[14834] | 1 | using System.Collections.Generic;
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| 2 |
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| 3 | namespace HeuristicLab.Problems.ProgramSynthesis.Push.Expressions {
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| 4 | using HeuristicLab.Problems.ProgramSynthesis.Push.Attributes;
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| 5 | using HeuristicLab.Problems.ProgramSynthesis.Push.Interpreter;
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| 6 | using HeuristicLab.Problems.ProgramSynthesis.Push.Stack;
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| 7 |
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| 8 | /// <summary>
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| 9 | /// Replaces all occurrences of the second lit-type item with the first lit-type item in the top type vector.
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| 10 | /// </summary>
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| 11 | /// <typeparam name="T"></typeparam>
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| 12 | public abstract class VectorReplaceExpression<T> : StatelessExpression {
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| 13 | protected bool Eval(IPushStack<List<T>> vectorStack, IPushStack<T> literalStack) {
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| 14 | if (vectorStack.IsEmpty ||
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| 15 | literalStack.Count < 2)
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| 16 | return false;
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| 17 |
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| 18 | var vector = vectorStack.Top;
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| 19 | var first = literalStack.Top;
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[14875] | 20 | var second = literalStack[1];
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[14834] | 21 | literalStack.Remove(2);
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| 22 |
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| 23 | for (var i = 0; i < vector.Count; i++) {
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| 24 | if (vector[i].Equals(second))
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| 25 | vector[i] = first;
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| 26 | }
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| 27 |
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| 28 | return true;
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| 29 | }
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| 30 | }
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| 31 |
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| 32 | [PushExpression(StackTypes.IntegerVector, "INTEGER[].REPLACE", StackTypes.Integer)]
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| 33 | public class IntegerVectorReplaceExpression : VectorReplaceExpression<long> {
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| 34 | public override bool Eval(IInternalPushInterpreter interpreter) {
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| 35 | return Eval(interpreter.IntegerVectorStack, interpreter.IntegerStack);
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| 36 | }
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| 37 | }
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| 38 |
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| 39 | [PushExpression(StackTypes.FloatVector, "FLOAT[].REPLACE", StackTypes.Float)]
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| 40 | public class FloatVectorReplaceExpression : VectorReplaceExpression<double> {
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| 41 | public override bool Eval(IInternalPushInterpreter interpreter) {
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| 42 | return Eval(interpreter.FloatVectorStack, interpreter.FloatStack);
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| 43 | }
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| 44 | }
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| 45 |
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| 46 | [PushExpression(StackTypes.BooleanVector, "BOOLEAN[].REPLACE", StackTypes.Boolean)]
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| 47 | public class BooleanVectorReplaceExpression : VectorReplaceExpression<bool> {
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| 48 | public override bool Eval(IInternalPushInterpreter interpreter) {
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| 49 | return Eval(interpreter.BooleanVectorStack, interpreter.BooleanStack);
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| 50 | }
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| 51 | }
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| 52 |
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| 53 | [PushExpression(StackTypes.StringVector, "STRING[].REPLACE", StackTypes.String)]
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| 54 | public class StringVectorReplaceExpression : VectorReplaceExpression<string> {
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| 55 | public override bool Eval(IInternalPushInterpreter interpreter) {
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| 56 | return Eval(interpreter.StringVectorStack, interpreter.StringStack);
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| 57 | }
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| 58 | }
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| 59 | }
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