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) 2003-2008 |
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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_MAPS_H |
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20 | #define LEMON_MAPS_H |
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21 | |
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22 | #include <iterator> |
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23 | #include <functional> |
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24 | #include <vector> |
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25 | |
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26 | #include <lemon/bits/utility.h> |
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27 | #include <lemon/bits/traits.h> |
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28 | |
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29 | ///\file |
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30 | ///\ingroup maps |
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31 | ///\brief Miscellaneous property maps |
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32 | |
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33 | #include <map> |
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34 | |
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35 | namespace lemon { |
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36 | |
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37 | /// \addtogroup maps |
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38 | /// @{ |
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39 | |
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40 | /// Base class of maps. |
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41 | |
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42 | /// Base class of maps. It provides the necessary type definitions |
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43 | /// required by the map %concepts. |
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44 | template<typename K, typename V> |
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45 | class MapBase { |
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46 | public: |
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47 | /// \biref The key type of the map. |
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48 | typedef K Key; |
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49 | /// \brief The value type of the map. |
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50 | /// (The type of objects associated with the keys). |
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51 | typedef V Value; |
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52 | }; |
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53 | |
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54 | |
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55 | /// Null map. (a.k.a. DoNothingMap) |
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56 | |
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57 | /// This map can be used if you have to provide a map only for |
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58 | /// its type definitions, or if you have to provide a writable map, |
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59 | /// but data written to it is not required (i.e. it will be sent to |
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60 | /// <tt>/dev/null</tt>). |
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61 | /// It conforms the \ref concepts::ReadWriteMap "ReadWriteMap" concept. |
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62 | /// |
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63 | /// \sa ConstMap |
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64 | template<typename K, typename V> |
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65 | class NullMap : public MapBase<K, V> { |
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66 | public: |
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67 | typedef MapBase<K, V> Parent; |
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68 | typedef typename Parent::Key Key; |
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69 | typedef typename Parent::Value Value; |
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70 | |
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71 | /// Gives back a default constructed element. |
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72 | Value operator[](const Key&) const { return Value(); } |
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73 | /// Absorbs the value. |
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74 | void set(const Key&, const Value&) {} |
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75 | }; |
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76 | |
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77 | /// Returns a \ref NullMap class |
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78 | |
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79 | /// This function just returns a \ref NullMap class. |
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80 | /// \relates NullMap |
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81 | template <typename K, typename V> |
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82 | NullMap<K, V> nullMap() { |
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83 | return NullMap<K, V>(); |
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84 | } |
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85 | |
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86 | |
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87 | /// Constant map. |
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88 | |
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89 | /// This \ref concepts::ReadMap "readable map" assigns a specified |
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90 | /// value to each key. |
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91 | /// |
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92 | /// In other aspects it is equivalent to \ref NullMap. |
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93 | /// So it conforms the \ref concepts::ReadWriteMap "ReadWriteMap" |
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94 | /// concept, but it absorbs the data written to it. |
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95 | /// |
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96 | /// The simplest way of using this map is through the constMap() |
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97 | /// function. |
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98 | /// |
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99 | /// \sa NullMap |
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100 | /// \sa IdentityMap |
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101 | template<typename K, typename V> |
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102 | class ConstMap : public MapBase<K, V> { |
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103 | private: |
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104 | V _value; |
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105 | public: |
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106 | typedef MapBase<K, V> Parent; |
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107 | typedef typename Parent::Key Key; |
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108 | typedef typename Parent::Value Value; |
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109 | |
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110 | /// Default constructor |
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111 | |
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112 | /// Default constructor. |
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113 | /// The value of the map will be default constructed. |
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114 | ConstMap() {} |
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115 | |
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116 | /// Constructor with specified initial value |
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117 | |
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118 | /// Constructor with specified initial value. |
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119 | /// \param v is the initial value of the map. |
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120 | ConstMap(const Value &v) : _value(v) {} |
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121 | |
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122 | /// Gives back the specified value. |
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123 | Value operator[](const Key&) const { return _value; } |
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124 | |
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125 | /// Absorbs the value. |
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126 | void set(const Key&, const Value&) {} |
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127 | |
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128 | /// Sets the value that is assigned to each key. |
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129 | void setAll(const Value &v) { |
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130 | _value = v; |
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131 | } |
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132 | |
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133 | template<typename V1> |
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134 | ConstMap(const ConstMap<K, V1> &, const Value &v) : _value(v) {} |
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135 | }; |
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136 | |
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137 | /// Returns a \ref ConstMap class |
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138 | |
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139 | /// This function just returns a \ref ConstMap class. |
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140 | /// \relates ConstMap |
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141 | template<typename K, typename V> |
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142 | inline ConstMap<K, V> constMap(const V &v) { |
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143 | return ConstMap<K, V>(v); |
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144 | } |
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145 | |
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146 | |
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147 | template<typename T, T v> |
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148 | struct Const {}; |
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149 | |
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150 | /// Constant map with inlined constant value. |
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151 | |
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152 | /// This \ref concepts::ReadMap "readable map" assigns a specified |
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153 | /// value to each key. |
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154 | /// |
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155 | /// In other aspects it is equivalent to \ref NullMap. |
