RhodeCode

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#include <lemon/core.h>

#include <lemon/concept_check.h>

namespace lemon {

  template <typename _Digraph, typename _PredMap>

  class PredMapPath {

  public:

    typedef True RevPathTag;

    typedef _Digraph Digraph;

    typedef typename Digraph::Arc Arc;

    typedef _PredMap PredMap;

    PredMapPath(const Digraph& _digraph, const PredMap& _predMap,

                typename Digraph::Node _target)

      : digraph(_digraph), predMap(_predMap), target(_target) {}

    int length() const {

      int len = 0;

      typename Digraph::Node node = target;

      typename Digraph::Arc arc;

      while ((arc = predMap[node]) != INVALID) {

        node = digraph.source(arc);

        ++len;

      }

      return len;

    }

    bool empty() const {

      return predMap[target] != INVALID;

    }

    class RevArcIt {

    public:

      RevArcIt() {}

      RevArcIt(Invalid) : path(0), current(INVALID) {}

      RevArcIt(const PredMapPath& _path)

        : path(&_path), current(_path.target) {

        if (path->predMap[current] == INVALID) current = INVALID;

      }

      operator const typename Digraph::Arc() const {

        return path->predMap[current];

      }

      RevArcIt& operator++() {

        current = path->digraph.source(path->predMap[current]);

        if (path->predMap[current] == INVALID) current = INVALID;

        return *this;

      }

      bool operator==(const RevArcIt& e) const {

        return current == e.current;

      }

      bool operator!=(const RevArcIt& e) const {

        return current != e.current;

      }

      bool operator<(const RevArcIt& e) const {

        return current < e.current;

      }

    private:

      const PredMapPath* path;

      typename Digraph::Node current;

    };

  private:

    const Digraph& digraph;

    const PredMap& predMap;

    typename Digraph::Node target;

  };

  template <typename _Digraph, typename _PredMatrixMap>

  class PredMatrixMapPath {

  public:

    typedef True RevPathTag;

    typedef _Digraph Digraph;

    typedef typename Digraph::Arc Arc;

    typedef _PredMatrixMap PredMatrixMap;

    PredMatrixMapPath(const Digraph& _digraph,

                      const PredMatrixMap& _predMatrixMap,

                      typename Digraph::Node _source,

                      typename Digraph::Node _target)

      : digraph(_digraph), predMatrixMap(_predMatrixMap),

        source(_source), target(_target) {}

    int length() const {

      int len = 0;

      typename Digraph::Node node = target;

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#include <string>

namespace lemon {

  namespace bits {

    void getWinProcTimes(double &rtime,

                         double &utime, double &stime,

                         double &cutime, double &cstime);

    std::string getWinFormattedDate();

    int getWinRndSeed();

  }

}

#endif

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

///\ingroup graph_concepts

///\file

///\brief The concept of directed graphs.

#include <lemon/core.h>

#include <lemon/concepts/maps.h>

#include <lemon/concept_check.h>

#include <lemon/concepts/graph_components.h>

namespace lemon {

  namespace concepts {

    /// \ingroup graph_concepts

    ///

    /// \brief Class describing the concept of directed graphs.

    ///

    /// This class describes the \ref concept "concept" of the

    /// immutable directed digraphs.

    ///

    /// Note that actual digraph implementation like @ref ListDigraph or

    /// @ref SmartDigraph may have several additional functionality.

    ///

    /// \sa concept

    class Digraph {

    private:

      ///Digraphs are \e not copy constructible. Use DigraphCopy() instead.

      ///Digraphs are \e not copy constructible. Use DigraphCopy() instead.

      ///

      Digraph(const Digraph &) {};

      ///\brief Assignment of \ref Digraph "Digraph"s to another ones are

      ///\e not allowed. Use DigraphCopy() instead.

      ///Assignment of \ref Digraph "Digraph"s to another ones are

      ///\e not allowed.  Use DigraphCopy() instead.

      void operator=(const Digraph &) {}

    public:

      ///\e

      /// Defalult constructor.

      /// Defalult constructor.

