1 | /* -*- C++ -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library |
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4 | * |
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5 | * Copyright (C) 2003-2006 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #ifndef LEMON_BITS_MAP_EXTENDER_H |
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20 | #define LEMON_BITS_MAP_EXTENDER_H |
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21 | |
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22 | #include <iterator> |
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23 | |
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24 | #include <lemon/bits/traits.h> |
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25 | |
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26 | ///\file |
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27 | ///\brief Extenders for iterable maps. |
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28 | |
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29 | namespace lemon { |
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30 | |
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31 | /// \ingroup graphbits |
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32 | /// |
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33 | /// \brief Extender for maps |
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34 | template <typename _Map> |
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35 | class MapExtender : public _Map { |
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36 | public: |
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37 | |
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38 | typedef _Map Parent; |
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39 | typedef MapExtender Map; |
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40 | |
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41 | |
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42 | typedef typename Parent::Graph Graph; |
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43 | typedef typename Parent::Key Item; |
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44 | |
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45 | typedef typename Parent::Key Key; |
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46 | typedef typename Parent::Value Value; |
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47 | |
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48 | class MapIt; |
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49 | class ConstMapIt; |
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50 | |
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51 | friend class MapIt; |
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52 | friend class ConstMapIt; |
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53 | |
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54 | public: |
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55 | |
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56 | MapExtender(const Graph& graph) |
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57 | : Parent(graph) {} |
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58 | |
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59 | MapExtender(const Graph& graph, const Value& value) |
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60 | : Parent(graph, value) {} |
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61 | |
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62 | |
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63 | class MapIt : public Item { |
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64 | public: |
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65 | |
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66 | typedef Item Parent; |
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67 | typedef typename Map::Value Value; |
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68 | |
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69 | MapIt() {} |
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70 | |
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71 | MapIt(Invalid i) : Parent(i) { } |
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72 | |
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73 | explicit MapIt(Map& _map) : map(_map) { |
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74 | map.getNotifier()->first(*this); |
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75 | } |
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76 | |
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77 | MapIt(const Map& _map, const Item& item) |
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78 | : Parent(item), map(_map) {} |
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79 | |
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80 | MapIt& operator++() { |
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81 | map.getNotifier()->next(*this); |
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82 | return *this; |
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83 | } |
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84 | |
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85 | typename MapTraits<Map>::ConstReturnValue operator*() const { |
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86 | return map[*this]; |
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87 | } |
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88 | |
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89 | typename MapTraits<Map>::ReturnValue operator*() { |
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90 | return map[*this]; |
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91 | } |
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92 | |
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93 | void set(const Value& value) { |
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94 | map.set(*this, value); |
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95 | } |
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96 | |
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97 | protected: |
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98 | Map& map; |
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99 | |
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100 | }; |
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101 | |
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102 | class ConstMapIt : public Item { |
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103 | public: |
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104 | |
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105 | typedef Item Parent; |
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106 | |
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107 | typedef typename Map::Value Value; |
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108 | |
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109 | ConstMapIt() {} |
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110 | |
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111 | ConstMapIt(Invalid i) : Parent(i) { } |
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112 | |
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113 | explicit ConstMapIt(Map& _map) : map(_map) { |
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114 | map.getNotifier()->first(*this); |
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115 | } |
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116 | |
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117 | ConstMapIt(const Map& _map, const Item& item) |
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118 | : Parent(item), map(_map) {} |
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119 | |
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120 | ConstMapIt& operator++() { |
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121 | map.getNotifier()->next(*this); |
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122 | return *this; |
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123 | } |
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124 | |
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125 | typename MapTraits<Map>::ConstReturnValue operator*() const { |
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126 | return map[*this]; |
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127 | } |
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128 | |
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129 | protected: |
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130 | const Map& map; |
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131 | }; |
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132 | |
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133 | class ItemIt : Item { |
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134 | public: |
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135 | |
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136 | typedef Item Parent; |
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137 | |
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138 | ItemIt() {} |
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139 | |
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140 | ItemIt(Invalid i) : Parent(i) { } |
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141 | |
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142 | explicit ItemIt(Map& _map) : map(_map) { |
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143 | map->getNotifier()->first(*this); |
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144 | } |
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145 | |
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146 | ItemIt(const Map& _map, const Item& item) |
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147 | : Parent(item), map(_map) {} |
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148 | |
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149 | ItemIt& operator++() { |
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150 | map.getNotifier()->next(*this); |
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151 | return *this; |
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152 | } |
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153 | |
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154 | protected: |
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155 | const Map& map; |
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156 | |
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157 | }; |
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158 | }; |
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159 | |
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160 | } |
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161 | |
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162 | #endif |
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