1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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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_LP_SKELETON |
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20 | #define LEMON_LP_SKELETON |
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21 | |
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22 | #include <lemon/lp_base.h> |
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23 | |
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24 | ///\file |
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25 | ///\brief A skeleton file to implement LP solver interfaces |
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26 | namespace lemon { |
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27 | |
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28 | ///A skeleton class to implement LP solver interfaces |
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29 | class SkeletonSolverBase : public virtual LpBase { |
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30 | int col_num,row_num; |
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31 | |
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32 | protected: |
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33 | |
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34 | SkeletonSolverBase() |
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35 | : col_num(-1), row_num(-1) {} |
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36 | |
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37 | /// \e |
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38 | virtual int _addCol(); |
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39 | /// \e |
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40 | virtual int _addRow(); |
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41 | /// \e |
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42 | virtual void _eraseCol(int i); |
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43 | /// \e |
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44 | virtual void _eraseRow(int i); |
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45 | |
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46 | /// \e |
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47 | virtual void _getColName(int col, std::string& name) const; |
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48 | /// \e |
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49 | virtual void _setColName(int col, const std::string& name); |
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50 | /// \e |
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51 | virtual int _colByName(const std::string& name) const; |
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52 | |
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53 | /// \e |
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54 | virtual void _getRowName(int row, std::string& name) const; |
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55 | /// \e |
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56 | virtual void _setRowName(int row, const std::string& name); |
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57 | /// \e |
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58 | virtual int _rowByName(const std::string& name) const; |
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59 | |
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60 | /// \e |
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61 | virtual void _setRowCoeffs(int i, ExprIterator b, ExprIterator e); |
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62 | /// \e |
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63 | virtual void _getRowCoeffs(int i, InsertIterator b) const; |
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64 | /// \e |
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65 | virtual void _setColCoeffs(int i, ExprIterator b, ExprIterator e); |
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66 | /// \e |
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67 | virtual void _getColCoeffs(int i, InsertIterator b) const; |
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68 | |
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69 | /// Set one element of the coefficient matrix |
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70 | virtual void _setCoeff(int row, int col, Value value); |
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71 | |
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72 | /// Get one element of the coefficient matrix |
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73 | virtual Value _getCoeff(int row, int col) const; |
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74 | |
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75 | /// The lower bound of a variable (column) have to be given by an |
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76 | /// extended number of type Value, i.e. a finite number of type |
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77 | /// Value or -\ref INF. |
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78 | virtual void _setColLowerBound(int i, Value value); |
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79 | /// \e |
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80 | |
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81 | /// The lower bound of a variable (column) is an |
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82 | /// extended number of type Value, i.e. a finite number of type |
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83 | /// Value or -\ref INF. |
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84 | virtual Value _getColLowerBound(int i) const; |
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85 | |
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86 | /// The upper bound of a variable (column) have to be given by an |
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87 | /// extended number of type Value, i.e. a finite number of type |
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88 | /// Value or \ref INF. |
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89 | virtual void _setColUpperBound(int i, Value value); |
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90 | /// \e |
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91 | |
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92 | /// The upper bound of a variable (column) is an |
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93 | /// extended number of type Value, i.e. a finite number of type |
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94 | /// Value or \ref INF. |
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95 | virtual Value _getColUpperBound(int i) const; |
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96 | |
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97 | /// The lower bound of a constraint (row) have to be given by an |
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98 | /// extended number of type Value, i.e. a finite number of type |
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99 | /// Value or -\ref INF. |
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100 | virtual void _setRowLowerBound(int i, Value value); |
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101 | /// \e |
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102 | |
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103 | /// The lower bound of a constraint (row) is an |
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104 | /// extended number of type Value, i.e. a finite number of type |
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105 | /// Value or -\ref INF. |
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106 | virtual Value _getRowLowerBound(int i) const; |
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107 | |
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108 | /// The upper bound of a constraint (row) have to be given by an |
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109 | /// extended number of type Value, i.e. a finite number of type |
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110 | /// Value or \ref INF. |
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111 | virtual void _setRowUpperBound(int i, Value value); |
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112 | /// \e |
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113 | |
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114 | /// The upper bound of a constraint (row) is an |
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115 | /// extended number of type Value, i.e. a finite number of type |
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116 | /// Value or \ref INF. |