      ///

      Digraph() { }

      /// Class for identifying a node of the digraph

      /// This class identifies a node of the digraph. It also serves

      /// as a base class of the node iterators,

      /// thus they will convert to this type.

      class Node {

      public:

        /// Default constructor

        /// @warning The default constructor sets the iterator

        /// to an undefined value.

        Node() { }

        /// Copy constructor.

        /// Copy constructor.

        ///

        Node(const Node&) { }

        /// Invalid constructor \& conversion.

        /// This constructor initializes the iterator to be invalid.

        /// \sa Invalid for more details.

        Node(Invalid) { }

        /// Equality operator

        /// Two iterators are equal if and only if they point to the

        /// same object or both are invalid.

        bool operator==(Node) const { return true; }

        /// Inequality operator

        /// \sa operator==(Node n)

        ///

        bool operator!=(Node) const { return true; }

        /// Artificial ordering operator.

        /// To allow the use of digraph descriptors as key type in std::map or

        /// similar associative container we require this.

        ///

        /// \note This operator only have to define some strict ordering of

        /// the items; this order has nothing to do with the iteration

        /// ordering of the items.

        bool operator<(Node) const { return false; }

      };

      /// This iterator goes through each node.

      /// This iterator goes through each node.

      int maxId(Node) const { return -1; }

      // Dummy parameter.

      int maxId(Arc) const { return -1; }

      /// \brief The base node of the iterator.

      ///

      /// Gives back the base node of the iterator.

      /// It is always the target of the pointed arc.

      Node baseNode(const InArcIt&) const { return INVALID; }

      /// \brief The running node of the iterator.

      ///

      /// Gives back the running node of the iterator.

      /// It is always the source of the pointed arc.

      Node runningNode(const InArcIt&) const { return INVALID; }

      /// \brief The base node of the iterator.

      ///

      /// Gives back the base node of the iterator.

      /// It is always the source of the pointed arc.

      Node baseNode(const OutArcIt&) const { return INVALID; }

      /// \brief The running node of the iterator.

      ///

      /// Gives back the running node of the iterator.

      /// It is always the target of the pointed arc.

      Node runningNode(const OutArcIt&) const { return INVALID; }

      /// \brief The opposite node on the given arc.

      ///

      /// Gives back the opposite node on the given arc.

      Node oppositeNode(const Node&, const Arc&) const { return INVALID; }

      /// \brief Read write map of the nodes to type \c T.

      ///

      /// ReadWrite map of the nodes to type \c T.

      /// \sa Reference

      template<class T>

      class NodeMap : public ReadWriteMap< Node, T > {

      public:

        ///\e

        NodeMap(const Digraph&) { }

        ///\e

        NodeMap(const Digraph&, T) { }

      private:

        ///Copy constructor

        NodeMap(const NodeMap& nm) : ReadWriteMap< Node, T >(nm) { }

        ///Assignment operator

        template <typename CMap>

        NodeMap& operator=(const CMap&) {

          checkConcept<ReadMap<Node, T>, CMap>();

          return *this;

        }

      };

      /// \brief Read write map of the arcs to type \c T.

      ///

      /// Reference map of the arcs to type \c T.

      /// \sa Reference

      template<class T>

      class ArcMap : public ReadWriteMap<Arc,T> {

      public:

        ///\e

        ArcMap(const Digraph&) { }

        ///\e

        ArcMap(const Digraph&, T) { }

      private:

        ///Copy constructor

        ArcMap(const ArcMap& em) : ReadWriteMap<Arc,T>(em) { }

        ///Assignment operator

        template <typename CMap>

        ArcMap& operator=(const CMap&) {

          checkConcept<ReadMap<Arc, T>, CMap>();

          return *this;

        }

      };

      template <typename _Digraph>

      struct Constraints {

        void constraints() {

          checkConcept<IterableDigraphComponent<>, _Digraph>();

          checkConcept<IDableDigraphComponent<>, _Digraph>();

          checkConcept<MappableDigraphComponent<>, _Digraph>();

        }

      };

    };

  } //namespace concepts

} //namespace lemon

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

///\ingroup graph_concepts

///\file

///\brief The concept of Undirected Graphs.

#include <lemon/concepts/graph_components.h>

#include <lemon/core.h>

namespace lemon {

  namespace concepts {

    /// \ingroup graph_concepts

    ///

    /// \brief Class describing the concept of Undirected Graphs.

