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Changeset 1259:8b2d4e5d96e4 in lemon for lemon/concepts/heap.h


Ignore:
Timestamp:
08/07/13 06:55:05 (11 years ago)
Author:
Alpar Juttner <alpar@…>
Branch:
default
Parents:
1174:a26b90a17c81 (diff), 1257:3e711ee55d31 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Phase:
public
Message:

Merge #294 to branches >=1.2

Files:
2 edited

Legend:

Unmodified
Added
Removed

  • lemon/concepts/heap.h

    r1127 r1259  
    261261          item=Item();
    262262          prio=Prio();
    263           ignore_unused_variable_warning(item);
    264           ignore_unused_variable_warning(prio);
     263          ::lemon::ignore_unused_variable_warning(item);
     264          ::lemon::ignore_unused_variable_warning(prio);
    265265
    266266          OwnItem own_item;
    … …  
    269269          own_item=Item();
    270270          own_prio=Prio();
    271           ignore_unused_variable_warning(own_item);
    272           ignore_unused_variable_warning(own_prio);
    273           ignore_unused_variable_warning(own_state);
     271          ::lemon::ignore_unused_variable_warning(own_item);
     272          ::lemon::ignore_unused_variable_warning(own_prio);
     273          ::lemon::ignore_unused_variable_warning(own_state);
    274274
    275275          _Heap heap1(map);
    276276          _Heap heap2 = heap1;
    277           ignore_unused_variable_warning(heap1);
    278           ignore_unused_variable_warning(heap2);
     277          ::lemon::ignore_unused_variable_warning(heap1);
     278          ::lemon::ignore_unused_variable_warning(heap2);
    279279
    280280          int s = heap.size();
    281           ignore_unused_variable_warning(s);
     281          ::lemon::ignore_unused_variable_warning(s);
    282282          bool e = heap.empty();
    283           ignore_unused_variable_warning(e);
     283          ::lemon::ignore_unused_variable_warning(e);
    284284
    285285          prio = heap.prio();

