1 | /* -*- C++ -*- |
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2 | * src/lemon/maps.h - Part of LEMON, a generic C++ optimization library |
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3 | * |
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4 | * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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5 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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6 | * |
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7 | * Permission to use, modify and distribute this software is granted |
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8 | * provided that this copyright notice appears in all copies. For |
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9 | * precise terms see the accompanying LICENSE file. |
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10 | * |
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11 | * This software is provided "AS IS" with no warranty of any kind, |
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12 | * express or implied, and with no claim as to its suitability for any |
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13 | * purpose. |
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14 | * |
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15 | */ |
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16 | |
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17 | #ifndef LEMON_MAPS_H |
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18 | #define LEMON_MAPS_H |
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19 | |
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20 | #include<math.h> |
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21 | |
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22 | ///\file |
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23 | ///\ingroup maps |
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24 | ///\brief Miscellaneous property maps |
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25 | /// |
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26 | ///\todo This file has the same name as the concept file in concept/, |
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27 | /// and this is not easily detectable in docs... |
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28 | |
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29 | #include <map> |
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30 | |
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31 | namespace lemon { |
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32 | |
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33 | /// \addtogroup maps |
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34 | /// @{ |
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35 | |
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36 | /// Base class of maps. |
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37 | |
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38 | /// Base class of maps. |
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39 | /// It provides the necessary <tt>typedef</tt>s required by the map concept. |
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40 | template<typename K, typename T> |
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41 | class MapBase |
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42 | { |
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43 | public: |
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44 | ///\e |
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45 | typedef K Key; |
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46 | ///\e |
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47 | typedef T Value; |
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48 | }; |
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49 | |
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50 | /// Null map. (a.k.a. DoNothingMap) |
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51 | |
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52 | /// If you have to provide a map only for its type definitions, |
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53 | /// or if you have to provide a writable map, but |
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54 | /// data written to it will sent to <tt>/dev/null</tt>... |
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55 | template<typename K, typename T> |
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56 | class NullMap : public MapBase<K,T> |
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57 | { |
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58 | public: |
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59 | |
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60 | /// Gives back a default constructed element. |
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61 | T operator[](const K&) const { return T(); } |
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62 | /// Absorbs the value. |
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63 | void set(const K&, const T&) {} |
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64 | }; |
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65 | |
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66 | |
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67 | /// Constant map. |
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68 | |
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69 | /// This is a readable map which assigns a specified value to each key. |
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70 | /// In other aspects it is equivalent to the \ref NullMap. |
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71 | /// \todo set could be used to set the value. |
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72 | template<typename K, typename T> |
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73 | class ConstMap : public MapBase<K,T> |
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74 | { |
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75 | T v; |
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76 | public: |
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77 | |
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78 | /// Default constructor |
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79 | |
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80 | /// The value of the map will be uninitialized. |
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81 | /// (More exactly it will be default constructed.) |
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82 | ConstMap() {} |
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83 | ///\e |
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84 | |
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85 | /// \param _v The initial value of the map. |
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86 | /// |
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87 | ConstMap(const T &_v) : v(_v) {} |
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88 | |