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156 | /// So it conforms the \ref concepts::ReadWriteMap "ReadWriteMap" |
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157 | /// concept, but it absorbs the data written to it. |
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158 | /// |
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159 | /// The simplest way of using this map is through the constMap() |
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160 | /// function. |
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161 | /// |
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162 | /// \sa NullMap |
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163 | /// \sa IdentityMap |
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164 | template<typename K, typename V, V v> |
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165 | class ConstMap<K, Const<V, v> > : public MapBase<K, V> { |
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166 | public: |
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167 | typedef MapBase<K, V> Parent; |
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168 | typedef typename Parent::Key Key; |
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169 | typedef typename Parent::Value Value; |
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170 | |
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171 | /// Constructor. |
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172 | ConstMap() {} |
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173 | |
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174 | /// Gives back the specified value. |
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175 | Value operator[](const Key&) const { return v; } |
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176 | |
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177 | /// Absorbs the value. |
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178 | void set(const Key&, const Value&) {} |
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179 | }; |
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180 | |
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181 | /// Returns a \ref ConstMap class with inlined constant value |
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182 | |
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183 | /// This function just returns a \ref ConstMap class with inlined |
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184 | /// constant value. |
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185 | /// \relates ConstMap |
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186 | template<typename K, typename V, V v> |
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187 | inline ConstMap<K, Const<V, v> > constMap() { |
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188 | return ConstMap<K, Const<V, v> >(); |
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189 | } |
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190 | |
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191 | |
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192 | /// Identity map. |
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193 | |
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194 | /// This \ref concepts::ReadMap "read-only map" gives back the given |
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195 | /// key as value without any modification. |
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196 | /// |
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197 | /// \sa ConstMap |
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198 | template <typename T> |
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199 | class IdentityMap : public MapBase<T, T> { |
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200 | public: |
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201 | typedef MapBase<T, T> Parent; |
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202 | typedef typename Parent::Key Key; |
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203 | typedef typename Parent::Value Value; |
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204 | |
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205 | /// Gives back the given value without any modification. |
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206 | Value operator[](const Key &k) const { |
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207 | return k; |
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208 | } |
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209 | }; |
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210 | |
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211 | /// Returns an \ref IdentityMap class |
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212 | |
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213 | /// This function just returns an \ref IdentityMap class. |
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214 | /// \relates IdentityMap |
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215 | template<typename T> |
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216 | inline IdentityMap<T> identityMap() { |
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217 | return IdentityMap<T>(); |
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218 | } |
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219 | |
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220 | |
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221 | /// \brief Map for storing values for integer keys from the range |
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222 | /// <tt>[0..size-1]</tt>. |
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223 | /// |
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224 | /// This map is essentially a wrapper for \c std::vector. It assigns |
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225 | /// values to integer keys from the range <tt>[0..size-1]</tt>. |
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226 | /// It can be used with some data structures, for example |
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227 | /// \ref UnionFind, \ref BinHeap, when the used items are small |
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228 | /// integers. This map conforms the \ref concepts::ReferenceMap |
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229 | /// "ReferenceMap" concept. |
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230 | /// |
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231 | /// The simplest way of using this map is through the rangeMap() |
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232 | /// function. |
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233 | template <typename V> |
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234 | class RangeMap : public MapBase<int, V> { |
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235 | template <typename V1> |
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236 | friend class RangeMap; |
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237 | private: |
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238 | |
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239 | typedef std::vector<V> Vector; |
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240 | Vector _vector; |
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241 | |
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242 | public: |
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243 | |
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244 | typedef MapBase<int, V> Parent; |
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245 | /// Key type |
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246 | typedef typename Parent::Key Key; |
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247 | /// Value type |
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248 | typedef typename Parent::Value Value; |
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249 | /// Reference type |
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250 | typedef typename Vector::reference Reference; |
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251 | /// Const reference type |
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252 | typedef typename Vector::const_reference ConstReference; |
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253 | |
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254 | typedef True ReferenceMapTag; |
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255 | |
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256 | public: |
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257 | |
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258 | /// Constructor with specified default value. |
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259 | RangeMap(int size = 0, const Value &value = Value()) |
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260 | : _vector(size, value) {} |
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261 | |
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262 | /// Constructs the map from an appropriate \c std::vector. |
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263 | template <typename V1> |
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264 | RangeMap(const std::vector<V1>& vector) |
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265 | : _vector(vector.begin(), vector.end()) {} |
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266 | |
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267 | /// Constructs the map from another \ref RangeMap. |
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268 | template <typename V1> |
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269 | RangeMap(const RangeMap<V1> &c) |
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270 | : _vector(c._vector.begin(), c._vector.end()) {} |
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271 | |
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272 | /// Returns the size of the map. |
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273 | int size() { |
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274 | return _vector.size(); |
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275 | } |
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276 | |
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277 | /// Resizes the map. |
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278 | |
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279 | /// Resizes the underlying \c std::vector container, so changes the |
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280 | /// keyset of the map. |
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281 | /// \param size The new size of the map. The new keyset will be the |
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282 | /// range <tt>[0..size-1]</tt>. |
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283 | /// \param value The default value to assign to the new keys. |
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284 | void resize(int size, const Value &value = Value()) { |
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285 | _vector.resize(size, value); |
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286 | } |
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287 | |
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288 | private: |
