1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using HeuristicLab.Common;
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23 | using HeuristicLab.Core;
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24 | using HEAL.Attic;
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25 | namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
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26 | [StorableType("37172E73-BBC8-448F-B694-60705C5B4E53")]
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27 | [Item(StartSymbol.StartSymbolName, StartSymbol.StartSymbolDescription)]
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28 | public sealed class StartSymbol : Symbol, IReadOnlySymbol {
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29 | public const string StartSymbolName = "StartSymbol";
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30 | public const string StartSymbolDescription = "Special symbol that represents the starting node of the result producing branch of a symbolic expression tree.";
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31 | private const int minimumArity = 1;
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32 | private const int maximumArity = 1;
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33 |
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34 | public override int MinimumArity {
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35 | get { return minimumArity; }
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36 | }
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37 | public override int MaximumArity {
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38 | get { return maximumArity; }
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39 | }
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40 |
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41 | [StorableConstructor]
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42 | private StartSymbol(StorableConstructorFlag _) : base(_) {
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43 | }
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44 | private StartSymbol(StartSymbol original, Cloner cloner) : base(original, cloner) { }
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45 | public StartSymbol() : base(StartSymbol.StartSymbolName, StartSymbol.StartSymbolDescription) { }
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46 |
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47 | public override IDeepCloneable Clone(Cloner cloner) {
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48 | return new StartSymbol(this, cloner);
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49 | }
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50 |
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51 | public override ISymbolicExpressionTreeNode CreateTreeNode() {
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52 | return new SymbolicExpressionTreeTopLevelNode(this);
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53 | }
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54 | }
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55 | }
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