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89 | T operator[](const K&) const { return v; } |
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90 | void set(const K&, const T&) {} |
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91 | |
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92 | template<typename T1> |
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93 | struct rebind { |
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94 | typedef ConstMap<K,T1> other; |
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95 | }; |
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96 | |
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97 | template<typename T1> |
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98 | ConstMap(const ConstMap<K,T1> &, const T &_v) : v(_v) {} |
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99 | }; |
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100 | |
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101 | ///Returns a \ref ConstMap class |
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102 | |
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103 | ///This function just returns a \ref ConstMap class. |
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104 | ///\relates ConstMap |
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105 | template<class V,class K> |
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106 | inline ConstMap<V,K> constMap(const K &k) |
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107 | { |
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108 | return ConstMap<V,K>(k); |
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109 | } |
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110 | |
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111 | |
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112 | //to document later |
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113 | template<typename T, T v> |
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114 | struct Const { }; |
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115 | //to document later |
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116 | template<typename K, typename V, V v> |
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117 | class ConstMap<K, Const<V, v> > : public MapBase<K, V> |
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118 | { |
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119 | public: |
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120 | ConstMap() { } |
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121 | V operator[](const K&) const { return v; } |
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122 | void set(const K&, const V&) { } |
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123 | }; |
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124 | |
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125 | /// \c std::map wrapper |
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126 | |
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127 | /// This is essentially a wrapper for \c std::map. With addition that |
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128 | /// you can specify a default value different from \c Value() . |
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129 | /// |
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130 | /// \todo Provide allocator parameter... |
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131 | template <typename K, typename T, typename Compare = std::less<K> > |
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132 | class StdMap : public std::map<K,T,Compare> { |
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133 | typedef std::map<K,T,Compare> parent; |
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134 | T v; |
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135 | typedef typename parent::value_type PairType; |
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136 | |
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137 | public: |
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138 | typedef K Key; |
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139 | typedef T Value; |
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140 | typedef T& Reference; |
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141 | typedef const T& ConstReference; |
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142 | |
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143 | |
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144 | StdMap() : v() {} |
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145 | /// Constructor with specified default value |
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146 | StdMap(const T& _v) : v(_v) {} |
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147 | |
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148 | /// \brief Constructs the map from an appropriate std::map. |
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149 | /// |
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150 | /// \warning Inefficient: copies the content of \c m ! |
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151 | StdMap(const parent &m) : parent(m) {} |
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152 | /// \brief Constructs the map from an appropriate std::map, and explicitly |
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153 | /// specifies a default value. |
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154 | /// |
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155 | /// \warning Inefficient: copies the content of \c m ! |
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156 | StdMap(const parent &m, const T& _v) : parent(m), v(_v) {} |
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157 | |
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158 | template<typename T1, typename Comp1> |
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159 | StdMap(const StdMap<Key,T1,Comp1> &m, const T &_v) { |
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160 | //FIXME; |
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161 | } |
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162 | |
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163 | Reference operator[](const Key &k) { |
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164 | return insert(PairType(k,v)).first -> second; |
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165 | } |
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166 | ConstReference operator[](const Key &k) const { |
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167 | typename parent::iterator i = lower_bound(k); |
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168 | if (i == parent::end() || parent::key_comp()(k, (*i).first)) |
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169 | return v; |
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170 | return (*i).second; |
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171 | } |
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172 | void set(const Key &k, const T &t) { |