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289 | |
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290 | RangeMap& operator=(const RangeMap&); |
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291 | |
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292 | public: |
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293 | |
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294 | ///\e |
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295 | Reference operator[](const Key &k) { |
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296 | return _vector[k]; |
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297 | } |
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298 | |
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299 | ///\e |
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300 | ConstReference operator[](const Key &k) const { |
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301 | return _vector[k]; |
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302 | } |
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303 | |
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304 | ///\e |
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305 | void set(const Key &k, const Value &v) { |
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306 | _vector[k] = v; |
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307 | } |
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308 | }; |
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309 | |
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310 | /// Returns a \ref RangeMap class |
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311 | |
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312 | /// This function just returns a \ref RangeMap class. |
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313 | /// \relates RangeMap |
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314 | template<typename V> |
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315 | inline RangeMap<V> rangeMap(int size = 0, const V &value = V()) { |
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316 | return RangeMap<V>(size, value); |
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317 | } |
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318 | |
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319 | /// \brief Returns a \ref RangeMap class created from an appropriate |
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320 | /// \c std::vector |
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321 | |
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322 | /// This function just returns a \ref RangeMap class created from an |
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323 | /// appropriate \c std::vector. |
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324 | /// \relates RangeMap |
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325 | template<typename V> |
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326 | inline RangeMap<V> rangeMap(const std::vector<V> &vector) { |
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327 | return RangeMap<V>(vector); |
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328 | } |
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329 | |
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330 | |
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331 | /// Map type based on \c std::map |
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332 | |
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333 | /// This map is essentially a wrapper for \c std::map with addition |
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334 | /// that you can specify a default value for the keys that are not |
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335 | /// stored actually. This value can be different from the default |
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336 | /// contructed value (i.e. \c %Value()). |
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337 | /// This type conforms the \ref concepts::ReferenceMap "ReferenceMap" |
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338 | /// concept. |
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339 | /// |
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340 | /// This map is useful if a default value should be assigned to most of |
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341 | /// the keys and different values should be assigned only to a few |
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342 | /// keys (i.e. the map is "sparse"). |
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343 | /// The name of this type also refers to this important usage. |
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344 | /// |
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345 | /// Apart form that this map can be used in many other cases since it |
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346 | /// is based on \c std::map, which is a general associative container. |
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347 | /// However keep in mind that it is usually not as efficient as other |
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348 | /// maps. |
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349 | /// |
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350 | /// The simplest way of using this map is through the sparseMap() |
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351 | /// function. |
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352 | template <typename K, typename V, typename Compare = std::less<K> > |
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353 | class SparseMap : public MapBase<K, V> { |
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354 | template <typename K1, typename V1, typename C1> |
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355 | friend class SparseMap; |
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356 | public: |
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357 | |
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358 | typedef MapBase<K, V> Parent; |
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359 | /// Key type |
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360 | typedef typename Parent::Key Key; |
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361 | /// Value type |
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362 | typedef typename Parent::Value Value; |
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363 | /// Reference type |
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364 | typedef Value& Reference; |
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365 | /// Const reference type |
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366 | typedef const Value& ConstReference; |
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367 | |
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368 | typedef True ReferenceMapTag; |
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369 | |
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370 | private: |
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371 | |
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372 | typedef std::map<K, V, Compare> Map; |
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373 | Map _map; |
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374 | Value _value; |
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375 | |
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376 | public: |
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377 | |
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378 | /// \brief Constructor with specified default value. |
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379 | SparseMap(const Value &value = Value()) : _value(value) {} |
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380 | /// \brief Constructs the map from an appropriate \c std::map, and |
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381 | /// explicitly specifies a default value. |
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382 | template <typename V1, typename Comp1> |
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383 | SparseMap(const std::map<Key, V1, Comp1> &map, |
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384 | const Value &value = Value()) |
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385 | : _map(map.begin(), map.end()), _value(value) {} |
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386 | |
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387 | /// \brief Constructs the map from another \ref SparseMap. |
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388 | template<typename V1, typename Comp1> |
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389 | SparseMap(const SparseMap<Key, V1, Comp1> &c) |
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390 | : _map(c._map.begin(), c._map.end()), _value(c._value) {} |
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391 | |
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392 | private: |
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393 | |
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394 | SparseMap& operator=(const SparseMap&); |
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395 | |
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396 | public: |
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397 | |
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398 | ///\e |
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399 | Reference operator[](const Key &k) { |
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400 | typename Map::iterator it = _map.lower_bound(k); |
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401 | if (it != _map.end() && !_map.key_comp()(k, it->first)) |
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402 | return it->second; |
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403 | else |
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404 | return _map.insert(it, std::make_pair(k, _value))->second; |
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405 | } |
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406 | |
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407 | ///\e |
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408 | ConstReference operator[](const Key &k) const { |
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409 | typename Map::const_iterator it = _map.find(k); |
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410 | if (it != _map.end()) |
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411 | return it->second; |
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412 | else |
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413 | return _value; |
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414 | } |
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415 | |
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416 | ///\e |
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417 | void set(const Key &k, const Value &v) { |
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418 | typename Map::iterator it = _map.lower_bound(k); |
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419 | if (it != _map.end() && !_map.key_comp()(k, it->first)) |
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420 | it->second = v; |
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421 | else |
