
     1364          }
     1365
     1366          _left.set(e, _left[arc]);
     1367          _parent.set(_left[arc], e);
     1368          _right.set(e, _right[arc]);
     1369          _parent.set(_right[arc], e);
     1370
     1371          _parent.set(e, _parent[arc]);
     1372          if (_parent[arc] != INVALID) {
     1373            if (_left[_parent[arc]] == arc) {
     1374              _left.set(_parent[arc], e);
     1375            } else {
     1376              _right.set(_parent[arc], e);
     1377            }
     1378          }
     1379          splay(s);
     1380        } else {
     1381          _right.set(e, _right[arc]);
     1382          _parent.set(_right[arc], e);
     1383
     1384          if (_parent[arc] != INVALID) {
     1385            if (_left[_parent[arc]] == arc) {
     1386              _left.set(_parent[arc], e);
     1387            } else {
     1388              _right.set(_parent[arc], e);
     1389            }
     1390          } else {
     1391            _head.set(_g.source(arc), e);
     1392          }
     1393        }
     1394      }
     1395    }
     1396
     1397    Arc refreshRec(std::vector<Arc> &v,int a,int b)
     1398    {
     1399      int m=(a+b)/2;
     1400      Arc me=v[m];
     1401      if (a < m) {
     1402        Arc left = refreshRec(v,a,m-1);
     1403        _left.set(me, left);
     1404        _parent.set(left, me);
     1405      } else {
     1406        _left.set(me, INVALID);
     1407      }
     1408      if (m < b) {
     1409        Arc right = refreshRec(v,m+1,b);
     1410        _right.set(me, right);
     1411        _parent.set(right, me);
     1412      } else {
     1413        _right.set(me, INVALID);
     1414      }
     1415      return me;
     1416    }
     1417
     1418    void refresh() {
     1419      for(NodeIt n(_g);n!=INVALID;++n) {
     1420        std::vector<Arc> v;
     1421        for(OutArcIt e(_g,n);e!=INVALID;++e) v.push_back(e);
     1422        if(v.size()) {
     1423          std::sort(v.begin(),v.end(),ArcLess(_g));
     1424          Arc head = refreshRec(v,0,v.size()-1);
     1425          _head.set(n, head);
     1426          _parent.set(head, INVALID);
     1427        }
     1428        else _head.set(n, INVALID);
     1429      }
     1430    }
     1431
     1432    void zig(Arc v) {
     1433      Arc w = _parent[v];
     1434      _parent.set(v, _parent[w]);
     1435      _parent.set(w, v);
     1436      _left.set(w, _right[v]);
     1437      _right.set(v, w);
     1438      if (_parent[v] != INVALID) {
     1439        if (_right[_parent[v]] == w) {
     1440          _right.set(_parent[v], v);
     1441        } else {
     1442          _left.set(_parent[v], v);
     1443        }
     1444      }
     1445      if (_left[w] != INVALID){
     1446        _parent.set(_left[w], w);
     1447      }
     1448    }
     1449
     1450    void zag(Arc v) {
     1451      Arc w = _parent[v];
     1452      _parent.set(v, _parent[w]);
     1453      _parent.set(w, v);
     1454      _right.set(w, _left[v]);
     1455      _left.set(v, w);
     1456      if (_parent[v] != INVALID){
     1457        if (_left[_parent[v]] == w) {
     1458          _left.set(_parent[v], v);
     1459        } else {
     1460          _right.set(_parent[v], v);
     1461        }
     1462      }
     1463      if (_right[w] != INVALID){
     1464        _parent.set(_right[w], w);
     1465      }
     1466    }
     1467
     1468    void splay(Arc v) {
     1469      while (_parent[v] != INVALID) {
     1470        if (v == _left[_parent[v]]) {
     1471          if (_parent[_parent[v]] == INVALID) {
     1472            zig(v);
     1473          } else {
     1474            if (_parent[v] == _left[_parent[_parent[v]]]) {
     1475              zig(_parent[v]);
     1476              zig(v);
     1477            } else {
     1478              zig(v);
     1479              zag(v);
     1480            }
     1481          }
     1482        } else {
     1483          if (_parent[_parent[v]] == INVALID) {
     1484            zag(v);
     1485          } else {
     1486            if (_parent[v] == _left[_parent[_parent[v]]]) {
     1487              zag(v);
     1488              zig(v);
     1489            } else {
     1490              zag(_parent[v]);
     1491              zag(v);
     1492            }
     1493          }
     1494        }
     1495      }
     1496      _head[_g.source(v)] = v;
     1497    }
     1498
     1499
     1500  public:
     1501
     1502    ///Find an arc between two nodes.
     1503
     1504    ///Find an arc between two nodes in time <em>O(</em>log<em>d)</em>, where
     1505    /// <em>d</em> is the number of outgoing arcs of \c s.
     1506    ///\param s The source node
     1507    ///\param t The target node
     1508    ///\return An arc from \c s to \c t if there exists,
     1509    ///\ref INVALID otherwise.
     1510    Arc operator()(Node s, Node t) const
     1511    {
     1512      Arc a = _head[s];
     1513      while (true) {
     1514        if (_g.target(a) == t) {
     1515          const_cast<DynArcLookUp&>(*this).splay(a);
     1516          return a;
     1517        } else if (t < _g.target(a)) {
     1518          if (_left[a] == INVALID) {
     1519            const_cast<DynArcLookUp&>(*this).splay(a);
     1520            return INVALID;
     1521          } else {
     1522            a = _left[a];
     1523          }
     1524        } else  {
     1525          if (_right[a] == INVALID) {
     1526            const_cast<DynArcLookUp&>(*this).splay(a);
     1527            return INVALID;
     1528          } else {
     1529            a = _right[a];
     1530          }
     1531        }
     1532      }
     1533    }
     1534
     1535    ///Find the first arc between two nodes.
     1536
     1537    ///Find the first arc between two nodes in time
     1538    /// <em>O(</em>log<em>d)</em>, where <em>d</em> is the number of
     1539    /// outgoing arcs of \c s.
     1540    ///\param s The source node
     1541    ///\param t The target node
     1542    ///\return An arc from \c s to \c t if there exists, \ref INVALID
     1543    /// otherwise.
     1544    Arc findFirst(Node s, Node t) const
     1545    {
     1546      Arc a = _head[s];
     1547      Arc r = INVALID;
     1548      while (true) {
     1549        if (_g.target(a) < t) {
     1550          if (_right[a] == INVALID) {
     1551            const_cast<DynArcLookUp&>(*this).splay(a);
     1552            return r;
     1553          } else {
     1554            a = _right[a];
     1555          }
     1556        } else {
     1557          if (_g.target(a) == t) {
     1558            r = a;
     1559          }
     1560          if (_left[a] == INVALID) {
     1561            const_cast<DynArcLookUp&>(*this).splay(a);
     1562            return r;
     1563          } else {
     1564            a = _left[a];
     1565          }
     1566        }
     1567      }
     1568    }
     1569
     1570    ///Find the next arc between two nodes.
     1571
     1572    ///Find the next arc between two nodes in time
     1573    /// <em>O(</em>log<em>d)</em>, where <em>d</em> is the number of
     1574    /// outgoing arcs of \c s.
     1575    ///\param s The source node
     1576    ///\param t The target node
     1577    ///\return An arc from \c s to \c t if there exists, \ref INVALID
     1578    /// otherwise.
     1579
     1580    ///\note If \c e is not the result of the previous \c findFirst()
     1581    ///operation then the amorized time bound can not be guaranteed.
     1582#ifdef DOXYGEN
     1583    Arc findNext(Node s, Node t, Arc a) const
     1584#else
     1585    Arc findNext(Node, Node t, Arc a) const
     1586#endif
     1587    {
     1588      if (_right[a] != INVALID) {
     1589        a = _right[a];
     1590        while (_left[a] != INVALID) {
     1591          a = _left[a];
     1592        }
     1593        const_cast<DynArcLookUp&>(*this).splay(a);
     1594      } else {
     1595        while (_parent[a] != INVALID && _right[_parent[a]] ==  a) {
     1596          a = _parent[a];
     1597        }
     1598        if (_parent[a] == INVALID) {
     1599          return INVALID;
     1600        } else {
     1601          a = _parent[a];
     1602          const_cast<DynArcLookUp&>(*this).splay(a);
     1603        }
     1604      }
     1605      if (_g.target(a) == t) return a;
     1606      else return INVALID;
     1607    }
     1608
     1609  };
     1610
     1611  ///Fast arc look up between given endpoints.
     1612
     1613  ///Using this class, you can find an arc in a digraph from a given
     1614  ///source to a given target in time <em>O(log d)</em>,
     1615  ///where <em>d</em> is the out-degree of the source node.
     1616  ///
     1617  ///It is not possible to find \e all parallel arcs between two nodes.
     1618  ///Use \ref AllArcLookUp for this purpose.
     1619  ///
     1620  ///\warning This class is static, so you should refresh() (or at least
     1621  ///refresh(Node)) this data structure
     1622  ///whenever the digraph changes. This is a time consuming (superlinearly
     1623  ///proportional (<em>O(m</em>log<em>m)</em>) to the number of arcs).
     1624  ///
     1625  ///\tparam G The type of the underlying digraph.
     1626  ///
     1627  ///\sa DynArcLookUp
     1628  ///\sa AllArcLookUp
     1629  template<class G>
     1630  class ArcLookUp
     1631  {
     1632  public:
     1633    TEMPLATE_DIGRAPH_TYPEDEFS(G);
     1634    typedef G Digraph;
     1635
     1636  protected:
     1637    const Digraph &_g;
     1638    typename Digraph::template NodeMap<Arc> _head;
     1639    typename Digraph::template ArcMap<Arc> _left;
     1640    typename Digraph::template ArcMap<Arc> _right;
     1641
     1642    class ArcLess {
     1643      const Digraph &g;
     1644    public:
     1645      ArcLess(const Digraph &_g) : g(_g) {}
     1646      bool operator()(Arc a,Arc b) const
     1647      {
     1648        return g.target(a)<g.target(b);
     1649      }
     1650    };
     1651
     1652  public:
     1653
     1654    ///Constructor
     1655
     1656    ///Constructor.
     1657    ///
     1658    ///It builds up the search database, which remains valid until the digraph
     1659    ///changes.
     1660    ArcLookUp(const Digraph &g) :_g(g),_head(g),_left(g),_right(g) {refresh();}
     1661
     1662  private:
     1663    Arc refreshRec(std::vector<Arc> &v,int a,int b)
     1664    {
     1665      int m=(a+b)/2;
     1666      Arc me=v[m];
     1667      _left[me] = a<m?refreshRec(v,a,m-1):INVALID;
     1668      _right[me] = m<b?refreshRec(v,m+1,b):INVALID;
     1669      return me;
     1670    }
     1671  public:
     1672    ///Refresh the data structure at a node.
     1673
     1674    ///Build up the search database of node \c n.
     1675    ///
     1676    ///It runs in time <em>O(d</em>log<em>d)</em>, where <em>d</em> is
     1677    ///the number of the outgoing arcs of \c n.
     1678    void refresh(Node n)
     1679    {
     1680      std::vector<Arc> v;
     1681      for(OutArcIt e(_g,n);e!=INVALID;++e) v.push_back(e);
     1682      if(v.size()) {
     1683        std::sort(v.begin(),v.end(),ArcLess(_g));
     1684        _head[n]=refreshRec(v,0,v.size()-1);
     1685      }
     1686      else _head[n]=INVALID;
     1687    }
     1688    ///Refresh the full data structure.
     1689
     1690    ///Build up the full search database. In fact, it simply calls
     1691    ///\ref refresh(Node) "refresh(n)" for each node \c n.
     1692    ///
     1693    ///It runs in time <em>O(m</em>log<em>D)</em>, where <em>m</em> is
     1694    ///the number of the arcs of \c n and <em>D</em> is the maximum
     1695    ///out-degree of the digraph.
     1696
     1697    void refresh()
     1698    {
     1699      for(NodeIt n(_g);n!=INVALID;++n) refresh(n);
     1700    }
     1701
     1702    ///Find an arc between two nodes.
     1703
     1704    ///Find an arc between two nodes in time <em>O(</em>log<em>d)</em>, where
     1705    /// <em>d</em> is the number of outgoing arcs of \c s.
     1706    ///\param s The source node
     1707    ///\param t The target node
     1708    ///\return An arc from \c s to \c t if there exists,
     1709    ///\ref INVALID otherwise.
     1710    ///
     1711    ///\warning If you change the digraph, refresh() must be called before using
     1712    ///this operator. If you change the outgoing arcs of
     1713    ///a single node \c n, then
     1714    ///\ref refresh(Node) "refresh(n)" is enough.
     1715    ///
     1716    Arc operator()(Node s, Node t) const
     1717    {
     1718      Arc e;
     1719      for(e=_head[s];
     1720          e!=INVALID&&_g.target(e)!=t;
     1721          e = t < _g.target(e)?_left[e]:_right[e]) ;
     1722      return e;
     1723    }
     1724
     1725  };
     1726
     1727  ///Fast look up of all arcs between given endpoints.
     1728
     1729  ///This class is the same as \ref ArcLookUp, with the addition
     1730  ///that it makes it possible to find all arcs between given endpoints.
     1731  ///
     1732  ///\warning This class is static, so you should refresh() (or at least
     1733  ///refresh(Node)) this data structure
     1734  ///whenever the digraph changes. This is a time consuming (superlinearly
     1735  ///proportional (<em>O(m</em>log<em>m)</em>) to the number of arcs).
     1736  ///
     1737  ///\tparam G The type of the underlying digraph.
     1738  ///
     1739  ///\sa DynArcLookUp
     1740  ///\sa ArcLookUp
     1741  template<class G>
     1742  class AllArcLookUp : public ArcLookUp<G>
     1743  {
     1744    using ArcLookUp<G>::_g;
     1745    using ArcLookUp<G>::_right;
     1746    using ArcLookUp<G>::_left;
     1747    using ArcLookUp<G>::_head;
     1748
     1749    TEMPLATE_DIGRAPH_TYPEDEFS(G);
     1750    typedef G Digraph;
     1751
     1752    typename Digraph::template ArcMap<Arc> _next;
     1753
     1754    Arc refreshNext(Arc head,Arc next=INVALID)
     1755    {
     1756      if(head==INVALID) return next;
     1757      else {
     1758        next=refreshNext(_right[head],next);
     1759//         _next[head]=next;
     1760        _next[head]=( next!=INVALID && _g.target(next)==_g.target(head))
     1761          ? next : INVALID;
     1762        return refreshNext(_left[head],head);
     1763      }
     1764    }
     1765
     1766    void refreshNext()
     1767    {
     1768      for(NodeIt n(_g);n!=INVALID;++n) refreshNext(_head[n]);
     1769    }
     1770
     1771  public:
     1772    ///Constructor
     1773
     1774    ///Constructor.
     1775    ///
     1776    ///It builds up the search database, which remains valid until the digraph
     1777    ///changes.
     1778    AllArcLookUp(const Digraph &g) : ArcLookUp<G>(g), _next(g) {refreshNext();}
     1779
     1780    ///Refresh the data structure at a node.
     1781
     1782    ///Build up the search database of node \c n.
     1783    ///
     1784    ///It runs in time <em>O(d</em>log<em>d)</em>, where <em>d</em> is
     1785    ///the number of the outgoing arcs of \c n.
     1786
     1787    void refresh(Node n)
     1788    {
     1789      ArcLookUp<G>::refresh(n);
     1790      refreshNext(_head[n]);
     1791    }
     1792
     1793    ///Refresh the full data structure.
     1794
     1795    ///Build up the full search database. In fact, it simply calls
     1796    ///\ref refresh(Node) "refresh(n)" for each node \c n.
     1797    ///
     1798    ///It runs in time <em>O(m</em>log<em>D)</em>, where <em>m</em> is
     1799    ///the number of the arcs of \c n and <em>D</em> is the maximum
     1800    ///out-degree of the digraph.
     1801
     1802    void refresh()
     1803    {
     1804      for(NodeIt n(_g);n!=INVALID;++n) refresh(_head[n]);
     1805    }
     1806
     1807    ///Find an arc between two nodes.
     1808
     1809    ///Find an arc between two nodes.
     1810    ///\param s The source node
     1811    ///\param t The target node
     1812    ///\param prev The previous arc between \c s and \c t. It it is INVALID or
     1813    ///not given, the operator finds the first appropriate arc.
     1814    ///\return An arc from \c s to \c t after \c prev or
     1815    ///\ref INVALID if there is no more.
     1816    ///
     1817    ///For example, you can count the number of arcs from \c u to \c v in the
     1818    ///following way.
     1819    ///\code
     1820    ///AllArcLookUp<ListDigraph> ae(g);
     1821    ///...
     1822    ///int n=0;
     1823    ///for(Arc e=ae(u,v);e!=INVALID;e=ae(u,v,e)) n++;
     1824    ///\endcode
     1825    ///
     1826    ///Finding the first arc take <em>O(</em>log<em>d)</em> time, where
     1827    /// <em>d</em> is the number of outgoing arcs of \c s. Then, the
     1828    ///consecutive arcs are found in constant time.
     1829    ///
     1830    ///\warning If you change the digraph, refresh() must be called before using
     1831    ///this operator. If you change the outgoing arcs of
     1832    ///a single node \c n, then
     1833    ///\ref refresh(Node) "refresh(n)" is enough.
     1834    ///
     1835#ifdef DOXYGEN
     1836    Arc operator()(Node s, Node t, Arc prev=INVALID) const {}
     1837#else
     1838    using ArcLookUp<G>::operator() ;
     1839    Arc operator()(Node s, Node t, Arc prev) const
     1840    {
     1841      return prev==INVALID?(*this)(s,t):_next[prev];
     1842    }
     1843#endif
     1844
     1845  };
     1846
     1847  /// @}
     1848
     1849} //namespace lemon
     1850
     1851#endif

  • lemon/dfs.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/dfs.h
    a b  
    2424///\brief Dfs algorithm.
    2525
    2626#include <lemon/list_graph.h>
    27 #include <lemon/graph_utils.h>
    2827#include <lemon/bits/path_dump.h>
    29 #include <lemon/bits/invalid.h>
     28#include <lemon/core.h>
    3029#include <lemon/error.h>
    3130#include <lemon/maps.h>
    3231

  • lemon/dijkstra.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/dijkstra.h
    a b  
    2727#include <lemon/list_graph.h>
    2828#include <lemon/bin_heap.h>
    2929#include <lemon/bits/path_dump.h>
    30 #include <lemon/bits/invalid.h>
     30#include <lemon/core.h>
    3131#include <lemon/error.h>
    3232#include <lemon/maps.h>
    3333

  • lemon/dim2.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/dim2.h
    a b  
    2020#define LEMON_DIM2_H
    2121
    2222#include <iostream>
    23 #include <lemon/bits/utility.h>
     23#include <lemon/core.h>
    2424
    2525///\ingroup misc
    2626///\file

  • lemon/graph_to_eps.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/graph_to_eps.h
    a b  
    3535#endif
    3636
    3737#include<lemon/math.h>
    38 #include<lemon/bits/invalid.h>
     38#include<lemon/core.h>
    3939#include<lemon/dim2.h>
    4040#include<lemon/maps.h>
    4141#include<lemon/color.h>