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173 | parent::operator[](k) = t; |
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174 | } |
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175 | |
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176 | /// Changes the default value of the map. |
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177 | /// \return Returns the previous default value. |
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178 | /// |
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179 | /// \warning The value of some keys (which has already been queried, but |
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180 | /// the value has been unchanged from the default) may change! |
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181 | T setDefault(const T &_v) { T old=v; v=_v; return old; } |
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182 | |
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183 | template<typename T1> |
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184 | struct rebind { |
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185 | typedef StdMap<Key,T1,Compare> other; |
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186 | }; |
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187 | }; |
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188 | |
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189 | ///Convert the \c Value of a maps to another type. |
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190 | |
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191 | ///This \ref concept::ReadMap "read only map" |
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192 | ///converts the \c Value of a maps to type \c T. |
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193 | ///Its \c Value is inherited from \c M. |
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194 | /// |
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195 | ///Actually, |
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196 | ///\code |
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197 | /// ConvertMap<X> sh(x,v); |
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198 | ///\endcode |
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199 | ///it is equivalent with |
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200 | ///\code |
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201 | /// ConstMap<X::Key, X::Value> c_tmp(v); |
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202 | /// AddMap<X, ConstMap<X::Key, X::Value> > sh(x,v); |
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203 | ///\endcode |
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204 | ///\bug wrong documentation |
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205 | template<class M, class T> |
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206 | class ConvertMap |
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207 | { |
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208 | const M &m; |
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209 | public: |
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210 | typedef typename M::Key Key; |
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211 | typedef T Value; |
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212 | |
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213 | ///Constructor |
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214 | |
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215 | ///Constructor |
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216 | ///\param _m is the undelying map |
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217 | ///\param _v is the convert value |
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218 | ConvertMap(const M &_m) : m(_m) {}; |
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219 | |
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220 | /// \brief The subscript operator. |
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221 | /// |
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222 | /// The subscript operator. |
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223 | /// \param edge The edge |
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224 | /// \return The target of the edge |
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225 | Value operator[](Key k) const {return m[k];} |
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226 | }; |
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227 | |
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228 | ///Returns an \ref ConvertMap class |
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229 | |
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230 | ///This function just returns an \ref ConvertMap class. |
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231 | ///\relates ConvertMap |
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232 | ///\todo The order of the template parameters are changed. |
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233 | template<class T, class M> |
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234 | inline ConvertMap<M,T> convertMap(const M &m) |
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235 | { |
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236 | return ConvertMap<M,T>(m); |
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237 | } |
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238 | |
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239 | /// \brief Returns the source of the given edge. |
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240 | /// |
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241 | /// The SourceMap gives back the source Node of the given edge. |
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242 | /// \author Balazs Dezso |
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243 | template <typename Graph> |
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244 | class SourceMap { |
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245 | public: |
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246 | typedef typename Graph::Node Value; |
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247 | typedef typename Graph::Edge Key; |
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248 | |
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249 | /// \brief Constructor |
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250 | /// |
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251 | /// Constructor |
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252 | /// \param _graph The graph that the map belongs to. |
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253 | SourceMap(const Graph& _graph) : graph(_graph) {} |
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254 | |
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255 | /// \brief The subscript operator. |
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256 | /// |
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257 | /// The subscript operator. |