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422 | _map.insert(it, std::make_pair(k, v)); |
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423 | } |
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424 | |
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425 | ///\e |
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426 | void setAll(const Value &v) { |
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427 | _value = v; |
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428 | _map.clear(); |
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429 | } |
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430 | }; |
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431 | |
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432 | /// Returns a \ref SparseMap class |
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433 | |
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434 | /// This function just returns a \ref SparseMap class with specified |
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435 | /// default value. |
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436 | /// \relates SparseMap |
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437 | template<typename K, typename V, typename Compare> |
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438 | inline SparseMap<K, V, Compare> sparseMap(const V& value = V()) { |
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439 | return SparseMap<K, V, Compare>(value); |
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440 | } |
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441 | |
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442 | template<typename K, typename V> |
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443 | inline SparseMap<K, V, std::less<K> > sparseMap(const V& value = V()) { |
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444 | return SparseMap<K, V, std::less<K> >(value); |
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445 | } |
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446 | |
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447 | /// \brief Returns a \ref SparseMap class created from an appropriate |
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448 | /// \c std::map |
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449 | |
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450 | /// This function just returns a \ref SparseMap class created from an |
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451 | /// appropriate \c std::map. |
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452 | /// \relates SparseMap |
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453 | template<typename K, typename V, typename Compare> |
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454 | inline SparseMap<K, V, Compare> |
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455 | sparseMap(const std::map<K, V, Compare> &map, const V& value = V()) |
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456 | { |
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457 | return SparseMap<K, V, Compare>(map, value); |
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458 | } |
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459 | |
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460 | /// @} |
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461 | |
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462 | /// \addtogroup map_adaptors |
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463 | /// @{ |
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464 | |
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465 | /// Composition of two maps |
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466 | |
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467 | /// This \ref concepts::ReadMap "read-only map" returns the |
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468 | /// composition of two given maps. That is to say, if \c m1 is of |
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469 | /// type \c M1 and \c m2 is of \c M2, then for |
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470 | /// \code |
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471 | /// ComposeMap<M1, M2> cm(m1,m2); |
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472 | /// \endcode |
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473 | /// <tt>cm[x]</tt> will be equal to <tt>m1[m2[x]]</tt>. |
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474 | /// |
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475 | /// The \c Key type of the map is inherited from \c M2 and the |
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476 | /// \c Value type is from \c M1. |
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477 | /// \c M2::Value must be convertible to \c M1::Key. |
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478 | /// |
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479 | /// The simplest way of using this map is through the composeMap() |
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480 | /// function. |
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481 | /// |
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482 | /// \sa CombineMap |
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483 | /// |
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484 | /// \todo Check the requirements. |
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485 | template <typename M1, typename M2> |
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486 | class ComposeMap : public MapBase<typename M2::Key, typename M1::Value> { |
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487 | const M1 &_m1; |
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488 | const M2 &_m2; |
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489 | public: |
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490 | typedef MapBase<typename M2::Key, typename M1::Value> Parent; |
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491 | typedef typename Parent::Key Key; |
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492 | typedef typename Parent::Value Value; |
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493 | |
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494 | /// Constructor |
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495 | ComposeMap(const M1 &m1, const M2 &m2) : _m1(m1), _m2(m2) {} |
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496 | |
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497 | /// \e |
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498 | typename MapTraits<M1>::ConstReturnValue |
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499 | operator[](const Key &k) const { return _m1[_m2[k]]; } |
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500 | }; |
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501 | |
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502 | /// Returns a \ref ComposeMap class |
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503 | |
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504 | /// This function just returns a \ref ComposeMap class. |
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505 | /// |
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506 | /// If \c m1 and \c m2 are maps and the \c Value type of \c m2 is |
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507 | /// convertible to the \c Key of \c m1, then <tt>composeMap(m1,m2)[x]</tt> |
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508 | /// will be equal to <tt>m1[m2[x]]</tt>. |
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509 | /// |
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510 | /// \relates ComposeMap |
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511 | template <typename M1, typename M2> |
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512 | inline ComposeMap<M1, M2> composeMap(const M1 &m1, const M2 &m2) { |
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513 | return ComposeMap<M1, M2>(m1, m2); |
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514 | } |
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515 | |
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516 | |
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517 | /// Combination of two maps using an STL (binary) functor. |
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518 | |
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519 | /// This \ref concepts::ReadMap "read-only map" takes two maps and a |
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520 | /// binary functor and returns the combination of the two given maps |
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521 | /// using the functor. |
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522 | /// That is to say, if \c m1 is of type \c M1 and \c m2 is of \c M2 |
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523 | /// and \c f is of \c F, then for |
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524 | /// \code |
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525 | /// CombineMap<M1,M2,F,V> cm(m1,m2,f); |
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526 | /// \endcode |
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527 | /// <tt>cm[x]</tt> will be equal to <tt>f(m1[x],m2[x])</tt>. |
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528 | /// |
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529 | /// The \c Key type of the map is inherited from \c M1 (\c M1::Key |
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530 | /// must be convertible to \c M2::Key) and the \c Value type is \c V. |
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531 | /// \c M2::Value and \c M1::Value must be convertible to the |
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532 | /// corresponding input parameter of \c F and the return type of \c F |
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533 | /// must be convertible to \c V. |
---|
534 | /// |
---|
535 | /// The simplest way of using this map is through the combineMap() |
---|
536 | /// function. |
---|
537 | /// |
---|
538 | /// \sa ComposeMap |
---|
539 | /// |
---|
540 | /// \todo Check the requirements. |
---|
541 | template<typename M1, typename M2, typename F, |
---|
542 | typename V = typename F::result_type> |
---|
543 | class CombineMap : public MapBase<typename M1::Key, V> { |
---|
544 | const M1 &_m1; |
---|
545 | const M2 &_m2; |
---|
546 | F _f; |
---|
547 | public: |
---|
548 | typedef MapBase<typename M1::Key, V> Parent; |
---|
549 | typedef typename Parent::Key Key; |
---|
550 | typedef typename Parent::Value Value; |
---|
551 | |
---|
552 | /// Constructor |
---|
553 | CombineMap(const M1 &m1, const M2 &m2, const F &f = F()) |
---|
554 | : _m1(m1), _m2(m2), _f(f) {} |
---|
555 | /// \e |
---|
556 | Value operator[](const Key &k) const { return _f(_m1[k],_m2[k]); } |
---|
557 | }; |
---|
558 | |
---|
559 | /// Returns a \ref CombineMap class |
---|
560 | |
---|
561 | /// This function just returns a \ref CombineMap class. |
---|
562 | /// |
---|
563 | /// For example, if \c m1 and \c m2 are both maps with \c double |
---|
564 | /// values, then |
---|
565 | /// \code |
---|
566 | /// combineMap(m1,m2,std::plus<double>()) |
---|
567 | /// \endcode |
---|
568 | /// is equivalent to |
---|
569 | /// \code |
---|
570 | /// addMap(m1,m2) |
---|
571 | /// \endcode |
---|
572 | /// |