    ///

    /// This class describes the common interface of all Undirected

    /// Graphs.

    ///

    /// As all concept describing classes it provides only interface

    /// without any sensible implementation. So any algorithm for

    /// undirected graph should compile with this class, but it will not

    /// run properly, of course.

    ///

    /// The LEMON undirected graphs also fulfill the concept of

    /// directed graphs (\ref lemon::concepts::Digraph "Digraph

    /// Concept"). Each edges can be seen as two opposite

    /// directed arc and consequently the undirected graph can be

    /// seen as the direceted graph of these directed arcs. The

    /// Graph has the Edge inner class for the edges and

    /// the Arc type for the directed arcs. The Arc type is

    /// convertible to Edge or inherited from it so from a directed

    /// arc we can get the represented edge.

    ///

    /// In the sense of the LEMON each edge has a default

    /// direction (it should be in every computer implementation,

    /// because the order of edge's nodes defines an

    /// orientation). With the default orientation we can define that

    /// the directed arc is forward or backward directed. With the \c

    /// direction() and \c direct() function we can get the direction

    /// of the directed arc and we can direct an edge.

    ///

    /// The EdgeIt is an iterator for the edges. We can use

    /// the EdgeMap to map values for the edges. The InArcIt and

    /// OutArcIt iterates on the same edges but with opposite

    /// direction. The IncEdgeIt iterates also on the same edges

    /// as the OutArcIt and InArcIt but it is not convertible to Arc just

    /// to Edge.

    class Graph {

    public:

      /// \brief The undirected graph should be tagged by the

      /// UndirectedTag.

      ///

      /// The undirected graph should be tagged by the UndirectedTag. This

      /// tag helps the enable_if technics to make compile time

      /// specializations for undirected graphs.

      typedef True UndirectedTag;

      /// \brief The base type of node iterators,

      /// or in other words, the trivial node iterator.

      ///

      /// This is the base type of each node iterator,

      /// thus each kind of node iterator converts to this.

      /// More precisely each kind of node iterator should be inherited

      /// from the trivial node iterator.

      class Node {

      public:

        /// Default constructor

        /// @warning The default constructor sets the iterator

        /// to an undefined value.

        Node() { }

        /// Copy constructor.

        /// Copy constructor.

        ///

        Node(const Node&) { }

        /// Invalid constructor \& conversion.

        /// This constructor initializes the iterator to be invalid.

        /// \sa Invalid for more details.

        Node(Invalid) { }

        /// Equality operator

        /// Two iterators are equal if and only if they point to the

        /// same object or both are invalid.

        bool operator==(Node) const { return true; }

        /// Inequality operator

        /// \sa operator==(Node n)

        ///

        bool operator!=(Node) const { return true; }

        /// Artificial ordering operator.

        /// To allow the use of graph descriptors as key type in std::map or

        /// similar associative container we require this.

        ///

        /// \note This operator only have to define some strict ordering of

        /// the items; this order has nothing to do with the iteration

        /// ordering of the items.

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

///\ingroup graph_concepts

///\file

///\brief The concept of graph components.

#include <lemon/core.h>

#include <lemon/concepts/maps.h>

#include <lemon/bits/alteration_notifier.h>

namespace lemon {

  namespace concepts {

    /// \brief Skeleton class for graph Node and Arc types

    ///

    /// This class describes the interface of Node and Arc (and Edge

    /// in undirected graphs) subtypes of graph types.

    ///

    /// \note This class is a template class so that we can use it to

    /// create graph skeleton classes. The reason for this is than Node

    /// and Arc types should \em not derive from the same base class.

    /// For Node you should instantiate it with character 'n' and for Arc

    /// with 'a'.

#ifndef DOXYGEN

    template <char _selector = '0'>

#endif

    class GraphItem {

    public:

      /// \brief Default constructor.

      ///

      /// \warning The default constructor is not required to set

      /// the item to some well-defined value. So you should consider it

      /// as uninitialized.

      GraphItem() {}

      /// \brief Copy constructor.

      ///

      /// Copy constructor.

      ///

      GraphItem(const GraphItem &) {}

      /// \brief Invalid constructor \& conversion.