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258 | /// \param edge The edge |
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259 | /// \return The source of the edge |
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260 | Value operator[](const Key& edge) { |
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261 | return graph.source(edge); |
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262 | } |
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263 | |
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264 | private: |
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265 | const Graph& graph; |
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266 | }; |
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267 | |
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268 | /// \brief Returns a \ref SourceMap class |
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269 | |
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270 | /// This function just returns an \ref SourceMap class. |
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271 | /// \relates SourceMap |
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272 | template <typename Graph> |
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273 | inline SourceMap<Graph> sourceMap(const Graph& graph) { |
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274 | return SourceMap<Graph>(graph); |
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275 | } |
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276 | |
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277 | /// \brief Returns the target of the given edge. |
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278 | /// |
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279 | /// The TargetMap gives back the target Node of the given edge. |
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280 | /// \author Balazs Dezso |
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281 | template <typename Graph> |
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282 | class TargetMap { |
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283 | public: |
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284 | typedef typename Graph::Node Value; |
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285 | typedef typename Graph::Edge Key; |
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286 | |
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287 | /// \brief Constructor |
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288 | /// |
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289 | /// Constructor |
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290 | /// \param _graph The graph that the map belongs to. |
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291 | TargetMap(const Graph& _graph) : graph(_graph) {} |
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292 | |
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293 | /// \brief The subscript operator. |
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294 | /// |
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295 | /// The subscript operator. |
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296 | /// \param edge The edge |
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297 | /// \return The target of the edge |
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298 | Value operator[](const Key& key) { |
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299 | return graph.target(key); |
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300 | } |
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301 | |
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302 | private: |
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303 | const Graph& graph; |
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304 | }; |
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305 | |
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306 | /// \brief Returns a \ref TargetMap class |
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307 | |
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308 | /// This function just returns an \ref TargetMap class. |
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309 | /// \relates TargetMap |
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310 | template <typename Graph> |
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311 | inline TargetMap<Graph> targetMap(const Graph& graph) { |
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312 | return TargetMap<Graph>(graph); |
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313 | } |
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314 | |
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315 | ///Sum of two maps |
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316 | |
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317 | ///This \ref concept::ReadMap "read only map" returns the sum of the two |
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318 | ///given maps. Its \c Key and \c Value will be inherited from \c M1. |
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319 | ///The \c Key and \c Value of M2 must be convertible to those of \c M1. |
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320 | |
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321 | template<class M1,class M2> |
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322 | class AddMap |
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323 | { |
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324 | const M1 &m1; |
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325 | const M2 &m2; |
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326 | public: |
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327 | typedef typename M1::Key Key; |
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328 | typedef typename M1::Value Value; |
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329 | |
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330 | ///Constructor |
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331 | |
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332 | ///\e |
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333 | /// |
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334 | AddMap(const M1 &_m1,const M2 &_m2) : m1(_m1), m2(_m2) {}; |
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335 | Value operator[](Key k) const {return m1[k]+m2[k];} |
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336 | }; |
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337 | |
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338 | ///Returns an \ref AddMap class |
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339 | |
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340 | ///This function just returns an \ref AddMap class. |
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341 | ///\todo How to call these type of functions? |
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342 | /// |
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343 | ///\relates AddMap |