---|
573 | /// This function is specialized for adaptable binary function |
---|
574 | /// classes and C++ functions. |
---|
575 | /// |
---|
576 | /// \relates CombineMap |
---|
577 | template<typename M1, typename M2, typename F, typename V> |
---|
578 | inline CombineMap<M1, M2, F, V> |
---|
579 | combineMap(const M1 &m1, const M2 &m2, const F &f) { |
---|
580 | return CombineMap<M1, M2, F, V>(m1,m2,f); |
---|
581 | } |
---|
582 | |
---|
583 | template<typename M1, typename M2, typename F> |
---|
584 | inline CombineMap<M1, M2, F, typename F::result_type> |
---|
585 | combineMap(const M1 &m1, const M2 &m2, const F &f) { |
---|
586 | return combineMap<M1, M2, F, typename F::result_type>(m1,m2,f); |
---|
587 | } |
---|
588 | |
---|
589 | template<typename M1, typename M2, typename K1, typename K2, typename V> |
---|
590 | inline CombineMap<M1, M2, V (*)(K1, K2), V> |
---|
591 | combineMap(const M1 &m1, const M2 &m2, V (*f)(K1, K2)) { |
---|
592 | return combineMap<M1, M2, V (*)(K1, K2), V>(m1,m2,f); |
---|
593 | } |
---|
594 | |
---|
595 | |
---|
596 | /// Converts an STL style (unary) functor to a map |
---|
597 | |
---|
598 | /// This \ref concepts::ReadMap "read-only map" returns the value |
---|
599 | /// of a given functor. Actually, it just wraps the functor and |
---|
600 | /// provides the \c Key and \c Value typedefs. |
---|
601 | /// |
---|
602 | /// Template parameters \c K and \c V will become its \c Key and |
---|
603 | /// \c Value. In most cases they have to be given explicitly because |
---|
604 | /// a functor typically does not provide \c argument_type and |
---|
605 | /// \c result_type typedefs. |
---|
606 | /// Parameter \c F is the type of the used functor. |
---|
607 | /// |
---|
608 | /// The simplest way of using this map is through the functorToMap() |
---|
609 | /// function. |
---|
610 | /// |
---|
611 | /// \sa MapToFunctor |
---|
612 | template<typename F, |
---|
613 | typename K = typename F::argument_type, |
---|
614 | typename V = typename F::result_type> |
---|
615 | class FunctorToMap : public MapBase<K, V> { |
---|
616 | const F &_f; |
---|
617 | public: |
---|
618 | typedef MapBase<K, V> Parent; |
---|
619 | typedef typename Parent::Key Key; |
---|
620 | typedef typename Parent::Value Value; |
---|
621 | |
---|
622 | /// Constructor |
---|
623 | FunctorToMap(const F &f = F()) : _f(f) {} |
---|
624 | /// \e |
---|
625 | Value operator[](const Key &k) const { return _f(k); } |
---|
626 | }; |
---|
627 | |
---|
628 | /// Returns a \ref FunctorToMap class |
---|
629 | |
---|
630 | /// This function just returns a \ref FunctorToMap class. |
---|
631 | /// |
---|
632 | /// This function is specialized for adaptable binary function |
---|
633 | /// classes and C++ functions. |
---|
634 | /// |
---|
635 | /// \relates FunctorToMap |
---|
636 | template<typename K, typename V, typename F> |
---|
637 | inline FunctorToMap<F, K, V> functorToMap(const F &f) { |
---|
638 | return FunctorToMap<F, K, V>(f); |
---|
639 | } |
---|
640 | |
---|
641 | template <typename F> |
---|
642 | inline FunctorToMap<F, typename F::argument_type, typename F::result_type> |
---|
643 | functorToMap(const F &f) |
---|
644 | { |
---|
645 | return FunctorToMap<F, typename F::argument_type, |
---|
646 | typename F::result_type>(f); |
---|
647 | } |
---|
648 | |
---|
649 | template <typename K, typename V> |
---|
650 | inline FunctorToMap<V (*)(K), K, V> functorToMap(V (*f)(K)) { |
---|
651 | return FunctorToMap<V (*)(K), K, V>(f); |
---|
652 | } |
---|
653 | |
---|
654 | |
---|
655 | /// Converts a map to an STL style (unary) functor |
---|
656 | |
---|
657 | /// This class converts a map to an STL style (unary) functor. |
---|
658 | /// That is it provides an <tt>operator()</tt> to read its values. |
---|
659 | /// |
---|
660 | /// For the sake of convenience it also works as a usual |
---|
661 | /// \ref concepts::ReadMap "readable map", i.e. <tt>operator[]</tt> |
---|
662 | /// and the \c Key and \c Value typedefs also exist. |
---|
663 | /// |
---|
664 | /// The simplest way of using this map is through the mapToFunctor() |
---|
665 | /// function. |
---|
666 | /// |
---|
667 | ///\sa FunctorToMap |
---|
668 | template <typename M> |
---|
669 | class MapToFunctor : public MapBase<typename M::Key, typename M::Value> { |
---|
670 | const M &_m; |
---|
671 | public: |
---|
672 | typedef MapBase<typename M::Key, typename M::Value> Parent; |
---|
673 | typedef typename Parent::Key Key; |
---|
674 | typedef typename Parent::Value Value; |
---|
675 | |
---|
676 | typedef typename Parent::Key argument_type; |
---|
677 | typedef typename Parent::Value result_type; |
---|
678 | |
---|
679 | /// Constructor |
---|
680 | MapToFunctor(const M &m) : _m(m) {} |
---|
681 | /// \e |
---|
682 | Value operator()(const Key &k) const { return _m[k]; } |
---|
683 | /// \e |
---|
684 | Value operator[](const Key &k) const { return _m[k]; } |
---|
685 | }; |
---|
686 | |
---|
687 | /// Returns a \ref MapToFunctor class |
---|
688 | |
---|
689 | /// This function just returns a \ref MapToFunctor class. |
---|
690 | /// \relates MapToFunctor |
---|
691 | template<typename M> |
---|
692 | inline MapToFunctor<M> mapToFunctor(const M &m) { |
---|
693 | return MapToFunctor<M>(m); |
---|
694 | } |
---|
695 | |
---|
696 | |
---|
697 | /// \brief Map adaptor to convert the \c Value type of a map to |
---|
698 | /// another type using the default conversion. |
---|
699 | |
---|
700 | /// Map adaptor to convert the \c Value type of a \ref concepts::ReadMap |
---|
701 | /// "readable map" to another type using the default conversion. |
---|
702 | /// The \c Key type of it is inherited from \c M and the \c Value |
---|
703 | /// type is \c V. |
---|
704 | /// This type conforms the \ref concepts::ReadMap "ReadMap" concept. |
---|
705 | /// |
---|
706 | /// The simplest way of using this map is through the convertMap() |
---|
707 | /// function. |
---|
708 | template <typename M, typename V> |
---|
709 | class ConvertMap : public MapBase<typename M::Key, V> { |
---|
710 | const M &_m; |
---|
711 | public: |
---|
712 | typedef MapBase<typename M::Key, V> Parent; |
---|
713 | typedef typename Parent::Key Key; |
---|
714 | typedef typename Parent::Value Value; |
---|
715 | |
---|
716 | /// Constructor |
---|
717 | |
---|
718 | /// Constructor. |
---|
719 | /// \param m The underlying map. |
---|
720 | ConvertMap(const M &m) : _m(m) {} |
---|
721 | |
---|
722 | /// \e |
---|
723 | Value operator[](const Key &k) const { return _m[k]; } |
---|
724 | }; |
---|
725 | |
---|
726 | /// Returns a \ref ConvertMap class |
---|
727 | |
---|
728 | /// This function just returns a \ref ConvertMap class. |
---|
729 | /// \relates ConvertMap |
---|
730 | template<typename V, typename M> |
---|
731 | inline ConvertMap<M, V> convertMap(const M &map) { |
---|
732 | return ConvertMap<M, V>(map); |
---|
733 | } |
---|
734 | |
---|
735 | |
---|
736 | /// Applies all map setting operations to two maps |
---|
737 | |
---|
738 | /// This map has two \ref concepts::WriteMap "writable map" parameters |
---|
739 | /// and each write request will be passed to both of them. |
---|
740 | /// If \c M1 is also \ref concepts::ReadMap "readable", then the read |
---|
741 | /// operations will return the corresponding values of \c M1. |
---|
742 | /// |
---|
743 | /// The \c Key and \c Value types are inherited from \c M1. |
---|
744 | /// The \c Key and \c Value of \c M2 must be convertible from those |
---|
745 | /// of \c M1. |
---|
746 | /// |
---|
747 | /// The simplest way of using this map is through the forkMap() |
---|
748 | /// function. |
---|
749 | template<typename M1, typename M2> |
---|
750 | class ForkMap : public MapBase<typename M1::Key, typename M1::Value> { |
---|
751 | M1 &_m1; |
---|
752 | M2 &_m2; |
---|
753 | public: |
---|
754 | typedef MapBase<typename M1::Key, typename M1::Value> Parent; |
---|
755 | typedef typename Parent::Key Key; |
---|
756 | typedef typename Parent::Value Value; |
---|
757 | |
---|
758 | /// Constructor |
---|
759 | ForkMap(M1 &m1, M2 &m2) : _m1(m1), _m2(m2) {} |
---|
760 | /// Returns the value associated with the given key in the first map. |
---|
761 | Value operator[](const Key &k) const { return _m1[k]; } |
---|
762 | /// Sets the value associated with the given key in both maps. |
---|
763 | void set(const Key &k, const Value &v) { _m1.set(k,v); _m2.set(k,v); } |
---|
764 | }; |
---|
765 | |
---|
766 | /// Returns a \ref ForkMap class |
---|
767 | |
---|
768 | /// This function just returns a \ref ForkMap class. |
---|
769 | /// \relates ForkMap |
---|
770 | template <typename M1, typename M2> |
---|
771 | inline ForkMap<M1,M2> forkMap(M1 &m1, M2 &m2) { |
---|
772 | return ForkMap<M1,M2>(m1,m2); |
---|
773 | } |
---|
774 | |
---|
775 | |
---|
776 | /// Sum of two maps |
---|
777 | |
---|
778 | /// This \ref concepts::ReadMap "read-only map" returns the sum |
---|
779 | /// of the values of the two given maps. |
---|
780 | /// Its \c Key and \c Value types are inherited from \c M1. |
---|
781 | /// The \c Key and \c Value of \c M2 must be convertible to those of |
---|
782 | /// \c M1. |
---|
783 | /// |
---|
784 | /// If \c m1 is of type \c M1 and \c m2 is of \c M2, then for |
---|
785 | /// \code |
---|
786 | /// AddMap<M1,M2> am(m1,m2); |
---|
787 | /// \endcode |
---|
788 | /// <tt>am[x]</tt> will be equal to <tt>m1[x]+m2[x]</tt>. |
---|
789 | /// |
---|
790 | /// The simplest way of using this map is through the addMap() |
---|
791 | /// function. |
---|
792 | /// |
---|
793 | /// \sa SubMap, MulMap, DivMap |
---|
794 | /// \sa ShiftMap, ShiftWriteMap |
---|
795 | template<typename M1, typename M2> |
---|
796 | class AddMap : public MapBase<typename M1::Key, typename M1::Value> { |
---|
797 | const M1 &_m1; |
---|
798 | const M2 &_m2; |
---|
799 | public: |
---|
800 | typedef MapBase<typename M1::Key, typename M1::Value> Parent; |
---|
801 | typedef typename Parent::Key Key; |
---|
802 | typedef typename Parent::Value Value; |
---|
803 | |
---|
804 | /// Constructor |
---|
805 | AddMap(const M1 &m1, const M2 &m2) : _m1(m1), _m2(m2) {} |
---|
806 | /// \e |
---|
807 | Value operator[](const Key &k) const { return _m1[k]+_m2[k]; } |
---|
808 | }; |
---|
809 | |
---|
810 | /// Returns an \ref AddMap class |
---|
811 | |
---|
812 | /// This function just returns an \ref AddMap class. |
---|
813 | /// |
---|
814 | /// For example, if \c m1 and \c m2 are both maps with \c double |
---|
815 | /// values, then <tt>addMap(m1,m2)[x]</tt> will be equal to |
---|
816 | /// <tt>m1[x]+m2[x]</tt>. |
---|
817 | /// |
---|
818 | /// \relates AddMap |
---|
819 | template<typename M1, typename M2> |
---|
820 | inline AddMap<M1, M2> addMap(const M1 &m1, const M2 &m2) { |
---|
821 | return AddMap<M1, M2>(m1,m2); |
---|
822 | } |
---|
823 | |
---|
824 | |
---|
825 | /// Difference of two maps |
---|
826 | |
---|
827 | /// This \ref concepts::ReadMap "read-only map" returns the difference |
---|
828 | /// of the values of the two given maps. |
---|
829 | /// Its \c Key and \c Value types are inherited from \c M1. |
---|
830 | /// The \c Key and \c Value of \c M2 must be convertible to those of |
---|
831 | /// \c M1. |
---|
832 | /// |
---|
833 | /// If \c m1 is of type \c M1 and \c m2 is of \c M2, then for |
---|
834 | /// \code |
---|
835 | /// SubMap<M1,M2> sm(m1,m2); |
---|
836 | /// \endcode |
---|
837 | /// <tt>sm[x]</tt> will be equal to <tt>m1[x]-m2[x]</tt>. |
---|
838 | /// |
---|
839 | /// The simplest way of using this map is through the subMap() |
---|
840 | /// function. |