  • deleted file lemon/graph_utils.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/graph_utils.h
    + -  
    1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
    2  *
    3  * This file is a part of LEMON, a generic C++ optimization library.
    4  *
    5  * Copyright (C) 2003-2008
    6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
    7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
    8  *
    9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #ifndef LEMON_GRAPH_UTILS_H
    20 #define LEMON_GRAPH_UTILS_H
    21 
    22 #include <iterator>
    23 #include <vector>
    24 #include <map>
    25 #include <cmath>
    26 #include <algorithm>
    27 
    28 #include <lemon/bits/invalid.h>
    29 #include <lemon/bits/utility.h>
    30 #include <lemon/maps.h>
    31 #include <lemon/bits/traits.h>
    32 
    33 #include <lemon/bits/alteration_notifier.h>
    34 #include <lemon/bits/default_map.h>
    35 
    36 ///\ingroup gutils
    37 ///\file
    38 ///\brief Graph utilities.
    39 
    40 namespace lemon {
    41 
    42   /// \addtogroup gutils
    43   /// @{
    44 
    45   ///Creates convenience typedefs for the digraph types and iterators
    46 
    47   ///This \c \#define creates convenience typedefs for the following types
    48   ///of \c Digraph: \c Node,  \c NodeIt, \c Arc, \c ArcIt, \c InArcIt,
    49   ///\c OutArcIt, \c BoolNodeMap, \c IntNodeMap, \c DoubleNodeMap,
    50   ///\c BoolArcMap, \c IntArcMap, \c DoubleArcMap.
    51   ///
    52   ///\note If the graph type is a dependent type, ie. the graph type depend
    53   ///on a template parameter, then use \c TEMPLATE_DIGRAPH_TYPEDEFS()
    54   ///macro.
    55 #define DIGRAPH_TYPEDEFS(Digraph)                                       \
    56   typedef Digraph::Node Node;                                           \
    57   typedef Digraph::NodeIt NodeIt;                                       \
    58   typedef Digraph::Arc Arc;                                             \
    59   typedef Digraph::ArcIt ArcIt;                                         \
    60   typedef Digraph::InArcIt InArcIt;                                     \
    61   typedef Digraph::OutArcIt OutArcIt;                                   \
    62   typedef Digraph::NodeMap<bool> BoolNodeMap;                           \
    63   typedef Digraph::NodeMap<int> IntNodeMap;                             \
    64   typedef Digraph::NodeMap<double> DoubleNodeMap;                       \
    65   typedef Digraph::ArcMap<bool> BoolArcMap;                             \
    66   typedef Digraph::ArcMap<int> IntArcMap;                               \
    67   typedef Digraph::ArcMap<double> DoubleArcMap
    68 
    69   ///Creates convenience typedefs for the digraph types and iterators
    70 
    71   ///\see DIGRAPH_TYPEDEFS
    72   ///
    73   ///\note Use this macro, if the graph type is a dependent type,
    74   ///ie. the graph type depend on a template parameter.
    75 #define TEMPLATE_DIGRAPH_TYPEDEFS(Digraph)                              \
    76   typedef typename Digraph::Node Node;                                  \
    77   typedef typename Digraph::NodeIt NodeIt;                              \
    78   typedef typename Digraph::Arc Arc;                                    \
    79   typedef typename Digraph::ArcIt ArcIt;                                \
    80   typedef typename Digraph::InArcIt InArcIt;                            \
    81   typedef typename Digraph::OutArcIt OutArcIt;                          \
    82   typedef typename Digraph::template NodeMap<bool> BoolNodeMap;         \
    83   typedef typename Digraph::template NodeMap<int> IntNodeMap;           \
    84   typedef typename Digraph::template NodeMap<double> DoubleNodeMap;     \
    85   typedef typename Digraph::template ArcMap<bool> BoolArcMap;           \
    86   typedef typename Digraph::template ArcMap<int> IntArcMap;             \
    87   typedef typename Digraph::template ArcMap<double> DoubleArcMap
    88 
    89   ///Creates convenience typedefs for the graph types and iterators
    90 
    91   ///This \c \#define creates the same convenience typedefs as defined
    92   ///by \ref DIGRAPH_TYPEDEFS(Graph) and six more, namely it creates
    93   ///\c Edge, \c EdgeIt, \c IncEdgeIt, \c BoolEdgeMap, \c IntEdgeMap,
    94   ///\c DoubleEdgeMap.
    95   ///
    96   ///\note If the graph type is a dependent type, ie. the graph type depend
    97   ///on a template parameter, then use \c TEMPLATE_DIGRAPH_TYPEDEFS()
    98   ///macro.
    99 #define GRAPH_TYPEDEFS(Graph)                                           \
    100   DIGRAPH_TYPEDEFS(Graph);                                              \
    101   typedef Graph::Edge Edge;                                             \
    102   typedef Graph::EdgeIt EdgeIt;                                         \
    103   typedef Graph::IncEdgeIt IncEdgeIt;                                   \
    104   typedef Graph::EdgeMap<bool> BoolEdgeMap;                             \
    105   typedef Graph::EdgeMap<int> IntEdgeMap;                               \
    106   typedef Graph::EdgeMap<double> DoubleEdgeMap
    107 
    108   ///Creates convenience typedefs for the graph types and iterators
    109 
    110   ///\see GRAPH_TYPEDEFS
    111   ///
    112   ///\note Use this macro, if the graph type is a dependent type,
    113   ///ie. the graph type depend on a template parameter.
    114 #define TEMPLATE_GRAPH_TYPEDEFS(Graph)                                  \
    115   TEMPLATE_DIGRAPH_TYPEDEFS(Graph);                                     \
    116   typedef typename Graph::Edge Edge;                                    \
    117   typedef typename Graph::EdgeIt EdgeIt;                                \
    118   typedef typename Graph::IncEdgeIt IncEdgeIt;                          \
    119   typedef typename Graph::template EdgeMap<bool> BoolEdgeMap;           \
    120   typedef typename Graph::template EdgeMap<int> IntEdgeMap;             \
    121   typedef typename Graph::template EdgeMap<double> DoubleEdgeMap
    122 
    123   /// \brief Function to count the items in the graph.
    124   ///
    125   /// This function counts the items (nodes, arcs etc) in the graph.
    126   /// The complexity of the function is O(n) because
    127   /// it iterates on all of the items.
    128   template <typename Graph, typename Item>
    129   inline int countItems(const Graph& g) {
    130     typedef typename ItemSetTraits<Graph, Item>::ItemIt ItemIt;
    131     int num = 0;
    132     for (ItemIt it(g); it != INVALID; ++it) {
    133       ++num;
    134     }
    135     return num;
    136   }
    137 
    138   // Node counting:
    139 
    140   namespace _graph_utils_bits {
    141 
    142     template <typename Graph, typename Enable = void>
    143     struct CountNodesSelector {
    144       static int count(const Graph &g) {
    145         return countItems<Graph, typename Graph::Node>(g);
    146       }
    147     };
    148 
    149     template <typename Graph>
    150     struct CountNodesSelector<
    151       Graph, typename
    152       enable_if<typename Graph::NodeNumTag, void>::type>
    153     {
    154       static int count(const Graph &g) {
    155         return g.nodeNum();
    156       }
    157     };
    158   }
    159 
    160   /// \brief Function to count the nodes in the graph.
    161   ///
    162   /// This function counts the nodes in the graph.
    163   /// The complexity of the function is O(n) but for some
    164   /// graph structures it is specialized to run in O(1).
    165   ///
    166   /// If the graph contains a \e nodeNum() member function and a
    167   /// \e NodeNumTag tag then this function calls directly the member
    168   /// function to query the cardinality of the node set.
    169   template <typename Graph>
    170   inline int countNodes(const Graph& g) {
    171     return _graph_utils_bits::CountNodesSelector<Graph>::count(g);
    172   }
    173 
    174   // Arc counting:
    175 
    176   namespace _graph_utils_bits {
    177 
    178     template <typename Graph, typename Enable = void>
    179     struct CountArcsSelector {
    180       static int count(const Graph &g) {
    181         return countItems<Graph, typename Graph::Arc>(g);
    182       }
    183     };
    184 
    185     template <typename Graph>
    186     struct CountArcsSelector<
    187       Graph,
    188       typename enable_if<typename Graph::ArcNumTag, void>::type>
    189     {
    190       static int count(const Graph &g) {
    191         return g.arcNum();
    192       }
    193     };
    194   }
    195 
    196   /// \brief Function to count the arcs in the graph.
    197   ///
    198   /// This function counts the arcs in the graph.
    199   /// The complexity of the function is O(e) but for some
    200   /// graph structures it is specialized to run in O(1).
    201   ///
    202   /// If the graph contains a \e arcNum() member function and a
    203   /// \e EdgeNumTag tag then this function calls directly the member
    204   /// function to query the cardinality of the arc set.
    205   template <typename Graph>
    206   inline int countArcs(const Graph& g) {
    207     return _graph_utils_bits::CountArcsSelector<Graph>::count(g);
    208   }
    209 
    210   // Edge counting:
    211   namespace _graph_utils_bits {
    212 
    213     template <typename Graph, typename Enable = void>
    214     struct CountEdgesSelector {
    215       static int count(const Graph &g) {
    216         return countItems<Graph, typename Graph::Edge>(g);
    217       }
    218     };
    219 
    220     template <typename Graph>
    221     struct CountEdgesSelector<
    222       Graph,
    223       typename enable_if<typename Graph::EdgeNumTag, void>::type>
    224     {
    225       static int count(const Graph &g) {
    226         return g.edgeNum();
    227       }
    228     };
    229   }
    230 
    231   /// \brief Function to count the edges in the graph.
    232   ///
    233   /// This function counts the edges in the graph.
    234   /// The complexity of the function is O(m) but for some
    235   /// graph structures it is specialized to run in O(1).
    236   ///
    237   /// If the graph contains a \e edgeNum() member function and a
    238   /// \e EdgeNumTag tag then this function calls directly the member
    239   /// function to query the cardinality of the edge set.
    240   template <typename Graph>
    241   inline int countEdges(const Graph& g) {
    242     return _graph_utils_bits::CountEdgesSelector<Graph>::count(g);
    243 
    244   }
    245 
    246 
    247   template <typename Graph, typename DegIt>
    248   inline int countNodeDegree(const Graph& _g, const typename Graph::Node& _n) {
    249     int num = 0;
    250     for (DegIt it(_g, _n); it != INVALID; ++it) {
    251       ++num;
    252     }
    253     return num;
    254   }
    255 
    256   /// \brief Function to count the number of the out-arcs from node \c n.
    257   ///
    258   /// This function counts the number of the out-arcs from node \c n
    259   /// in the graph.
    260   template <typename Graph>
    261   inline int countOutArcs(const Graph& _g,  const typename Graph::Node& _n) {
    262     return countNodeDegree<Graph, typename Graph::OutArcIt>(_g, _n);
    263   }
    264 
    265   /// \brief Function to count the number of the in-arcs to node \c n.
    266   ///
    267   /// This function counts the number of the in-arcs to node \c n
    268   /// in the graph.
    269   template <typename Graph>
    270   inline int countInArcs(const Graph& _g,  const typename Graph::Node& _n) {
    271     return countNodeDegree<Graph, typename Graph::InArcIt>(_g, _n);
    272   }
    273 
    274   /// \brief Function to count the number of the inc-edges to node \c n.
    275   ///
    276   /// This function counts the number of the inc-edges to node \c n
    277   /// in the graph.
    278   template <typename Graph>
    279   inline int countIncEdges(const Graph& _g,  const typename Graph::Node& _n) {
    280     return countNodeDegree<Graph, typename Graph::IncEdgeIt>(_g, _n);
    281   }
    282 
    283   namespace _graph_utils_bits {
    284 
    285     template <typename Graph, typename Enable = void>
    286     struct FindArcSelector {
    287       typedef typename Graph::Node Node;
    288       typedef typename Graph::Arc Arc;
    289       static Arc find(const Graph &g, Node u, Node v, Arc e) {
    290         if (e == INVALID) {
    291           g.firstOut(e, u);
    292         } else {
    293           g.nextOut(e);
    294         }
    295         while (e != INVALID && g.target(e) != v) {
    296           g.nextOut(e);
    297         }
    298         return e;
    299       }
    300     };
    301 
    302     template <typename Graph>
    303     struct FindArcSelector<
    304       Graph,
    305       typename enable_if<typename Graph::FindEdgeTag, void>::type>
    306     {
    307       typedef typename Graph::Node Node;
    308       typedef typename Graph::Arc Arc;
    309       static Arc find(const Graph &g, Node u, Node v, Arc prev) {
    310         return g.findArc(u, v, prev);
    311       }
    312     };
    313   }
    314 
    315   /// \brief Finds an arc between two nodes of a graph.
    316   ///
    317   /// Finds an arc from node \c u to node \c v in graph \c g.
    318   ///
    319   /// If \c prev is \ref INVALID (this is the default value), then
    320   /// it finds the first arc from \c u to \c v. Otherwise it looks for
    321   /// the next arc from \c u to \c v after \c prev.
    322   /// \return The found arc or \ref INVALID if there is no such an arc.
    323   ///
    324   /// Thus you can iterate through each arc from \c u to \c v as it follows.
    325   ///\code
    326   /// for(Arc e=findArc(g,u,v);e!=INVALID;e=findArc(g,u,v,e)) {
    327   ///   ...
    328   /// }
    329   ///\endcode
    330   ///
    331   ///\sa ArcLookUp
    332   ///\sa AllArcLookUp
    333   ///\sa DynArcLookUp
    334   ///\sa ConArcIt
    335   template <typename Graph>
    336   inline typename Graph::Arc
    337   findArc(const Graph &g, typename Graph::Node u, typename Graph::Node v,
    338            typename Graph::Arc prev = INVALID) {
    339     return _graph_utils_bits::FindArcSelector<Graph>::find(g, u, v, prev);
    340   }
    341 
    342   /// \brief Iterator for iterating on arcs connected the same nodes.
    343   ///
    344   /// Iterator for iterating on arcs connected the same nodes. It is
    345   /// higher level interface for the findArc() function. You can
    346   /// use it the following way:
    347   ///\code
    348   /// for (ConArcIt<Graph> it(g, src, trg); it != INVALID; ++it) {
    349   ///   ...
    350   /// }
    351   ///\endcode
    352   ///
    353   ///\sa findArc()
    354   ///\sa ArcLookUp
    355   ///\sa AllArcLookUp
    356   ///\sa DynArcLookUp
    357   template <typename _Graph>
    358   class ConArcIt : public _Graph::Arc {
    359   public:
    360 
    361     typedef _Graph Graph;
    362     typedef typename Graph::Arc Parent;
    363 
    364     typedef typename Graph::Arc Arc;
    365     typedef typename Graph::Node Node;
    366 
    367     /// \brief Constructor.
    368     ///
    369     /// Construct a new ConArcIt iterating on the arcs which
    370     /// connects the \c u and \c v node.
    371     ConArcIt(const Graph& g, Node u, Node v) : _graph(g) {
    372       Parent::operator=(findArc(_graph, u, v));
    373     }
    374 
    375     /// \brief Constructor.
    376     ///
    377     /// Construct a new ConArcIt which continues the iterating from
    378     /// the \c e arc.
    379     ConArcIt(const Graph& g, Arc a) : Parent(a), _graph(g) {}
    380 
    381     /// \brief Increment operator.
    382     ///
    383     /// It increments the iterator and gives back the next arc.
    384     ConArcIt& operator++() {
    385       Parent::operator=(findArc(_graph, _graph.source(*this),
    386                                 _graph.target(*this), *this));
    387       return *this;
    388     }
    389   private:
    390     const Graph& _graph;
    391   };
    392 
    393   namespace _graph_utils_bits {
    394 
    395     template <typename Graph, typename Enable = void>
    396     struct FindEdgeSelector {
    397       typedef typename Graph::Node Node;
    398       typedef typename Graph::Edge Edge;
    399       static Edge find(const Graph &g, Node u, Node v, Edge e) {
    400         bool b;
    401         if (u != v) {
    402           if (e == INVALID) {
    403             g.firstInc(e, b, u);
    404           } else {
    405             b = g.u(e) == u;
    406             g.nextInc(e, b);
    407           }
    408           while (e != INVALID && (b ? g.v(e) : g.u(e)) != v) {
    409             g.nextInc(e, b);
    410           }
    411         } else {
    412           if (e == INVALID) {
    413             g.firstInc(e, b, u);
    414           } else {
    415             b = true;
    416             g.nextInc(e, b);
    417           }
    418           while (e != INVALID && (!b || g.v(e) != v)) {
    419             g.nextInc(e, b);
    420           }
    421         }
    422         return e;
    423       }
    424     };
    425 
    426     template <typename Graph>
    427     struct FindEdgeSelector<
    428       Graph,
    429       typename enable_if<typename Graph::FindEdgeTag, void>::type>
    430     {
    431       typedef typename Graph::Node Node;
    432       typedef typename Graph::Edge Edge;
    433       static Edge find(const Graph &g, Node u, Node v, Edge prev) {
    434         return g.findEdge(u, v, prev);
    435       }
    436     };
    437   }
    438 
    439   /// \brief Finds an edge between two nodes of a graph.
    440   ///
    441   /// Finds an edge from node \c u to node \c v in graph \c g.
    442   /// If the node \c u and node \c v is equal then each loop edge
    443   /// will be enumerated once.
    444   ///
    445   /// If \c prev is \ref INVALID (this is the default value), then
    446   /// it finds the first arc from \c u to \c v. Otherwise it looks for
    447   /// the next arc from \c u to \c v after \c prev.
    448   /// \return The found arc or \ref INVALID if there is no such an arc.
    449   ///
    450   /// Thus you can iterate through each arc from \c u to \c v as it follows.
    451   ///\code
    452   /// for(Edge e = findEdge(g,u,v); e != INVALID;
    453   ///     e = findEdge(g,u,v,e)) {
    454   ///   ...
    455   /// }
    456   ///\endcode
    457   ///
    458   ///\sa ConEdgeIt
    459 
    460   template <typename Graph>
    461   inline typename Graph::Edge
    462   findEdge(const Graph &g, typename Graph::Node u, typename Graph::Node v,
    463             typename Graph::Edge p = INVALID) {
    464     return _graph_utils_bits::FindEdgeSelector<Graph>::find(g, u, v, p);
    465   }
    466 
    467   /// \brief Iterator for iterating on edges connected the same nodes.
    468   ///
    469   /// Iterator for iterating on edges connected the same nodes. It is
    470   /// higher level interface for the findEdge() function. You can
    471   /// use it the following way:
    472   ///\code
    473   /// for (ConEdgeIt<Graph> it(g, src, trg); it != INVALID; ++it) {
    474   ///   ...
    475   /// }
    476   ///\endcode
    477   ///
    478   ///\sa findEdge()
    479   template <typename _Graph>
    480   class ConEdgeIt : public _Graph::Edge {
    481   public:
    482 
    483     typedef _Graph Graph;
    484     typedef typename Graph::Edge Parent;
    485 
    486     typedef typename Graph::Edge Edge;
    487     typedef typename Graph::Node Node;
    488 
    489     /// \brief Constructor.
    490     ///
    491     /// Construct a new ConEdgeIt iterating on the edges which
    492     /// connects the \c u and \c v node.
    493     ConEdgeIt(const Graph& g, Node u, Node v) : _graph(g) {
    494       Parent::operator=(findEdge(_graph, u, v));
    495     }
    496 
    497     /// \brief Constructor.
    498     ///
    499     /// Construct a new ConEdgeIt which continues the iterating from
    500     /// the \c e edge.
    501     ConEdgeIt(const Graph& g, Edge e) : Parent(e), _graph(g) {}
    502 
    503     /// \brief Increment operator.
    504     ///
    505     /// It increments the iterator and gives back the next edge.
    506     ConEdgeIt& operator++() {
    507       Parent::operator=(findEdge(_graph, _graph.u(*this),
    508                                  _graph.v(*this), *this));
    509       return *this;
    510     }
    511   private:
    512     const Graph& _graph;
    513   };
    514 
    515   namespace _graph_utils_bits {
    516 
    517     template <typename Digraph, typename Item, typename RefMap>
    518     class MapCopyBase {
    519     public:
    520       virtual void copy(const Digraph& from, const RefMap& refMap) = 0;
    521 
    522       virtual ~MapCopyBase() {}
    523     };
    524 
    525     template <typename Digraph, typename Item, typename RefMap,
    526               typename ToMap, typename FromMap>
    527     class MapCopy : public MapCopyBase<Digraph, Item, RefMap> {
    528     public:
    529 
    530       MapCopy(ToMap& tmap, const FromMap& map)
    531         : _tmap(tmap), _map(map) {}
    532 
    533       virtual void copy(const Digraph& digraph, const RefMap& refMap) {
    534         typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt;
    535         for (ItemIt it(digraph); it != INVALID; ++it) {
    536           _tmap.set(refMap[it], _map[it]);
    537         }
    538       }
    539 
    540     private:
    541       ToMap& _tmap;
    542       const FromMap& _map;
    543     };
    544 
    545     template <typename Digraph, typename Item, typename RefMap, typename It>
    546     class ItemCopy : public MapCopyBase<Digraph, Item, RefMap> {
    547     public:
    548 
    549       ItemCopy(It& it, const Item& item) : _it(it), _item(item) {}
    550 
    551       virtual void copy(const Digraph&, const RefMap& refMap) {
    552         _it = refMap[_item];
    553       }
    554 
    555     private:
    556       It& _it;
    557       Item _item;
    558     };
    559 
    560     template <typename Digraph, typename Item, typename RefMap, typename Ref>
    561     class RefCopy : public MapCopyBase<Digraph, Item, RefMap> {
    562     public:
    563 
    564       RefCopy(Ref& map) : _map(map) {}
    565 
    566       virtual void copy(const Digraph& digraph, const RefMap& refMap) {
    567         typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt;
    568         for (ItemIt it(digraph); it != INVALID; ++it) {
    569           _map.set(it, refMap[it]);
    570         }
    571       }
    572 
    573     private:
    574       Ref& _map;
    575     };
    576 
    577     template <typename Digraph, typename Item, typename RefMap,
    578               typename CrossRef>
    579     class CrossRefCopy : public MapCopyBase<Digraph, Item, RefMap> {
    580     public:
    581 
    582       CrossRefCopy(CrossRef& cmap) : _cmap(cmap) {}
    583 
    584       virtual void copy(const Digraph& digraph, const RefMap& refMap) {
    585         typedef typename ItemSetTraits<Digraph, Item>::ItemIt ItemIt;
    586         for (ItemIt it(digraph); it != INVALID; ++it) {
    587           _cmap.set(refMap[it], it);
    588         }
    589       }
    590 
    591     private:
    592       CrossRef& _cmap;
    593     };
    594 
    595     template <typename Digraph, typename Enable = void>
    596     struct DigraphCopySelector {
    597       template <typename From, typename NodeRefMap, typename ArcRefMap>
    598       static void copy(Digraph &to, const From& from,
    599                        NodeRefMap& nodeRefMap, ArcRefMap& arcRefMap) {
    600         for (typename From::NodeIt it(from); it != INVALID; ++it) {
    601           nodeRefMap[it] = to.addNode();
    602         }
    603         for (typename From::ArcIt it(from); it != INVALID; ++it) {
    604           arcRefMap[it] = to.addArc(nodeRefMap[from.source(it)],
    605                                     nodeRefMap[from.target(it)]);
    606         }
    607       }
    608     };
    609 
    610     template <typename Digraph>
    611     struct DigraphCopySelector<
    612       Digraph,
    613       typename enable_if<typename Digraph::BuildTag, void>::type>
    614     {
    615       template <typename From, typename NodeRefMap, typename ArcRefMap>
    616       static void copy(Digraph &to, const From& from,
    617                        NodeRefMap& nodeRefMap, ArcRefMap& arcRefMap) {
    618         to.build(from, nodeRefMap, arcRefMap);
    619       }
    620     };
    621 
    622     template <typename Graph, typename Enable = void>
    623     struct GraphCopySelector {
    624       template <typename From, typename NodeRefMap, typename EdgeRefMap>
    625       static void copy(Graph &to, const From& from,
    626                        NodeRefMap& nodeRefMap, EdgeRefMap& edgeRefMap) {
    627         for (typename From::NodeIt it(from); it != INVALID; ++it) {
    628           nodeRefMap[it] = to.addNode();
    629         }
    630         for (typename From::EdgeIt it(from); it != INVALID; ++it) {
    631           edgeRefMap[it] = to.addEdge(nodeRefMap[from.u(it)],
    632                                       nodeRefMap[from.v(it)]);
    633         }
    634       }
    635     };
    636 
    637     template <typename Graph>
    638     struct GraphCopySelector<
    639       Graph,
    640       typename enable_if<typename Graph::BuildTag, void>::type>
    641     {
    642       template <typename From, typename NodeRefMap, typename EdgeRefMap>
    643       static void copy(Graph &to, const From& from,
    644                        NodeRefMap& nodeRefMap, EdgeRefMap& edgeRefMap) {
    645         to.build(from, nodeRefMap, edgeRefMap);
    646       }
    647     };
    648 
    649   }
    650 
    651   /// \brief Class to copy a digraph.
    652   ///
    653   /// Class to copy a digraph to another digraph (duplicate a digraph). The
    654   /// simplest way of using it is through the \c copyDigraph() function.
    655   ///
    656   /// This class not just make a copy of a graph, but it can create
    657   /// references and cross references between the nodes and arcs of