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344 | ///\todo Wrong scope in Doxygen when \c \\relates is used |
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345 | template<class M1,class M2> |
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346 | inline AddMap<M1,M2> addMap(const M1 &m1,const M2 &m2) |
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347 | { |
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348 | return AddMap<M1,M2>(m1,m2); |
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349 | } |
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350 | |
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351 | ///Shift a maps with a constant. |
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352 | |
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353 | ///This \ref concept::ReadMap "read only map" returns the sum of the |
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354 | ///given map and a constant value. |
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355 | ///Its \c Key and \c Value is inherited from \c M. |
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356 | /// |
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357 | ///Actually, |
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358 | ///\code |
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359 | /// ShiftMap<X> sh(x,v); |
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360 | ///\endcode |
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361 | ///it is equivalent with |
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362 | ///\code |
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363 | /// ConstMap<X::Key, X::Value> c_tmp(v); |
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364 | /// AddMap<X, ConstMap<X::Key, X::Value> > sh(x,v); |
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365 | ///\endcode |
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366 | template<class M> |
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367 | class ShiftMap |
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368 | { |
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369 | const M &m; |
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370 | typename M::Value v; |
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371 | public: |
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372 | typedef typename M::Key Key; |
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373 | typedef typename M::Value Value; |
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374 | |
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375 | ///Constructor |
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376 | |
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377 | ///Constructor |
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378 | ///\param _m is the undelying map |
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379 | ///\param _v is the shift value |
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380 | ShiftMap(const M &_m,const Value &_v ) : m(_m), v(_v) {}; |
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381 | Value operator[](Key k) const {return m[k]+v;} |
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382 | }; |
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383 | |
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384 | ///Returns an \ref ShiftMap class |
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385 | |
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386 | ///This function just returns an \ref ShiftMap class. |
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387 | ///\relates ShiftMap |
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388 | ///\todo A better name is required. |
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389 | template<class M> |
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390 | inline ShiftMap<M> shiftMap(const M &m,const typename M::Value &v) |
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391 | { |
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392 | return ShiftMap<M>(m,v); |
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393 | } |
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394 | |
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395 | ///Difference of two maps |
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396 | |
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397 | ///This \ref concept::ReadMap "read only map" returns the difference |
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398 | ///of the values returned by the two |
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399 | ///given maps. Its \c Key and \c Value will be inherited from \c M1. |
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400 | ///The \c Key and \c Value of \c M2 must be convertible to those of \c M1. |
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401 | |
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402 | template<class M1,class M2> |
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403 | class SubMap |
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404 | { |
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405 | const M1 &m1; |
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406 | const M2 &m2; |
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407 | public: |
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408 | typedef typename M1::Key Key; |
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409 | typedef typename M1::Value Value; |
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410 | |
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411 | ///Constructor |
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412 | |
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413 | ///\e |
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414 | /// |
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415 | SubMap(const M1 &_m1,const M2 &_m2) : m1(_m1), m2(_m2) {}; |
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416 | Value operator[](Key k) const {return m1[k]-m2[k];} |
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417 | }; |
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418 | |
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419 | ///Returns a \ref SubMap class |
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420 | |
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421 | ///This function just returns a \ref SubMap class. |
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422 | /// |
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423 | ///\relates SubMap |
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424 | template<class M1,class M2> |
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425 | inline SubMap<M1,M2> subMap(const M1 &m1,const M2 &m2) |
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426 | { |
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427 | return SubMap<M1,M2>(m1,m2); |
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428 | } |
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429 | |
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430 | ///Product of two maps |