---|
841 | /// |
---|
842 | /// \sa AddMap, MulMap, DivMap |
---|
843 | template<typename M1, typename M2> |
---|
844 | class SubMap : public MapBase<typename M1::Key, typename M1::Value> { |
---|
845 | const M1 &_m1; |
---|
846 | const M2 &_m2; |
---|
847 | public: |
---|
848 | typedef MapBase<typename M1::Key, typename M1::Value> Parent; |
---|
849 | typedef typename Parent::Key Key; |
---|
850 | typedef typename Parent::Value Value; |
---|
851 | |
---|
852 | /// Constructor |
---|
853 | SubMap(const M1 &m1, const M2 &m2) : _m1(m1), _m2(m2) {} |
---|
854 | /// \e |
---|
855 | Value operator[](const Key &k) const { return _m1[k]-_m2[k]; } |
---|
856 | }; |
---|
857 | |
---|
858 | /// Returns a \ref SubMap class |
---|
859 | |
---|
860 | /// This function just returns a \ref SubMap class. |
---|
861 | /// |
---|
862 | /// For example, if \c m1 and \c m2 are both maps with \c double |
---|
863 | /// values, then <tt>subMap(m1,m2)[x]</tt> will be equal to |
---|
864 | /// <tt>m1[x]-m2[x]</tt>. |
---|
865 | /// |
---|
866 | /// \relates SubMap |
---|
867 | template<typename M1, typename M2> |
---|
868 | inline SubMap<M1, M2> subMap(const M1 &m1, const M2 &m2) { |
---|
869 | return SubMap<M1, M2>(m1,m2); |
---|
870 | } |
---|
871 | |
---|
872 | |
---|
873 | /// Product of two maps |
---|
874 | |
---|
875 | /// This \ref concepts::ReadMap "read-only map" returns the product |
---|
876 | /// of the values of the two given maps. |
---|
877 | /// Its \c Key and \c Value types are inherited from \c M1. |
---|
878 | /// The \c Key and \c Value of \c M2 must be convertible to those of |
---|
879 | /// \c M1. |
---|
880 | /// |
---|
881 | /// If \c m1 is of type \c M1 and \c m2 is of \c M2, then for |
---|
882 | /// \code |
---|
883 | /// MulMap<M1,M2> mm(m1,m2); |
---|
884 | /// \endcode |
---|
885 | /// <tt>mm[x]</tt> will be equal to <tt>m1[x]*m2[x]</tt>. |
---|
886 | /// |
---|
887 | /// The simplest way of using this map is through the mulMap() |
---|
888 | /// function. |
---|
889 | /// |
---|
890 | /// \sa AddMap, SubMap, DivMap |
---|
891 | /// \sa ScaleMap, ScaleWriteMap |
---|
892 | template<typename M1, typename M2> |
---|
893 | class MulMap : public MapBase<typename M1::Key, typename M1::Value> { |
---|
894 | const M1 &_m1; |
---|
895 | const M2 &_m2; |
---|
896 | public: |
---|
897 | typedef MapBase<typename M1::Key, typename M1::Value> Parent; |
---|
898 | typedef typename Parent::Key Key; |
---|
899 | typedef typename Parent::Value Value; |
---|
900 | |
---|
901 | /// Constructor |
---|
902 | MulMap(const M1 &m1,const M2 &m2) : _m1(m1), _m2(m2) {} |
---|
903 | /// \e |
---|
904 | Value operator[](const Key &k) const { return _m1[k]*_m2[k]; } |
---|
905 | }; |
---|
906 | |
---|
907 | /// Returns a \ref MulMap class |
---|
908 | |
---|
909 | /// This function just returns a \ref MulMap class. |
---|
910 | /// |
---|
911 | /// For example, if \c m1 and \c m2 are both maps with \c double |
---|
912 | /// values, then <tt>mulMap(m1,m2)[x]</tt> will be equal to |
---|
913 | /// <tt>m1[x]*m2[x]</tt>. |
---|
914 | /// |
---|
915 | /// \relates MulMap |
---|
916 | template<typename M1, typename M2> |
---|
917 | inline MulMap<M1, M2> mulMap(const M1 &m1,const M2 &m2) { |
---|
918 | return MulMap<M1, M2>(m1,m2); |
---|
919 | } |
---|
920 | |
---|
921 | |
---|
922 | /// Quotient of two maps |
---|
923 | |
---|
924 | /// This \ref concepts::ReadMap "read-only map" returns the quotient |
---|
925 | /// of the values of the two given maps. |
---|
926 | /// Its \c Key and \c Value types are inherited from \c M1. |
---|
927 | /// The \c Key and \c Value of \c M2 must be convertible to those of |
---|
928 | /// \c M1. |
---|
929 | /// |
---|
930 | /// If \c m1 is of type \c M1 and \c m2 is of \c M2, then for |
---|
931 | /// \code |
---|
932 | /// DivMap<M1,M2> dm(m1,m2); |
---|
933 | /// \endcode |
---|
934 | /// <tt>dm[x]</tt> will be equal to <tt>m1[x]/m2[x]</tt>. |
---|
935 | /// |
---|
936 | /// The simplest way of using this map is through the divMap() |
---|
937 | /// function. |
---|
938 | /// |
---|
939 | /// \sa AddMap, SubMap, MulMap |
---|
940 | template<typename M1, typename M2> |
---|
941 | class DivMap : public MapBase<typename M1::Key, typename M1::Value> { |
---|
942 | const M1 &_m1; |
---|
943 | const M2 &_m2; |
---|
944 | public: |
---|
945 | typedef MapBase<typename M1::Key, typename M1::Value> Parent; |
---|
946 | typedef typename Parent::Key Key; |
---|
947 | typedef typename Parent::Value Value; |
---|
948 | |
---|
949 | /// Constructor |
---|
950 | DivMap(const M1 &m1,const M2 &m2) : _m1(m1), _m2(m2) {} |
---|
951 | /// \e |
---|
952 | Value operator[](const Key &k) const { return _m1[k]/_m2[k]; } |
---|
953 | }; |
---|
954 | |
---|
955 | /// Returns a \ref DivMap class |
---|
956 | |
---|
957 | /// This function just returns a \ref DivMap class. |
---|
958 | /// |
---|
959 | /// For example, if \c m1 and \c m2 are both maps with \c double |
---|
960 | /// values, then <tt>divMap(m1,m2)[x]</tt> will be equal to |
---|
961 | /// <tt>m1[x]/m2[x]</tt>. |
---|
962 | /// |
---|
963 | /// \relates DivMap |
---|
964 | template<typename M1, typename M2> |
---|
965 | inline DivMap<M1, M2> divMap(const M1 &m1,const M2 &m2) { |
---|
966 | return DivMap<M1, M2>(m1,m2); |
---|
967 | } |
---|
968 | |
---|
969 | |
---|
970 | /// Shifts a map with a constant. |
---|
971 | |
---|
972 | /// This \ref concepts::ReadMap "read-only map" returns the sum of |
---|
973 | /// the given map and a constant value (i.e. it shifts the map with |
---|
974 | /// the constant). Its \c Key and \c Value are inherited from \c M. |
---|
975 | /// |
---|
976 | /// Actually, |
---|
977 | /// \code |
---|
978 | /// ShiftMap<M> sh(m,v); |
---|
979 | /// \endcode |
---|
980 | /// is equivalent to |
---|
981 | /// \code |
---|
982 | /// ConstMap<M::Key, M::Value> cm(v); |
---|
983 | /// AddMap<M, ConstMap<M::Key, M::Value> > sh(m,cm); |
---|
984 | /// \endcode |
---|
985 | /// |
---|
986 | /// The simplest way of using this map is through the shiftMap() |
---|
987 | /// function. |
---|
988 | /// |
---|
989 | /// \sa ShiftWriteMap |
---|
990 | template<typename M, typename C = typename M::Value> |
---|
991 | class ShiftMap : public MapBase<typename M::Key, typename M::Value> { |
---|
992 | const M &_m; |
---|
993 | C _v; |
---|
994 | public: |
---|
995 | typedef MapBase<typename M::Key, typename M::Value> Parent; |
---|
996 | typedef typename Parent::Key Key; |
---|
997 | typedef typename Parent::Value Value; |
---|
998 | |
---|
999 | /// Constructor |
---|
1000 | |
---|
1001 | /// Constructor. |
---|
1002 | /// \param m The undelying map. |
---|
1003 | /// \param v The constant value. |
---|
1004 | ShiftMap(const M &m, const C &v) : _m(m), _v(v) {} |
---|
1005 | /// \e |
---|
1006 | Value operator[](const Key &k) const { return _m[k]+_v; } |
---|
1007 | }; |
---|
1008 | |
---|
1009 | /// Shifts a map with a constant (read-write version). |
---|
1010 | |
---|
1011 | /// This \ref concepts::ReadWriteMap "read-write map" returns the sum |
---|
1012 | /// of the given map and a constant value (i.e. it shifts the map with |
---|
1013 | /// the constant). Its \c Key and \c Value are inherited from \c M. |
---|
1014 | /// It makes also possible to write the map. |
---|
1015 | /// |
---|
1016 | /// The simplest way of using this map is through the shiftWriteMap() |
---|
1017 | /// function. |
---|
1018 | /// |
---|
1019 | /// \sa ShiftMap |
---|
1020 | template<typename M, typename C = typename M::Value> |
---|
1021 | class ShiftWriteMap : public MapBase<typename M::Key, typename M::Value> { |
---|
1022 | M &_m; |
---|
1023 | C _v; |
---|
1024 | public: |
---|
1025 | typedef MapBase<typename M::Key, typename M::Value> Parent; |
---|
1026 | typedef typename Parent::Key Key; |
---|
1027 | typedef typename Parent::Value Value; |
---|
1028 | |
---|
1029 | /// Constructor |
---|
1030 | |
---|
1031 | /// Constructor. |
---|
1032 | /// \param m The undelying map. |
---|
1033 | /// \param v The constant value. |
---|
1034 | ShiftWriteMap(M &m, const C &v) : _m(m), _v(v) {} |
---|
1035 | /// \e |
---|
1036 | Value operator[](const Key &k) const { return _m[k]+_v; } |
---|
1037 | /// \e |
---|
1038 | void set(const Key &k, const Value &v) { _m.set(k, v-_v); } |
---|
1039 | }; |
---|
1040 | |
---|
1041 | /// Returns a \ref ShiftMap class |
---|
1042 | |
---|
1043 | /// This function just returns a \ref ShiftMap class. |
---|
1044 | /// |
---|
1045 | /// For example, if \c m is a map with \c double values and \c v is |
---|
1046 | /// \c double, then <tt>shiftMap(m,v)[x]</tt> will be equal to |
---|
1047 | /// <tt>m[x]+v</tt>. |
---|
1048 | /// |
---|
1049 | /// \relates ShiftMap |
---|
1050 | template<typename M, typename C> |
---|
1051 | inline ShiftMap<M, C> shiftMap(const M &m, const C &v) { |
---|
1052 | return ShiftMap<M, C>(m,v); |
---|
1053 | } |
---|
1054 | |
---|
1055 | /// Returns a \ref ShiftWriteMap class |
---|
1056 | |
---|
1057 | /// This function just returns a \ref ShiftWriteMap class. |
---|
1058 | /// |
---|
1059 | /// For example, if \c m is a map with \c double values and \c v is |
---|
1060 | /// \c double, then <tt>shiftWriteMap(m,v)[x]</tt> will be equal to |
---|
1061 | /// <tt>m[x]+v</tt>. |
---|
1062 | /// Moreover it makes also possible to write the map. |
---|
1063 | /// |
---|
1064 | /// \relates ShiftWriteMap |
---|
1065 | template<typename M, typename C> |
---|
1066 | inline ShiftWriteMap<M, C> shiftWriteMap(M &m, const C &v) { |
---|
1067 | return ShiftWriteMap<M, C>(m,v); |
---|
1068 | } |
---|
1069 | |
---|
1070 | |
---|
1071 | /// Scales a map with a constant. |
---|
1072 | |
---|
1073 | /// This \ref concepts::ReadMap "read-only map" returns the value of |
---|
1074 | /// the given map multiplied from the left side with a constant value. |
---|
1075 | /// Its \c Key and \c Value are inherited from \c M. |
---|
1076 | /// |
---|
1077 | /// Actually, |
---|
1078 | /// \code |
---|
1079 | /// ScaleMap<M> sc(m,v); |
---|
1080 | /// \endcode |
---|
1081 | /// is equivalent to |
---|
1082 | /// \code |
---|
1083 | /// ConstMap<M::Key, M::Value> cm(v); |
---|
1084 | /// MulMap<ConstMap<M::Key, M::Value>, M> sc(cm,m); |
---|
1085 | /// \endcode |
---|
1086 | /// |
---|
1087 | /// The simplest way of using this map is through the scaleMap() |
---|
1088 | /// function. |
---|
1089 | /// |
---|
1090 | /// \sa ScaleWriteMap |
---|
1091 | template<typename M, typename C = typename M::Value> |
---|
1092 | class ScaleMap : public MapBase<typename M::Key, typename M::Value> { |
---|
1093 | const M &_m; |
---|
1094 | C _v; |
---|
1095 | public: |
---|
1096 | typedef MapBase<typename M::Key, typename M::Value> Parent; |
---|
1097 | typedef typename Parent::Key Key; |
---|
1098 | typedef typename Parent::Value Value; |
---|
1099 | |
---|
1100 | /// Constructor |
---|
1101 | |
---|
1102 | /// Constructor. |
---|
1103 | /// \param m The undelying map. |
---|
1104 | /// \param v The constant value. |
---|
1105 | ScaleMap(const M &m, const C &v) : _m(m), _v(v) {} |
---|
1106 | /// \e |
---|
1107 | Value operator[](const Key &k) const { return _v*_m[k]; } |
---|
1108 | }; |
---|
1109 | |
---|
1110 | /// Scales a map with a constant (read-write version). |
---|
1111 | |
---|
1112 | /// This \ref concepts::ReadWriteMap "read-write map" returns the value of |
---|
1113 | /// the given map multiplied from the left side with a constant value. |
---|
1114 | /// Its \c Key and \c Value are inherited from \c M. |
---|
1115 | /// It can also be used as write map if the \c / operator is defined |
---|