    658   /// the two graphs, it can copy maps for use with the newly created
    659   /// graph and copy nodes and arcs.
    660   ///
    661   /// To make a copy from a graph, first an instance of DigraphCopy
    662   /// should be created, then the data belongs to the graph should
    663   /// assigned to copy. In the end, the \c run() member should be
    664   /// called.
    665   ///
    666   /// The next code copies a graph with several data:
    667   ///\code
    668   ///  DigraphCopy<NewGraph, OrigGraph> dc(new_graph, orig_graph);
    669   ///  // create a reference for the nodes
    670   ///  OrigGraph::NodeMap<NewGraph::Node> nr(orig_graph);
    671   ///  dc.nodeRef(nr);
    672   ///  // create a cross reference (inverse) for the arcs
    673   ///  NewGraph::ArcMap<OrigGraph::Arc> acr(new_graph);
    674   ///  dc.arcCrossRef(acr);
    675   ///  // copy an arc map
    676   ///  OrigGraph::ArcMap<double> oamap(orig_graph);
    677   ///  NewGraph::ArcMap<double> namap(new_graph);
    678   ///  dc.arcMap(namap, oamap);
    679   ///  // copy a node
    680   ///  OrigGraph::Node on;
    681   ///  NewGraph::Node nn;
    682   ///  dc.node(nn, on);
    683   ///  // Executions of copy
    684   ///  dc.run();
    685   ///\endcode
    686   template <typename To, typename From>
    687   class DigraphCopy {
    688   private:
    689 
    690     typedef typename From::Node Node;
    691     typedef typename From::NodeIt NodeIt;
    692     typedef typename From::Arc Arc;
    693     typedef typename From::ArcIt ArcIt;
    694 
    695     typedef typename To::Node TNode;
    696     typedef typename To::Arc TArc;
    697 
    698     typedef typename From::template NodeMap<TNode> NodeRefMap;
    699     typedef typename From::template ArcMap<TArc> ArcRefMap;
    700 
    701 
    702   public:
    703 
    704 
    705     /// \brief Constructor for the DigraphCopy.
    706     ///
    707     /// It copies the content of the \c _from digraph into the
    708     /// \c _to digraph.
    709     DigraphCopy(To& to, const From& from)
    710       : _from(from), _to(to) {}
    711 
    712     /// \brief Destructor of the DigraphCopy
    713     ///
    714     /// Destructor of the DigraphCopy
    715     ~DigraphCopy() {
    716       for (int i = 0; i < int(_node_maps.size()); ++i) {
    717         delete _node_maps[i];
    718       }
    719       for (int i = 0; i < int(_arc_maps.size()); ++i) {
    720         delete _arc_maps[i];
    721       }
    722 
    723     }
    724 
    725     /// \brief Copies the node references into the given map.
    726     ///
    727     /// Copies the node references into the given map. The parameter
    728     /// should be a map, which key type is the Node type of the source
    729     /// graph, while the value type is the Node type of the
    730     /// destination graph.
    731     template <typename NodeRef>
    732     DigraphCopy& nodeRef(NodeRef& map) {
    733       _node_maps.push_back(new _graph_utils_bits::RefCopy<From, Node,
    734                            NodeRefMap, NodeRef>(map));
    735       return *this;
    736     }
    737 
    738     /// \brief Copies the node cross references into the given map.
    739     ///
    740     ///  Copies the node cross references (reverse references) into
    741     ///  the given map. The parameter should be a map, which key type
    742     ///  is the Node type of the destination graph, while the value type is
    743     ///  the Node type of the source graph.
    744     template <typename NodeCrossRef>
    745     DigraphCopy& nodeCrossRef(NodeCrossRef& map) {
    746       _node_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, Node,
    747                            NodeRefMap, NodeCrossRef>(map));
    748       return *this;
    749     }
    750 
    751     /// \brief Make copy of the given map.
    752     ///
    753     /// Makes copy of the given map for the newly created digraph.
    754     /// The new map's key type is the destination graph's node type,
    755     /// and the copied map's key type is the source graph's node type.
    756     template <typename ToMap, typename FromMap>
    757     DigraphCopy& nodeMap(ToMap& tmap, const FromMap& map) {
    758       _node_maps.push_back(new _graph_utils_bits::MapCopy<From, Node,
    759                            NodeRefMap, ToMap, FromMap>(tmap, map));
    760       return *this;
    761     }
    762 
    763     /// \brief Make a copy of the given node.
    764     ///
    765     /// Make a copy of the given node.
    766     DigraphCopy& node(TNode& tnode, const Node& snode) {
    767       _node_maps.push_back(new _graph_utils_bits::ItemCopy<From, Node,
    768                            NodeRefMap, TNode>(tnode, snode));
    769       return *this;
    770     }
    771 
    772     /// \brief Copies the arc references into the given map.
    773     ///
    774     /// Copies the arc references into the given map.
    775     template <typename ArcRef>
    776     DigraphCopy& arcRef(ArcRef& map) {
    777       _arc_maps.push_back(new _graph_utils_bits::RefCopy<From, Arc,
    778                           ArcRefMap, ArcRef>(map));
    779       return *this;
    780     }
    781 
    782     /// \brief Copies the arc cross references into the given map.
    783     ///
    784     ///  Copies the arc cross references (reverse references) into
    785     ///  the given map.
    786     template <typename ArcCrossRef>
    787     DigraphCopy& arcCrossRef(ArcCrossRef& map) {
    788       _arc_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, Arc,
    789                           ArcRefMap, ArcCrossRef>(map));
    790       return *this;
    791     }
    792 
    793     /// \brief Make copy of the given map.
    794     ///
    795     /// Makes copy of the given map for the newly created digraph.
    796     /// The new map's key type is the to digraph's arc type,
    797     /// and the copied map's key type is the from digraph's arc
    798     /// type.
    799     template <typename ToMap, typename FromMap>
    800     DigraphCopy& arcMap(ToMap& tmap, const FromMap& map) {
    801       _arc_maps.push_back(new _graph_utils_bits::MapCopy<From, Arc,
    802                           ArcRefMap, ToMap, FromMap>(tmap, map));
    803       return *this;
    804     }
    805 
    806     /// \brief Make a copy of the given arc.
    807     ///
    808     /// Make a copy of the given arc.
    809     DigraphCopy& arc(TArc& tarc, const Arc& sarc) {
    810       _arc_maps.push_back(new _graph_utils_bits::ItemCopy<From, Arc,
    811                           ArcRefMap, TArc>(tarc, sarc));
    812       return *this;
    813     }
    814 
    815     /// \brief Executes the copies.
    816     ///
    817     /// Executes the copies.
    818     void run() {
    819       NodeRefMap nodeRefMap(_from);
    820       ArcRefMap arcRefMap(_from);
    821       _graph_utils_bits::DigraphCopySelector<To>::
    822         copy(_to, _from, nodeRefMap, arcRefMap);
    823       for (int i = 0; i < int(_node_maps.size()); ++i) {
    824         _node_maps[i]->copy(_from, nodeRefMap);
    825       }
    826       for (int i = 0; i < int(_arc_maps.size()); ++i) {
    827         _arc_maps[i]->copy(_from, arcRefMap);
    828       }
    829     }
    830 
    831   protected:
    832 
    833 
    834     const From& _from;
    835     To& _to;
    836 
    837     std::vector<_graph_utils_bits::MapCopyBase<From, Node, NodeRefMap>* >
    838     _node_maps;
    839 
    840     std::vector<_graph_utils_bits::MapCopyBase<From, Arc, ArcRefMap>* >
    841     _arc_maps;
    842 
    843   };
    844 
    845   /// \brief Copy a digraph to another digraph.
    846   ///
    847   /// Copy a digraph to another digraph. The complete usage of the
    848   /// function is detailed in the DigraphCopy class, but a short
    849   /// example shows a basic work:
    850   ///\code
    851   /// copyDigraph(trg, src).nodeRef(nr).arcCrossRef(ecr).run();
    852   ///\endcode
    853   ///
    854   /// After the copy the \c nr map will contain the mapping from the
    855   /// nodes of the \c from digraph to the nodes of the \c to digraph and
    856   /// \c ecr will contain the mapping from the arcs of the \c to digraph
    857   /// to the arcs of the \c from digraph.
    858   ///
    859   /// \see DigraphCopy
    860   template <typename To, typename From>
    861   DigraphCopy<To, From> copyDigraph(To& to, const From& from) {
    862     return DigraphCopy<To, From>(to, from);
    863   }
    864 
    865   /// \brief Class to copy a graph.
    866   ///
    867   /// Class to copy a graph to another graph (duplicate a graph). The
    868   /// simplest way of using it is through the \c copyGraph() function.
    869   ///
    870   /// This class not just make a copy of a graph, but it can create
    871   /// references and cross references between the nodes, edges and arcs of
    872   /// the two graphs, it can copy maps for use with the newly created
    873   /// graph and copy nodes, edges and arcs.
    874   ///
    875   /// To make a copy from a graph, first an instance of GraphCopy
    876   /// should be created, then the data belongs to the graph should
    877   /// assigned to copy. In the end, the \c run() member should be
    878   /// called.
    879   ///
    880   /// The next code copies a graph with several data:
    881   ///\code
    882   ///  GraphCopy<NewGraph, OrigGraph> dc(new_graph, orig_graph);
    883   ///  // create a reference for the nodes
    884   ///  OrigGraph::NodeMap<NewGraph::Node> nr(orig_graph);
    885   ///  dc.nodeRef(nr);
    886   ///  // create a cross reference (inverse) for the edges
    887   ///  NewGraph::EdgeMap<OrigGraph::Arc> ecr(new_graph);
    888   ///  dc.edgeCrossRef(ecr);
    889   ///  // copy an arc map
    890   ///  OrigGraph::ArcMap<double> oamap(orig_graph);
    891   ///  NewGraph::ArcMap<double> namap(new_graph);
    892   ///  dc.arcMap(namap, oamap);
    893   ///  // copy a node
    894   ///  OrigGraph::Node on;
    895   ///  NewGraph::Node nn;
    896   ///  dc.node(nn, on);
    897   ///  // Executions of copy
    898   ///  dc.run();
    899   ///\endcode
    900   template <typename To, typename From>
    901   class GraphCopy {
    902   private:
    903 
    904     typedef typename From::Node Node;
    905     typedef typename From::NodeIt NodeIt;
    906     typedef typename From::Arc Arc;
    907     typedef typename From::ArcIt ArcIt;
    908     typedef typename From::Edge Edge;
    909     typedef typename From::EdgeIt EdgeIt;
    910 
    911     typedef typename To::Node TNode;
    912     typedef typename To::Arc TArc;
    913     typedef typename To::Edge TEdge;
    914 
    915     typedef typename From::template NodeMap<TNode> NodeRefMap;
    916     typedef typename From::template EdgeMap<TEdge> EdgeRefMap;
    917 
    918     struct ArcRefMap {
    919       ArcRefMap(const To& to, const From& from,
    920                 const EdgeRefMap& edge_ref, const NodeRefMap& node_ref)
    921         : _to(to), _from(from),
    922           _edge_ref(edge_ref), _node_ref(node_ref) {}
    923 
    924       typedef typename From::Arc Key;
    925       typedef typename To::Arc Value;
    926 
    927       Value operator[](const Key& key) const {
    928         bool forward = _from.u(key) != _from.v(key) ?
    929           _node_ref[_from.source(key)] ==
    930           _to.source(_to.direct(_edge_ref[key], true)) :
    931           _from.direction(key);
    932         return _to.direct(_edge_ref[key], forward);
    933       }
    934 
    935       const To& _to;
    936       const From& _from;
    937       const EdgeRefMap& _edge_ref;
    938       const NodeRefMap& _node_ref;
    939     };
    940 
    941 
    942   public:
    943 
    944 
    945     /// \brief Constructor for the GraphCopy.
    946     ///
    947     /// It copies the content of the \c _from graph into the
    948     /// \c _to graph.
    949     GraphCopy(To& to, const From& from)
    950       : _from(from), _to(to) {}
    951 
    952     /// \brief Destructor of the GraphCopy
    953     ///
    954     /// Destructor of the GraphCopy
    955     ~GraphCopy() {
    956       for (int i = 0; i < int(_node_maps.size()); ++i) {
    957         delete _node_maps[i];
    958       }
    959       for (int i = 0; i < int(_arc_maps.size()); ++i) {
    960         delete _arc_maps[i];
    961       }
    962       for (int i = 0; i < int(_edge_maps.size()); ++i) {
    963         delete _edge_maps[i];
    964       }
    965 
    966     }
    967 
    968     /// \brief Copies the node references into the given map.
    969     ///
    970     /// Copies the node references into the given map.
    971     template <typename NodeRef>
    972     GraphCopy& nodeRef(NodeRef& map) {
    973       _node_maps.push_back(new _graph_utils_bits::RefCopy<From, Node,
    974                            NodeRefMap, NodeRef>(map));
    975       return *this;
    976     }
    977 
    978     /// \brief Copies the node cross references into the given map.
    979     ///
    980     ///  Copies the node cross references (reverse references) into
    981     ///  the given map.
    982     template <typename NodeCrossRef>
    983     GraphCopy& nodeCrossRef(NodeCrossRef& map) {
    984       _node_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, Node,
    985                            NodeRefMap, NodeCrossRef>(map));
    986       return *this;
    987     }
    988 
    989     /// \brief Make copy of the given map.
    990     ///
    991     /// Makes copy of the given map for the newly created graph.
    992     /// The new map's key type is the to graph's node type,
    993     /// and the copied map's key type is the from graph's node
    994     /// type.
    995     template <typename ToMap, typename FromMap>
    996     GraphCopy& nodeMap(ToMap& tmap, const FromMap& map) {
    997       _node_maps.push_back(new _graph_utils_bits::MapCopy<From, Node,
    998                            NodeRefMap, ToMap, FromMap>(tmap, map));
    999       return *this;
    1000     }
    1001 
    1002     /// \brief Make a copy of the given node.
    1003     ///
    1004     /// Make a copy of the given node.
    1005     GraphCopy& node(TNode& tnode, const Node& snode) {
    1006       _node_maps.push_back(new _graph_utils_bits::ItemCopy<From, Node,
    1007                            NodeRefMap, TNode>(tnode, snode));
    1008       return *this;
    1009     }
    1010 
    1011     /// \brief Copies the arc references into the given map.
    1012     ///
    1013     /// Copies the arc references into the given map.
    1014     template <typename ArcRef>
    1015     GraphCopy& arcRef(ArcRef& map) {
    1016       _arc_maps.push_back(new _graph_utils_bits::RefCopy<From, Arc,
    1017                           ArcRefMap, ArcRef>(map));
    1018       return *this;
    1019     }
    1020 
    1021     /// \brief Copies the arc cross references into the given map.
    1022     ///
    1023     ///  Copies the arc cross references (reverse references) into
    1024     ///  the given map.
    1025     template <typename ArcCrossRef>
    1026     GraphCopy& arcCrossRef(ArcCrossRef& map) {
    1027       _arc_maps.push_back(new _graph_utils_bits::CrossRefCopy<From, Arc,
    1028                           ArcRefMap, ArcCrossRef>(map));
    1029       return *this;
    1030     }
    1031 
    1032     /// \brief Make copy of the given map.
    1033     ///
    1034     /// Makes copy of the given map for the newly created graph.
    1035     /// The new map's key type is the to graph's arc type,
    1036     /// and the copied map's key type is the from graph's arc
    1037     /// type.
    1038     template <typename ToMap, typename FromMap>
    1039     GraphCopy& arcMap(ToMap& tmap, const FromMap& map) {
    1040       _arc_maps.push_back(new _graph_utils_bits::MapCopy<From, Arc,
    1041                           ArcRefMap, ToMap, FromMap>(tmap, map));
    1042       return *this;
    1043     }
    1044 
    1045     /// \brief Make a copy of the given arc.
    1046     ///
    1047     /// Make a copy of the given arc.
    1048     GraphCopy& arc(TArc& tarc, const Arc& sarc) {
    1049       _arc_maps.push_back(new _graph_utils_bits::ItemCopy<From, Arc,
    1050                           ArcRefMap, TArc>(tarc, sarc));
    1051       return *this;
    1052     }
    1053 
    1054     /// \brief Copies the edge references into the given map.
    1055     ///
    1056     /// Copies the edge references into the given map.
    1057     template <typename EdgeRef>
    1058     GraphCopy& edgeRef(EdgeRef& map) {
    1059       _edge_maps.push_back(new _graph_utils_bits::RefCopy<From, Edge,
    1060                            EdgeRefMap, EdgeRef>(map));
    1061       return *this;
    1062     }
    1063 
    1064     /// \brief Copies the edge cross references into the given map.
    1065     ///
    1066     /// Copies the edge cross references (reverse
    1067     /// references) into the given map.
    1068     template <typename EdgeCrossRef>
    1069     GraphCopy& edgeCrossRef(EdgeCrossRef& map) {
    1070       _edge_maps.push_back(new _graph_utils_bits::CrossRefCopy<From,
    1071                            Edge, EdgeRefMap, EdgeCrossRef>(map));
    1072       return *this;
    1073     }
    1074 
    1075     /// \brief Make copy of the given map.
    1076     ///
    1077     /// Makes copy of the given map for the newly created graph.
    1078     /// The new map's key type is the to graph's edge type,
    1079     /// and the copied map's key type is the from graph's edge
    1080     /// type.
    1081     template <typename ToMap, typename FromMap>
    1082     GraphCopy& edgeMap(ToMap& tmap, const FromMap& map) {
    1083       _edge_maps.push_back(new _graph_utils_bits::MapCopy<From, Edge,
    1084                            EdgeRefMap, ToMap, FromMap>(tmap, map));
    1085       return *this;
    1086     }
    1087 
    1088     /// \brief Make a copy of the given edge.
    1089     ///
    1090     /// Make a copy of the given edge.
    1091     GraphCopy& edge(TEdge& tedge, const Edge& sedge) {
    1092       _edge_maps.push_back(new _graph_utils_bits::ItemCopy<From, Edge,
    1093                            EdgeRefMap, TEdge>(tedge, sedge));
    1094       return *this;
    1095     }
    1096 
    1097     /// \brief Executes the copies.
    1098     ///
    1099     /// Executes the copies.
    1100     void run() {
    1101       NodeRefMap nodeRefMap(_from);
    1102       EdgeRefMap edgeRefMap(_from);
    1103       ArcRefMap arcRefMap(_to, _from, edgeRefMap, nodeRefMap);
    1104       _graph_utils_bits::GraphCopySelector<To>::
    1105         copy(_to, _from, nodeRefMap, edgeRefMap);
    1106       for (int i = 0; i < int(_node_maps.size()); ++i) {
    1107         _node_maps[i]->copy(_from, nodeRefMap);
    1108       }
    1109       for (int i = 0; i < int(_edge_maps.size()); ++i) {
    1110         _edge_maps[i]->copy(_from, edgeRefMap);
    1111       }
    1112       for (int i = 0; i < int(_arc_maps.size()); ++i) {
    1113         _arc_maps[i]->copy(_from, arcRefMap);
    1114       }
    1115     }
    1116 
    1117   private:
    1118 
    1119     const From& _from;
    1120     To& _to;
    1121 
    1122     std::vector<_graph_utils_bits::MapCopyBase<From, Node, NodeRefMap>* >
    1123     _node_maps;
    1124 
    1125     std::vector<_graph_utils_bits::MapCopyBase<From, Arc, ArcRefMap>* >
    1126     _arc_maps;
    1127 
    1128     std::vector<_graph_utils_bits::MapCopyBase<From, Edge, EdgeRefMap>* >
    1129     _edge_maps;
    1130 
    1131   };
    1132 
    1133   /// \brief Copy a graph to another graph.
    1134   ///
    1135   /// Copy a graph to another graph. The complete usage of the
    1136   /// function is detailed in the GraphCopy class, but a short
    1137   /// example shows a basic work:
    1138   ///\code
    1139   /// copyGraph(trg, src).nodeRef(nr).arcCrossRef(ecr).run();
    1140   ///\endcode
    1141   ///
    1142   /// After the copy the \c nr map will contain the mapping from the
    1143   /// nodes of the \c from graph to the nodes of the \c to graph and
    1144   /// \c ecr will contain the mapping from the arcs of the \c to graph
    1145   /// to the arcs of the \c from graph.
    1146   ///
    1147   /// \see GraphCopy
    1148   template <typename To, typename From>
    1149   GraphCopy<To, From>
    1150   copyGraph(To& to, const From& from) {
    1151     return GraphCopy<To, From>(to, from);
    1152   }
    1153 
    1154   /// @}
    1155 
    1156   /// \addtogroup graph_maps
    1157   /// @{
    1158 
    1159   /// Provides an immutable and unique id for each item in the graph.
    1160 
    1161   /// The IdMap class provides a unique and immutable id for each item of the
    1162   /// same type (e.g. node) in the graph. This id is <ul><li>\b unique:
    1163   /// different items (nodes) get different ids <li>\b immutable: the id of an
    1164   /// item (node) does not change (even if you delete other nodes).  </ul>
    1165   /// Through this map you get access (i.e. can read) the inner id values of
    1166   /// the items stored in the graph. This map can be inverted with its member
    1167   /// class \c InverseMap or with the \c operator() member.
    1168   ///
    1169   template <typename _Graph, typename _Item>
    1170   class IdMap {
    1171   public:
    1172     typedef _Graph Graph;
    1173     typedef int Value;
    1174     typedef _Item Item;
    1175     typedef _Item Key;
    1176 
    1177     /// \brief Constructor.
    1178     ///
    1179     /// Constructor of the map.
    1180     explicit IdMap(const Graph& graph) : _graph(&graph) {}
    1181 
    1182     /// \brief Gives back the \e id of the item.
    1183     ///
    1184     /// Gives back the immutable and unique \e id of the item.
    1185     int operator[](const Item& item) const { return _graph->id(item);}
    1186 
    1187     /// \brief Gives back the item by its id.
    1188     ///
    1189     /// Gives back the item by its id.
    1190     Item operator()(int id) { return _graph->fromId(id, Item()); }
    1191 
    1192   private:
    1193     const Graph* _graph;
    1194 
    1195   public:
    1196 
    1197     /// \brief The class represents the inverse of its owner (IdMap).
    1198     ///
    1199     /// The class represents the inverse of its owner (IdMap).
    1200     /// \see inverse()
    1201     class InverseMap {
    1202     public:
    1203 
    1204       /// \brief Constructor.
    1205       ///
    1206       /// Constructor for creating an id-to-item map.
    1207       explicit InverseMap(const Graph& graph) : _graph(&graph) {}
    1208 
    1209       /// \brief Constructor.
    1210       ///
    1211       /// Constructor for creating an id-to-item map.
    1212       explicit InverseMap(const IdMap& map) : _graph(map._graph) {}
    1213 
    1214       /// \brief Gives back the given item from its id.
    1215       ///
    1216       /// Gives back the given item from its id.
    1217       ///
    1218       Item operator[](int id) const { return _graph->fromId(id, Item());}
    1219 
    1220     private:
    1221       const Graph* _graph;
    1222     };
    1223 
    1224     /// \brief Gives back the inverse of the map.
    1225     ///
    1226     /// Gives back the inverse of the IdMap.
    1227     InverseMap inverse() const { return InverseMap(*_graph);}
    1228 
    1229   };
    1230 
    1231 
    1232   /// \brief General invertable graph-map type.
    1233 
    1234   /// This type provides simple invertable graph-maps.
    1235   /// The InvertableMap wraps an arbitrary ReadWriteMap
    1236   /// and if a key is set to a new value then store it
    1237   /// in the inverse map.
    1238   ///
    1239   /// The values of the map can be accessed
    1240   /// with stl compatible forward iterator.
    1241   ///
    1242   /// \tparam _Graph The graph type.
    1243   /// \tparam _Item The item type of the graph.
    1244   /// \tparam _Value The value type of the map.
    1245   ///
    1246   /// \see IterableValueMap
    1247   template <typename _Graph, typename _Item, typename _Value>
    1248   class InvertableMap : protected DefaultMap<_Graph, _Item, _Value> {
    1249   private:
    1250 
    1251     typedef DefaultMap<_Graph, _Item, _Value> Map;
    1252     typedef _Graph Graph;
    1253 
    1254     typedef std::map<_Value, _Item> Container;
    1255     Container _inv_map;
    1256 
    1257   public:
    1258 
    1259     /// The key type of InvertableMap (Node, Arc, Edge).
    1260     typedef typename Map::Key Key;
    1261     /// The value type of the InvertableMap.
    1262     typedef typename Map::Value Value;
    1263 
    1264 
    1265 
    1266     /// \brief Constructor.
    1267     ///
    1268     /// Construct a new InvertableMap for the graph.
    1269     ///
    1270     explicit InvertableMap(const Graph& graph) : Map(graph) {}
    1271 
    1272     /// \brief Forward iterator for values.
    1273     ///
    1274     /// This iterator is an stl compatible forward
    1275     /// iterator on the values of the map. The values can
    1276     /// be accessed in the [beginValue, endValue) range.
    1277     ///
    1278     class ValueIterator
    1279       : public std::iterator<std::forward_iterator_tag, Value> {
    1280       friend class InvertableMap;
    1281     private:
    1282       ValueIterator(typename Container::const_iterator _it)
    1283         : it(_it) {}
    1284     public:
    1285 
    1286       ValueIterator() {}
    1287 
    1288       ValueIterator& operator++() { ++it; return *this; }
    1289       ValueIterator operator++(int) {
    1290         ValueIterator tmp(*this);
    1291         operator++();
    1292         return tmp;
    1293       }
    1294 
    1295       const Value& operator*() const { return it->first; }
    1296       const Value* operator->() const { return &(it->first); }
    1297 
    1298       bool operator==(ValueIterator jt) const { return it == jt.it; }
    1299       bool operator!=(ValueIterator jt) const { return it != jt.it; }
    1300 
    1301     private:
    1302       typename Container::const_iterator it;
    1303     };
    1304 
    1305     /// \brief Returns an iterator to the first value.
    1306     ///
    1307     /// Returns an stl compatible iterator to the