      ///

      /// This constructor initializes the item to be invalid.

      /// \sa Invalid for more details.

      GraphItem(Invalid) {}

      /// \brief Assign operator for nodes.

      ///

      /// The nodes are assignable.

      ///

      GraphItem& operator=(GraphItem const&) { return *this; }

      /// \brief Equality operator.

      ///

      /// Two iterators are equal if and only if they represents the

      /// same node in the graph or both are invalid.

      bool operator==(GraphItem) const { return false; }

      /// \brief Inequality operator.

      ///

      /// \sa operator==(const Node& n)

      ///

      bool operator!=(GraphItem) const { return false; }

      /// \brief Artificial ordering operator.

      ///

      /// To allow the use of graph descriptors as key type in std::map or

      /// similar associative container we require this.

      ///

      /// \note This operator only have to define some strict ordering of

      /// the items; this order has nothing to do with the iteration

      /// ordering of the items.

      bool operator<(GraphItem) const { return false; }

      template<typename _GraphItem>

      struct Constraints {

        void constraints() {

          _GraphItem i1;

          _GraphItem i2 = i1;

          _GraphItem i3 = INVALID;

          i1 = i2 = i3;

          bool b;

          //          b = (ia == ib) && (ia != ib) && (ia < ib);

          b = (ia == ib) && (ia != ib);

          b = (ia == INVALID) && (ib != INVALID);

          b = (ia < ib);

        }

        const _GraphItem &ia;

        const _GraphItem &ib;

      };

    };

    /// \brief An empty base directed graph class.

    ///

    /// This class provides the minimal set of features needed for a

    /// directed graph structure. All digraph concepts have to be

    /// conform to this base directed graph. It just provides types

    /// for nodes and arcs and functions to get the source and the

    /// target of the arcs.

    class BaseDigraphComponent {

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

///\ingroup concept

///\file

///\brief The concept of heaps.

#include <lemon/core.h>

#include <lemon/concept_check.h>

namespace lemon {

  namespace concepts {

    /// \addtogroup concept

    /// @{

    /// \brief The heap concept.

    ///

    /// Concept class describing the main interface of heaps.

    template <typename Priority, typename ItemIntMap>

    class Heap {

    public:

      /// Type of the items stored in the heap.

      typedef typename ItemIntMap::Key Item;

      /// Type of the priorities.

      typedef Priority Prio;

      /// \brief Type to represent the states of the items.

      ///

      /// Each item has a state associated to it. It can be "in heap",

      /// "pre heap" or "post heap". The later two are indifferent

      /// from the point of view of the heap, but may be useful for

      /// the user.

      ///

      /// The \c ItemIntMap must be initialized in such a way, that it

      /// assigns \c PRE_HEAP (<tt>-1</tt>) to every item.

      enum State {

        IN_HEAP = 0,

        PRE_HEAP = -1,

        POST_HEAP = -2

      };

      /// \brief The constructor.

      ///

      /// The constructor.

      /// \param map A map that assigns \c int values to keys of type

      /// \c Item. It is used internally by the heap implementations to

      /// handle the cross references. The assigned value must be

      /// \c PRE_HEAP (<tt>-1</tt>) for every item.

      explicit Heap(ItemIntMap &map) {}

      /// \brief The number of items stored in the heap.

      ///

      /// Returns the number of items stored in the heap.

      int size() const { return 0; }

      /// \brief Checks if the heap is empty.

      ///

      /// Returns \c true if the heap is empty.

      bool empty() const { return false; }

      /// \brief Makes the heap empty.

      ///

      /// Makes the heap empty.

      void clear();

      /// \brief Inserts an item into the heap with the given priority.

      ///

      /// Inserts the given item into the heap with the given priority.

      /// \param i The item to insert.

      /// \param p The priority of the item.

      void push(const Item &i, const Prio &p) {}

      /// \brief Returns the item having minimum priority.

      ///

      /// Returns the item having minimum priority.

      /// \pre The heap must be non-empty.

      Item top() const {}

      /// \brief The minimum priority.

      ///

      /// Returns the minimum priority.

      /// \pre The heap must be non-empty.

      Prio prio() const {}

      /// \brief Removes the item having minimum priority.

      ///

      /// Removes the item having minimum priority.