1116 | /// between \c Value and \c C and the given multiplier is not zero. |
---|
1117 | /// |
---|
1118 | /// The simplest way of using this map is through the scaleWriteMap() |
---|
1119 | /// function. |
---|
1120 | /// |
---|
1121 | /// \sa ScaleMap |
---|
1122 | template<typename M, typename C = typename M::Value> |
---|
1123 | class ScaleWriteMap : public MapBase<typename M::Key, typename M::Value> { |
---|
1124 | M &_m; |
---|
1125 | C _v; |
---|
1126 | public: |
---|
1127 | typedef MapBase<typename M::Key, typename M::Value> Parent; |
---|
1128 | typedef typename Parent::Key Key; |
---|
1129 | typedef typename Parent::Value Value; |
---|
1130 | |
---|
1131 | /// Constructor |
---|
1132 | |
---|
1133 | /// Constructor. |
---|
1134 | /// \param m The undelying map. |
---|
1135 | /// \param v The constant value. |
---|
1136 | ScaleWriteMap(M &m, const C &v) : _m(m), _v(v) {} |
---|
1137 | /// \e |
---|
1138 | Value operator[](const Key &k) const { return _v*_m[k]; } |
---|
1139 | /// \e |
---|
1140 | void set(const Key &k, const Value &v) { _m.set(k, v/_v); } |
---|
1141 | }; |
---|
1142 | |
---|
1143 | /// Returns a \ref ScaleMap class |
---|
1144 | |
---|
1145 | /// This function just returns a \ref ScaleMap class. |
---|
1146 | /// |
---|
1147 | /// For example, if \c m is a map with \c double values and \c v is |
---|
1148 | /// \c double, then <tt>scaleMap(m,v)[x]</tt> will be equal to |
---|
1149 | /// <tt>v*m[x]</tt>. |
---|
1150 | /// |
---|
1151 | /// \relates ScaleMap |
---|
1152 | template<typename M, typename C> |
---|
1153 | inline ScaleMap<M, C> scaleMap(const M &m, const C &v) { |
---|
1154 | return ScaleMap<M, C>(m,v); |
---|
1155 | } |
---|
1156 | |
---|
1157 | /// Returns a \ref ScaleWriteMap class |
---|
1158 | |
---|
1159 | /// This function just returns a \ref ScaleWriteMap class. |
---|
1160 | /// |
---|
1161 | /// For example, if \c m is a map with \c double values and \c v is |
---|
1162 | /// \c double, then <tt>scaleWriteMap(m,v)[x]</tt> will be equal to |
---|
1163 | /// <tt>v*m[x]</tt>. |
---|
1164 | /// Moreover it makes also possible to write the map. |
---|
1165 | /// |
---|
1166 | /// \relates ScaleWriteMap |
---|
1167 | template<typename M, typename C> |
---|
1168 | inline ScaleWriteMap<M, C> scaleWriteMap(M &m, const C &v) { |
---|
1169 | return ScaleWriteMap<M, C>(m,v); |
---|
1170 | } |
---|
1171 | |
---|
1172 | |
---|
1173 | /// Negative of a map |
---|
1174 | |
---|
1175 | /// This \ref concepts::ReadMap "read-only map" returns the negative |
---|
1176 | /// of the values of the given map (using the unary \c - operator). |
---|
1177 | /// Its \c Key and \c Value are inherited from \c M. |
---|
1178 | /// |
---|
1179 | /// If M::Value is \c int, \c double etc., then |
---|
1180 | /// \code |
---|
1181 | /// NegMap<M> neg(m); |
---|
1182 | /// \endcode |
---|
1183 | /// is equivalent to |
---|
1184 | /// \code |
---|
1185 | /// ScaleMap<M> neg(m,-1); |
---|
1186 | /// \endcode |
---|
1187 | /// |
---|
1188 | /// The simplest way of using this map is through the negMap() |
---|
1189 | /// function. |
---|
1190 | /// |
---|
1191 | /// \sa NegWriteMap |
---|
1192 | template<typename M> |
---|
1193 | class NegMap : public MapBase<typename M::Key, typename M::Value> { |
---|
1194 | const M& _m; |
---|
1195 | public: |
---|
1196 | typedef MapBase<typename M::Key, typename M::Value> Parent; |
---|
1197 | typedef typename Parent::Key Key; |
---|
1198 | typedef typename Parent::Value Value; |
---|
1199 | |
---|
1200 | /// Constructor |
---|
1201 | NegMap(const M &m) : _m(m) {} |
---|
1202 | /// \e |
---|
1203 | Value operator[](const Key &k) const { return -_m[k]; } |
---|
1204 | }; |
---|
1205 | |
---|
1206 | /// Negative of a map (read-write version) |
---|
1207 | |
---|
1208 | /// This \ref concepts::ReadWriteMap "read-write map" returns the |
---|
1209 | /// negative of the values of the given map (using the unary \c - |
---|
1210 | /// operator). |
---|
1211 | /// Its \c Key and \c Value are inherited from \c M. |
---|
1212 | /// It makes also possible to write the map. |
---|
1213 | /// |
---|
1214 | /// If M::Value is \c int, \c double etc., then |
---|
1215 | /// \code |
---|
1216 | /// NegWriteMap<M> neg(m); |
---|
1217 | /// \endcode |
---|
1218 | /// is equivalent to |
---|
1219 | /// \code |
---|
1220 | /// ScaleWriteMap<M> neg(m,-1); |
---|
1221 | /// \endcode |
---|
1222 | /// |
---|
1223 | /// The simplest way of using this map is through the negWriteMap() |
---|
1224 | /// function. |
---|
1225 | /// |
---|
1226 | /// \sa NegMap |
---|
1227 | template<typename M> |
---|
1228 | class NegWriteMap : public MapBase<typename M::Key, typename M::Value> { |
---|
1229 | M &_m; |
---|
1230 | public: |
---|
1231 | typedef MapBase<typename M::Key, typename M::Value> Parent; |
---|
1232 | typedef typename Parent::Key Key; |
---|
1233 | typedef typename Parent::Value Value; |
---|
1234 | |
---|
1235 | /// Constructor |
---|
1236 | NegWriteMap(M &m) : _m(m) {} |
---|
1237 | /// \e |
---|
1238 | Value operator[](const Key &k) const { return -_m[k]; } |
---|
1239 | /// \e |
---|
1240 | void set(const Key &k, const Value &v) { _m.set(k, -v); } |
---|
1241 | }; |
---|
1242 | |
---|
1243 | /// Returns a \ref NegMap class |
---|
1244 | |
---|
1245 | /// This function just returns a \ref NegMap class. |
---|
1246 | /// |
---|
1247 | /// For example, if \c m is a map with \c double values, then |
---|
1248 | /// <tt>negMap(m)[x]</tt> will be equal to <tt>-m[x]</tt>. |
---|
1249 | /// |
---|
1250 | /// \relates NegMap |
---|
1251 | template <typename M> |
---|
1252 | inline NegMap<M> negMap(const M &m) { |
---|
1253 | return NegMap<M>(m); |
---|
1254 | } |
---|
1255 | |
---|
1256 | /// Returns a \ref NegWriteMap class |
---|
1257 | |
---|
1258 | /// This function just returns a \ref NegWriteMap class. |
---|
1259 | /// |
---|
1260 | /// For example, if \c m is a map with \c double values, then |
---|
1261 | /// <tt>negWriteMap(m)[x]</tt> will be equal to <tt>-m[x]</tt>. |
---|
1262 | /// Moreover it makes also possible to write the map. |
---|
1263 | /// |
---|
1264 | /// \relates NegWriteMap |
---|
1265 | template <typename M> |
---|
1266 | inline NegWriteMap<M> negWriteMap(M &m) { |
---|
1267 | return NegWriteMap<M>(m); |
---|
1268 | } |
---|
1269 | |
---|
1270 | |
---|
1271 | /// Absolute value of a map |
---|
1272 | |
---|
1273 | /// This \ref concepts::ReadMap "read-only map" returns the absolute |
---|
1274 | /// value of the values of the given map. |
---|
1275 | /// Its \c Key and \c Value are inherited from \c M. |
---|
1276 | /// \c Value must be comparable to \c 0 and the unary \c - |
---|
1277 | /// operator must be defined for it, of course. |
---|
1278 | /// |
---|
1279 | /// The simplest way of using this map is through the absMap() |
---|
1280 | /// function. |
---|
1281 | template<typename M> |
---|
1282 | class AbsMap : public MapBase<typename M::Key, typename M::Value> { |
---|
1283 | const M &_m; |
---|
1284 | public: |
---|
1285 | typedef MapBase<typename M::Key, typename M::Value> Parent; |
---|
1286 | typedef typename Parent::Key Key; |
---|
1287 | typedef typename Parent::Value Value; |
---|
1288 | |
---|
1289 | /// Constructor |
---|
1290 | AbsMap(const M &m) : _m(m) {} |
---|
1291 | /// \e |
---|
1292 | Value operator[](const Key &k) const { |
---|
1293 | Value tmp = _m[k]; |
---|
1294 | return tmp >= 0 ? tmp : -tmp; |
---|
1295 | } |
---|
1296 | |
---|
1297 | }; |
---|
1298 | |
---|
1299 | /// Returns an \ref AbsMap class |
---|
1300 | |
---|
1301 | /// This function just returns an \ref AbsMap class. |
---|
1302 | /// |
---|
1303 | /// For example, if \c m is a map with \c double values, then |
---|
1304 | /// <tt>absMap(m)[x]</tt> will be equal to <tt>m[x]</tt> if |
---|
1305 | /// it is positive or zero and <tt>-m[x]</tt> if <tt>m[x]</tt> is |
---|
1306 | /// negative. |
---|
1307 | /// |
---|
1308 | /// \relates AbsMap |
---|
1309 | template<typename M> |
---|
1310 | inline AbsMap<M> absMap(const M &m) { |
---|
1311 | return AbsMap<M>(m); |
---|
1312 | } |
---|
1313 | |
---|
1314 | /// @} |
---|
1315 | |
---|
1316 | // Logical maps and map adaptors: |
---|
1317 | |
---|
1318 | /// \addtogroup maps |
---|
1319 | /// @{ |
---|
1320 | |
---|
1321 | /// Constant \c true map. |
---|
1322 | |
---|
1323 | /// This \ref concepts::ReadMap "read-only map" assigns \c true to |
---|
1324 | /// each key. |
---|
1325 | /// |
---|
1326 | /// Note that |
---|
1327 | /// \code |
---|
1328 | /// TrueMap<K> tm; |
---|
1329 | /// \endcode |
---|
1330 | /// is equivalent to |
---|
1331 | /// \code |
---|
1332 | /// ConstMap<K,bool> tm(true); |
---|
1333 | /// \endcode |
---|
1334 | /// |
---|
1335 | /// \sa FalseMap |
---|
1336 | /// \sa ConstMap |
---|
1337 | template <typename K> |
---|
1338 | class TrueMap : public MapBase<K, bool> { |
---|
1339 | public: |
---|
1340 | typedef MapBase<K, bool> Parent; |
---|
1341 | typedef typename Parent::Key Key; |
---|
1342 | typedef typename Parent::Value Value; |
---|
1343 | |
---|
1344 | /// Gives back \c true. |
---|
1345 | Value operator[](const Key&) const { return true; } |
---|
1346 | }; |
---|
1347 | |
---|
1348 | /// Returns a \ref TrueMap class |
---|
1349 | |
---|
1350 | /// This function just returns a \ref TrueMap class. |
---|
1351 | /// \relates TrueMap |
---|
1352 | template<typename K> |
---|
1353 | inline TrueMap<K> trueMap() { |
---|
1354 | return TrueMap<K>(); |
---|
1355 | } |
---|
1356 | |
---|
1357 | |
---|
1358 | /// Constant \c false map. |
---|
1359 | |
---|
1360 | /// This \ref concepts::ReadMap "read-only map" assigns \c false to |
---|
1361 | /// each key. |
---|
1362 | /// |
---|
1363 | /// Note that |
---|
1364 | /// \code |
---|
1365 | /// FalseMap<K> fm; |
---|
1366 | /// \endcode |
---|
1367 | /// is equivalent to |
---|
1368 | /// \code |
---|
1369 | /// ConstMap<K,bool> fm(false); |
---|
1370 | /// \endcode |
---|
1371 | /// |
---|
1372 | /// \sa TrueMap |
---|
1373 | /// \sa ConstMap |
---|
1374 | template <typename K> |
---|
1375 | class FalseMap : public MapBase<K, bool> { |
---|
1376 | public: |
---|
1377 | typedef MapBase<K, bool> Parent; |
---|
1378 | typedef typename Parent::Key Key; |
---|
1379 | typedef typename Parent::Value Value; |
---|
1380 | |
---|
1381 | /// Gives back \c false. |
---|
1382 | Value operator[](const Key&) const { return false; } |
---|
1383 | }; |
---|
1384 | |
---|
1385 | /// Returns a \ref FalseMap class |
---|
1386 | |
---|
1387 | /// This function just returns a \ref FalseMap class. |
---|
1388 | /// \relates FalseMap |
---|
1389 | template<typename K> |
---|
1390 | inline FalseMap<K> falseMap() { |
---|
1391 | return FalseMap<K>(); |
---|
1392 | } |
---|
1393 | |
---|
1394 | /// @} |
---|
1395 | |
---|
1396 | /// \addtogroup map_adaptors |
---|
1397 | /// @{ |
---|
1398 | |
---|
1399 | /// Logical 'and' of two maps |
---|
1400 | |
---|
1401 | /// This \ref concepts::ReadMap "read-only map" returns the logical |
---|
1402 | /// 'and' of the values of the two given maps. |
---|
1403 | /// Its \c Key type is inherited from \c M1 and its \c Value type is |
---|
1404 | /// \c bool. \c M2::Key must be convertible to \c M1::Key. |
---|
1405 | /// |
---|
1406 | /// If \c m1 is of type \c M1 and \c m2 is of \c M2, then for |
---|
1407 | /// \code |
---|
1408 | /// AndMap<M1,M2> am(m1,m2); |
---|
1409 | /// \endcode |
---|
1410 | /// <tt>am[x]</tt> will be equal to <tt>m1[x]&&m2[x]</tt>. |
---|
1411 | /// |
---|
1412 | /// The simplest way of using this map is through the andMap() |
---|
1413 | /// function. |
---|
1414 | /// |