    1308     /// first value of the map. The values of the
    1309     /// map can be accessed in the [beginValue, endValue)
    1310     /// range.
    1311     ValueIterator beginValue() const {
    1312       return ValueIterator(_inv_map.begin());
    1313     }
    1314 
    1315     /// \brief Returns an iterator after the last value.
    1316     ///
    1317     /// Returns an stl compatible iterator after the
    1318     /// last value of the map. The values of the
    1319     /// map can be accessed in the [beginValue, endValue)
    1320     /// range.
    1321     ValueIterator endValue() const {
    1322       return ValueIterator(_inv_map.end());
    1323     }
    1324 
    1325     /// \brief The setter function of the map.
    1326     ///
    1327     /// Sets the mapped value.
    1328     void set(const Key& key, const Value& val) {
    1329       Value oldval = Map::operator[](key);
    1330       typename Container::iterator it = _inv_map.find(oldval);
    1331       if (it != _inv_map.end() && it->second == key) {
    1332         _inv_map.erase(it);
    1333       }
    1334       _inv_map.insert(make_pair(val, key));
    1335       Map::set(key, val);
    1336     }
    1337 
    1338     /// \brief The getter function of the map.
    1339     ///
    1340     /// It gives back the value associated with the key.
    1341     typename MapTraits<Map>::ConstReturnValue
    1342     operator[](const Key& key) const {
    1343       return Map::operator[](key);
    1344     }
    1345 
    1346     /// \brief Gives back the item by its value.
    1347     ///
    1348     /// Gives back the item by its value.
    1349     Key operator()(const Value& key) const {
    1350       typename Container::const_iterator it = _inv_map.find(key);
    1351       return it != _inv_map.end() ? it->second : INVALID;
    1352     }
    1353 
    1354   protected:
    1355 
    1356     /// \brief Erase the key from the map.
    1357     ///
    1358     /// Erase the key to the map. It is called by the
    1359     /// \c AlterationNotifier.
    1360     virtual void erase(const Key& key) {
    1361       Value val = Map::operator[](key);
    1362       typename Container::iterator it = _inv_map.find(val);
    1363       if (it != _inv_map.end() && it->second == key) {
    1364         _inv_map.erase(it);
    1365       }
    1366       Map::erase(key);
    1367     }
    1368 
    1369     /// \brief Erase more keys from the map.
    1370     ///
    1371     /// Erase more keys from the map. It is called by the
    1372     /// \c AlterationNotifier.
    1373     virtual void erase(const std::vector<Key>& keys) {
    1374       for (int i = 0; i < int(keys.size()); ++i) {
    1375         Value val = Map::operator[](keys[i]);
    1376         typename Container::iterator it = _inv_map.find(val);
    1377         if (it != _inv_map.end() && it->second == keys[i]) {
    1378           _inv_map.erase(it);
    1379         }
    1380       }
    1381       Map::erase(keys);
    1382     }
    1383 
    1384     /// \brief Clear the keys from the map and inverse map.
    1385     ///
    1386     /// Clear the keys from the map and inverse map. It is called by the
    1387     /// \c AlterationNotifier.
    1388     virtual void clear() {
    1389       _inv_map.clear();
    1390       Map::clear();
    1391     }
    1392 
    1393   public:
    1394 
    1395     /// \brief The inverse map type.
    1396     ///
    1397     /// The inverse of this map. The subscript operator of the map
    1398     /// gives back always the item what was last assigned to the value.
    1399     class InverseMap {
    1400     public:
    1401       /// \brief Constructor of the InverseMap.
    1402       ///
    1403       /// Constructor of the InverseMap.
    1404       explicit InverseMap(const InvertableMap& inverted)
    1405         : _inverted(inverted) {}
    1406 
    1407       /// The value type of the InverseMap.
    1408       typedef typename InvertableMap::Key Value;
    1409       /// The key type of the InverseMap.
    1410       typedef typename InvertableMap::Value Key;
    1411 
    1412       /// \brief Subscript operator.
    1413       ///
    1414       /// Subscript operator. It gives back always the item
    1415       /// what was last assigned to the value.
    1416       Value operator[](const Key& key) const {
    1417         return _inverted(key);
    1418       }
    1419 
    1420     private:
    1421       const InvertableMap& _inverted;
    1422     };
    1423 
    1424     /// \brief It gives back the just readable inverse map.
    1425     ///
    1426     /// It gives back the just readable inverse map.
    1427     InverseMap inverse() const {
    1428       return InverseMap(*this);
    1429     }
    1430 
    1431 
    1432 
    1433   };
    1434 
    1435   /// \brief Provides a mutable, continuous and unique descriptor for each
    1436   /// item in the graph.
    1437   ///
    1438   /// The DescriptorMap class provides a unique and continuous (but mutable)
    1439   /// descriptor (id) for each item of the same type (e.g. node) in the
    1440   /// graph. This id is <ul><li>\b unique: different items (nodes) get
    1441   /// different ids <li>\b continuous: the range of the ids is the set of
    1442   /// integers between 0 and \c n-1, where \c n is the number of the items of
    1443   /// this type (e.g. nodes) (so the id of a node can change if you delete an
    1444   /// other node, i.e. this id is mutable).  </ul> This map can be inverted
    1445   /// with its member class \c InverseMap, or with the \c operator() member.
    1446   ///
    1447   /// \tparam _Graph The graph class the \c DescriptorMap belongs to.
    1448   /// \tparam _Item The Item is the Key of the Map. It may be Node, Arc or
    1449   /// Edge.
    1450   template <typename _Graph, typename _Item>
    1451   class DescriptorMap : protected DefaultMap<_Graph, _Item, int> {
    1452 
    1453     typedef _Item Item;
    1454     typedef DefaultMap<_Graph, _Item, int> Map;
    1455 
    1456   public:
    1457     /// The graph class of DescriptorMap.
    1458     typedef _Graph Graph;
    1459 
    1460     /// The key type of DescriptorMap (Node, Arc, Edge).
    1461     typedef typename Map::Key Key;
    1462     /// The value type of DescriptorMap.
    1463     typedef typename Map::Value Value;
    1464 
    1465     /// \brief Constructor.
    1466     ///
    1467     /// Constructor for descriptor map.
    1468     explicit DescriptorMap(const Graph& _graph) : Map(_graph) {
    1469       Item it;
    1470       const typename Map::Notifier* nf = Map::notifier();
    1471       for (nf->first(it); it != INVALID; nf->next(it)) {
    1472         Map::set(it, _inv_map.size());
    1473         _inv_map.push_back(it);
    1474       }
    1475     }
    1476 
    1477   protected:
    1478 
    1479     /// \brief Add a new key to the map.
    1480     ///
    1481     /// Add a new key to the map. It is called by the
    1482     /// \c AlterationNotifier.
    1483     virtual void add(const Item& item) {
    1484       Map::add(item);
    1485       Map::set(item, _inv_map.size());
    1486       _inv_map.push_back(item);
    1487     }
    1488 
    1489     /// \brief Add more new keys to the map.
    1490     ///
    1491     /// Add more new keys to the map. It is called by the
    1492     /// \c AlterationNotifier.
    1493     virtual void add(const std::vector<Item>& items) {
    1494       Map::add(items);
    1495       for (int i = 0; i < int(items.size()); ++i) {
    1496         Map::set(items[i], _inv_map.size());
    1497         _inv_map.push_back(items[i]);
    1498       }
    1499     }
    1500 
    1501     /// \brief Erase the key from the map.
    1502     ///
    1503     /// Erase the key from the map. It is called by the
    1504     /// \c AlterationNotifier.
    1505     virtual void erase(const Item& item) {
    1506       Map::set(_inv_map.back(), Map::operator[](item));
    1507       _inv_map[Map::operator[](item)] = _inv_map.back();
    1508       _inv_map.pop_back();
    1509       Map::erase(item);
    1510     }
    1511 
    1512     /// \brief Erase more keys from the map.
    1513     ///
    1514     /// Erase more keys from the map. It is called by the
    1515     /// \c AlterationNotifier.
    1516     virtual void erase(const std::vector<Item>& items) {
    1517       for (int i = 0; i < int(items.size()); ++i) {
    1518         Map::set(_inv_map.back(), Map::operator[](items[i]));
    1519         _inv_map[Map::operator[](items[i])] = _inv_map.back();
    1520         _inv_map.pop_back();
    1521       }
    1522       Map::erase(items);
    1523     }
    1524 
    1525     /// \brief Build the unique map.
    1526     ///
    1527     /// Build the unique map. It is called by the
    1528     /// \c AlterationNotifier.
    1529     virtual void build() {
    1530       Map::build();
    1531       Item it;
    1532       const typename Map::Notifier* nf = Map::notifier();
    1533       for (nf->first(it); it != INVALID; nf->next(it)) {
    1534         Map::set(it, _inv_map.size());
    1535         _inv_map.push_back(it);
    1536       }
    1537     }
    1538 
    1539     /// \brief Clear the keys from the map.
    1540     ///
    1541     /// Clear the keys from the map. It is called by the
    1542     /// \c AlterationNotifier.
    1543     virtual void clear() {
    1544       _inv_map.clear();
    1545       Map::clear();
    1546     }
    1547 
    1548   public:
    1549 
    1550     /// \brief Returns the maximal value plus one.
    1551     ///
    1552     /// Returns the maximal value plus one in the map.
    1553     unsigned int size() const {
    1554       return _inv_map.size();
    1555     }
    1556 
    1557     /// \brief Swaps the position of the two items in the map.
    1558     ///
    1559     /// Swaps the position of the two items in the map.
    1560     void swap(const Item& p, const Item& q) {
    1561       int pi = Map::operator[](p);
    1562       int qi = Map::operator[](q);
    1563       Map::set(p, qi);
    1564       _inv_map[qi] = p;
    1565       Map::set(q, pi);
    1566       _inv_map[pi] = q;
    1567     }
    1568 
    1569     /// \brief Gives back the \e descriptor of the item.
    1570     ///
    1571     /// Gives back the mutable and unique \e descriptor of the map.
    1572     int operator[](const Item& item) const {
    1573       return Map::operator[](item);
    1574     }
    1575 
    1576     /// \brief Gives back the item by its descriptor.
    1577     ///
    1578     /// Gives back th item by its descriptor.
    1579     Item operator()(int id) const {
    1580       return _inv_map[id];
    1581     }
    1582 
    1583   private:
    1584 
    1585     typedef std::vector<Item> Container;
    1586     Container _inv_map;
    1587 
    1588   public:
    1589     /// \brief The inverse map type of DescriptorMap.
    1590     ///
    1591     /// The inverse map type of DescriptorMap.
    1592     class InverseMap {
    1593     public:
    1594       /// \brief Constructor of the InverseMap.
    1595       ///
    1596       /// Constructor of the InverseMap.
    1597       explicit InverseMap(const DescriptorMap& inverted)
    1598         : _inverted(inverted) {}
    1599 
    1600 
    1601       /// The value type of the InverseMap.
    1602       typedef typename DescriptorMap::Key Value;
    1603       /// The key type of the InverseMap.
    1604       typedef typename DescriptorMap::Value Key;
    1605 
    1606       /// \brief Subscript operator.
    1607       ///
    1608       /// Subscript operator. It gives back the item
    1609       /// that the descriptor belongs to currently.
    1610       Value operator[](const Key& key) const {
    1611         return _inverted(key);
    1612       }
    1613 
    1614       /// \brief Size of the map.
    1615       ///
    1616       /// Returns the size of the map.
    1617       unsigned int size() const {
    1618         return _inverted.size();
    1619       }
    1620 
    1621     private:
    1622       const DescriptorMap& _inverted;
    1623     };
    1624 
    1625     /// \brief Gives back the inverse of the map.
    1626     ///
    1627     /// Gives back the inverse of the map.
    1628     const InverseMap inverse() const {
    1629       return InverseMap(*this);
    1630     }
    1631   };
    1632 
    1633   /// \brief Returns the source of the given arc.
    1634   ///
    1635   /// The SourceMap gives back the source Node of the given arc.
    1636   /// \see TargetMap
    1637   template <typename Digraph>
    1638   class SourceMap {
    1639   public:
    1640 
    1641     typedef typename Digraph::Node Value;
    1642     typedef typename Digraph::Arc Key;
    1643 
    1644     /// \brief Constructor
    1645     ///
    1646     /// Constructor
    1647     /// \param _digraph The digraph that the map belongs to.
    1648     explicit SourceMap(const Digraph& digraph) : _digraph(digraph) {}
    1649 
    1650     /// \brief The subscript operator.
    1651     ///
    1652     /// The subscript operator.
    1653     /// \param arc The arc
    1654     /// \return The source of the arc
    1655     Value operator[](const Key& arc) const {
    1656       return _digraph.source(arc);
    1657     }
    1658 
    1659   private:
    1660     const Digraph& _digraph;
    1661   };
    1662 
    1663   /// \brief Returns a \ref SourceMap class.
    1664   ///
    1665   /// This function just returns an \ref SourceMap class.
    1666   /// \relates SourceMap
    1667   template <typename Digraph>
    1668   inline SourceMap<Digraph> sourceMap(const Digraph& digraph) {
    1669     return SourceMap<Digraph>(digraph);
    1670   }
    1671 
    1672   /// \brief Returns the target of the given arc.
    1673   ///
    1674   /// The TargetMap gives back the target Node of the given arc.
    1675   /// \see SourceMap
    1676   template <typename Digraph>
    1677   class TargetMap {
    1678   public:
    1679 
    1680     typedef typename Digraph::Node Value;
    1681     typedef typename Digraph::Arc Key;
    1682 
    1683     /// \brief Constructor
    1684     ///
    1685     /// Constructor
    1686     /// \param _digraph The digraph that the map belongs to.
    1687     explicit TargetMap(const Digraph& digraph) : _digraph(digraph) {}
    1688 
    1689     /// \brief The subscript operator.
    1690     ///
    1691     /// The subscript operator.
    1692     /// \param e The arc
    1693     /// \return The target of the arc
    1694     Value operator[](const Key& e) const {
    1695       return _digraph.target(e);
    1696     }
    1697 
    1698   private:
    1699     const Digraph& _digraph;
    1700   };
    1701 
    1702   /// \brief Returns a \ref TargetMap class.
    1703   ///
    1704   /// This function just returns a \ref TargetMap class.
    1705   /// \relates TargetMap
    1706   template <typename Digraph>
    1707   inline TargetMap<Digraph> targetMap(const Digraph& digraph) {
    1708     return TargetMap<Digraph>(digraph);
    1709   }
    1710 
    1711   /// \brief Returns the "forward" directed arc view of an edge.
    1712   ///
    1713   /// Returns the "forward" directed arc view of an edge.
    1714   /// \see BackwardMap
    1715   template <typename Graph>
    1716   class ForwardMap {
    1717   public:
    1718 
    1719     typedef typename Graph::Arc Value;
    1720     typedef typename Graph::Edge Key;
    1721 
    1722     /// \brief Constructor
    1723     ///
    1724     /// Constructor
    1725     /// \param _graph The graph that the map belongs to.
    1726     explicit ForwardMap(const Graph& graph) : _graph(graph) {}
    1727 
    1728     /// \brief The subscript operator.
    1729     ///
    1730     /// The subscript operator.
    1731     /// \param key An edge
    1732     /// \return The "forward" directed arc view of edge
    1733     Value operator[](const Key& key) const {
    1734       return _graph.direct(key, true);
    1735     }
    1736 
    1737   private:
    1738     const Graph& _graph;
    1739   };
    1740 
    1741   /// \brief Returns a \ref ForwardMap class.
    1742   ///
    1743   /// This function just returns an \ref ForwardMap class.
    1744   /// \relates ForwardMap
    1745   template <typename Graph>
    1746   inline ForwardMap<Graph> forwardMap(const Graph& graph) {
    1747     return ForwardMap<Graph>(graph);
    1748   }
    1749 
    1750   /// \brief Returns the "backward" directed arc view of an edge.
    1751   ///
    1752   /// Returns the "backward" directed arc view of an edge.
    1753   /// \see ForwardMap
    1754   template <typename Graph>
    1755   class BackwardMap {
    1756   public:
    1757 
    1758     typedef typename Graph::Arc Value;
    1759     typedef typename Graph::Edge Key;
    1760 
    1761     /// \brief Constructor
    1762     ///
    1763     /// Constructor
    1764     /// \param _graph The graph that the map belongs to.
    1765     explicit BackwardMap(const Graph& graph) : _graph(graph) {}
    1766 
    1767     /// \brief The subscript operator.
    1768     ///
    1769     /// The subscript operator.
    1770     /// \param key An edge
    1771     /// \return The "backward" directed arc view of edge
    1772     Value operator[](const Key& key) const {
    1773       return _graph.direct(key, false);
    1774     }
    1775 
    1776   private:
    1777     const Graph& _graph;
    1778   };
    1779 
    1780   /// \brief Returns a \ref BackwardMap class
    1781 
    1782   /// This function just returns a \ref BackwardMap class.
    1783   /// \relates BackwardMap
    1784   template <typename Graph>
    1785   inline BackwardMap<Graph> backwardMap(const Graph& graph) {
    1786     return BackwardMap<Graph>(graph);
    1787   }
    1788 
    1789   /// \brief Potential difference map
    1790   ///
    1791   /// If there is an potential map on the nodes then we
    1792   /// can get an arc map as we get the substraction of the
    1793   /// values of the target and source.
    1794   template <typename Digraph, typename NodeMap>
    1795   class PotentialDifferenceMap {
    1796   public:
    1797     typedef typename Digraph::Arc Key;
    1798     typedef typename NodeMap::Value Value;
    1799 
    1800     /// \brief Constructor
    1801     ///
    1802     /// Contructor of the map
    1803     explicit PotentialDifferenceMap(const Digraph& digraph,
    1804                                     const NodeMap& potential)
    1805       : _digraph(digraph), _potential(potential) {}
    1806 
    1807     /// \brief Const subscription operator
    1808     ///
    1809     /// Const subscription operator
    1810     Value operator[](const Key& arc) const {
    1811       return _potential[_digraph.target(arc)] -
    1812         _potential[_digraph.source(arc)];
    1813     }
    1814 
    1815   private:
    1816     const Digraph& _digraph;
    1817     const NodeMap& _potential;
    1818   };
    1819 
    1820   /// \brief Returns a PotentialDifferenceMap.
    1821   ///
    1822   /// This function just returns a PotentialDifferenceMap.
    1823   /// \relates PotentialDifferenceMap
    1824   template <typename Digraph, typename NodeMap>
    1825   PotentialDifferenceMap<Digraph, NodeMap>
    1826   potentialDifferenceMap(const Digraph& digraph, const NodeMap& potential) {
    1827     return PotentialDifferenceMap<Digraph, NodeMap>(digraph, potential);
    1828   }
    1829 
    1830   /// \brief Map of the node in-degrees.
    1831   ///
    1832   /// This map returns the in-degree of a node. Once it is constructed,
    1833   /// the degrees are stored in a standard NodeMap, so each query is done
    1834   /// in constant time. On the other hand, the values are updated automatically
    1835   /// whenever the digraph changes.
    1836   ///
    1837   /// \warning Besides addNode() and addArc(), a digraph structure may provide
    1838   /// alternative ways to modify the digraph. The correct behavior of InDegMap
    1839   /// is not guarantied if these additional features are used. For example
    1840   /// the functions \ref ListDigraph::changeSource() "changeSource()",
    1841   /// \ref ListDigraph::changeTarget() "changeTarget()" and
    1842   /// \ref ListDigraph::reverseArc() "reverseArc()"
    1843   /// of \ref ListDigraph will \e not update the degree values correctly.
    1844   ///
    1845   /// \sa OutDegMap
    1846 
    1847   template <typename _Digraph>
    1848   class InDegMap
    1849     : protected ItemSetTraits<_Digraph, typename _Digraph::Arc>
    1850       ::ItemNotifier::ObserverBase {
    1851 
    1852   public:
    1853 
    1854     typedef _Digraph Digraph;
    1855     typedef int Value;
    1856     typedef typename Digraph::Node Key;
    1857 
    1858     typedef typename ItemSetTraits<Digraph, typename Digraph::Arc>
    1859     ::ItemNotifier::ObserverBase Parent;
    1860 
    1861   private:
    1862 
    1863     class AutoNodeMap : public DefaultMap<Digraph, Key, int> {
    1864     public:
    1865 
    1866       typedef DefaultMap<Digraph, Key, int> Parent;
    1867 
    1868       AutoNodeMap(const Digraph& digraph) : Parent(digraph, 0) {}
    1869 
    1870       virtual void add(const Key& key) {
    1871         Parent::add(key);
    1872         Parent::set(key, 0);
    1873       }
    1874 
    1875       virtual void add(const std::vector<Key>& keys) {
    1876         Parent::add(keys);
    1877         for (int i = 0; i < int(keys.size()); ++i) {
    1878           Parent::set(keys[i], 0);
    1879         }
    1880       }
    1881 
    1882       virtual void build() {
    1883         Parent::build();
    1884         Key it;
    1885         typename Parent::Notifier* nf = Parent::notifier();
    1886         for (nf->first(it); it != INVALID; nf->next(it)) {
    1887           Parent::set(it, 0);
    1888         }
    1889       }
    1890     };
    1891 
    1892   public:
    1893 
    1894     /// \brief Constructor.
    1895     ///
    1896     /// Constructor for creating in-degree map.
    1897     explicit InDegMap(const Digraph& digraph)
    1898       : _digraph(digraph), _deg(digraph) {
    1899       Parent::attach(_digraph.notifier(typename Digraph::Arc()));
    1900 
    1901       for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
    1902         _deg[it] = countInArcs(_digraph, it);
    1903       }
    1904     }
    1905 
    1906     /// Gives back the in-degree of a Node.
    1907     int operator[](const Key& key) const {
    1908       return _deg[key];
    1909     }
    1910 
    1911   protected:
    1912 
    1913     typedef typename Digraph::Arc Arc;
    1914 
    1915     virtual void add(const Arc& arc) {
    1916       ++_deg[_digraph.target(arc)];
    1917     }
    1918 
    1919     virtual void add(const std::vector<Arc>& arcs) {
    1920       for (int i = 0; i < int(arcs.size()); ++i) {
    1921         ++_deg[_digraph.target(arcs[i])];
    1922       }
    1923     }
    1924 
    1925     virtual void erase(const Arc& arc) {
    1926       --_deg[_digraph.target(arc)];
    1927     }
    1928 
    1929     virtual void erase(const std::vector<Arc>& arcs) {
    1930       for (int i = 0; i < int(arcs.size()); ++i) {
    1931         --_deg[_digraph.target(arcs[i])];
    1932       }
    1933     }
    1934 
    1935     virtual void build() {
    1936       for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
    1937         _deg[it] = countInArcs(_digraph, it);
    1938       }
    1939     }
    1940 
    1941     virtual void clear() {
    1942       for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
    1943         _deg[it] = 0;
    1944       }
    1945     }
    1946   private:
    1947 
    1948     const Digraph& _digraph;
    1949     AutoNodeMap _deg;
    1950   };
    1951 
    1952   /// \brief Map of the node out-degrees.
    1953   ///
    1954   /// This map returns the out-degree of a node. Once it is constructed,
    1955   /// the degrees are stored in a standard NodeMap, so each query is done
    1956   /// in constant time. On the other hand, the values are updated automatically
    1957   /// whenever the digraph changes.
    1958   ///
    1959   /// \warning Besides addNode() and addArc(), a digraph structure may provide
    1960   /// alternative ways to modify the digraph. The correct behavior of OutDegMap
    1961   /// is not guarantied if these additional features are used. For example
    1962   /// the functions \ref ListDigraph::changeSource() "changeSource()",
    1963   /// \ref ListDigraph::changeTarget() "changeTarget()" and
    1964   /// \ref ListDigraph::reverseArc() "reverseArc()"
    1965   /// of \ref ListDigraph will \e not update the degree values correctly.
    1966   ///
    1967   /// \sa InDegMap
    1968 
    1969   template <typename _Digraph>
    1970   class OutDegMap
    1971     : protected ItemSetTraits<_Digraph, typename _Digraph::Arc>
    1972       ::ItemNotifier::ObserverBase {
    1973 
    1974   public:
    1975 
    1976     typedef _Digraph Digraph;
    1977     typedef int Value;
    1978     typedef typename Digraph::Node Key;
    1979 
    1980     typedef typename ItemSetTraits<Digraph, typename Digraph::Arc>
    1981     ::ItemNotifier::ObserverBase Parent;
    1982 
    1983   private:
    1984 
    1985     class AutoNodeMap : public DefaultMap<Digraph, Key, int> {
    1986     public:
    1987 
    1988       typedef DefaultMap<Digraph, Key, int> Parent;
    1989 
    1990       AutoNodeMap(const Digraph& digraph) : Parent(digraph, 0) {}
    1991 
    1992       virtual void add(const Key& key) {
    1993         Parent::add(key);
    1994         Parent::set(key, 0);
    1995       }
    1996       virtual void add(const std::vector<Key>& keys) {
    1997         Parent::add(keys);
    1998         for (int i = 0; i < int(keys.size()); ++i) {
    1999           Parent::set(keys[i], 0);
    2000         }
    2001       }
    2002       virtual void build() {
    2003         Parent::build();
    2004         Key it;
    2005         typename Parent::Notifier* nf = Parent::notifier();
    2006         for (nf->first(it); it != INVALID; nf->next(it)) {
    2007           Parent::set(it, 0);
    2008         }
    2009       }
    2010     };
    2011 
    2012   public:
    2013 
    2014     /// \brief Constructor.
    2015     ///