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431 | |
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432 | ///This \ref concept::ReadMap "read only map" returns the product of the |
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433 | ///values returned by the two |
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434 | ///given |
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435 | ///maps. Its \c Key and \c Value will be inherited from \c M1. |
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436 | ///The \c Key and \c Value of \c M2 must be convertible to those of \c M1. |
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437 | |
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438 | template<class M1,class M2> |
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439 | class MulMap |
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440 | { |
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441 | const M1 &m1; |
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442 | const M2 &m2; |
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443 | public: |
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444 | typedef typename M1::Key Key; |
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445 | typedef typename M1::Value Value; |
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446 | |
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447 | ///Constructor |
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448 | |
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449 | ///\e |
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450 | /// |
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451 | MulMap(const M1 &_m1,const M2 &_m2) : m1(_m1), m2(_m2) {}; |
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452 | Value operator[](Key k) const {return m1[k]*m2[k];} |
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453 | }; |
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454 | |
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455 | ///Returns a \ref MulMap class |
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456 | |
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457 | ///This function just returns a \ref MulMap class. |
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458 | ///\relates MulMap |
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459 | template<class M1,class M2> |
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460 | inline MulMap<M1,M2> mulMap(const M1 &m1,const M2 &m2) |
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461 | { |
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462 | return MulMap<M1,M2>(m1,m2); |
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463 | } |
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464 | |
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465 | ///Scale a maps with a constant. |
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466 | |
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467 | ///This \ref concept::ReadMap "read only map" returns the value of the |
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468 | ///given map multipied with a constant value. |
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469 | ///Its \c Key and \c Value is inherited from \c M. |
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470 | /// |
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471 | ///Actually, |
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472 | ///\code |
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473 | /// ScaleMap<X> sc(x,v); |
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474 | ///\endcode |
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475 | ///it is equivalent with |
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476 | ///\code |
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477 | /// ConstMap<X::Key, X::Value> c_tmp(v); |
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478 | /// MulMap<X, ConstMap<X::Key, X::Value> > sc(x,v); |
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479 | ///\endcode |
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480 | template<class M> |
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481 | class ScaleMap |
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482 | { |
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483 | const M &m; |
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484 | typename M::Value v; |
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485 | public: |
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486 | typedef typename M::Key Key; |
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487 | typedef typename M::Value Value; |
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488 | |
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489 | ///Constructor |
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490 | |
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491 | ///Constructor |
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492 | ///\param _m is the undelying map |
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493 | ///\param _v is the scaling value |
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494 | ScaleMap(const M &_m,const Value &_v ) : m(_m), v(_v) {}; |
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495 | Value operator[](Key k) const {return m[k]*v;} |
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496 | }; |
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497 | |
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498 | ///Returns an \ref ScaleMap class |
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499 | |
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500 | ///This function just returns an \ref ScaleMap class. |
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501 | ///\relates ScaleMap |
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502 | ///\todo A better name is required. |
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503 | template<class M> |
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504 | inline ScaleMap<M> scaleMap(const M &m,const typename M::Value &v) |
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505 | { |
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506 | return ScaleMap<M>(m,v); |
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507 | } |
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508 | |
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509 | ///Quotient of two maps |
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510 | |
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511 | ///This \ref concept::ReadMap "read only map" returns the quotient of the |
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512 | ///values returned by the two |
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513 | ///given maps. Its \c Key and \c Value will be inherited from \c M1. |
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514 | ///The \c Key and \c Value of \c M2 must be convertible to those of \c M1. |