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117 | virtual Value _getRowUpperBound(int i) const; |
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118 | |
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119 | /// \e |
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120 | virtual void _setObjCoeffs(ExprIterator b, ExprIterator e); |
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121 | /// \e |
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122 | virtual void _getObjCoeffs(InsertIterator b) const; |
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123 | |
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124 | /// \e |
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125 | virtual void _setObjCoeff(int i, Value obj_coef); |
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126 | /// \e |
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127 | virtual Value _getObjCoeff(int i) const; |
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128 | |
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129 | ///\e |
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130 | virtual void _setSense(Sense); |
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131 | ///\e |
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132 | virtual Sense _getSense() const; |
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133 | |
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134 | ///\e |
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135 | virtual void _clear(); |
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136 | |
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137 | }; |
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138 | |
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139 | /// \brief Interface for a skeleton LP solver |
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140 | /// |
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141 | /// This class implements an interface for a skeleton LP solver. |
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142 | ///\ingroup lp_group |
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143 | class LpSkeleton : public SkeletonSolverBase, public LpSolver { |
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144 | public: |
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145 | LpSkeleton() : SkeletonSolverBase(), LpSolver() {} |
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146 | |
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147 | protected: |
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148 | |
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149 | ///\e |
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150 | virtual SolveExitStatus _solve(); |
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151 | |
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152 | ///\e |
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153 | virtual Value _getPrimal(int i) const; |
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154 | ///\e |
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155 | virtual Value _getDual(int i) const; |
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156 | |
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157 | ///\e |
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158 | virtual Value _getPrimalValue() const; |
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159 | |
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160 | ///\e |
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161 | virtual Value _getPrimalRay(int i) const; |
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162 | ///\e |
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163 | virtual Value _getDualRay(int i) const; |
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164 | |
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165 | ///\e |
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166 | virtual ProblemType _getPrimalType() const; |
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167 | ///\e |
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168 | virtual ProblemType _getDualType() const; |
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169 | |
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170 | ///\e |
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171 | virtual VarStatus _getColStatus(int i) const; |
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172 | ///\e |
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173 | virtual VarStatus _getRowStatus(int i) const; |
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174 | |
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175 | ///\e |
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176 | virtual LpSkeleton* _newSolver() const; |
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177 | ///\e |
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178 | virtual LpSkeleton* _cloneSolver() const; |
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179 | ///\e |
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180 | virtual const char* _solverName() const; |
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181 | |
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182 | }; |
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183 | |
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184 | /// \brief Interface for a skeleton MIP solver |
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185 | /// |
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186 | /// This class implements an interface for a skeleton MIP solver. |
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187 | ///\ingroup lp_group |
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188 | class MipSkeleton : public SkeletonSolverBase, public MipSolver { |
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189 | public: |
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190 | MipSkeleton() : SkeletonSolverBase(), MipSolver() {} |
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191 | |
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192 | protected: |
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193 | ///\e |
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194 | |
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195 | ///\bug Wrong interface |
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196 | /// |
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197 | virtual SolveExitStatus _solve(); |
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198 | |
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199 | ///\e |
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200 | |
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201 | ///\bug Wrong interface |
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202 | /// |
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203 | virtual Value _getSol(int i) const; |
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204 | |
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205 | ///\e |
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206 | |
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207 | ///\bug Wrong interface |
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208 | /// |
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209 | virtual Value _getSolValue() const; |
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210 | |
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211 | ///\e |
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212 | |
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213 | ///\bug Wrong interface |
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214 | /// |
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215 | virtual ProblemType _getType() const; |
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216 | |
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217 | ///\e |
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218 | virtual MipSkeleton* _newSolver() const; |
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219 | |
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220 | ///\e |
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221 | virtual MipSkeleton* _cloneSolver() const; |
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222 | ///\e |
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223 | virtual const char* _solverName() const; |
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224 | |
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225 | }; |
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226 | |
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227 | } //namespace lemon |
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228 | |
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229 | #endif // LEMON_LP_SKELETON |
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