    2016     /// Constructor for creating out-degree map.
    2017     explicit OutDegMap(const Digraph& digraph)
    2018       : _digraph(digraph), _deg(digraph) {
    2019       Parent::attach(_digraph.notifier(typename Digraph::Arc()));
    2020 
    2021       for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
    2022         _deg[it] = countOutArcs(_digraph, it);
    2023       }
    2024     }
    2025 
    2026     /// Gives back the out-degree of a Node.
    2027     int operator[](const Key& key) const {
    2028       return _deg[key];
    2029     }
    2030 
    2031   protected:
    2032 
    2033     typedef typename Digraph::Arc Arc;
    2034 
    2035     virtual void add(const Arc& arc) {
    2036       ++_deg[_digraph.source(arc)];
    2037     }
    2038 
    2039     virtual void add(const std::vector<Arc>& arcs) {
    2040       for (int i = 0; i < int(arcs.size()); ++i) {
    2041         ++_deg[_digraph.source(arcs[i])];
    2042       }
    2043     }
    2044 
    2045     virtual void erase(const Arc& arc) {
    2046       --_deg[_digraph.source(arc)];
    2047     }
    2048 
    2049     virtual void erase(const std::vector<Arc>& arcs) {
    2050       for (int i = 0; i < int(arcs.size()); ++i) {
    2051         --_deg[_digraph.source(arcs[i])];
    2052       }
    2053     }
    2054 
    2055     virtual void build() {
    2056       for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
    2057         _deg[it] = countOutArcs(_digraph, it);
    2058       }
    2059     }
    2060 
    2061     virtual void clear() {
    2062       for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
    2063         _deg[it] = 0;
    2064       }
    2065     }
    2066   private:
    2067 
    2068     const Digraph& _digraph;
    2069     AutoNodeMap _deg;
    2070   };
    2071 
    2072 
    2073   ///Dynamic arc look up between given endpoints.
    2074 
    2075   ///\ingroup gutils
    2076   ///Using this class, you can find an arc in a digraph from a given
    2077   ///source to a given target in amortized time <em>O(log d)</em>,
    2078   ///where <em>d</em> is the out-degree of the source node.
    2079   ///
    2080   ///It is possible to find \e all parallel arcs between two nodes with
    2081   ///the \c findFirst() and \c findNext() members.
    2082   ///
    2083   ///See the \ref ArcLookUp and \ref AllArcLookUp classes if your
    2084   ///digraph is not changed so frequently.
    2085   ///
    2086   ///This class uses a self-adjusting binary search tree, Sleator's
    2087   ///and Tarjan's Splay tree for guarantee the logarithmic amortized
    2088   ///time bound for arc lookups. This class also guarantees the
    2089   ///optimal time bound in a constant factor for any distribution of
    2090   ///queries.
    2091   ///
    2092   ///\tparam G The type of the underlying digraph.
    2093   ///
    2094   ///\sa ArcLookUp
    2095   ///\sa AllArcLookUp
    2096   template<class G>
    2097   class DynArcLookUp
    2098     : protected ItemSetTraits<G, typename G::Arc>::ItemNotifier::ObserverBase
    2099   {
    2100   public:
    2101     typedef typename ItemSetTraits<G, typename G::Arc>
    2102     ::ItemNotifier::ObserverBase Parent;
    2103 
    2104     TEMPLATE_DIGRAPH_TYPEDEFS(G);
    2105     typedef G Digraph;
    2106 
    2107   protected:
    2108 
    2109     class AutoNodeMap : public DefaultMap<G, Node, Arc> {
    2110     public:
    2111 
    2112       typedef DefaultMap<G, Node, Arc> Parent;
    2113 
    2114       AutoNodeMap(const G& digraph) : Parent(digraph, INVALID) {}
    2115 
    2116       virtual void add(const Node& node) {
    2117         Parent::add(node);
    2118         Parent::set(node, INVALID);
    2119       }
    2120 
    2121       virtual void add(const std::vector<Node>& nodes) {
    2122         Parent::add(nodes);
    2123         for (int i = 0; i < int(nodes.size()); ++i) {
    2124           Parent::set(nodes[i], INVALID);
    2125         }
    2126       }
    2127 
    2128       virtual void build() {
    2129         Parent::build();
    2130         Node it;
    2131         typename Parent::Notifier* nf = Parent::notifier();
    2132         for (nf->first(it); it != INVALID; nf->next(it)) {
    2133           Parent::set(it, INVALID);
    2134         }
    2135       }
    2136     };
    2137 
    2138     const Digraph &_g;
    2139     AutoNodeMap _head;
    2140     typename Digraph::template ArcMap<Arc> _parent;
    2141     typename Digraph::template ArcMap<Arc> _left;
    2142     typename Digraph::template ArcMap<Arc> _right;
    2143 
    2144     class ArcLess {
    2145       const Digraph &g;
    2146     public:
    2147       ArcLess(const Digraph &_g) : g(_g) {}
    2148       bool operator()(Arc a,Arc b) const
    2149       {
    2150         return g.target(a)<g.target(b);
    2151       }
    2152     };
    2153 
    2154   public:
    2155 
    2156     ///Constructor
    2157 
    2158     ///Constructor.
    2159     ///
    2160     ///It builds up the search database.
    2161     DynArcLookUp(const Digraph &g)
    2162       : _g(g),_head(g),_parent(g),_left(g),_right(g)
    2163     {
    2164       Parent::attach(_g.notifier(typename Digraph::Arc()));
    2165       refresh();
    2166     }
    2167 
    2168   protected:
    2169 
    2170     virtual void add(const Arc& arc) {
    2171       insert(arc);
    2172     }
    2173 
    2174     virtual void add(const std::vector<Arc>& arcs) {
    2175       for (int i = 0; i < int(arcs.size()); ++i) {
    2176         insert(arcs[i]);
    2177       }
    2178     }
    2179 
    2180     virtual void erase(const Arc& arc) {
    2181       remove(arc);
    2182     }
    2183 
    2184     virtual void erase(const std::vector<Arc>& arcs) {
    2185       for (int i = 0; i < int(arcs.size()); ++i) {
    2186         remove(arcs[i]);
    2187       }
    2188     }
    2189 
    2190     virtual void build() {
    2191       refresh();
    2192     }
    2193 
    2194     virtual void clear() {
    2195       for(NodeIt n(_g);n!=INVALID;++n) {
    2196         _head.set(n, INVALID);
    2197       }
    2198     }
    2199 
    2200     void insert(Arc arc) {
    2201       Node s = _g.source(arc);
    2202       Node t = _g.target(arc);
    2203       _left.set(arc, INVALID);
    2204       _right.set(arc, INVALID);
    2205 
    2206       Arc e = _head[s];
    2207       if (e == INVALID) {
    2208         _head.set(s, arc);
    2209         _parent.set(arc, INVALID);
    2210         return;
    2211       }
    2212       while (true) {
    2213         if (t < _g.target(e)) {
    2214           if (_left[e] == INVALID) {
    2215             _left.set(e, arc);
    2216             _parent.set(arc, e);
    2217             splay(arc);
    2218             return;
    2219           } else {
    2220             e = _left[e];
    2221           }
    2222         } else {
    2223           if (_right[e] == INVALID) {
    2224             _right.set(e, arc);
    2225             _parent.set(arc, e);
    2226             splay(arc);
    2227             return;
    2228           } else {
    2229             e = _right[e];
    2230           }
    2231         }
    2232       }
    2233     }
    2234 
    2235     void remove(Arc arc) {
    2236       if (_left[arc] == INVALID) {
    2237         if (_right[arc] != INVALID) {
    2238           _parent.set(_right[arc], _parent[arc]);
    2239         }
    2240         if (_parent[arc] != INVALID) {
    2241           if (_left[_parent[arc]] == arc) {
    2242             _left.set(_parent[arc], _right[arc]);
    2243           } else {
    2244             _right.set(_parent[arc], _right[arc]);
    2245           }
    2246         } else {
    2247           _head.set(_g.source(arc), _right[arc]);
    2248         }
    2249       } else if (_right[arc] == INVALID) {
    2250         _parent.set(_left[arc], _parent[arc]);
    2251         if (_parent[arc] != INVALID) {
    2252           if (_left[_parent[arc]] == arc) {
    2253             _left.set(_parent[arc], _left[arc]);
    2254           } else {
    2255             _right.set(_parent[arc], _left[arc]);
    2256           }
    2257         } else {
    2258           _head.set(_g.source(arc), _left[arc]);
    2259         }
    2260       } else {
    2261         Arc e = _left[arc];
    2262         if (_right[e] != INVALID) {
    2263           e = _right[e];
    2264           while (_right[e] != INVALID) {
    2265             e = _right[e];
    2266           }
    2267           Arc s = _parent[e];
    2268           _right.set(_parent[e], _left[e]);
    2269           if (_left[e] != INVALID) {
    2270             _parent.set(_left[e], _parent[e]);
    2271           }
    2272 
    2273           _left.set(e, _left[arc]);
    2274           _parent.set(_left[arc], e);
    2275           _right.set(e, _right[arc]);
    2276           _parent.set(_right[arc], e);
    2277 
    2278           _parent.set(e, _parent[arc]);
    2279           if (_parent[arc] != INVALID) {
    2280             if (_left[_parent[arc]] == arc) {
    2281               _left.set(_parent[arc], e);
    2282             } else {
    2283               _right.set(_parent[arc], e);
    2284             }
    2285           }
    2286           splay(s);
    2287         } else {
    2288           _right.set(e, _right[arc]);
    2289           _parent.set(_right[arc], e);
    2290 
    2291           if (_parent[arc] != INVALID) {
    2292             if (_left[_parent[arc]] == arc) {
    2293               _left.set(_parent[arc], e);
    2294             } else {
    2295               _right.set(_parent[arc], e);
    2296             }
    2297           } else {
    2298             _head.set(_g.source(arc), e);
    2299           }
    2300         }
    2301       }
    2302     }
    2303 
    2304     Arc refreshRec(std::vector<Arc> &v,int a,int b)
    2305     {
    2306       int m=(a+b)/2;
    2307       Arc me=v[m];
    2308       if (a < m) {
    2309         Arc left = refreshRec(v,a,m-1);
    2310         _left.set(me, left);
    2311         _parent.set(left, me);
    2312       } else {
    2313         _left.set(me, INVALID);
    2314       }
    2315       if (m < b) {
    2316         Arc right = refreshRec(v,m+1,b);
    2317         _right.set(me, right);
    2318         _parent.set(right, me);
    2319       } else {
    2320         _right.set(me, INVALID);
    2321       }
    2322       return me;
    2323     }
    2324 
    2325     void refresh() {
    2326       for(NodeIt n(_g);n!=INVALID;++n) {
    2327         std::vector<Arc> v;
    2328         for(OutArcIt e(_g,n);e!=INVALID;++e) v.push_back(e);
    2329         if(v.size()) {
    2330           std::sort(v.begin(),v.end(),ArcLess(_g));
    2331           Arc head = refreshRec(v,0,v.size()-1);
    2332           _head.set(n, head);
    2333           _parent.set(head, INVALID);
    2334         }
    2335         else _head.set(n, INVALID);
    2336       }
    2337     }
    2338 
    2339     void zig(Arc v) {
    2340       Arc w = _parent[v];
    2341       _parent.set(v, _parent[w]);
    2342       _parent.set(w, v);
    2343       _left.set(w, _right[v]);
    2344       _right.set(v, w);
    2345       if (_parent[v] != INVALID) {
    2346         if (_right[_parent[v]] == w) {
    2347           _right.set(_parent[v], v);
    2348         } else {
    2349           _left.set(_parent[v], v);
    2350         }
    2351       }
    2352       if (_left[w] != INVALID){
    2353         _parent.set(_left[w], w);
    2354       }
    2355     }
    2356 
    2357     void zag(Arc v) {
    2358       Arc w = _parent[v];
    2359       _parent.set(v, _parent[w]);
    2360       _parent.set(w, v);
    2361       _right.set(w, _left[v]);
    2362       _left.set(v, w);
    2363       if (_parent[v] != INVALID){
    2364         if (_left[_parent[v]] == w) {
    2365           _left.set(_parent[v], v);
    2366         } else {
    2367           _right.set(_parent[v], v);
    2368         }
    2369       }
    2370       if (_right[w] != INVALID){
    2371         _parent.set(_right[w], w);
    2372       }
    2373     }
    2374 
    2375     void splay(Arc v) {
    2376       while (_parent[v] != INVALID) {
    2377         if (v == _left[_parent[v]]) {
    2378           if (_parent[_parent[v]] == INVALID) {
    2379             zig(v);
    2380           } else {
    2381             if (_parent[v] == _left[_parent[_parent[v]]]) {
    2382               zig(_parent[v]);
    2383               zig(v);
    2384             } else {
    2385               zig(v);
    2386               zag(v);
    2387             }
    2388           }
    2389         } else {
    2390           if (_parent[_parent[v]] == INVALID) {
    2391             zag(v);
    2392           } else {
    2393             if (_parent[v] == _left[_parent[_parent[v]]]) {
    2394               zag(v);
    2395               zig(v);
    2396             } else {
    2397               zag(_parent[v]);
    2398               zag(v);
    2399             }
    2400           }
    2401         }
    2402       }
    2403       _head[_g.source(v)] = v;
    2404     }
    2405 
    2406 
    2407   public:
    2408 
    2409     ///Find an arc between two nodes.
    2410 
    2411     ///Find an arc between two nodes in time <em>O(</em>log<em>d)</em>, where
    2412     /// <em>d</em> is the number of outgoing arcs of \c s.
    2413     ///\param s The source node
    2414     ///\param t The target node
    2415     ///\return An arc from \c s to \c t if there exists,
    2416     ///\ref INVALID otherwise.
    2417     Arc operator()(Node s, Node t) const
    2418     {
    2419       Arc a = _head[s];
    2420       while (true) {
    2421         if (_g.target(a) == t) {
    2422           const_cast<DynArcLookUp&>(*this).splay(a);
    2423           return a;
    2424         } else if (t < _g.target(a)) {
    2425           if (_left[a] == INVALID) {
    2426             const_cast<DynArcLookUp&>(*this).splay(a);
    2427             return INVALID;
    2428           } else {
    2429             a = _left[a];
    2430           }
    2431         } else  {
    2432           if (_right[a] == INVALID) {
    2433             const_cast<DynArcLookUp&>(*this).splay(a);
    2434             return INVALID;
    2435           } else {
    2436             a = _right[a];
    2437           }
    2438         }
    2439       }
    2440     }
    2441 
    2442     ///Find the first arc between two nodes.
    2443 
    2444     ///Find the first arc between two nodes in time
    2445     /// <em>O(</em>log<em>d)</em>, where <em>d</em> is the number of
    2446     /// outgoing arcs of \c s.
    2447     ///\param s The source node
    2448     ///\param t The target node
    2449     ///\return An arc from \c s to \c t if there exists, \ref INVALID
    2450     /// otherwise.
    2451     Arc findFirst(Node s, Node t) const
    2452     {
    2453       Arc a = _head[s];
    2454       Arc r = INVALID;
    2455       while (true) {
    2456         if (_g.target(a) < t) {
    2457           if (_right[a] == INVALID) {
    2458             const_cast<DynArcLookUp&>(*this).splay(a);
    2459             return r;
    2460           } else {
    2461             a = _right[a];
    2462           }
    2463         } else {
    2464           if (_g.target(a) == t) {
    2465             r = a;
    2466           }
    2467           if (_left[a] == INVALID) {
    2468             const_cast<DynArcLookUp&>(*this).splay(a);
    2469             return r;
    2470           } else {
    2471             a = _left[a];
    2472           }
    2473         }
    2474       }
    2475     }
    2476 
    2477     ///Find the next arc between two nodes.
    2478 
    2479     ///Find the next arc between two nodes in time
    2480     /// <em>O(</em>log<em>d)</em>, where <em>d</em> is the number of
    2481     /// outgoing arcs of \c s.
    2482     ///\param s The source node
    2483     ///\param t The target node
    2484     ///\return An arc from \c s to \c t if there exists, \ref INVALID
    2485     /// otherwise.
    2486 
    2487     ///\note If \c e is not the result of the previous \c findFirst()
    2488     ///operation then the amorized time bound can not be guaranteed.
    2489 #ifdef DOXYGEN
    2490     Arc findNext(Node s, Node t, Arc a) const
    2491 #else
    2492     Arc findNext(Node, Node t, Arc a) const
    2493 #endif
    2494     {
    2495       if (_right[a] != INVALID) {
    2496         a = _right[a];
    2497         while (_left[a] != INVALID) {
    2498           a = _left[a];
    2499         }
    2500         const_cast<DynArcLookUp&>(*this).splay(a);
    2501       } else {
    2502         while (_parent[a] != INVALID && _right[_parent[a]] ==  a) {
    2503           a = _parent[a];
    2504         }
    2505         if (_parent[a] == INVALID) {
    2506           return INVALID;
    2507         } else {
    2508           a = _parent[a];
    2509           const_cast<DynArcLookUp&>(*this).splay(a);
    2510         }
    2511       }
    2512       if (_g.target(a) == t) return a;
    2513       else return INVALID;
    2514     }
    2515 
    2516   };
    2517 
    2518   ///Fast arc look up between given endpoints.
    2519 
    2520   ///\ingroup gutils
    2521   ///Using this class, you can find an arc in a digraph from a given
    2522   ///source to a given target in time <em>O(log d)</em>,
    2523   ///where <em>d</em> is the out-degree of the source node.
    2524   ///
    2525   ///It is not possible to find \e all parallel arcs between two nodes.
    2526   ///Use \ref AllArcLookUp for this purpose.
    2527   ///
    2528   ///\warning This class is static, so you should refresh() (or at least
    2529   ///refresh(Node)) this data structure
    2530   ///whenever the digraph changes. This is a time consuming (superlinearly
    2531   ///proportional (<em>O(m</em>log<em>m)</em>) to the number of arcs).
    2532   ///
    2533   ///\tparam G The type of the underlying digraph.
    2534   ///
    2535   ///\sa DynArcLookUp
    2536   ///\sa AllArcLookUp
    2537   template<class G>
    2538   class ArcLookUp
    2539   {
    2540   public:
    2541     TEMPLATE_DIGRAPH_TYPEDEFS(G);
    2542     typedef G Digraph;
    2543 
    2544   protected:
    2545     const Digraph &_g;
    2546     typename Digraph::template NodeMap<Arc> _head;
    2547     typename Digraph::template ArcMap<Arc> _left;
    2548     typename Digraph::template ArcMap<Arc> _right;
    2549 
    2550     class ArcLess {
    2551       const Digraph &g;
    2552     public:
    2553       ArcLess(const Digraph &_g) : g(_g) {}
    2554       bool operator()(Arc a,Arc b) const
    2555       {
    2556         return g.target(a)<g.target(b);
    2557       }
    2558     };
    2559 
    2560   public:
    2561 
    2562     ///Constructor
    2563 
    2564     ///Constructor.
    2565     ///
    2566     ///It builds up the search database, which remains valid until the digraph
    2567     ///changes.
    2568     ArcLookUp(const Digraph &g) :_g(g),_head(g),_left(g),_right(g) {refresh();}
    2569 
    2570   private:
    2571     Arc refreshRec(std::vector<Arc> &v,int a,int b)
    2572     {
    2573       int m=(a+b)/2;
    2574       Arc me=v[m];
    2575       _left[me] = a<m?refreshRec(v,a,m-1):INVALID;
    2576       _right[me] = m<b?refreshRec(v,m+1,b):INVALID;
    2577       return me;
    2578     }
    2579   public:
    2580     ///Refresh the data structure at a node.
    2581 
    2582     ///Build up the search database of node \c n.
    2583     ///
    2584     ///It runs in time <em>O(d</em>log<em>d)</em>, where <em>d</em> is
    2585     ///the number of the outgoing arcs of \c n.
    2586     void refresh(Node n)
    2587     {
    2588       std::vector<Arc> v;
    2589       for(OutArcIt e(_g,n);e!=INVALID;++e) v.push_back(e);
    2590       if(v.size()) {
    2591         std::sort(v.begin(),v.end(),ArcLess(_g));
    2592         _head[n]=refreshRec(v,0,v.size()-1);
    2593       }
    2594       else _head[n]=INVALID;
    2595     }
    2596     ///Refresh the full data structure.
    2597 
    2598     ///Build up the full search database. In fact, it simply calls
    2599     ///\ref refresh(Node) "refresh(n)" for each node \c n.
    2600     ///
    2601     ///It runs in time <em>O(m</em>log<em>D)</em>, where <em>m</em> is
    2602     ///the number of the arcs of \c n and <em>D</em> is the maximum
    2603     ///out-degree of the digraph.
    2604 
    2605     void refresh()
    2606     {
    2607       for(NodeIt n(_g);n!=INVALID;++n) refresh(n);
    2608     }
    2609 
    2610     ///Find an arc between two nodes.
    2611 
    2612     ///Find an arc between two nodes in time <em>O(</em>log<em>d)</em>, where
    2613     /// <em>d</em> is the number of outgoing arcs of \c s.
    2614     ///\param s The source node
    2615     ///\param t The target node
    2616     ///\return An arc from \c s to \c t if there exists,
    2617     ///\ref INVALID otherwise.
    2618     ///
    2619     ///\warning If you change the digraph, refresh() must be called before using
    2620     ///this operator. If you change the outgoing arcs of
    2621     ///a single node \c n, then
    2622     ///\ref refresh(Node) "refresh(n)" is enough.
    2623     ///
    2624     Arc operator()(Node s, Node t) const
    2625     {
    2626       Arc e;
    2627       for(e=_head[s];
    2628           e!=INVALID&&_g.target(e)!=t;
    2629           e = t < _g.target(e)?_left[e]:_right[e]) ;
    2630       return e;
    2631     }
    2632 
    2633   };
    2634 
    2635   ///Fast look up of all arcs between given endpoints.
    2636 
    2637   ///\ingroup gutils
    2638   ///This class is the same as \ref ArcLookUp, with the addition
    2639   ///that it makes it possible to find all arcs between given endpoints.
    2640   ///
    2641   ///\warning This class is static, so you should refresh() (or at least
    2642   ///refresh(Node)) this data structure
    2643   ///whenever the digraph changes. This is a time consuming (superlinearly
    2644   ///proportional (<em>O(m</em>log<em>m)</em>) to the number of arcs).
    2645   ///
    2646   ///\tparam G The type of the underlying digraph.
    2647   ///
    2648   ///\sa DynArcLookUp
    2649   ///\sa ArcLookUp
    2650   template<class G>
    2651   class AllArcLookUp : public ArcLookUp<G>
    2652   {
    2653     using ArcLookUp<G>::_g;
    2654     using ArcLookUp<G>::_right;
    2655     using ArcLookUp<G>::_left;
    2656     using ArcLookUp<G>::_head;
    2657 
    2658     TEMPLATE_DIGRAPH_TYPEDEFS(G);
    2659     typedef G Digraph;
    2660 
    2661     typename Digraph::template ArcMap<Arc> _next;
    2662 
    2663     Arc refreshNext(Arc head,Arc next=INVALID)
    2664     {
    2665       if(head==INVALID) return next;
    2666       else {
    2667         next=refreshNext(_right[head],next);
    2668 //         _next[head]=next;
    2669         _next[head]=( next!=INVALID && _g.target(next)==_g.target(head))
    2670           ? next : INVALID;
    2671         return refreshNext(_left[head],head);
    2672       }
    2673     }
    2674 
    2675     void refreshNext()
    2676     {
    2677       for(NodeIt n(_g);n!=INVALID;++n) refreshNext(_head[n]);
    2678     }
    2679 
    2680   public:
    2681     ///Constructor
    2682 
    2683     ///Constructor.
    2684     ///
    2685     ///It builds up the search database, which remains valid until the digraph
    2686     ///changes.
    2687     AllArcLookUp(const Digraph &g) : ArcLookUp<G>(g), _next(g) {refreshNext();}
    2688 
    2689     ///Refresh the data structure at a node.
    2690 
    2691     ///Build up the search database of node \c n.
    2692     ///
    2693     ///It runs in time <em>O(d</em>log<em>d)</em>, where <em>d</em> is
    2694     ///the number of the outgoing arcs of \c n.
    2695 
    2696     void refresh(Node n)
    2697     {
    2698       ArcLookUp<G>::refresh(n);
    2699       refreshNext(_head[n]);
    2700     }
    2701 
    2702     ///Refresh the full data structure.
    2703 
    2704     ///Build up the full search database. In fact, it simply calls
    2705     ///\ref refresh(Node) "refresh(n)" for each node \c n.
    2706     ///
    2707     ///It runs in time <em>O(m</em>log<em>D)</em>, where <em>m</em> is
    2708     ///the number of the arcs of \c n and <em>D</em> is the maximum
    2709     ///out-degree of the digraph.
    2710 
    2711     void refresh()
    2712     {
    2713       for(NodeIt n(_g);n!=INVALID;++n) refresh(_head[n]);
    2714     }
    2715 
    2716     ///Find an arc between two nodes.
    2717 
    2718     ///Find an arc between two nodes.
    2719     ///\param s The source node
    2720     ///\param t The target node
    2721     ///\param prev The previous arc between \c s and \c t. It it is INVALID or
    2722     ///not given, the operator finds the first appropriate arc.
    2723     ///\return An arc from \c s to \c t after \c prev or
    2724     ///\ref INVALID if there is no more.
    2725     ///
    2726     ///For example, you can count the number of arcs from \c u to \c v in the
    2727     ///following way.
    2728     ///\code
    2729     ///AllArcLookUp<ListDigraph> ae(g);
    2730     ///...
    2731     ///int n=0;
    2732     ///for(Arc e=ae(u,v);e!=INVALID;e=ae(u,v,e)) n++;
    2733     ///\endcode
    2734     ///
    2735     ///Finding the first arc take <em>O(</em>log<em>d)</em> time, where
    2736     /// <em>d</em> is the number of outgoing arcs of \c s. Then, the
    2737     ///consecutive arcs are found in constant time.
    2738     ///
    2739     ///\warning If you change the digraph, refresh() must be called before using
    2740     ///this operator. If you change the outgoing arcs of
    2741     ///a single node \c n, then
    2742     ///\ref refresh(Node) "refresh(n)" is enough.
    2743     ///
    2744 #ifdef DOXYGEN
    2745     Arc operator()(Node s, Node t, Arc prev=INVALID) const {}
    2746 #else
    2747     using ArcLookUp<G>::operator() ;
    2748     Arc operator()(Node s, Node t, Arc prev) const
    2749     {
    2750       return prev==INVALID?(*this)(s,t):_next[prev];
    2751     }
    2752 #endif
    2753 
    2754   };
    2755 
    2756   /// @}
    2757 
    2758 } //END OF NAMESPACE LEMON
    2759 
    2760 #endif