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515 | |
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516 | template<class M1,class M2> |
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517 | class DivMap |
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518 | { |
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519 | const M1 &m1; |
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520 | const M2 &m2; |
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521 | public: |
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522 | typedef typename M1::Key Key; |
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523 | typedef typename M1::Value Value; |
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524 | |
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525 | ///Constructor |
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526 | |
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527 | ///\e |
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528 | /// |
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529 | DivMap(const M1 &_m1,const M2 &_m2) : m1(_m1), m2(_m2) {}; |
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530 | Value operator[](Key k) const {return m1[k]/m2[k];} |
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531 | }; |
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532 | |
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533 | ///Returns a \ref DivMap class |
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534 | |
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535 | ///This function just returns a \ref DivMap class. |
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536 | ///\relates DivMap |
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537 | template<class M1,class M2> |
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538 | inline DivMap<M1,M2> divMap(const M1 &m1,const M2 &m2) |
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539 | { |
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540 | return DivMap<M1,M2>(m1,m2); |
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541 | } |
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542 | |
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543 | ///Composition of two maps |
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544 | |
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545 | ///This \ref concept::ReadMap "read only map" returns the composition of |
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546 | ///two |
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547 | ///given maps. That is to say, if \c m1 is of type \c M1 and \c m2 is |
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548 | ///of \c M2, |
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549 | ///then for |
---|
550 | ///\code |
---|
551 | /// ComposeMap<M1,M2> cm(m1,m2); |
---|
552 | ///\endcode |
---|
553 | /// <tt>cm[x]</tt> will be equal to <tt>m1[m2[x]]</tt> |
---|
554 | /// |
---|
555 | ///Its \c Key is inherited from \c M2 and its \c Value is from |
---|
556 | ///\c M1. |
---|
557 | ///The \c M2::Value must be convertible to \c M1::Key. |
---|
558 | ///\todo Check the requirements. |
---|
559 | |
---|
560 | template<class M1,class M2> |
---|
561 | class ComposeMap |
---|
562 | { |
---|
563 | const M1 &m1; |
---|
564 | const M2 &m2; |
---|
565 | public: |
---|
566 | typedef typename M2::Key Key; |
---|
567 | typedef typename M1::Value Value; |
---|
568 | |
---|
569 | ///Constructor |
---|
570 | |
---|
571 | ///\e |
---|
572 | /// |
---|
573 | ComposeMap(const M1 &_m1,const M2 &_m2) : m1(_m1), m2(_m2) {}; |
---|
574 | Value operator[](Key k) const {return m1[m2[k]];} |
---|
575 | }; |
---|
576 | ///Returns a \ref ComposeMap class |
---|
577 | |
---|
578 | ///This function just returns a \ref ComposeMap class. |
---|
579 | /// |
---|
580 | ///\relates ComposeMap |
---|
581 | template<class M1,class M2> |
---|
582 | inline ComposeMap<M1,M2> composeMap(const M1 &m1,const M2 &m2) |
---|
583 | { |
---|
584 | return ComposeMap<M1,M2>(m1,m2); |
---|
585 | } |
---|
586 | |
---|
587 | ///Combine of two maps using an STL (binary) functor. |
---|
588 | |
---|
589 | ///Combine of two maps using an STL (binary) functor. |
---|
590 | /// |
---|
591 | /// |
---|
592 | ///This \ref concept::ReadMap "read only map" takes to maps and a |
---|
593 | ///binary functor and returns the composition of |
---|
594 | ///two |
---|
595 | ///given maps unsing the functor. |
---|
596 | ///That is to say, if \c m1 and \c m2 is of type \c M1 and \c M2 |
---|
597 | ///and \c f is of \c F, |
---|
598 | ///then for |
---|
599 | ///\code |
---|
600 | /// CombineMap<M1,M2,F,V> cm(m1,m2,f); |
---|
601 | ///\endcode |
---|
602 | /// <tt>cm[x]</tt> will be equal to <tt>f(m1[x],m2[x])</tt> |
---|
603 | /// |
---|
604 | ///Its \c Key is inherited from \c M1 and its \c Value is \c V. |
---|
605 | ///The \c M2::Value and \c M1::Value must be convertible to the corresponding |
---|
606 | ///input parameter of \c F and the return type of \c F must be convertible |
---|
607 | ///to \c V. |
---|
608 | ///\todo Check the requirements. |
---|
609 | |
---|
610 | template<class M1,class M2,class F,class V> |
---|
611 | class CombineMap |
---|
612 | { |
---|
613 | const M1 &m1; |
---|
614 | const M2 &m2; |
---|
615 | const F &f; |
---|
616 | public: |
---|
617 | typedef typename M1::Key Key; |
---|
618 | typedef V Value; |
---|
619 | |
---|
620 | ///Constructor |
---|
621 | |
---|
622 | ///\e |
---|
623 | /// |
---|
624 | CombineMap(const M1 &_m1,const M2 &_m2,const F &_f) |
---|
625 | : m1(_m1), m2(_m2), f(_f) {}; |
---|
626 | Value operator[](Key k) const {return f(m1[k],m2[k]);} |
---|
627 | }; |
---|
628 | |
---|
629 | ///Returns a \ref CombineMap class |
---|
630 | |
---|
631 | ///This function just returns a \ref CombineMap class. |
---|
632 | /// |
---|
633 | ///Only the first template parameter (the value type) must be given. |
---|
634 | /// |
---|
635 | ///For example if \c m1 and \c m2 are both \c double valued maps, then |
---|
636 | ///\code |
---|
637 | ///combineMap<double>(m1,m2,std::plus<double>) |
---|
638 | ///\endcode |
---|
639 | ///is equivalent with |
---|
640 | ///\code |
---|
641 | ///addMap(m1,m2) |
---|
642 | ///\endcode |
---|
643 | /// |
---|
644 | ///\relates CombineMap |
---|
645 | template<class V,class M1,class M2,class F> |
---|
646 | inline CombineMap<M1,M2,F,V> combineMap(const M1 &m1,const M2 &m2,const F &f) |
---|
647 | { |
---|
648 | return CombineMap<M1,M2,F,V>(m1,m2,f); |
---|
649 | } |
---|
650 | |
---|
651 | ///Negative value of a map |
---|
652 | |
---|
653 | ///This \ref concept::ReadMap "read only map" returns the negative |
---|
654 | ///value of the |
---|
655 | ///value returned by the |
---|
656 | ///given map. Its \c Key and \c Value will be inherited from \c M. |
---|
657 | ///The unary \c - operator must be defined for \c Value, of course. |
---|
658 | |
---|
659 | template<class M> |
---|
660 | class NegMap |
---|
661 | { |
---|
662 | const M &m; |
---|
663 | public: |
---|
664 | typedef typename M::Key Key; |
---|
665 | typedef typename M::Value Value; |
---|
666 | |
---|
667 | ///Constructor |
---|