  • lemon/concepts/heap.h

    r1257 r1259  
    33 * This file is a part of LEMON, a generic C++ optimization library.
    44 *
    5  * Copyright (C) 2003-2009
     5 * Copyright (C) 2003-2010
    66 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
    77 * (Egervary Research Group on Combinatorial Optimization, EGRES).
    … …  
    1717 */
    1818
     19#ifndef LEMON_CONCEPTS_HEAP_H
     20#define LEMON_CONCEPTS_HEAP_H
     21
    1922///\ingroup concept
    2023///\file
    2124///\brief The concept of heaps.
    2225
    23 #ifndef LEMON_CONCEPTS_HEAP_H
    24 #define LEMON_CONCEPTS_HEAP_H
    25 
    2626#include <lemon/core.h>
    2727#include <lemon/concept_check.h>
    … …  
    3636    /// \brief The heap concept.
    3737    ///
    38     /// Concept class describing the main interface of heaps. A \e heap
    39     /// is a data structure for storing items with specified values called
    40     /// \e priorities in such a way that finding the item with minimum
    41     /// priority is efficient. In a heap one can change the priority of an
    42     /// item, add or erase an item, etc.
     38    /// This concept class describes the main interface of heaps.
     39    /// The various \ref heaps "heap structures" are efficient
     40    /// implementations of the abstract data type \e priority \e queue.
     41    /// They store items with specified values called \e priorities
     42    /// in such a way that finding and removing the item with minimum
     43    /// priority are efficient. The basic operations are adding and
     44    /// erasing items, changing the priority of an item, etc.
    4345    ///
    44     /// \tparam PR Type of the priority of the items.
    45     /// \tparam IM A read and writable item map with int values, used
     46    /// Heaps are crucial in several algorithms, such as Dijkstra and Prim.
     47    /// Any class that conforms to this concept can be used easily in such
     48    /// algorithms.
     49    ///
     50    /// \tparam PR Type of the priorities of the items.
     51    /// \tparam IM A read-writable item map with \c int values, used
    4652    /// internally to handle the cross references.
    47     /// \tparam Comp A functor class for the ordering of the priorities.
     53    /// \tparam CMP A functor class for comparing the priorities.
    4854    /// The default is \c std::less<PR>.
    4955#ifdef DOXYGEN
    50     template <typename PR, typename IM, typename Comp = std::less<PR> >
    51 #else
    52     template <typename PR, typename IM>
     56    template <typename PR, typename IM, typename CMP>
     57#else
     58    template <typename PR, typename IM, typename CMP = std::less<PR> >
    5359#endif
    5460    class Heap {
    … …  
    6571      ///
    6672      /// Each item has a state associated to it. It can be "in heap",
    67       /// "pre heap" or "post heap". The later two are indifferent
    68       /// from the point of view of the heap, but may be useful for
    69       /// the user.
     73      /// "pre-heap" or "post-heap". The latter two are indifferent from the
     74      /// heap's point of view, but may be useful to the user.
    7075      ///
    7176      /// The item-int map must be initialized in such way that it assigns
    … …  
    7378      enum State {
    7479        IN_HEAP = 0,    ///< = 0. The "in heap" state constant.
    75         PRE_HEAP = -1,  ///< = -1. The "pre heap" state constant.
    76         POST_HEAP = -2  ///< = -2. The "post heap" state constant.
     80        PRE_HEAP = -1,  ///< = -1. The "pre-heap" state constant.
     81        POST_HEAP = -2  ///< = -2. The "post-heap" state constant.
    7782      };
    7883
    79       /// \brief The constructor.
    80       ///
    81       /// The constructor.
     84      /// \brief Constructor.
     85      ///
     86      /// Constructor.
    8287      /// \param map A map that assigns \c int values to keys of type
    8388      /// \c Item. It is used internally by the heap implementations to
    8489      /// handle the cross references. The assigned value must be
    85       /// \c PRE_HEAP (<tt>-1</tt>) for every item.
     90      /// \c PRE_HEAP (<tt>-1</tt>) for each item.
     91#ifdef DOXYGEN
    8692      explicit Heap(ItemIntMap &map) {}
     93#else
     94      explicit Heap(ItemIntMap&) {}
     95#endif
     96
     97      /// \brief Constructor.
     98      ///
     99      /// Constructor.
     100      /// \param map A map that assigns \c int values to keys of type
     101      /// \c Item. It is used internally by the heap implementations to
     102      /// handle the cross references. The assigned value must be
     103      /// \c PRE_HEAP (<tt>-1</tt>) for each item.
     104      /// \param comp The function object used for comparing the priorities.
     105#ifdef DOXYGEN
     106      explicit Heap(ItemIntMap &map, const CMP &comp) {}
     107#else
     108      explicit Heap(ItemIntMap&, const CMP&) {}
     109#endif
    87110
    88111      /// \brief The number of items stored in the heap.
    89112      ///
    90       /// Returns the number of items stored in the heap.
     113      /// This function returns the number of items stored in the heap.
    91114      int size() const { return 0; }
    92115
    93       /// \brief Checks if the heap is empty.
    94       ///
    95       /// Returns \c true if the heap is empty.
     116      /// \brief Check if the heap is empty.
     117      ///
     118      /// This function returns \c true if the heap is empty.
    96119      bool empty() const { return false; }
    97120
    98       /// \brief Makes the heap empty.
    99       ///
    100       /// Makes the heap empty.
    101       void clear();
    102 
    103       /// \brief Inserts an item into the heap with the given priority.
    104       ///
    105       /// Inserts the given item into the heap with the given priority.
     121      /// \brief Make the heap empty.
     122      ///
     123      /// This functon makes the heap empty.
     124      /// It does not change the cross reference map. If you want to reuse
     125      /// a heap that is not surely empty, you should first clear it and
     126      /// then you should set the cross reference map to \c PRE_HEAP
     127      /// for each item.
     128      void clear() {}
     129
     130      /// \brief Insert an item into the heap with the given priority.
     131      ///
     132      /// This function inserts the given item into the heap with the
     133      /// given priority.