  • lemon/kruskal.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/kruskal.h
    a b  
    2222#include <algorithm>
    2323#include <vector>
    2424#include <lemon/unionfind.h>
    25 // #include <lemon/graph_utils.h>
    2625#include <lemon/maps.h>
    2726
    28 // #include <lemon/radix_sort.h>
    29 
    30 #include <lemon/bits/utility.h>
     27#include <lemon/core.h>
    3128#include <lemon/bits/traits.h>
    3229
    3330///\ingroup spantree
    … …  
    300297  ///
    301298  /// \return The total cost of the found spanning tree.
    302299  ///
    303   /// \note If the input graph is not (weakly) connected, a spanning 
     300  /// \note If the input graph is not (weakly) connected, a spanning
    304301  /// forest is calculated instead of a spanning tree.
    305302
    306303#ifdef DOXYGEN

  • lemon/lgf_reader.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/lgf_reader.h
    a b  
    3232#include <map>
    3333
    3434#include <lemon/assert.h>
    35 #include <lemon/graph_utils.h>
     35#include <lemon/core.h>
    3636
    3737#include <lemon/lgf_writer.h>
    3838

  • lemon/lgf_writer.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/lgf_writer.h
    a b  
    3434#include <functional>
    3535
    3636#include <lemon/assert.h>
    37 #include <lemon/graph_utils.h>
     37#include <lemon/core.h>
     38#include <lemon/maps.h>
    3839
    3940namespace lemon {
    4041

