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 PushResultExpressionTemplate<T, R> : 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<IInterpreter, IStack<R>> targetStackProvider;
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11 | private readonly Func<T[], R> templateFunc;
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12 | private readonly bool isCodeOp;
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13 | public PushResultExpressionTemplate(string symbol, Func<IInterpreter, IStack<T>> sourceStackProvider, Func<IInterpreter, IStack<R>> targetSourceProvider, Func<T[], R> templateFunc, bool isCodeOp = false) : base(symbol)
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14 | {
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15 | this.sourceStackProvider = sourceStackProvider;
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16 | this.targetStackProvider = targetSourceProvider;
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17 | this.templateFunc = templateFunc;
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18 |
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19 | this.isCodeOp = isCodeOp;
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20 | }
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21 |
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22 | public override bool IsCodeOp { get { return this.isCodeOp; } }
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23 |
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24 | public override void Eval(IInterpreter interpreter)
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25 | {
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26 | var sourceStack = this.sourceStackProvider(interpreter);
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27 |
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28 | // not enough arguments on stack
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29 | if (sourceStack.Count < 2)
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30 | return;
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31 |
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32 | var targetStack = this.targetStackProvider(interpreter);
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33 |
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34 | var values = sourceStack.Pop(2);
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35 | var result = this.templateFunc(values);
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36 |
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37 | targetStack.Push(result);
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38 | }
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39 | }
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40 | }
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