    106134      /// \param i The item to insert.
    107135      /// \param p The priority of the item.
     136      /// \pre \e i must not be stored in the heap.
     137#ifdef DOXYGEN
    108138      void push(const Item &i, const Prio &p) {}
    109 
    110       /// \brief Returns the item having minimum priority.
    111       ///
    112       /// Returns the item having minimum priority.
     139#else
     140      void push(const Item&, const Prio&) {}
     141#endif
     142
     143      /// \brief Return the item having minimum priority.
     144      ///
     145      /// This function returns the item having minimum priority.
    113146      /// \pre The heap must be non-empty.
    114       Item top() const {}
     147      Item top() const { return Item(); }
    115148
    116149      /// \brief The minimum priority.
    117150      ///
    118       /// Returns the minimum priority.
     151      /// This function returns the minimum priority.
    119152      /// \pre The heap must be non-empty.
    120       Prio prio() const {}
    121 
    122       /// \brief Removes the item having minimum priority.
    123       ///
    124       /// Removes the item having minimum priority.
     153      Prio prio() const { return Prio(); }
     154
     155      /// \brief Remove the item having minimum priority.
     156      ///
     157      /// This function removes the item having minimum priority.
    125158      /// \pre The heap must be non-empty.
    126159      void pop() {}
    127160
    128       /// \brief Removes an item from the heap.
    129       ///
    130       /// Removes the given item from the heap if it is already stored.
     161      /// \brief Remove the given item from the heap.
     162      ///
     163      /// This function removes the given item from the heap if it is
     164      /// already stored.
    131165      /// \param i The item to delete.
     166      /// \pre \e i must be in the heap.
     167#ifdef DOXYGEN
    132168      void erase(const Item &i) {}
    133 
    134       /// \brief The priority of an item.
    135       ///
    136       /// Returns the priority of the given item.
    137       /// \param i The item.
    138       /// \pre \c i must be in the heap.
     169#else
     170      void erase(const Item&) {}
     171#endif
     172
     173      /// \brief The priority of the given item.
     174      ///
     175      /// This function returns the priority of the given item.
     176      /// \param i The item.
     177      /// \pre \e i must be in the heap.
     178#ifdef DOXYGEN
    139179      Prio operator[](const Item &i) const {}
    140 
    141       /// \brief Sets the priority of an item or inserts it, if it is
     180#else
     181      Prio operator[](const Item&) const { return Prio(); }
     182#endif
     183
     184      /// \brief Set the priority of an item or insert it, if it is
    142185      /// not stored in the heap.
    143186      ///
    144187      /// This method sets the priority of the given item if it is
    145       /// already stored in the heap.
    146       /// Otherwise it inserts the given item with the given priority.
     188      /// already stored in the heap. Otherwise it inserts the given
     189      /// item into the heap with the given priority.
    147190      ///
    148191      /// \param i The item.
    149192      /// \param p The priority.
     193#ifdef DOXYGEN
    150194      void set(const Item &i, const Prio &p) {}
    151 
    152       /// \brief Decreases the priority of an item to the given value.
    153       ///
    154       /// Decreases the priority of an item to the given value.
     195#else
     196      void set(const Item&, const Prio&) {}
     197#endif
     198
     199      /// \brief Decrease the priority of an item to the given value.
     200      ///
     201      /// This function decreases the priority of an item to the given value.
    155202      /// \param i The item.
    156203      /// \param p The priority.
    157       /// \pre \c i must be stored in the heap with priority at least \c p.
     204      /// \pre \e i must be stored in the heap with priority at least \e p.
     205#ifdef DOXYGEN
    158206      void decrease(const Item &i, const Prio &p) {}
    159 
    160       /// \brief Increases the priority of an item to the given value.
    161       ///
    162       /// Increases the priority of an item to the given value.
     207#else
     208      void decrease(const Item&, const Prio&) {}
     209#endif
     210
     211      /// \brief Increase the priority of an item to the given value.
     212      ///
     213      /// This function increases the priority of an item to the given value.
    163214      /// \param i The item.
    164215      /// \param p The priority.
    165       /// \pre \c i must be stored in the heap with priority at most \c p.
     216      /// \pre \e i must be stored in the heap with priority at most \e p.
     217#ifdef DOXYGEN
    166218      void increase(const Item &i, const Prio &p) {}
    167 
    168       /// \brief Returns if an item is in, has already been in, or has
    169       /// never been in the heap.
     219#else
     220      void increase(const Item&, const Prio&) {}
     221#endif
     222
     223      /// \brief Return the state of an item.
    170224      ///
    171225      /// This method returns \c PRE_HEAP if the given item has never
    … …  
    175229      /// to the heap again.
    176230      /// \param i The item.
     231#ifdef DOXYGEN
    177232      State state(const Item &i) const {}
    178 
    179       /// \brief Sets the state of an item in the heap.
    180       ///
    181       /// Sets the state of the given item in the heap. It can be used
    182       /// to manually clear the heap when it is important to achive the
    183       /// better time complexity.
     233#else
     234      State state(const Item&) const { return PRE_HEAP; }
     235#endif
     236
     237      /// \brief Set the state of an item in the heap.
     238      ///
     239      /// This function sets the state of the given item in the heap.
     240      /// It can be used to manually clear the heap when it is important
     241      /// to achive better time complexity.
    184242      /// \param i The item.
    185243      /// \param st The state. It should not be \c IN_HEAP.
     244#ifdef DOXYGEN
    186245      void state(const Item& i, State st) {}
     246#else
     247      void state(const Item&, State) {}
     248#endif
    187249
    188250
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