  • lemon/list_graph.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/list_graph.h
    a b  
    2323///\file
    2424///\brief ListDigraph, ListGraph classes.
    2525
     26#include <lemon/core.h>
     27#include <lemon/error.h>
    2628#include <lemon/bits/graph_extender.h>
    2729
    2830#include <vector>

  • lemon/maps.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/maps.h
    a b  
    2323#include <functional>
    2424#include <vector>
    2525
    26 #include <lemon/bits/utility.h>
    27 #include <lemon/bits/traits.h>
     26#include <lemon/core.h>
    2827
    2928///\file
    3029///\ingroup maps
    … …  
    17801779    return LoggerBoolMap<Iterator>(it);
    17811780  }
    17821781
     1782  /// Provides an immutable and unique id for each item in the graph.
     1783
     1784  /// The IdMap class provides a unique and immutable id for each item of the
     1785  /// same type (e.g. node) in the graph. This id is <ul><li>\b unique:
     1786  /// different items (nodes) get different ids <li>\b immutable: the id of an
     1787  /// item (node) does not change (even if you delete other nodes).  </ul>
     1788  /// Through this map you get access (i.e. can read) the inner id values of
     1789  /// the items stored in the graph. This map can be inverted with its member
     1790  /// class \c InverseMap or with the \c operator() member.
     1791  ///
     1792  template <typename _Graph, typename _Item>
     1793  class IdMap {
     1794  public:
     1795    typedef _Graph Graph;
     1796    typedef int Value;
     1797    typedef _Item Item;
     1798    typedef _Item Key;
     1799
     1800    /// \brief Constructor.
     1801    ///
     1802    /// Constructor of the map.
     1803    explicit IdMap(const Graph& graph) : _graph(&graph) {}
     1804
     1805    /// \brief Gives back the \e id of the item.
     1806    ///
     1807    /// Gives back the immutable and unique \e id of the item.
     1808    int operator[](const Item& item) const { return _graph->id(item);}
     1809
     1810    /// \brief Gives back the item by its id.
     1811    ///
     1812    /// Gives back the item by its id.
     1813    Item operator()(int id) { return _graph->fromId(id, Item()); }
     1814
     1815  private:
     1816    const Graph* _graph;
     1817
     1818  public:
     1819
     1820    /// \brief The class represents the inverse of its owner (IdMap).
     1821    ///
     1822    /// The class represents the inverse of its owner (IdMap).
     1823    /// \see inverse()
     1824    class InverseMap {
     1825    public:
     1826
     1827      /// \brief Constructor.
     1828      ///
     1829      /// Constructor for creating an id-to-item map.
     1830      explicit InverseMap(const Graph& graph) : _graph(&graph) {}
     1831
     1832      /// \brief Constructor.
     1833      ///
     1834      /// Constructor for creating an id-to-item map.
     1835      explicit InverseMap(const IdMap& map) : _graph(map._graph) {}
     1836
     1837      /// \brief Gives back the given item from its id.
     1838      ///
     1839      /// Gives back the given item from its id.
     1840      ///
     1841      Item operator[](int id) const { return _graph->fromId(id, Item());}
     1842
     1843    private:
     1844      const Graph* _graph;
     1845    };
     1846
     1847    /// \brief Gives back the inverse of the map.
     1848    ///
     1849    /// Gives back the inverse of the IdMap.
     1850    InverseMap inverse() const { return InverseMap(*_graph);}
     1851
     1852  };
     1853
     1854
     1855  /// \brief General invertable graph-map type.
     1856
     1857  /// This type provides simple invertable graph-maps.
     1858  /// The InvertableMap wraps an arbitrary ReadWriteMap
     1859  /// and if a key is set to a new value then store it
     1860  /// in the inverse map.
     1861  ///
     1862  /// The values of the map can be accessed
     1863  /// with stl compatible forward iterator.
     1864  ///
     1865  /// \tparam _Graph The graph type.
     1866  /// \tparam _Item The item type of the graph.
     1867  /// \tparam _Value The value type of the map.
     1868  ///
     1869  /// \see IterableValueMap
     1870  template <typename _Graph, typename _Item, typename _Value>
     1871  class InvertableMap
     1872    : protected ItemSetTraits<_Graph, _Item>::template Map<_Value>::Type {
     1873  private:
     1874
     1875    typedef typename ItemSetTraits<_Graph, _Item>::
     1876    template Map<_Value>::Type Map;
     1877    typedef _Graph Graph;
     1878
     1879    typedef std::map<_Value, _Item> Container;
     1880    Container _inv_map;
     1881
     1882  public:
     1883
     1884    /// The key type of InvertableMap (Node, Arc, Edge).
     1885    typedef typename Map::Key Key;
     1886    /// The value type of the InvertableMap.
     1887    typedef typename Map::Value Value;
     1888
     1889
     1890
     1891    /// \brief Constructor.
     1892    ///
     1893    /// Construct a new InvertableMap for the graph.
     1894    ///
     1895    explicit InvertableMap(const Graph& graph) : Map(graph) {}
     1896
     1897    /// \brief Forward iterator for values.
     1898    ///
     1899    /// This iterator is an stl compatible forward
     1900    /// iterator on the values of the map. The values can
     1901    /// be accessed in the [beginValue, endValue) range.
     1902    ///
     1903    class ValueIterator
     1904      : public std::iterator<std::forward_iterator_tag, Value> {
     1905      friend class InvertableMap;
     1906    private:
     1907      ValueIterator(typename Container::const_iterator _it)
     1908        : it(_it) {}
     1909    public:
     1910
     1911      ValueIterator() {}
     1912
     1913      ValueIterator& operator++() { ++it; return *this; }
     1914      ValueIterator operator++(int) {
     1915        ValueIterator tmp(*this);
     1916        operator++();
     1917        return tmp;
     1918      }
     1919
     1920      const Value& operator*() const { return it->first; }
     1921      const Value* operator->() const { return &(it->first); }
     1922
     1923      bool operator==(ValueIterator jt) const { return it == jt.it; }
     1924      bool operator!=(ValueIterator jt) const { return it != jt.it; }
     1925
     1926    private:
     1927      typename Container::const_iterator it;
     1928    };
     1929
     1930    /// \brief Returns an iterator to the first value.
     1931    ///
     1932    /// Returns an stl compatible iterator to the
     1933    /// first value of the map. The values of the
     1934    /// map can be accessed in the [beginValue, endValue)
     1935    /// range.
     1936    ValueIterator beginValue() const {
     1937      return ValueIterator(_inv_map.begin());
     1938    }
     1939
     1940    /// \brief Returns an iterator after the last value.
     1941    ///
     1942    /// Returns an stl compatible iterator after the
     1943    /// last value of the map. The values of the
     1944    /// map can be accessed in the [beginValue, endValue)
     1945    /// range.
     1946    ValueIterator endValue() const {
     1947      return ValueIterator(_inv_map.end());
     1948    }
     1949
     1950    /// \brief The setter function of the map.
     1951    ///
     1952    /// Sets the mapped value.
     1953    void set(const Key& key, const Value& val) {
     1954      Value oldval = Map::operator[](key);
     1955      typename Container::iterator it = _inv_map.find(oldval);
     1956      if (it != _inv_map.end() && it->second == key) {
     1957        _inv_map.erase(it);
     1958      }
     1959      _inv_map.insert(make_pair(val, key));
     1960      Map::set(key, val);
     1961    }
     1962
     1963    /// \brief The getter function of the map.
     1964    ///
     1965    /// It gives back the value associated with the key.
     1966    typename MapTraits<Map>::ConstReturnValue
     1967    operator[](const Key& key) const {
     1968      return Map::operator[](key);
     1969    }
     1970
     1971    /// \brief Gives back the item by its value.
     1972    ///
     1973    /// Gives back the item by its value.
     1974    Key operator()(const Value& key) const {
     1975      typename Container::const_iterator it = _inv_map.find(key);
     1976      return it != _inv_map.end() ? it->second : INVALID;
     1977    }
     1978
     1979  protected:
     1980
     1981    /// \brief Erase the key from the map.
     1982    ///
     1983    /// Erase the key to the map. It is called by the
     1984    /// \c AlterationNotifier.
     1985    virtual void erase(const Key& key) {
     1986      Value val = Map::operator[](key);
     1987      typename Container::iterator it = _inv_map.find(val);
     1988      if (it != _inv_map.end() && it->second == key) {
     1989        _inv_map.erase(it);
     1990      }
     1991      Map::erase(key);
     1992    }
     1993
     1994    /// \brief Erase more keys from the map.
     1995    ///
     1996    /// Erase more keys from the map. It is called by the
     1997    /// \c AlterationNotifier.
     1998    virtual void erase(const std::vector<Key>& keys) {
     1999      for (int i = 0; i < int(keys.size()); ++i) {
     2000        Value val = Map::operator[](keys[i]);
     2001        typename Container::iterator it = _inv_map.find(val);
     2002        if (it != _inv_map.end() && it->second == keys[i]) {
     2003          _inv_map.erase(it);
     2004        }
     2005      }
     2006      Map::erase(keys);
     2007    }
     2008
     2009    /// \brief Clear the keys from the map and inverse map.
     2010    ///
     2011    /// Clear the keys from the map and inverse map. It is called by the
     2012    /// \c AlterationNotifier.
     2013    virtual void clear() {
     2014      _inv_map.clear();
     2015      Map::clear();
     2016    }
     2017
     2018  public:
     2019
     2020    /// \brief The inverse map type.
     2021    ///
     2022    /// The inverse of this map. The subscript operator of the map
     2023    /// gives back always the item what was last assigned to the value.
     2024    class InverseMap {
     2025    public:
     2026      /// \brief Constructor of the InverseMap.
     2027      ///
     2028      /// Constructor of the InverseMap.
     2029      explicit InverseMap(const InvertableMap& inverted)
     2030        : _inverted(inverted) {}
     2031
     2032      /// The value type of the InverseMap.
     2033      typedef typename InvertableMap::Key Value;
     2034      /// The key type of the InverseMap.
     2035      typedef typename InvertableMap::Value Key;
     2036
     2037      /// \brief Subscript operator.
     2038      ///
     2039      /// Subscript operator. It gives back always the item
     2040      /// what was last assigned to the value.
     2041      Value operator[](const Key& key) const {
     2042        return _inverted(key);
     2043      }
     2044
     2045    private:
     2046      const InvertableMap& _inverted;
     2047    };
     2048
     2049    /// \brief It gives back the just readable inverse map.
     2050    ///
     2051    /// It gives back the just readable inverse map.
     2052    InverseMap inverse() const {
     2053      return InverseMap(*this);
     2054    }
     2055
     2056
     2057
     2058  };
     2059
     2060  /// \brief Provides a mutable, continuous and unique descriptor for each
     2061  /// item in the graph.
     2062  ///
     2063  /// The DescriptorMap class provides a unique and continuous (but mutable)
     2064  /// descriptor (id) for each item of the same type (e.g. node) in the
     2065  /// graph. This id is <ul><li>\b unique: different items (nodes) get
     2066  /// different ids <li>\b continuous: the range of the ids is the set of
     2067  /// integers between 0 and \c n-1, where \c n is the number of the items of
     2068  /// this type (e.g. nodes) (so the id of a node can change if you delete an
     2069  /// other node, i.e. this id is mutable).  </ul> This map can be inverted
     2070  /// with its member class \c InverseMap, or with the \c operator() member.
     2071  ///
     2072  /// \tparam _Graph The graph class the \c DescriptorMap belongs to.
     2073  /// \tparam _Item The Item is the Key of the Map. It may be Node, Arc or
     2074  /// Edge.
     2075  template <typename _Graph, typename _Item>
     2076  class DescriptorMap
     2077    : protected ItemSetTraits<_Graph, _Item>::template Map<int>::Type {
     2078
     2079    typedef _Item Item;
     2080    typedef typename ItemSetTraits<_Graph, _Item>::template Map<int>::Type Map;
     2081
     2082  public:
     2083    /// The graph class of DescriptorMap.
     2084    typedef _Graph Graph;
     2085
     2086    /// The key type of DescriptorMap (Node, Arc, Edge).
     2087    typedef typename Map::Key Key;
     2088    /// The value type of DescriptorMap.
     2089    typedef typename Map::Value Value;
     2090
     2091    /// \brief Constructor.
     2092    ///
     2093    /// Constructor for descriptor map.
     2094    explicit DescriptorMap(const Graph& _graph) : Map(_graph) {
     2095      Item it;
     2096      const typename Map::Notifier* nf = Map::notifier();
     2097      for (nf->first(it); it != INVALID; nf->next(it)) {
     2098        Map::set(it, _inv_map.size());
     2099        _inv_map.push_back(it);
     2100      }
     2101    }
     2102
     2103  protected:
     2104
     2105    /// \brief Add a new key to the map.
     2106    ///
     2107    /// Add a new key to the map. It is called by the
     2108    /// \c AlterationNotifier.
     2109    virtual void add(const Item& item) {
     2110      Map::add(item);
     2111      Map::set(item, _inv_map.size());
     2112      _inv_map.push_back(item);
     2113    }
     2114
     2115    /// \brief Add more new keys to the map.
     2116    ///
     2117    /// Add more new keys to the map. It is called by the
     2118    /// \c AlterationNotifier.
     2119    virtual void add(const std::vector<Item>& items) {
     2120      Map::add(items);
     2121      for (int i = 0; i < int(items.size()); ++i) {
     2122        Map::set(items[i], _inv_map.size());
     2123        _inv_map.push_back(items[i]);
     2124      }
     2125    }
     2126
     2127    /// \brief Erase the key from the map.
     2128    ///
     2129    /// Erase the key from the map. It is called by the
     2130    /// \c AlterationNotifier.
     2131    virtual void erase(const Item& item) {
     2132      Map::set(_inv_map.back(), Map::operator[](item));
     2133      _inv_map[Map::operator[](item)] = _inv_map.back();
     2134      _inv_map.pop_back();
     2135      Map::erase(item);
     2136    }
     2137
     2138    /// \brief Erase more keys from the map.
     2139    ///
     2140    /// Erase more keys from the map. It is called by the
     2141    /// \c AlterationNotifier.
     2142    virtual void erase(const std::vector<Item>& items) {
     2143      for (int i = 0; i < int(items.size()); ++i) {
     2144        Map::set(_inv_map.back(), Map::operator[](items[i]));
     2145        _inv_map[Map::operator[](items[i])] = _inv_map.back();
     2146        _inv_map.pop_back();
     2147      }
     2148      Map::erase(items);
     2149    }
     2150
     2151    /// \brief Build the unique map.
     2152    ///
     2153    /// Build the unique map. It is called by the
     2154    /// \c AlterationNotifier.
     2155    virtual void build() {
     2156      Map::build();
     2157      Item it;
     2158      const typename Map::Notifier* nf = Map::notifier();
     2159      for (nf->first(it); it != INVALID; nf->next(it)) {
     2160        Map::set(it, _inv_map.size());
     2161        _inv_map.push_back(it);
     2162      }
     2163    }
     2164
     2165    /// \brief Clear the keys from the map.
     2166    ///
     2167    /// Clear the keys from the map. It is called by the
     2168    /// \c AlterationNotifier.
     2169    virtual void clear() {
     2170      _inv_map.clear();
     2171      Map::clear();
     2172    }
     2173
     2174  public:
     2175
     2176    /// \brief Returns the maximal value plus one.
     2177    ///
     2178    /// Returns the maximal value plus one in the map.
     2179    unsigned int size() const {
     2180      return _inv_map.size();
     2181    }
     2182
     2183    /// \brief Swaps the position of the two items in the map.
     2184    ///
     2185    /// Swaps the position of the two items in the map.
     2186    void swap(const Item& p, const Item& q) {
     2187      int pi = Map::operator[](p);
     2188      int qi = Map::operator[](q);
     2189      Map::set(p, qi);
     2190      _inv_map[qi] = p;
     2191      Map::set(q, pi);
     2192      _inv_map[pi] = q;
     2193    }
     2194
     2195    /// \brief Gives back the \e descriptor of the item.
     2196    ///
     2197    /// Gives back the mutable and unique \e descriptor of the map.
     2198    int operator[](const Item& item) const {
     2199      return Map::operator[](item);
     2200    }
     2201
     2202    /// \brief Gives back the item by its descriptor.
     2203    ///
     2204    /// Gives back th item by its descriptor.
     2205    Item operator()(int id) const {
     2206      return _inv_map[id];
     2207    }
     2208
     2209  private:
     2210
     2211    typedef std::vector<Item> Container;
     2212    Container _inv_map;
     2213
     2214  public:
     2215    /// \brief The inverse map type of DescriptorMap.
     2216    ///
     2217    /// The inverse map type of DescriptorMap.
     2218    class InverseMap {
     2219    public:
     2220      /// \brief Constructor of the InverseMap.
     2221      ///
     2222      /// Constructor of the InverseMap.
     2223      explicit InverseMap(const DescriptorMap& inverted)
     2224        : _inverted(inverted) {}
     2225
     2226
     2227      /// The value type of the InverseMap.
     2228      typedef typename DescriptorMap::Key Value;
     2229      /// The key type of the InverseMap.
     2230      typedef typename DescriptorMap::Value Key;
     2231
     2232      /// \brief Subscript operator.
     2233      ///
     2234      /// Subscript operator. It gives back the item
     2235      /// that the descriptor belongs to currently.
     2236      Value operator[](const Key& key) const {
     2237        return _inverted(key);
     2238      }
     2239
     2240      /// \brief Size of the map.
     2241      ///
     2242      /// Returns the size of the map.
     2243      unsigned int size() const {
     2244        return _inverted.size();
     2245      }
     2246
     2247    private:
     2248      const DescriptorMap& _inverted;
     2249    };
     2250
     2251    /// \brief Gives back the inverse of the map.
     2252    ///
     2253    /// Gives back the inverse of the map.
     2254    const InverseMap inverse() const {
     2255      return InverseMap(*this);
     2256    }
     2257  };
     2258
     2259  /// \brief Returns the source of the given arc.
     2260  ///
     2261  /// The SourceMap gives back the source Node of the given arc.
     2262  /// \see TargetMap
     2263  template <typename Digraph>
     2264  class SourceMap {
     2265  public:
     2266
     2267    typedef typename Digraph::Node Value;
     2268    typedef typename Digraph::Arc Key;
     2269
     2270    /// \brief Constructor
     2271    ///
     2272    /// Constructor
     2273    /// \param _digraph The digraph that the map belongs to.
     2274    explicit SourceMap(const Digraph& digraph) : _digraph(digraph) {}
     2275
     2276    /// \brief The subscript operator.
     2277    ///
     2278    /// The subscript operator.
     2279    /// \param arc The arc
     2280    /// \return The source of the arc
     2281    Value operator[](const Key& arc) const {
     2282      return _digraph.source(arc);
     2283    }
     2284
     2285  private:
     2286    const Digraph& _digraph;
     2287  };
     2288
     2289  /// \brief Returns a \ref SourceMap class.
     2290  ///
     2291  /// This function just returns an \ref SourceMap class.
     2292  /// \relates SourceMap
     2293  template <typename Digraph>
     2294  inline SourceMap<Digraph> sourceMap(const Digraph& digraph) {
     2295    return SourceMap<Digraph>(digraph);
     2296  }
     2297
     2298  /// \brief Returns the target of the given arc.
     2299  ///
     2300  /// The TargetMap gives back the target Node of the given arc.
     2301  /// \see SourceMap
     2302  template <typename Digraph>
     2303  class TargetMap {
     2304  public:
     2305
     2306    typedef typename Digraph::Node Value;
     2307    typedef typename Digraph::Arc Key;
     2308
     2309    /// \brief Constructor
     2310    ///
     2311    /// Constructor
     2312    /// \param _digraph The digraph that the map belongs to.
     2313    explicit TargetMap(const Digraph& digraph) : _digraph(digraph) {}
     2314
     2315    /// \brief The subscript operator.
     2316    ///
     2317    /// The subscript operator.
     2318    /// \param e The arc
     2319    /// \return The target of the arc
     2320    Value operator[](const Key& e) const {
     2321      return _digraph.target(e);
     2322    }
     2323
     2324  private:
     2325    const Digraph& _digraph;
     2326  };
     2327
     2328  /// \brief Returns a \ref TargetMap class.
     2329  ///
     2330  /// This function just returns a \ref TargetMap class.
     2331  /// \relates TargetMap
     2332  template <typename Digraph>
     2333  inline TargetMap<Digraph> targetMap(const Digraph& digraph) {
     2334    return TargetMap<Digraph>(digraph);
     2335  }
     2336
     2337  /// \brief Returns the "forward" directed arc view of an edge.
     2338  ///
     2339  /// Returns the "forward" directed arc view of an edge.
     2340  /// \see BackwardMap
     2341  template <typename Graph>
     2342  class ForwardMap {
     2343  public:
     2344
     2345    typedef typename Graph::Arc Value;
     2346    typedef typename Graph::Edge Key;
     2347
     2348    /// \brief Constructor
     2349    ///
     2350    /// Constructor
     2351    /// \param _graph The graph that the map belongs to.
     2352    explicit ForwardMap(const Graph& graph) : _graph(graph) {}
     2353
     2354    /// \brief The subscript operator.
     2355    ///
     2356    /// The subscript operator.
     2357    /// \param key An edge
     2358    /// \return The "forward" directed arc view of edge
     2359    Value operator[](const Key& key) const {
     2360      return _graph.direct(key, true);
     2361    }
     2362
     2363  private:
     2364    const Graph& _graph;
     2365  };
     2366
     2367  /// \brief Returns a \ref ForwardMap class.
     2368  ///
     2369  /// This function just returns an \ref ForwardMap class.
     2370  /// \relates ForwardMap
     2371  template <typename Graph>
     2372  inline ForwardMap<Graph> forwardMap(const Graph& graph) {
     2373    return ForwardMap<Graph>(graph);
     2374  }
     2375
     2376  /// \brief Returns the "backward" directed arc view of an edge.
     2377  ///
     2378  /// Returns the "backward" directed arc view of an edge.
     2379  /// \see ForwardMap
     2380  template <typename Graph>
     2381  class BackwardMap {
     2382  public:
     2383
     2384    typedef typename Graph::Arc Value;
     2385    typedef typename Graph::Edge Key;
     2386
     2387    /// \brief Constructor
     2388    ///
     2389    /// Constructor
     2390    /// \param _graph The graph that the map belongs to.
     2391    explicit BackwardMap(const Graph& graph) : _graph(graph) {}
     2392
     2393    /// \brief The subscript operator.
     2394    ///
     2395    /// The subscript operator.
     2396    /// \param key An edge
     2397    /// \return The "backward" directed arc view of edge
     2398    Value operator[](const Key& key) const {
     2399      return _graph.direct(key, false);
     2400    }
     2401
     2402  private:
     2403    const Graph& _graph;
     2404  };
     2405
     2406  /// \brief Returns a \ref BackwardMap class
     2407
     2408  /// This function just returns a \ref BackwardMap class.
     2409  /// \relates BackwardMap
     2410  template <typename Graph>
     2411  inline BackwardMap<Graph> backwardMap(const Graph& graph) {
     2412    return BackwardMap<Graph>(graph);
     2413  }
     2414
     2415  /// \brief Potential difference map
     2416  ///
     2417  /// If there is an potential map on the nodes then we
     2418  /// can get an arc map as we get the substraction of the
     2419  /// values of the target and source.
     2420  template <typename Digraph, typename NodeMap>
     2421  class PotentialDifferenceMap {
     2422  public:
     2423    typedef typename Digraph::Arc Key;
     2424    typedef typename NodeMap::Value Value;
     2425
     2426    /// \brief Constructor
     2427    ///
     2428    /// Contructor of the map
     2429    explicit PotentialDifferenceMap(const Digraph& digraph,
     2430                                    const NodeMap& potential)
     2431      : _digraph(digraph), _potential(potential) {}
     2432
     2433    /// \brief Const subscription operator
     2434    ///
     2435    /// Const subscription operator
     2436    Value operator[](const Key& arc) const {
     2437      return _potential[_digraph.target(arc)] -
     2438        _potential[_digraph.source(arc)];
     2439    }
     2440
     2441  private:
     2442    const Digraph& _digraph;
     2443    const NodeMap& _potential;
     2444  };
     2445
     2446  /// \brief Returns a PotentialDifferenceMap.
     2447  ///
     2448  /// This function just returns a PotentialDifferenceMap.
     2449  /// \relates PotentialDifferenceMap
     2450  template <typename Digraph, typename NodeMap>
     2451  PotentialDifferenceMap<Digraph, NodeMap>
     2452  potentialDifferenceMap(const Digraph& digraph, const NodeMap& potential) {
     2453    return PotentialDifferenceMap<Digraph, NodeMap>(digraph, potential);
     2454  }
     2455
     2456  /// \brief Map of the node in-degrees.
     2457  ///
     2458  /// This map returns the in-degree of a node. Once it is constructed,
     2459  /// the degrees are stored in a standard NodeMap, so each query is done
     2460  /// in constant time. On the other hand, the values are updated automatically
     2461  /// whenever the digraph changes.
     2462  ///
     2463  /// \warning Besides addNode() and addArc(), a digraph structure may provide
     2464  /// alternative ways to modify the digraph. The correct behavior of InDegMap
     2465  /// is not guarantied if these additional features are used. For example
     2466  /// the functions \ref ListDigraph::changeSource() "changeSource()",
     2467  /// \ref ListDigraph::changeTarget() "changeTarget()" and
     2468  /// \ref ListDigraph::reverseArc() "reverseArc()"
     2469  /// of \ref ListDigraph will \e not update the degree values correctly.
     2470  ///
     2471  /// \sa OutDegMap
     2472
     2473  template <typename _Digraph>
     2474  class InDegMap
     2475    : protected ItemSetTraits<_Digraph, typename _Digraph::Arc>
     2476      ::ItemNotifier::ObserverBase {
     2477
     2478  public:
     2479
     2480    typedef _Digraph Digraph;
     2481    typedef int Value;
     2482    typedef typename Digraph::Node Key;
     2483
     2484    typedef typename ItemSetTraits<Digraph, typename Digraph::Arc>
     2485    ::ItemNotifier::ObserverBase Parent;
     2486
     2487  private:
     2488
     2489    class AutoNodeMap
     2490      : public ItemSetTraits<Digraph, Key>::template Map<int>::Type {
     2491    public:
     2492
     2493      typedef typename ItemSetTraits<Digraph, Key>::
     2494      template Map<int>::Type Parent;
     2495
     2496      AutoNodeMap(const Digraph& digraph) : Parent(digraph, 0) {}
     2497
     2498      virtual void add(const Key& key) {
     2499        Parent::add(key);
     2500        Parent::set(key, 0);
     2501      }
     2502
     2503      virtual void add(const std::vector<Key>& keys) {
     2504        Parent::add(keys);
     2505        for (int i = 0; i < int(keys.size()); ++i) {
     2506          Parent::set(keys[i], 0);
     2507        }
     2508      }
     2509
     2510      virtual void build() {
     2511        Parent::build();
     2512        Key it;
     2513        typename Parent::Notifier* nf = Parent::notifier();
     2514        for (nf->first(it); it != INVALID; nf->next(it)) {
     2515          Parent::set(it, 0);
     2516        }
     2517      }
     2518    };
     2519
     2520  public:
     2521
     2522    /// \brief Constructor.
     2523    ///
     2524    /// Constructor for creating in-degree map.
     2525    explicit InDegMap(const Digraph& digraph)
     2526      : _digraph(digraph), _deg(digraph) {
     2527      Parent::attach(_digraph.notifier(typename Digraph::Arc()));
     2528
     2529      for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
     2530        _deg[it] = countInArcs(_digraph, it);
     2531      }
     2532    }
     2533
     2534    /// Gives back the in-degree of a Node.
     2535    int operator[](const Key& key) const {
     2536      return _deg[key];
     2537    }
     2538
     2539  protected:
     2540
     2541    typedef typename Digraph::Arc Arc;
     2542
     2543    virtual void add(const Arc& arc) {
     2544      ++_deg[_digraph.target(arc)];
     2545    }
     2546
     2547    virtual void add(const std::vector<Arc>& arcs) {
     2548      for (int i = 0; i < int(arcs.size()); ++i) {
     2549        ++_deg[_digraph.target(arcs[i])];
     2550      }
     2551    }
     2552
     2553    virtual void erase(const Arc& arc) {
     2554      --_deg[_digraph.target(arc)];
     2555    }
     2556
     2557    virtual void erase(const std::vector<Arc>& arcs) {
     2558      for (int i = 0; i < int(arcs.size()); ++i) {
     2559        --_deg[_digraph.target(arcs[i])];
     2560      }
     2561    }
     2562
     2563    virtual void build() {
     2564      for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
     2565        _deg[it] = countInArcs(_digraph, it);
     2566      }
     2567    }
     2568
     2569    virtual void clear() {
     2570      for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
     2571        _deg[it] = 0;
     2572      }
     2573    }
     2574  private:
     2575
     2576    const Digraph& _digraph;
     2577    AutoNodeMap _deg;
     2578  };
     2579
     2580  /// \brief Map of the node out-degrees.
     2581  ///
     2582  /// This map returns the out-degree of a node. Once it is constructed,
     2583  /// the degrees are stored in a standard NodeMap, so each query is done
     2584  /// in constant time. On the other hand, the values are updated automatically
     2585  /// whenever the digraph changes.
     2586  ///
     2587  /// \warning Besides addNode() and addArc(), a digraph structure may provide
     2588  /// alternative ways to modify the digraph. The correct behavior of OutDegMap
     2589  /// is not guarantied if these additional features are used. For example
     2590  /// the functions \ref ListDigraph::changeSource() "changeSource()",
     2591  /// \ref ListDigraph::changeTarget() "changeTarget()" and
     2592  /// \ref ListDigraph::reverseArc() "reverseArc()"
     2593  /// of \ref ListDigraph will \e not update the degree values correctly.
     2594  ///
     2595  /// \sa InDegMap
     2596
     2597  template <typename _Digraph>
     2598  class OutDegMap
     2599    : protected ItemSetTraits<_Digraph, typename _Digraph::Arc>
     2600      ::ItemNotifier::ObserverBase {
     2601
     2602  public:
     2603
     2604    typedef _Digraph Digraph;
     2605    typedef int Value;
     2606    typedef typename Digraph::Node Key;
     2607
     2608    typedef typename ItemSetTraits<Digraph, typename Digraph::Arc>
     2609    ::ItemNotifier::ObserverBase Parent;
     2610
     2611  private:
     2612
     2613    class AutoNodeMap
     2614      : public ItemSetTraits<Digraph, Key>::template Map<int>::Type {
     2615    public:
     2616
     2617      typedef typename ItemSetTraits<Digraph, Key>::
     2618      template Map<int>::Type Parent;
     2619
     2620      AutoNodeMap(const Digraph& digraph) : Parent(digraph, 0) {}
     2621
     2622      virtual void add(const Key& key) {
     2623        Parent::add(key);
     2624        Parent::set(key, 0);
     2625      }
     2626      virtual void add(const std::vector<Key>& keys) {
     2627        Parent::add(keys);
     2628        for (int i = 0; i < int(keys.size()); ++i) {
     2629          Parent::set(keys[i], 0);
     2630        }
     2631      }
     2632      virtual void build() {
     2633        Parent::build();
     2634        Key it;
     2635        typename Parent::Notifier* nf = Parent::notifier();
     2636        for (nf->first(it); it != INVALID; nf->next(it)) {
     2637          Parent::set(it, 0);
     2638        }
     2639      }
     2640    };
     2641
     2642  public:
     2643
     2644    /// \brief Constructor.
     2645    ///
     2646    /// Constructor for creating out-degree map.
     2647    explicit OutDegMap(const Digraph& digraph)
     2648      : _digraph(digraph), _deg(digraph) {
     2649      Parent::attach(_digraph.notifier(typename Digraph::Arc()));
     2650
     2651      for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
     2652        _deg[it] = countOutArcs(_digraph, it);
     2653      }
     2654    }
     2655
     2656    /// Gives back the out-degree of a Node.
     2657    int operator[](const Key& key) const {
     2658      return _deg[key];
     2659    }
     2660
     2661  protected:
     2662
     2663    typedef typename Digraph::Arc Arc;
     2664
     2665    virtual void add(const Arc& arc) {
     2666      ++_deg[_digraph.source(arc)];
     2667    }
     2668
     2669    virtual void add(const std::vector<Arc>& arcs) {
     2670      for (int i = 0; i < int(arcs.size()); ++i) {
     2671        ++_deg[_digraph.source(arcs[i])];
     2672      }
     2673    }
     2674
     2675    virtual void erase(const Arc& arc) {
     2676      --_deg[_digraph.source(arc)];
     2677    }
     2678
     2679    virtual void erase(const std::vector<Arc>& arcs) {
     2680      for (int i = 0; i < int(arcs.size()); ++i) {
     2681        --_deg[_digraph.source(arcs[i])];
     2682      }
     2683    }
     2684
     2685    virtual void build() {
     2686      for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
     2687        _deg[it] = countOutArcs(_digraph, it);
     2688      }
     2689    }
     2690
     2691    virtual void clear() {
     2692      for(typename Digraph::NodeIt it(_digraph); it != INVALID; ++it) {
     2693        _deg[it] = 0;
     2694      }
     2695    }
     2696  private:
     2697
     2698    const Digraph& _digraph;
     2699    AutoNodeMap _deg;
     2700  };
     2701
    17832702  /// @}
    17842703}
    17852704

