Last change
on this file since 14328 was
14328,
checked in by pkimmesw, 8 years ago
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#2665 Set .NET version to 4.5, C# version to 5.0, Added expression templates and factory
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File size:
1.5 KB
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1 | using System;
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2 | using HeuristicLab.Algorithms.PushGP.Interpreter;
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3 | using HeuristicLab.Algorithms.PushGP.Stack;
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4 |
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5 | namespace HeuristicLab.Algorithms.PushGP.Expressions.Templates
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6 | {
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7 | public class DefineExpressionTemplate<T> : ExpressionTemplate
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8 | {
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9 | private readonly Func<IInterpreter, IStack<T>> sourceStackProvider;
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10 | private readonly Func<T, Expression> creator;
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11 | private readonly bool isCodeOp;
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12 | public DefineExpressionTemplate(string symbol, Func<IInterpreter, IStack<T>> sourceStackProvider, Func<T, Expression> creator, bool isCodeOp = false) : base(symbol)
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13 | {
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14 | this.sourceStackProvider = sourceStackProvider;
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15 | this.creator = creator;
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16 | this.isCodeOp = isCodeOp;
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17 | }
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18 |
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19 | public override bool IsCodeOp { get { return this.isCodeOp; } }
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20 |
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21 | public override void Eval(IInterpreter interpreter)
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22 | {
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23 | var sourceStack = this.sourceStackProvider(interpreter);
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24 |
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25 | // not enough arguments on stack
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26 | if (interpreter.NameStack.Count == 0 ||
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27 | sourceStack.Count == 0)
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28 | return;
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29 |
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30 | var name = interpreter.NameStack.Pop();
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31 | var expression = creator(sourceStack.Top);
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32 |
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33 | if (interpreter.CustomExpressions.ContainsKey(name))
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34 | {
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35 | interpreter.CustomExpressions[name] = expression;
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36 | }
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37 | else
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38 | {
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39 | interpreter.CustomExpressions.Add(name, expression);
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40 | }
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41 | }
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42 | }
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43 | }
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