1 | namespace HeuristicLab.Problems.ProgramSynthesis.Push.Expressions {
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2 | using HeuristicLab.Problems.ProgramSynthesis.Push.Attributes;
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3 | using HeuristicLab.Problems.ProgramSynthesis.Push.Generators;
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4 | using HeuristicLab.Problems.ProgramSynthesis.Push.Interpreter;
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5 | using HeuristicLab.Problems.ProgramSynthesis.Push.Stack;
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6 |
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7 | /// <summary>
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8 | /// Pushes a random NAME.
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9 | /// </summary>
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10 | [PushExpression(StackType.Name, "NAME.RAND")]
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11 | public class NameRandExpression : StatelessExpression {
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12 | public override bool Eval(IPushInterpreter interpreter) {
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13 | var name = NameGenerator.RandomName(interpreter.Random);
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14 |
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15 | interpreter.NameStack.Push(name);
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16 | return true;
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17 | }
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18 | }
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19 |
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20 | /// <summary>
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21 | /// Pushes a random integer.
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22 | /// </summary>
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23 | [PushExpression(StackType.Integer, "INTEGER.RAND")]
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24 | public class IntegerRandExpression : StatelessExpression {
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25 | public override bool Eval(IPushInterpreter interpreter) {
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26 | var value = interpreter.Random.Next(
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27 | interpreter.Configuration.MinRandomInteger,
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28 | interpreter.Configuration.MaxRandomInteger);
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29 |
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30 | interpreter.IntegerStack.Push(value);
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31 | return true;
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32 | }
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33 | }
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34 |
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35 | /// <summary>
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36 | /// Pushes a random float.
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37 | /// </summary>
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38 | [PushExpression(StackType.Float, "FLOAT.RAND")]
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39 | public class FloatRandExpression : StatelessExpression {
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40 | public override bool Eval(IPushInterpreter interpreter) {
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41 | var value = interpreter.Random.NextDouble() * (interpreter.Configuration.MaxRandomFloat - interpreter.Configuration.MinRandomFloat) + interpreter.Configuration.MinRandomFloat;
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42 |
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43 | interpreter.FloatStack.Push(value);
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44 | return true;
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45 | }
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46 | }
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47 |
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48 | /// <summary>
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49 | /// Pushes a random boolean.
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50 | /// </summary>
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51 | [PushExpression(StackType.Boolean, "BOOLEAN.RAND")]
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52 | public class BooleanRandExpression : StatelessExpression {
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53 | public override bool Eval(IPushInterpreter interpreter) {
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54 | var value = interpreter.Random.NextDouble() > 0.5;
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55 |
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56 | interpreter.BooleanStack.Push(value);
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57 | return true;
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58 | }
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59 | }
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60 |
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61 | /// <summary>
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62 | /// Pushes random expressions onto the code stack.
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63 | /// </summary>
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64 | [PushExpression(StackType.Code, "CODE.RAND")]
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65 | public class CodeRandExpression : StatelessExpression {
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66 | public override bool Eval(IPushInterpreter interpreter) {
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67 | if (interpreter.IntegerStack.Count == 0 ||
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68 | interpreter.IntegerStack.Top < 1) return false;
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69 |
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70 | var size = (int)(interpreter.IntegerStack.Pop() % interpreter.Configuration.MaxPointsInRandomExpression);
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71 | var program = CodeGenerator.RandomExpandExpression(
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72 | size,
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73 | interpreter.Random,
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74 | interpreter.Configuration,
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75 | interpreter.CustomExpressions);
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76 |
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77 | interpreter.CodeStack.Push(program);
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78 | return true;
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79 | }
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80 | }
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81 | } |
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