      /// \pre The heap must be non-empty.

      void pop() {}

      /// \brief Removes an item from the heap.

      ///

      /// Removes the given item from the heap if it is already stored.

      /// \param i The item to delete.

      void erase(const Item &i) {}

      /// \brief The priority of an item.

      ///

      /// \param p The priority.

      void increase(const Item &i, const Prio &p) {}

      /// \brief Returns if an item is in, has already been in, or has

      /// never been in the heap.

      ///

      /// This method returns \c PRE_HEAP if the given item has never

      /// been in the heap, \c IN_HEAP if it is in the heap at the moment,

      /// and \c POST_HEAP otherwise.

      /// In the latter case it is possible that the item will get back

      /// to the heap again.

      /// \param i The item.

      State state(const Item &i) const {}

      /// \brief Sets the state of an item in the heap.

      ///

      /// Sets the state of the given item in the heap. It can be used

      /// to manually clear the heap when it is important to achive the

      /// better time complexity.

      /// \param i The item.

      /// \param st The state. It should not be \c IN_HEAP.

      void state(const Item& i, State st) {}

      template <typename _Heap>

      struct Constraints {

      public:

        void constraints() {

          typedef typename _Heap::Item OwnItem;

          typedef typename _Heap::Prio OwnPrio;

          typedef typename _Heap::State OwnState;

          Item item;

          Prio prio;

          item=Item();

          prio=Prio();

          ignore_unused_variable_warning(item);

          ignore_unused_variable_warning(prio);

          OwnItem own_item;

          OwnPrio own_prio;

          OwnState own_state;

          own_item=Item();

          own_prio=Prio();

          ignore_unused_variable_warning(own_item);

          ignore_unused_variable_warning(own_prio);

          ignore_unused_variable_warning(own_state);

          _Heap heap1(map);

          _Heap heap2 = heap1;

          ignore_unused_variable_warning(heap1);

          ignore_unused_variable_warning(heap2);

          int s = heap.size();

          ignore_unused_variable_warning(s);

          bool e = heap.empty();

          ignore_unused_variable_warning(e);

          prio = heap.prio();

          item = heap.top();

          prio = heap[item];

          own_prio = heap.prio();

          own_item = heap.top();

          own_prio = heap[own_item];

          heap.push(item, prio);

          heap.push(own_item, own_prio);

          heap.pop();

          heap.set(item, prio);

          heap.decrease(item, prio);

          heap.increase(item, prio);

          heap.set(own_item, own_prio);

          heap.decrease(own_item, own_prio);

          heap.increase(own_item, own_prio);

          heap.erase(item);

          heap.erase(own_item);

          heap.clear();

          own_state = heap.state(own_item);

          heap.state(own_item, own_state);

          own_state = _Heap::PRE_HEAP;

          own_state = _Heap::IN_HEAP;

          own_state = _Heap::POST_HEAP;

        }

        _Heap& heap;

        ItemIntMap& map;

      };

    };

    /// @}

  } // namespace lemon

}

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

#include <lemon/core.h>

#include <lemon/concept_check.h>

///\ingroup map_concepts

///\file

///\brief The concept of maps.

namespace lemon {

  namespace concepts {

    /// \addtogroup map_concepts

    /// @{

    /// Readable map concept

    /// Readable map concept.

    ///

    template<typename K, typename T>

    class ReadMap

    {

    public:

      /// The key type of the map.

      typedef K Key;

      /// \brief The value type of the map.

      /// (The type of objects associated with the keys).

      typedef T Value;

      /// Returns the value associated with the given key.

      Value operator[](const Key &) const {

        return *static_cast<Value *>(0);

      }

      template<typename _ReadMap>

      struct Constraints {

        void constraints() {

          Value val = m[key];

          val = m[key];

          typename _ReadMap::Value own_val = m[own_key];

          own_val = m[own_key];

          ignore_unused_variable_warning(key);

          ignore_unused_variable_warning(val);

          ignore_unused_variable_warning(own_key);

          ignore_unused_variable_warning(own_val);

        }

        const Key& key;

        const typename _ReadMap::Key& own_key;

        const _ReadMap& m;

      };

    };

    /// Writable map concept

    /// Writable map concept.