  • lemon/path.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/path.h
    a b  
    2828#include <algorithm>
    2929
    3030#include <lemon/error.h>
    31 #include <lemon/bits/invalid.h>
     31#include <lemon/core.h>
    3232#include <lemon/concepts/path.h>
    3333
    3434namespace lemon {

  • lemon/smart_graph.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/smart_graph.h
    a b  
    2525
    2626#include <vector>
    2727
    28 #include <lemon/bits/invalid.h>
    29 
    30 #include <lemon/bits/base_extender.h>
    31 #include <lemon/bits/graph_extender.h>
    32 
    33 #include <lemon/bits/utility.h>
     28#include <lemon/core.h>
    3429#include <lemon/error.h>
    35 
    3630#include <lemon/bits/graph_extender.h>
    3731
    3832namespace lemon {

  • lemon/unionfind.h 

    diff -r b67149f0e675 -r 5b8f6f06687e lemon/unionfind.h
    a b  
    3030#include <algorithm>
    3131#include <functional>
    3232
    33 #include <lemon/bits/invalid.h>
     33#include <lemon/core.h>
    3434
    3535namespace lemon {
    3636

  • test/dijkstra_test.cc 

    diff -r b67149f0e675 -r 5b8f6f06687e test/dijkstra_test.cc
    a b  
    1919#include <lemon/concepts/digraph.h>
    2020#include <lemon/smart_graph.h>
    2121#include <lemon/list_graph.h>
    22 #include <lemon/graph_utils.h>
    2322#include <lemon/dijkstra.h>
    2423#include <lemon/path.h>
    2524

  • test/graph_copy_test.cc 

    diff -r b67149f0e675 -r 5b8f6f06687e test/graph_copy_test.cc
    a b  
    1919#include <lemon/smart_graph.h>
    2020#include <lemon/list_graph.h>
    2121#include <lemon/lgf_reader.h>
    22 #include <lemon/graph_utils.h>
    2322#include <lemon/error.h>
    2423
    2524#include "test_tools.h"

  • test/graph_test.h 

    diff -r b67149f0e675 -r 5b8f6f06687e test/graph_test.h
    a b  
    1919#ifndef LEMON_TEST_GRAPH_TEST_H
    2020#define LEMON_TEST_GRAPH_TEST_H
    2121
    22 #include <lemon/graph_utils.h>
     22#include <lemon/core.h>
    2323#include "test_tools.h"
    2424
    2525namespace lemon {

  • test/graph_utils_test.cc 

    diff -r b67149f0e675 -r 5b8f6f06687e test/graph_utils_test.cc
    a b  
    2020#include <ctime>
    2121
    2222#include <lemon/random.h>
    23 #include <lemon/graph_utils.h>
    2423#include <lemon/list_graph.h>
    2524#include <lemon/smart_graph.h>
     25#include <lemon/maps.h>
    2626
    2727#include "graph_test.h"
    2828#include "test_tools.h"