1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Linq;
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24 | using HeuristicLab.Common;
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25 | using HeuristicLab.Core;
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26 | using HeuristicLab.Data;
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27 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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28 | using HeuristicLab.Optimization;
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29 | using HeuristicLab.Parameters;
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30 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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31 | using HeuristicLab.PluginInfrastructure;
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32 |
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33 | namespace HeuristicLab.Problems.LawnMower {
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34 | [StorableClass]
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35 | [Creatable("Problems")]
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36 | [Item("Lawn Mower Problem", "The lawn mower demo problem for genetic programming.")]
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37 | public class Problem : SingleObjectiveHeuristicOptimizationProblem<Evaluator, ISymbolicExpressionTreeCreator> {
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38 | private const string LawnWidthParameterName = "LawnWidth";
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39 | private const string LawnLengthParameterName = "LawnLength";
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40 | private const string LawnMowerProgramParameterName = "Program";
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41 | private const string MaxLawnMowerProgramLengthParameterName = "MaxProgramLength";
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42 | private const string MaxLawnMowerProgramDepthParameterName = "MaxProgramDepth";
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43 | private const string LawnMowerGrammarParameterName = "Grammar";
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44 |
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45 | public IFixedValueParameter<IntValue> LawnWidthParameter {
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46 | get { return (IFixedValueParameter<IntValue>)Parameters[LawnWidthParameterName]; }
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47 | }
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48 | public IFixedValueParameter<IntValue> LawnLengthParameter {
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49 | get { return (IFixedValueParameter<IntValue>)Parameters[LawnLengthParameterName]; }
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50 | }
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51 | public IFixedValueParameter<IntValue> MaxLawnMowerProgramLengthParameter {
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52 | get { return (IFixedValueParameter<IntValue>)Parameters[MaxLawnMowerProgramLengthParameterName]; }
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53 | }
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54 | public IFixedValueParameter<IntValue> MaxLawnMowerProgramDepthParameter {
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55 | get { return (IFixedValueParameter<IntValue>)Parameters[MaxLawnMowerProgramDepthParameterName]; }
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56 | }
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57 | public IValueParameter<Grammar> GrammarParameter {
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58 | get { return (IValueParameter<Grammar>)Parameters[LawnMowerGrammarParameterName]; }
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59 | }
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60 |
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61 | [StorableConstructor]
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62 | protected Problem(bool deserializing)
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63 | : base(deserializing) {
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64 | }
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65 | protected Problem(Problem original, Cloner cloner)
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66 | : base(original, cloner) {
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67 | RegisterEventHandlers();
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68 | }
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69 | public Problem()
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70 | : base(new Evaluator(), new RampedHalfAndHalfTreeCreator()) {
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71 | Parameters.Add(new FixedValueParameter<IntValue>(LawnWidthParameterName, "Width of the lawn.", new IntValue(8)));
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72 | Parameters.Add(new FixedValueParameter<IntValue>(LawnLengthParameterName, "Length of the lawn.", new IntValue(8)));
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73 | Parameters.Add(new FixedValueParameter<IntValue>(MaxLawnMowerProgramDepthParameterName, "Maximal depth of the lawn mower program.", new IntValue(13)));
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74 | Parameters.Add(new FixedValueParameter<IntValue>(MaxLawnMowerProgramLengthParameterName, "Maximal length of the lawn mower program.", new IntValue(1000)));
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75 | Parameters.Add(new ValueParameter<Grammar>(LawnMowerGrammarParameterName, "Grammar for the lawn mower program.",
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76 | new Grammar()));
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77 | Maximization.Value = true;
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78 | InitializeOperators();
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79 |
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80 | RegisterEventHandlers();
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81 | }
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82 |
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83 |
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84 | [StorableHook(HookType.AfterDeserialization)]
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85 | private void AfterDeserialization() {
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86 | RegisterEventHandlers();
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87 | }
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88 |
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89 | public override IDeepCloneable Clone(Cloner cloner) {
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90 | return new Problem(this, cloner);
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91 | }
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92 |
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93 | private void InitializeOperators() {
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94 | Operators.AddRange(ApplicationManager.Manager.GetInstances<ISymbolicExpressionTreeOperator>());
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95 | Operators.Add(new MinAverageMaxSymbolicExpressionTreeLengthAnalyzer());
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96 | Operators.Add(new SymbolicExpressionSymbolFrequencyAnalyzer());
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97 | Operators.Add(new BestSolutionAnalyzer());
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98 | ParameterizeOperators();
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99 | ParameterizeAnalyzers();
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100 | }
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101 |