    ///

    template<typename K, typename T>

    class WriteMap

    {

    public:

      /// The key type of the map.

      typedef K Key;

      /// \brief The value type of the map.

      /// (The type of objects associated with the keys).

      typedef T Value;

      /// Sets the value associated with the given key.

      void set(const Key &, const Value &) {}

      /// Default constructor.

      WriteMap() {}

      template <typename _WriteMap>

      struct Constraints {

        void constraints() {

          m.set(key, val);

          m.set(own_key, own_val);

          ignore_unused_variable_warning(key);

          ignore_unused_variable_warning(val);

          ignore_unused_variable_warning(own_key);

          ignore_unused_variable_warning(own_val);

        }

        const Key& key;

        const Value& val;

        const typename _WriteMap::Key& own_key;

        const typename _WriteMap::Value& own_val;

        _WriteMap& m;

      };

    };

    /// Read/writable map concept

    class ReadWriteMap : public ReadMap<K,T>,

                         public WriteMap<K,T>

    {

    public:

      /// The key type of the map.

      typedef K Key;

      /// \brief The value type of the map.

      /// (The type of objects associated with the keys).

      typedef T Value;

      /// Returns the value associated with the given key.

      Value operator[](const Key &) const {

        return *static_cast<Value *>(0);

      }

      /// Sets the value associated with the given key.

      void set(const Key &, const Value &) {}

      template<typename _ReadWriteMap>

      struct Constraints {

        void constraints() {

          checkConcept<ReadMap<K, T>, _ReadWriteMap >();

          checkConcept<WriteMap<K, T>, _ReadWriteMap >();

        }

      };

    };

    /// Dereferable map concept

    /// Dereferable map concept.

    ///

    template<typename K, typename T, typename R, typename CR>

    class ReferenceMap : public ReadWriteMap<K,T>

    {

    public:

      /// Tag for reference maps.

      typedef True ReferenceMapTag;

      /// The key type of the map.

      typedef K Key;

      /// \brief The value type of the map.

      /// (The type of objects associated with the keys).

      typedef T Value;

      /// The reference type of the map.

      typedef R Reference;

      /// The const reference type of the map.

      typedef CR ConstReference;

    public:

      /// Returns a reference to the value associated with the given key.

      Reference operator[](const Key &) {

        return *static_cast<Value *>(0);

      }

      /// Returns a const reference to the value associated with the given key.

      ConstReference operator[](const Key &) const {

        return *static_cast<Value *>(0);

      }

      /// Sets the value associated with the given key.

      void set(const Key &k,const Value &t) { operator[](k)=t; }

      template<typename _ReferenceMap>

      struct Constraints {

        void constraints() {

          checkConcept<ReadWriteMap<K, T>, _ReferenceMap >();

          ref = m[key];

          m[key] = val;

          m[key] = ref;

          m[key] = cref;

          own_ref = m[own_key];

          m[own_key] = own_val;

          m[own_key] = own_ref;

          m[own_key] = own_cref;

          m[key] = m[own_key];

          m[own_key] = m[key];

        }

        const Key& key;

        Value& val;

        Reference ref;

        ConstReference cref;

        const typename _ReferenceMap::Key& own_key;

        typename _ReferenceMap::Value& own_val;

        typename _ReferenceMap::Reference own_ref;

        typename _ReferenceMap::ConstReference own_cref;

        _ReferenceMap& m;

      };

    };

    // @}

  } //namespace concepts

} //namespace lemon

/* -*- mode: C++; indent-tabs-mode: nil; -*-

 *

 * This file is a part of LEMON, a generic C++ optimization library.

 *

 * Copyright (C) 2003-2009

 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport

 * (Egervary Research Group on Combinatorial Optimization, EGRES).

 *

 * Permission to use, modify and distribute this software is granted

 * provided that this copyright notice appears in all copies. For

 * precise terms see the accompanying LICENSE file.

 *

 * This software is provided "AS IS" with no warranty of any kind,

 * express or implied, and with no claim as to its suitability for any

 * purpose.

 *

 */

///\ingroup concept

///\file

///\brief Classes for representing paths in digraphs.

///

#include <lemon/core.h>

#include <lemon/concept_check.h>