1 | using HeuristicLab.Algorithms.PushGP.Interpreter;
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2 | using HeuristicLab.Algorithms.PushGP.Stack;
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3 | using HeuristicLab.Common;
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4 |
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5 | namespace HeuristicLab.Algorithms.PushGP.Expressions
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6 | {
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7 | /// <summary>
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8 | /// Duplicates the top item on the INTEGER stack. Does not pop its argument
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9 | /// (which, if it did, would negate the effect of the duplication!).
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10 | /// </summary>
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11 | /// <typeparam name="T">Stacktype</typeparam>
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12 | public abstract class DuplicateExpression<T> : Expression
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13 | {
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14 | public DuplicateExpression(string stringRepresentation) : base(stringRepresentation)
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15 | { }
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16 |
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17 | public void Eval(IStack<T> stack)
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18 | {
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19 | if (stack.Count == 0)
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20 | return;
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21 |
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22 | var clone = this.Clone(stack.Top);
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23 |
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24 | stack.Push(clone);
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25 | }
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26 |
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27 | public abstract T Clone(T original);
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28 | }
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29 |
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30 | public class IntegerDuplicateExpression : DuplicateExpression<long>
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31 | {
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32 | public IntegerDuplicateExpression() : base("INTEGER.DUP")
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33 | { }
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34 |
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35 | public override void Eval(IInterpreter interpreter)
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36 | {
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37 | this.Eval(interpreter.IntegerStack);
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38 | }
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39 |
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40 | public override long Clone(long value)
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41 | {
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42 | return value;
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43 | }
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44 | }
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45 |
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46 | public class FloatDuplicateExpression : DuplicateExpression<double>
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47 | {
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48 | public FloatDuplicateExpression() : base("FLOAT.DUP")
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49 | { }
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50 |
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51 | public override void Eval(IInterpreter interpreter)
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52 | {
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53 | this.Eval(interpreter.FloatStack);
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54 | }
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55 |
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56 | public override double Clone(double value)
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57 | {
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58 | return value;
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59 | }
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60 | }
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61 |
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62 | public class BooleanDuplicateExpression : DuplicateExpression<bool>
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63 | {
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64 | public BooleanDuplicateExpression() : base("BOOLEAN.DUP")
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65 | { }
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66 |
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67 | public override void Eval(IInterpreter interpreter)
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68 | {
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69 | this.Eval(interpreter.BooleanStack);
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70 | }
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71 |
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72 | public override bool Clone(bool value)
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73 | {
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74 | return value;
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75 | }
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76 | }
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77 |
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78 | public class NameDuplicateExpression : DuplicateExpression<string>
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79 | {
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80 | public NameDuplicateExpression() : base("NAME.DUP")
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81 | { }
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82 |
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83 | public override void Eval(IInterpreter interpreter)
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84 | {
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85 | this.Eval(interpreter.NameStack);
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86 | }
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87 |
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88 | public override string Clone(string value)
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89 | {
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90 | return string.Copy(value);
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91 | }
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92 | }
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93 |
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94 | public class ExecDuplicateExpression : DuplicateExpression<Expression>
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95 | {
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96 | private readonly Cloner cloner = new Cloner();
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97 | public ExecDuplicateExpression() : base("EXEC.DUP")
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98 | { }
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99 |
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100 | public override void Eval(IInterpreter interpreter)
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101 | {
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102 | this.Eval(interpreter.ExecStack);
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103 | }
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104 |
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105 | public override Expression Clone(Expression original)
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106 | {
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107 | return cloner.Clone(original);
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108 | }
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109 | }
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110 |
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111 | public class CodeDuplicateExpression : DuplicateExpression<Expression>
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112 | {
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113 | private readonly Cloner cloner = new Cloner();
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114 |
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115 | public CodeDuplicateExpression() : base("CODE.DUP")
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116 | { }
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117 |
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118 | public override void Eval(IInterpreter interpreter)
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119 | {
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120 | this.Eval(interpreter.CodeStack);
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121 | }
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122 |
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123 | public override Expression Clone(Expression original)
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124 | {
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125 | return cloner.Clone(original);
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126 | }
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127 | }
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128 | }
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