---|
1415 | /// \sa OrMap |
---|
1416 | /// \sa NotMap, NotWriteMap |
---|
1417 | template<typename M1, typename M2> |
---|
1418 | class AndMap : public MapBase<typename M1::Key, bool> { |
---|
1419 | const M1 &_m1; |
---|
1420 | const M2 &_m2; |
---|
1421 | public: |
---|
1422 | typedef MapBase<typename M1::Key, bool> Parent; |
---|
1423 | typedef typename Parent::Key Key; |
---|
1424 | typedef typename Parent::Value Value; |
---|
1425 | |
---|
1426 | /// Constructor |
---|
1427 | AndMap(const M1 &m1, const M2 &m2) : _m1(m1), _m2(m2) {} |
---|
1428 | /// \e |
---|
1429 | Value operator[](const Key &k) const { return _m1[k]&&_m2[k]; } |
---|
1430 | }; |
---|
1431 | |
---|
1432 | /// Returns an \ref AndMap class |
---|
1433 | |
---|
1434 | /// This function just returns an \ref AndMap class. |
---|
1435 | /// |
---|
1436 | /// For example, if \c m1 and \c m2 are both maps with \c bool values, |
---|
1437 | /// then <tt>andMap(m1,m2)[x]</tt> will be equal to |
---|
1438 | /// <tt>m1[x]&&m2[x]</tt>. |
---|
1439 | /// |
---|
1440 | /// \relates AndMap |
---|
1441 | template<typename M1, typename M2> |
---|
1442 | inline AndMap<M1, M2> andMap(const M1 &m1, const M2 &m2) { |
---|
1443 | return AndMap<M1, M2>(m1,m2); |
---|
1444 | } |
---|
1445 | |
---|
1446 | |
---|
1447 | /// Logical 'or' of two maps |
---|
1448 | |
---|
1449 | /// This \ref concepts::ReadMap "read-only map" returns the logical |
---|
1450 | /// 'or' of the values of the two given maps. |
---|
1451 | /// Its \c Key type is inherited from \c M1 and its \c Value type is |
---|
1452 | /// \c bool. \c M2::Key must be convertible to \c M1::Key. |
---|
1453 | /// |
---|
1454 | /// If \c m1 is of type \c M1 and \c m2 is of \c M2, then for |
---|
1455 | /// \code |
---|
1456 | /// OrMap<M1,M2> om(m1,m2); |
---|
1457 | /// \endcode |
---|
1458 | /// <tt>om[x]</tt> will be equal to <tt>m1[x]||m2[x]</tt>. |
---|
1459 | /// |
---|
1460 | /// The simplest way of using this map is through the orMap() |
---|
1461 | /// function. |
---|
1462 | /// |
---|
1463 | /// \sa AndMap |
---|
1464 | /// \sa NotMap, NotWriteMap |
---|
1465 | template<typename M1, typename M2> |
---|
1466 | class OrMap : public MapBase<typename M1::Key, bool> { |
---|
1467 | const M1 &_m1; |
---|
1468 | const M2 &_m2; |
---|
1469 | public: |
---|
1470 | typedef MapBase<typename M1::Key, bool> Parent; |
---|
1471 | typedef typename Parent::Key Key; |
---|
1472 | typedef typename Parent::Value Value; |
---|
1473 | |
---|
1474 | /// Constructor |
---|
1475 | OrMap(const M1 &m1, const M2 &m2) : _m1(m1), _m2(m2) {} |
---|
1476 | /// \e |
---|
1477 | Value operator[](const Key &k) const { return _m1[k]||_m2[k]; } |
---|
1478 | }; |
---|
1479 | |
---|
1480 | /// Returns an \ref OrMap class |
---|
1481 | |
---|
1482 | /// This function just returns an \ref OrMap class. |
---|
1483 | /// |
---|
1484 | /// For example, if \c m1 and \c m2 are both maps with \c bool values, |
---|
1485 | /// then <tt>orMap(m1,m2)[x]</tt> will be equal to |
---|
1486 | /// <tt>m1[x]||m2[x]</tt>. |
---|
1487 | /// |
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1488 | /// \relates OrMap |
---|
1489 | template<typename M1, typename M2> |
---|
1490 | inline OrMap<M1, M2> orMap(const M1 &m1, const M2 &m2) { |
---|
1491 | return OrMap<M1, M2>(m1,m2); |
---|
1492 | } |
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1493 | |
---|
1494 | |
---|
1495 | /// Logical 'not' of a map |
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1496 | |
---|
1497 | /// This \ref concepts::ReadMap "read-only map" returns the logical |
---|
1498 | /// negation of the values of the given map. |
---|
1499 | /// Its \c Key is inherited from \c M and its \c Value is \c bool. |
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1500 | /// |
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1501 | /// The simplest way of using this map is through the notMap() |
---|
1502 | /// function. |
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1503 | /// |
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1504 | /// \sa NotWriteMap |
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1505 | template <typename M> |
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1506 | class NotMap : public MapBase<typename M::Key, bool> { |
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1507 | const M &_m; |
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1508 | public: |
---|
1509 | typedef MapBase<typename M::Key, bool> Parent; |
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1510 | typedef typename Parent::Key Key; |
---|
1511 | typedef typename Parent::Value Value; |
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1512 | |
---|
1513 | /// Constructor |
---|
1514 | NotMap(const M &m) : _m(m) {} |
---|
1515 | /// \e |
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1516 | Value operator[](const Key &k) const { return !_m[k]; } |
---|
1517 | }; |
---|
1518 | |
---|
1519 | /// Logical 'not' of a map (read-write version) |
---|
1520 | |
---|
1521 | /// This \ref concepts::ReadWriteMap "read-write map" returns the |
---|
1522 | /// logical negation of the values of the given map. |
---|
1523 | /// Its \c Key is inherited from \c M and its \c Value is \c bool. |
---|
1524 | /// It makes also possible to write the map. When a value is set, |
---|
1525 | /// the opposite value is set to the original map. |
---|
1526 | /// |
---|
1527 | /// The simplest way of using this map is through the notWriteMap() |
---|
1528 | /// function. |
---|
1529 | /// |
---|
1530 | /// \sa NotMap |
---|
1531 | template <typename M> |
---|
1532 | class NotWriteMap : public MapBase<typename M::Key, bool> { |
---|
1533 | M &_m; |
---|
1534 | public: |
---|
1535 | typedef MapBase<typename M::Key, bool> Parent; |
---|
1536 | typedef typename Parent::Key Key; |
---|
1537 | typedef typename Parent::Value Value; |
---|
1538 | |
---|
1539 | /// Constructor |
---|
1540 | NotWriteMap(M &m) : _m(m) {} |
---|
1541 | /// \e |
---|
1542 | Value operator[](const Key &k) const { return !_m[k]; } |
---|
1543 | /// \e |
---|
1544 | void set(const Key &k, bool v) { _m.set(k, !v); } |
---|
1545 | }; |
---|
1546 | |
---|
1547 | /// Returns a \ref NotMap class |
---|
1548 | |
---|
1549 | /// This function just returns a \ref NotMap class. |
---|
1550 | /// |
---|
1551 | /// For example, if \c m is a map with \c bool values, then |
---|
1552 | /// <tt>notMap(m)[x]</tt> will be equal to <tt>!m[x]</tt>. |
---|
1553 | /// |
---|
1554 | /// \relates NotMap |
---|
1555 | template <typename M> |
---|
1556 | inline NotMap<M> notMap(const M &m) { |
---|
1557 | return NotMap<M>(m); |
---|
1558 | } |
---|
1559 | |
---|
1560 | /// Returns a \ref NotWriteMap class |
---|
1561 | |
---|
1562 | /// This function just returns a \ref NotWriteMap class. |
---|
1563 | /// |
---|
1564 | /// For example, if \c m is a map with \c bool values, then |
---|
1565 | /// <tt>notWriteMap(m)[x]</tt> will be equal to <tt>!m[x]</tt>. |
---|
1566 | /// Moreover it makes also possible to write the map. |
---|
1567 | /// |
---|
1568 | /// \relates NotWriteMap |
---|
1569 | template <typename M> |
---|
1570 | inline NotWriteMap<M> notWriteMap(M &m) { |
---|
1571 | return NotWriteMap<M>(m); |
---|
1572 | } |
---|
1573 | |
---|
1574 | |
---|
1575 | /// Combination of two maps using the \c == operator |
---|
1576 | |
---|
1577 | /// This \ref concepts::ReadMap "read-only map" assigns \c true to |
---|
1578 | /// the keys for which the corresponding values of the two maps are |
---|
1579 | /// equal. |
---|
1580 | /// Its \c Key type is inherited from \c M1 and its \c Value type is |
---|
1581 | /// \c bool. \c M2::Key must be convertible to \c M1::Key. |
---|
1582 | /// |
---|
1583 | /// If \c m1 is of type \c M1 and \c m2 is of \c M2, then for |
---|
1584 | /// \code |
---|
1585 | /// EqualMap<M1,M2> em(m1,m2); |
---|
1586 | /// \endcode |
---|
1587 | /// <tt>em[x]</tt> will be equal to <tt>m1[x]==m2[x]</tt>. |
---|
1588 | /// |
---|
1589 | /// The simplest way of using this map is through the equalMap() |
---|
1590 | /// function. |
---|
1591 | /// |
---|
1592 | /// \sa LessMap |
---|
1593 | template<typename M1, typename M2> |
---|
1594 | class EqualMap : public MapBase<typename M1::Key, bool> { |
---|
1595 | const M1 &_m1; |
---|
1596 | const M2 &_m2; |
---|
1597 | public: |
---|
1598 | typedef MapBase<typename M1::Key, bool> Parent; |
---|
1599 | typedef typename Parent::Key Key; |
---|
1600 | typedef typename Parent::Value Value; |
---|
1601 | |
---|
1602 | /// Constructor |
---|
1603 | EqualMap(const M1 &m1, const M2 &m2) : _m1(m1), _m2(m2) {} |
---|
1604 | /// \e |
---|
1605 | Value operator[](const Key &k) const { return _m1[k]==_m2[k]; } |
---|
1606 | }; |
---|
1607 | |
---|
1608 | /// Returns an \ref EqualMap class |
---|
1609 | |
---|
1610 | /// This function just returns an \ref EqualMap class. |
---|
1611 | /// |
---|
1612 | /// For example, if \c m1 and \c m2 are maps with keys and values of |
---|
1613 | /// the same type, then <tt>equalMap(m1,m2)[x]</tt> will be equal to |
---|
1614 | /// <tt>m1[x]==m2[x]</tt>. |
---|
1615 | /// |
---|
1616 | /// \relates EqualMap |
---|
1617 | template<typename M1, typename M2> |
---|
1618 | inline EqualMap<M1, M2> equalMap(const M1 &m1, const M2 &m2) { |
---|
1619 | return EqualMap<M1, M2>(m1,m2); |
---|
1620 | } |
---|
1621 | |
---|
1622 | |
---|
1623 | /// Combination of two maps using the \c < operator |
---|
1624 | |
---|
1625 | /// This \ref concepts::ReadMap "read-only map" assigns \c true to |
---|
1626 | /// the keys for which the corresponding value of the first map is |
---|
1627 | /// less then the value of the second map. |
---|
1628 | /// Its \c Key type is inherited from \c M1 and its \c Value type is |
---|
1629 | /// \c bool. \c M2::Key must be convertible to \c M1::Key. |
---|
1630 | /// |
---|
1631 | /// If \c m1 is of type \c M1 and \c m2 is of \c M2, then for |
---|
1632 | /// \code |
---|
1633 | /// LessMap<M1,M2> lm(m1,m2); |
---|
1634 | /// \endcode |
---|
1635 | /// <tt>lm[x]</tt> will be equal to <tt>m1[x]<m2[x]</tt>. |
---|
1636 | /// |
---|
1637 | /// The simplest way of using this map is through the lessMap() |
---|
1638 | /// function. |
---|
1639 | /// |
---|
1640 | /// \sa EqualMap |
---|
1641 | template<typename M1, typename M2> |
---|
1642 | class LessMap : public MapBase<typename M1::Key, bool> { |
---|
1643 | const M1 &_m1; |
---|
1644 | const M2 &_m2; |
---|
1645 | public: |
---|
1646 | typedef MapBase<typename M1::Key, bool> Parent; |
---|
1647 | typedef typename Parent::Key Key; |
---|
1648 | typedef typename Parent::Value Value; |
---|
1649 | |
---|
1650 | /// Constructor |
---|
1651 | LessMap(const M1 &m1, const M2 &m2) : _m1(m1), _m2(m2) {} |
---|
1652 | /// \e |
---|
1653 | Value operator[](const Key &k) const { return _m1[k]<_m2[k]; } |
---|
1654 | }; |
---|
1655 | |
---|
1656 | /// Returns an \ref LessMap class |
---|
1657 | |
---|
1658 | /// This function just returns an \ref LessMap class. |
---|
1659 | /// |
---|
1660 | /// For example, if \c m1 and \c m2 are maps with keys and values of |
---|
1661 | /// the same type, then <tt>lessMap(m1,m2)[x]</tt> will be equal to |
---|
1662 | /// <tt>m1[x]<m2[x]</tt>. |
---|
1663 | /// |
---|
1664 | /// \relates LessMap |
---|
1665 | template<typename M1, typename M2> |
---|
1666 | inline LessMap<M1, M2> lessMap(const M1 &m1, const M2 &m2) { |
---|
1667 | return LessMap<M1, M2>(m1,m2); |
---|
1668 | } |
---|
1669 | |
---|
1670 | /// @} |
---|
1671 | } |
---|
1672 | |
---|
1673 | #endif // LEMON_MAPS_H |
---|