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102 |
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103 | private void RegisterEventHandlers() {
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104 | Evaluator.QualityParameter.ActualNameChanged += QualityParameterOnActualNameChanged;
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105 | SolutionCreator.SymbolicExpressionTreeParameter.ActualNameChanged +=
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106 | SymbolicExpressionTreeParameterOnActualNameChanged;
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107 | }
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108 |
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109 |
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110 |
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111 | protected override void OnEvaluatorChanged() {
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112 | base.OnEvaluatorChanged();
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113 | Evaluator.LawnMowerProgramParameter.ActualName = LawnMowerProgramParameterName;
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114 | Evaluator.LawnLengthParameter.ActualName = LawnLengthParameterName;
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115 | Evaluator.LawnWidthParameter.ActualName = LawnWidthParameterName;
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116 | Evaluator.QualityParameter.ActualNameChanged += QualityParameterOnActualNameChanged;
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117 | ParameterizeAnalyzers();
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118 | ParameterizeOperators();
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119 | }
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120 |
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121 | protected override void OnSolutionCreatorChanged() {
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122 | base.OnSolutionCreatorChanged();
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123 | SolutionCreator.SymbolicExpressionTreeParameter.ActualName = LawnMowerProgramParameterName;
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124 | SolutionCreator.SymbolicExpressionTreeParameter.ActualNameChanged += SymbolicExpressionTreeParameterOnActualNameChanged;
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125 | ParameterizeAnalyzers();
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126 | ParameterizeOperators();
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127 | }
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128 |
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129 | private void SymbolicExpressionTreeParameterOnActualNameChanged(object sender, EventArgs eventArgs) {
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130 | ParameterizeAnalyzers();
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131 | ParameterizeOperators();
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132 | }
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133 |
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134 | private void QualityParameterOnActualNameChanged(object sender, EventArgs eventArgs) {
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135 | ParameterizeAnalyzers();
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136 | ParameterizeOperators();
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137 | }
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138 |
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139 | private void ParameterizeAnalyzers() {
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140 | var analyzers = Operators.OfType<IAnalyzer>();
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141 | foreach (var o in analyzers.OfType<ISymbolicExpressionTreeAnalyzer>()) {
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142 | o.SymbolicExpressionTreeParameter.ActualName = SolutionCreator.SymbolicExpressionTreeParameter.ActualName;
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143 | }
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144 | foreach (var o in analyzers.OfType<BestSolutionAnalyzer>()) {
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145 | o.QualityParameter.ActualName = Evaluator.QualityParameter.ActualName;
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146 | }
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147 | }
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148 |
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149 | private void ParameterizeOperators() {
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150 | var operators = Parameters
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151 | .OfType<IValueParameter>()
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152 | .Select(p => p.Value)
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153 | .OfType<IOperator>()
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154 | .Union(Operators);
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155 | foreach (var o in operators.OfType<ISymbolicExpressionTreeGrammarBasedOperator>()) {
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156 | o.SymbolicExpressionTreeGrammarParameter.ActualName = LawnMowerGrammarParameterName;
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157 | }
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158 | foreach (var o in operators.OfType<ISymbolicExpressionTreeSizeConstraintOperator>()) {
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159 | o.MaximumSymbolicExpressionTreeDepthParameter.ActualName = MaxLawnMowerProgramDepthParameterName;
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160 | o.MaximumSymbolicExpressionTreeLengthParameter.ActualName = MaxLawnMowerProgramLengthParameterName;
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161 | }
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162 | foreach (var op in operators.OfType<Evaluator>()) {
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163 | op.LawnMowerProgramParameter.ActualName = SolutionCreator.SymbolicExpressionTreeParameter.ActualName;
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164 | op.LawnLengthParameter.ActualName = LawnLengthParameterName;
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165 | op.LawnWidthParameter.ActualName = LawnWidthParameterName;
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166 | }
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167 | foreach (var op in operators.OfType<ISymbolicExpressionTreeCrossover>()) {
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168 | op.ParentsParameter.ActualName = SolutionCreator.SymbolicExpressionTreeParameter.ActualName;
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169 | op.ChildParameter.ActualName = SolutionCreator.SymbolicExpressionTreeParameter.ActualName;
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170 | }
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171 | foreach (var op in operators.OfType<ISymbolicExpressionTreeManipulator>()) {
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172 | op.SymbolicExpressionTreeParameter.ActualName = SolutionCreator.SymbolicExpressionTreeParameter.ActualName;
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173 | }
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174 | foreach (var op in operators.OfType<ISymbolicExpressionTreeCreator>()) {
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175 | op.SymbolicExpressionTreeParameter.ActualName = SolutionCreator.SymbolicExpressionTreeParameter.ActualName;
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176 | }
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177 | }
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178 | }
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179 | }
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