668 | |
---|
669 | ///\e |
---|
670 | /// |
---|
671 | NegMap(const M &_m) : m(_m) {}; |
---|
672 | Value operator[](Key k) const {return -m[k];} |
---|
673 | }; |
---|
674 | |
---|
675 | ///Returns a \ref NegMap class |
---|
676 | |
---|
677 | ///This function just returns a \ref NegMap class. |
---|
678 | ///\relates NegMap |
---|
679 | template<class M> |
---|
680 | inline NegMap<M> negMap(const M &m) |
---|
681 | { |
---|
682 | return NegMap<M>(m); |
---|
683 | } |
---|
684 | |
---|
685 | |
---|
686 | ///Absolute value of a map |
---|
687 | |
---|
688 | ///This \ref concept::ReadMap "read only map" returns the absolute value |
---|
689 | ///of the |
---|
690 | ///value returned by the |
---|
691 | ///given map. Its \c Key and \c Value will be inherited |
---|
692 | ///from <tt>M</tt>. <tt>Value</tt> |
---|
693 | ///must be comparable to <tt>0</tt> and the unary <tt>-</tt> |
---|
694 | ///operator must be defined for it, of course. |
---|
695 | /// |
---|
696 | ///\bug We need a unified way to handle the situation below: |
---|
697 | ///\code |
---|
698 | /// struct _UnConvertible {}; |
---|
699 | /// template<class A> inline A t_abs(A a) {return _UnConvertible();} |
---|
700 | /// template<> inline int t_abs<>(int n) {return abs(n);} |
---|
701 | /// template<> inline long int t_abs<>(long int n) {return labs(n);} |
---|
702 | /// template<> inline long long int t_abs<>(long long int n) {return ::llabs(n);} |
---|
703 | /// template<> inline float t_abs<>(float n) {return fabsf(n);} |
---|
704 | /// template<> inline double t_abs<>(double n) {return fabs(n);} |
---|
705 | /// template<> inline long double t_abs<>(long double n) {return fabsl(n);} |
---|
706 | ///\endcode |
---|
707 | |
---|
708 | |
---|
709 | template<class M> |
---|
710 | class AbsMap |
---|
711 | { |
---|
712 | const M &m; |
---|
713 | public: |
---|
714 | typedef typename M::Key Key; |
---|
715 | typedef typename M::Value Value; |
---|
716 | |
---|
717 | ///Constructor |
---|
718 | |
---|
719 | ///\e |
---|
720 | /// |
---|
721 | AbsMap(const M &_m) : m(_m) {}; |
---|
722 | Value operator[](Key k) const {Value tmp=m[k]; return tmp>=0?tmp:-tmp;} |
---|
723 | }; |
---|
724 | |
---|
725 | ///Returns a \ref AbsMap class |
---|
726 | |
---|
727 | ///This function just returns a \ref AbsMap class. |
---|
728 | ///\relates AbsMap |
---|
729 | template<class M> |
---|
730 | inline AbsMap<M> absMap(const M &m) |
---|
731 | { |
---|
732 | return AbsMap<M>(m); |
---|
733 | } |
---|
734 | |
---|
735 | ///Converts an STL style functor to a a map |
---|
736 | |
---|
737 | ///This \ref concept::ReadMap "read only map" returns the value |
---|
738 | ///of a |
---|
739 | ///given map. |
---|
740 | /// |
---|
741 | ///Template parameters \c K and \c V will become its |
---|
742 | ///\c Key and \c Value. They must be given explicitely |
---|
743 | ///because a functor does not provide such typedefs. |
---|
744 | /// |
---|
745 | ///Parameter \c F is the type of the used functor. |
---|
746 | |
---|
747 | |
---|
748 | template<class K,class V,class F> |
---|
749 | class FunctorMap |
---|
750 | { |
---|
751 | const F &f; |
---|
752 | public: |
---|
753 | typedef K Key; |
---|
754 | typedef V Value; |
---|
755 | |
---|
756 | ///Constructor |
---|
757 | |
---|
758 | ///\e |
---|
759 | /// |
---|
760 | FunctorMap(const F &_f) : f(_f) {}; |
---|
761 | Value operator[](Key k) const {return f(k);} |
---|
762 | }; |
---|
763 | |
---|
764 | ///Returns a \ref FunctorMap class |
---|
765 | |
---|
766 | ///This function just returns a \ref FunctorMap class. |
---|
767 | /// |
---|
768 | ///The third template parameter isn't necessary to be given. |
---|
769 | ///\relates FunctorMap |
---|
770 | template<class K,class V, class F> |
---|
771 | inline FunctorMap<K,V,F> functorMap(const F &f) |
---|
772 | { |
---|
773 | return FunctorMap<K,V,F>(f); |
---|
774 | } |
---|
775 | |
---|
776 | ///Converts a map to an STL style (unary) functor |
---|
777 | |
---|
778 | ///This class Converts a map to an STL style (unary) functor. |
---|
779 | ///that is it provides an <tt>operator()</tt> to read its values. |
---|
780 | /// |
---|
781 | ///For the sake of convenience it also works as |
---|
782 | ///a ususal \ref concept::ReadMap "readable map", i.e |
---|
783 | ///<tt>operator[]</tt> and the \c Key and \c Value typedefs also exist. |
---|
784 | |
---|
785 | template<class M> |
---|
786 | class MapFunctor |
---|
787 | { |
---|
788 | const M &m; |
---|
789 | public: |
---|
790 | typedef typename M::Key argument_type; |
---|
791 | typedef typename M::Value result_type; |
---|
792 | typedef typename M::Key Key; |
---|
793 | typedef typename M::Value Value; |
---|
794 | |
---|
795 | ///Constructor |
---|
796 | |
---|
797 | ///\e |
---|
798 | /// |
---|
799 | MapFunctor(const M &_m) : m(_m) {}; |
---|
800 | ///Returns a value of the map |
---|
801 | |
---|
802 | ///\e |
---|
803 | /// |
---|
804 | Value operator()(Key k) const {return m[k];} |
---|
805 | ///\e |
---|
806 | /// |
---|
807 | Value operator[](Key k) const {return m[k];} |
---|
808 | }; |
---|
809 | |
---|
810 | ///Returns a \ref MapFunctor class |
---|
811 | |
---|
812 | ///This function just returns a \ref MapFunctor class. |
---|
813 | ///\relates MapFunctor |
---|
814 | template<class M> |
---|
815 | inline MapFunctor<M> mapFunctor(const M &m) |
---|
816 | { |
---|
817 | return MapFunctor<M>(m); |
---|
818 | } |
---|
819 | |
---|
820 | |
---|
821 | ///Apply all map setting operations to two maps |
---|
822 | |
---|
823 | ///This map has two \ref concept::WriteMap "writable map" |
---|
824 | ///parameters and each write request will be passed to both of them. |
---|
825 | ///If \c M1 is also \ref concept::ReadMap "readable", |
---|
826 | ///then the read operations will return the |
---|
827 | ///corresponding values of \c M1. |
---|
828 | /// |
---|
829 | ///The \c Key and \c Value will be inherited from \c M1. |
---|
830 | ///The \c Key and \c Value of M2 must be convertible from those of \c M1. |
---|
831 | |
---|
832 | template<class M1,class M2> |
---|
833 | class ForkMap |
---|
834 | { |
---|
835 | const M1 &m1; |
---|
836 | const M2 &m2; |
---|
837 | public: |
---|
838 | typedef typename M1::Key Key; |
---|
839 | typedef typename M1::Value Value; |
---|
840 | |
---|
841 | ///Constructor |
---|
842 | |
---|
843 | ///\e |
---|
844 | /// |
---|
845 | ForkMap(const M1 &_m1,const M2 &_m2) : m1(_m1), m2(_m2) {}; |
---|
846 | Value operator[](Key k) const {return m1[k];} |
---|
847 | void set(Key k,const Value &v) {m1.set(k,v); m2.set(k,v);} |
---|
848 | }; |
---|
849 | |
---|
850 | ///Returns an \ref ForkMap class |
---|
851 | |
---|
852 | ///This function just returns an \ref ForkMap class. |
---|
853 | ///\todo How to call these type of functions? |
---|
854 | /// |
---|
855 | ///\relates ForkMap |
---|
856 | ///\todo Wrong scope in Doxygen when \c \\relates is used |
---|
857 | template<class M1,class M2> |
---|
858 | inline ForkMap<M1,M2> forkMap(const M1 &m1,const M2 &m2) |
---|
859 | { |
---|
860 | return ForkMap<M1,M2>(m1,m2); |
---|
861 | } |
---|
862 | |
---|
863 | /// @} |
---|
864 | |
---|
865 | } |
---|
866 | |
---|
867 | |
---|
868 | #endif // LEMON_MAPS_H |
---|